German precision engineering for high-performance, latency-bounded on-chain execution. We build sequencers, rollup infrastructure and audited smart contracts across Ethereum, Base, Arbitrum and 7 more chains for trading venues, FinTech platforms and institutional settlement teams. Security-first since 2012.
Halbach Systems is a blockchain development company based in Munich and Singapore that engineers high-performance, latency-bounded execution layers, rollup sequencers and audited smart contracts for trading venues, FinTech platforms and institutional settlement teams. Founded in 2012, it has shipped 186 mainnet contracts with zero critical findings and no funds lost to its code.
The custom blockchain development market reached USD 17.5 billion in 2023 and is projected to grow at 87.7% CAGR through 2030 per Grand View Research. Where we operate within it, throughput and finality are the constraints that matter. Our delivery footprint:
Deployment, audit and review figures are sourced from on-chain deployment receipts and verified review platforms. See the editorial policy for method.
Every engagement opens with a written performance budget: p99 latency, throughput floor and sequencer fault behaviour, fixed before code. Arborwave Exchange went from 540ms to 34ms matching-engine p99 because the target was a contract term, not an aspiration.
Slither, Mythril, Foundry fuzzing and Halmos symbolic execution run in CI on every commit, ahead of external audit. All 186 of our mainnet contracts carry zero critical findings and no funds have ever been lost to a Halbach-shipped contract.
Our research shows 63 percent of extracted value comes from non-deterministic ordering windows, not contract bugs. We close those windows at the sequencer. Vesperine Protocol saw sandwich losses fall to zero after we rebuilt its ordering layer.
Halbach Systems delivers end to end blockchain development across nine capabilities, from custom chains and smart contract engineering to rollup sequencers, MEV mitigation and cross-chain infrastructure. Every engagement is treated as a full cycle blockchain development project: performance budget first, production-hardened delivery second.
Custom chains, consensus tuning and execution architecture for private, public and hybrid models. Covers permissioned blockchain development for regulated institutions and public EVM deployments alike. Our blockchain engineering team sizes the consensus mechanism to the throughput target before writing a line of code.
Audit ready smart contracts in Solidity, Vyper and Rust with Foundry testing, Hardhat testing and formal verification on every execution path. We treat smart contract deployment as a production release: CI enforces contract test coverage gates before any artifact reaches testnet.
Matching engines and on chain execution paths engineered to a fixed p99 latency and throughput budget. Off chain settlement components are co-designed so the full round-trip stays within the performance contract.
Custom sequencers, proof pipelines and settlement bridges for application-specific rollups. Layer 2 development at Halbach covers the full blockchain infrastructure: sequencer, prover, bridge and Web3 DevOps pipelines that automate deployment and monitoring from day one.
Slither, Mythril, Echidna and Halmos in CI plus manual review and external audit coordination. Smart contract threat modeling runs in the Architecture phase so the security posture is designed in, not bolted on. We also handle smart contract audit readiness assessments for teams preparing for a third-party review.
Deterministic ordering, encrypted mempools and circuit breakers that close value-extraction windows. DeFi risk controls and oracle risk management are specified at the architecture stage, not retrofitted. Bridge risk management protocols are documented in the deployment runbook for every cross-chain engagement.
Bridge and oracle integration with an execution abstraction layer that normalises RPC, fee estimation and signing so a new chain takes 1 to 2 weeks rather than a rewrite. Multi chain integration is handled by the same blockchain engineering team that built the base protocol.
DeFi protocol development for perpetual DEX development, lending markets, staking smart contracts, yield engines and oracle systems built for institutional volume. Our DeFi engineering covers the full stack: DeFi backend development, smart contract logic and production monitoring under a sustain retainer.
DAOs, asset tokenization, MPC signing infrastructure and token-gated platforms with auditable governance from day one. Digital asset software development at enterprise scale, with role based smart contracts and upgradeability planning baked into the architecture from the start.
Halbach Systems standardises on a production-validated stack across every Blockchain Development Company engagement, covering chains, languages, frameworks, token standards and infrastructure. Stack choices are made in the Architecture phase against the performance budget, not after.
Halbach Systems works with teams that have a hard latency, throughput or settlement constraint, where ordering and finality decide the outcome. We serve as a blockchain technology partner for enterprises that need secure blockchain development services and cannot afford the rework that follows an under-specified execution layer.
Three ways to work with us, matched to how fixed your scope and performance budget already are.
A defined deliverable against a written performance budget. Protocol sprints from EUR 36,000, high-performance dApps from EUR 70,000 to 220,000, rollup infrastructure from EUR 240,000 to 620,000.
A Halbach pod embedded with your team for an open-ended roadmap, billed time-and-materials at EUR 1,540 per engineer day with the same audit and latency discipline.
Production support, monitoring and incident response for a system already live, on a retainer from EUR 13,800 per month with a defined response window.
Six variables move the cost of a Blockchain Development Company engagement the most. Understanding them before your first call prevents scope surprises and shortens contract negotiation.
A single audited smart contract protocol sprint starts at EUR 36,000 fixed. A custom L2 with sequencer, prover and bridge runs EUR 240,000 to 620,000. Every step up in scope multiplies engineering weeks and external audit time.
EVM chains use the same Solidity toolchain and share the execution abstraction layer, keeping cost predictable. A custom L1 or Solana-native program in Rust adds specialised engineering days. Multi-chain deployments add the abstraction layer build, typically 2 to 4 weeks.
Internal CI (Slither, Mythril, Foundry, Halmos) is included on every engagement. Formal verification with Certora Prover and a coordinated external audit with a named firm adds 3 to 6 weeks and typically EUR 18,000 to 40,000 in third-party fees, which Halbach can procure or the client can arrange independently.
A fixed p99 latency contract (for example, 40ms matching-engine p99) requires adversarial load testing against the full sequencer stack. This adds a load-test sprint and can require cross-region infrastructure provisioning during validation, adding cost relative to a best-effort build.
BaFin TSP notification documentation, MiCA technical standards alignment or SOC 2 scope extension each require dedicated control documentation, security evidence packs and review cycles. German and EU-regulated clients typically add 10 to 20 percent to the base engagement cost.
On-call retainers run from EUR 13,800 per month and are priced by the contractual response-time SLA (1-hour critical vs next-business-day standard), on-call headcount and whether the client requires a named incident commander. Post-launch scope expansions inside a retainer are billed at the same EUR 1,540 per engineer-day T&M rate.
All prices exclude VAT. EUR pricing at signing; USD-denominated engagements available on request. Discovery (3 weeks, EUR 12,000) locks in the final estimate before full engagement begins.
An engineered execution layer fixes latency, ordering and security as contractual guarantees. An off-the-shelf stack inherits whatever the template provides.
| Factor | Engineered with Halbach | Off-the-shelf stack |
|---|---|---|
| Latency profile | p99 budget fixed in the contract, verified under load | Whatever the default stack delivers, often untested at peak |
| Ordering and MEV | Deterministic ordering, encrypted mempool, circuit breakers | Public mempool, sandwich and front-running exposure |
| Security posture | Threat-modelled to your attack surface, externally audited | Inherits the template code and its attack surface |
| Gas efficiency | Storage layout and calldata tuned for the hot path | Generic optimisation, costs compound at volume |
| Sequencer faults | Defined failover, no single point of downtime | Often a single sequencer with no documented failover |
| Multi-chain | Execution abstraction layer, new chains in 1 to 2 weeks | Locked to vendor-supported chains |
| Cost | EUR 70,000 to 620,000 build plus audit | Lower up front, higher in incidents and rework |
Best fit for engineered: trading venues, perpetual DEXs, institutional settlement, anything with a hard latency or throughput target. Best fit for off-the-shelf: prototypes and low-stakes experiments with no performance constraint.
Picking the wrong execution environment adds months of rework. This table maps common Blockchain Development Company scenarios to the chain or architecture that fits them, based on Halbach's delivery data across 186 mainnet contracts.
| Use case | Recommended approach | Finality | Compliance fit | Relative build cost |
|---|---|---|---|---|
| High-frequency DEX, matching-engine latency under 50ms | Custom appchain rollup (Mantle / OP Stack) with deterministic sequencer | Sub-2s on L2 | MiCA / BaFin-compatible with correct legal wrapper | EUR 240,000+ |
| Institutional settlement, EUR/USD notional above EUR 100M/yr | Application-specific L2 with encrypted mempool and permissioned settlement bridge | 1 to 3s (L2) | Strong: permissioned layer, auditable approvals | EUR 240,000 to 620,000 |
| DeFi lending or perpetual protocol, standard EVM | Arbitrum One or Base (Nitro/OP Stack) with Foundry CI and external audit | ~1s (Nitro) / ~2s (OP) | Good for public DeFi; add KYC layer for regulated | EUR 70,000 to 220,000 |
| ZK-proof required (privacy or verifiable computation) | Polygon zkEVM or Scroll (native ZK rollup) | Several minutes (proof gen) | Strong for verifiable compliance, slower settlement | EUR 120,000 to 300,000 |
| High-throughput token economy, NFT marketplace or gaming | Ethereum L1 (authority) + Base (low-fee execution layer) | ~12s L1 / ~2s Base | Moderate: public chain, standard ERC compliance | EUR 70,000 to 160,000 |
| Real world asset (RWA) tokenization, regulated issuer | Permissioned EVM (private fork or Polygon CDK) with on-chain KYC enforcement | Configurable (BFT, 1 to 5s) | Best: whitelist enforcement, full auditability | EUR 180,000 to 400,000 |
| Treasury or MPC signing infrastructure, multi-chain | Execution abstraction layer across 10 chains, Safe multisig integration | Varies per chain | High: threshold signatures, auditable approval trail | EUR 80,000 to 200,000 |
Decision rule: if latency and throughput are the constraint, choose an L2 or custom rollup. If regulatory auditability is the constraint, choose a permissioned EVM with on-chain access control. If cost is the constraint and the workload is public DeFi, Base or Arbitrum One delivers the best cost-to-security ratio in Halbach's experience.
We decline roughly 41 percent of RFPs we receive. Forcing a bad fit costs both sides months and damages the outcome.
The risk is concrete. According to the Chainalysis 2024 Crypto Crime Report, USD 1.7 billion was stolen from DeFi protocols in 2023, with a large share of value extracted through ordering and oracle manipulation rather than raw code bugs. We built our practice around refusing to ship execution paths that cannot survive that environment.
Matching-engine p99 latency 540ms → 34ms. MEV sandwich incidents eliminated. Zero sequencer downtime in 16 months.
Deterministic ordering layer with encrypted mempool and documented failover across two regions. Liquidations pause if the sequencer health check fails. The engagement also included a transaction safety review covering oracle integration points and bridge risk management to keep the full execution path hardened end to end.
Settled €6.1B notional in year one on a custom Mantle-based L2. Gas per settlement down 71 percent. p99 finality under 2 seconds.
Application-specific rollup with a custom proof pipeline and institutional settlement bridge, operated from our Singapore office. The blockchain infrastructure development scope covered scalable blockchain development across the full settlement stack: sequencer, prover, bridge and production monitoring through a sustain retainer.
Three screens from production deployments, anonymised under client NDA. Real tooling, real telemetry surfaces.
Halbach runs a four-phase protocol, Discovery, Architecture, Build and Production, that fixes a performance budget before any code is written.
Performance budget and threat model written first. p99 latency, throughput floor and fault behaviour agreed before any code.
Execution path, ordering rules, gas layout and sequencer failover designed against the budget and locked from day one.
Slither, Mythril, Foundry fuzzing and Halmos in CI on every commit. External audit coordination runs in parallel.
Load-tested against the budget, deployment runbook with rollback, monitoring, on-call rotation and incident response.
A Blockchain Development Company engagement with Halbach Systems produces more than running code. Every fixed-scope build delivers a set of documented, transferable artefacts that let your team operate, audit and extend the system independently.
All smart contracts pass Halbach's internal CI (Slither, Mythril, Foundry fuzzing, Halmos symbolic execution) and a coordinated external audit. Verified on Etherscan or the chain's native explorer before mainnet deployment. Zero critical findings is the delivery gate.
A step-by-step deployment playbook covering pre-deployment checks, deployment sequence, post-deployment smoke tests and a documented rollback path. Reviewed by the lead architect before mainnet execution. Includes sequencer failover procedures for L2 engagements.
A formal threat model produced in the Architecture phase, updated after the Build phase to reflect final code. Covers smart contract attack surfaces, oracle manipulation vectors, bridge risk vectors and MEV windows. The evidence pack is the primary input for the external audit and for MiCA or BaFin documentation.
Full ABI documentation for every contract interface. TypeScript and optionally Python SDKs for off-chain callers. RPC endpoint documentation for the execution abstraction layer. Protocol architecture diagrams in Mermaid and SVG formats for internal and regulatory use.
Full Foundry test suite with 100 percent branch coverage on critical contract paths. Echidna property-based test corpus. Gas benchmarks per function. CI pipeline configuration (GitHub Actions or GitLab CI) that gates deployments on coverage and audit results.
Two dedicated handover sessions with your engineering team. Architecture decision records (ADRs) for every significant design choice. On-call runbook for the production team. Full source code repository with history transferred to client ownership. Optional 90-day sustain retainer for a smooth transition.
540ms p99 at peak. Public mempool exposed to sandwich attacks. Sequencer a single point of failure with no documented failover.
34ms p99. Encrypted mempool and deterministic ordering. Zero sequencer downtime in 16 months and MEV sandwich incidents eliminated.
Institutional settlement on L1 with gas costs that compounded at volume and finality that drifted past 12 seconds under load.
Custom Mantle-based L2 settled EUR 6.1B in year one. Gas per settlement down 71 percent. p99 finality under 2 seconds.
Treasury signing on a single hot key across chains, manual approvals, latency over 4 seconds and an audit gap on key custody.
Threshold signing across 12 chains. p99 signing latency under 700ms. Auditable approvals and no single key able to move funds.
Founder and Managing Director · LinkedIn ↗
I came to blockchain from high-frequency trading systems and real-time automotive control, where a missed deadline is a defect, not a degradation. My team and I have shipped 186 contracts to mainnet with zero critical findings and no funds lost to our code. We treat throughput and finality as engineering specifications, not marketing copy.
The lesson that shaped Halbach came in 2014, on a venue I helped run before founding the company. A non-deterministic ordering window let a single actor extract value on every large fill for two weeks before anyone could prove it. The contracts were clean. The ordering was not. I rebuilt the sequencer over a long winter, and "make the ordering deterministic before you make it fast" has been the first design rule on every engagement since.
Read the foundational paper: "Latency-Bounded Execution: Engineering Deterministic Finality Under Adversarial Load" by Dr.-Ing. Lena Hofmann. Halbach Research Note HBS-2026-04, 36 pages.
Ask the founder a questionHalbach Systems operates 79 engineers across Munich and Singapore. A typical Blockchain Development Company engagement draws from seven specialist roles, assembled into a pod matched to the scope. The pod lead is the same engineer from Architecture through Production, not a rotating resource.
Owns the execution architecture: sequencer design, consensus selection, p99 latency budget, storage layout and gas floor. Signs off on every design decision before code. Senior-level, 1 per engagement.
Writes Solidity, Vyper or Rust contracts to the architecture specification. Enforces test coverage gates, formal property suites and CI discipline on every commit. Typically 2 to 4 per engagement depending on scope.
Maintains the threat model, runs Slither, Mythril, Echidna and Halmos in CI, coordinates the external audit firm and reviews every remediation. Acts as the single point of contact for audit findings through the disclosure window.
Owns oracle wiring, bridge integration, execution abstraction layer and cross-chain deployment. Models oracle risk and bridge risk at the Architecture phase so attack surfaces are designed out rather than patched. Manages multi-chain deployments across the 10 supported chains.
Produces BaFin, MiCA or SOC 2 documentation, maps engineering controls to regulatory requirements and liaises with the client's legal counsel on securities classification and AML/KYC enforcement design. Engaged where the client's jurisdiction or use case requires it.
Owns the Foundry and Echidna test suites, adversarial load testing, gas benchmarking and the CI pipeline configuration. Responsible for the coverage report delivered at handover and for staging-environment parity with production.
Translates the client's performance and business requirements into the technical brief, manages milestone tracking and owns the deployment runbook sign-off. Primary client contact from Discovery through Production, with post-launch handover support.
This note formalises the latency-budget methodology Halbach has applied across 186 mainnet contracts since 2012. We analyse 58 sequencer and MEV incidents between 2021 and 2025, decomposing each into an ordering-window vector and a contract-level vector. Across the dataset, 63 percent of extracted value originated in non-deterministic ordering windows rather than contract bugs, even where the contracts passed audit. We present a 4-phase protocol that fixes a performance budget before blockchain architecture, and quantify its effect on p99 latency, gas per operation and post-launch incident rate across three production deployments. A companion annex covers blockchain security engineering controls applied at the sequencer layer, including DeFi risk controls for oracle manipulation and bridge risk management.
Available on request to qualified parties under NDA. Request the full PDF →
Artificial intelligence and blockchain infrastructure are converging at the execution layer. Halbach Systems tracks four integration surfaces where this convergence produces concrete, deployable systems rather than marketing copy.
Agent frameworks (ElizaOS, on-chain ERC-4337 smart accounts) now execute multi-step financial strategies without human approval on each step. Halbach's execution abstraction layer provides the deterministic sequencing substrate that prevents ordering attacks on agent transactions, which carry larger gas premiums and are priority targets for MEV extraction.
Machine learning models trained on on-chain telemetry can flag anomalous liquidity withdrawal patterns and oracle manipulation signatures before they complete. We integrate off-chain ML inference with on-chain circuit breakers: the model's signal triggers a sequencer pause within a single block confirmation window rather than waiting for manual intervention.
Smart contracts that depend on AI-generated outputs need verifiable inference: a proof that the model ran on the stated input and produced the stated output. We architect oracle pipelines that deliver AI inference results with cryptographic attestation, making the AI decision auditable on-chain in the same way a price feed is auditable today.
Large language models accelerate the generation of Certora Prover specifications and Foundry invariant suites, reducing the time from contract draft to formal property coverage by roughly 40 percent in our internal pilots. The human audit lead reviews every LLM-generated invariant before it enters the formal verification CI stage, so speed does not trade off against rigour.
Halbach Systems integrates with named, production-grade protocols on every Blockchain Development Company engagement. These are real integrations with documented API and contract surfaces, not marketing affiliations.
Price feeds, VRF and CCIP cross-chain messaging. Oracle risk management is modelled in the Architecture phase and Chainlink data quality is verified against the performance budget before deployment.
On-chain event indexing and subgraph development for DeFi dashboards, settlement reporting and protocol analytics. Used as the primary indexing layer on DeFi and DEX engagements.
Browser wallet integration for dApp front-ends, including MetaMask Snaps for custom signing flows and account abstraction UX patterns targeting ERC-4337 smart accounts.
Protocol-agnostic wallet connection layer for mobile and desktop dApps. Integrated on every dApp front-end build to support the full range of self-custody wallets without per-wallet engineering.
Multisig and MPC signing infrastructure for treasury and institutional custody workflows. Halbach engineers Safe modules and guards for custom approval policies and integrates Safe SDK into the execution abstraction layer.
Omnichain messaging for cross-chain token transfers and protocol state synchronisation. Used on multi-chain engagements where Across bridge settlement is not sufficient for the messaging pattern required.
Optimistic bridge settlement for fast, low-cost cross-chain liquidity transfer. Integrated on L2 engagements where the rollup does not have a native fast bridge and settlement speed is part of the performance budget.
Institutional-grade MPC custody and key management for treasury teams that require a regulated custodian interface alongside Halbach's custom signing layer. Integrated on institutional settlement and treasury engagements.
Transaction simulation, alerting and production monitoring. Used in the Build phase for gas profiling and as the primary alerting layer in sustain retainers, with custom alert policies tied to the engagement's performance budget thresholds.
AML and KYC verification layer for regulated DeFi and RWA tokenization engagements. Integrated on-chain via a whitelist contract that enforces verified-address access control, meeting BaFin and MiCA KYC obligations at the smart contract layer.
Halbach Systems holds a 4.85 average across 64 verified reviews on Clutch and G2.
Dr. Felix Brandt
Head of Trading Systems at Arborwave Exchange
Halbach rebuilt our matching-engine sequencer to a fixed latency budget and held it as a contract term. p99 went from 540ms to 34ms, sandwich incidents stopped, and we have had zero sequencer downtime in 16 months. They engineer like an automotive supplier, not a crypto shop.
540ms → 34ms p99Yuki Tanabe
Managing Director at Solferino Markets
We settled EUR 6.1 billion in our first year on the rollup Halbach built for us. Gas per settlement fell 71 percent and finality stayed under 2 seconds. Their Singapore team understood institutional settlement constraints from day one.
€6.1B settled, gas -71%Markus Vogel
CTO at Nordhaven Treasury
Halbach designed our MPC signing cluster with a 5-of-7 threshold across 12 chains and held p99 signing latency under 700ms. No single key can move funds and every approval is auditable. Exactly the rigour our board demanded.
p99 under 700ms, 12 chainsSofia Almeida
VP Engineering at Vesperine Protocol
Our users were being sandwiched on every large trade. Halbach rebuilt the ordering layer with deterministic sequencing and an encrypted mempool, and sandwich losses went to zero. They proved the fix against historical attack data before deploying.
MEV sandwich losses to zeroAnand Krishnan
Founder at Talgarth Settlements
Halbach migrated our settlement flow to a custom rollup and brought finality under 2 seconds with fees down 64 percent. They told us early which parts of our design did not need a blockchain at all, which saved us a quarter of wasted work.
Finality under 2s, fees -64%For a Blockchain Development Company serving trading venues and institutional settlement teams, security is a delivery specification, not a checkbox. Halbach Systems treats compliance and smart contract security engineering as contract terms, not optional add-ons.
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Last updated: 2026-06-13
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2. Scope of services. Engagements with Halbach Systems are governed by a separate signed Statement of Work that defines deliverables, milestones, payment terms, IP assignment and warranties. The pricing bands and timelines on this page are indicative ranges from prior projects, not binding offers.
3. Smart contract risk. Smart contracts deployed at client direction carry inherent risk including code-level vulnerabilities, economic model exploits, ordering and oracle manipulation, governance attacks, third-party dependency failures and chain reorgs. Halbach Systems warrants delivery of audited code per the SOW, not the absence of all possible risk.
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Most Blockchain Development Company RFP processes fail because buyers compare contract counts and hourly rates rather than the criteria that determine production outcomes. These six criteria are what Halbach Systems uses internally to evaluate fit, and what we recommend any buyer apply when shortlisting firms.
A latency budget on paper is not a commitment. Ask whether p99 latency, throughput floor and sequencer fault behaviour will appear in the statement of work as contractual specifications. Halbach fixes them or declines the engagement.
Ask to see a sample CI output showing Slither, Mythril, Foundry and Halmos passing on a prior contract. Ask which external audit firm will review the code and whether remediation is included in scope. The audit should be a structured process, not a single review at the end of the project.
Verify that the engineers who will work on your project have their names on mainnet contracts or published audits, not just a portfolio page maintained by marketing. On-chain deployment addresses and audit PDF authorship are the two objective checks.
For L2 and rollup builds, ask how the sequencer behaves when a region goes down, who is on-call and what the documented failover time is. A firm that has not documented sequencer failover before you asked has not designed it in.
Foundry testing and manual review are necessary but not sufficient for high-value execution environments. Ask whether Halmos, Certora Prover or Echidna are in the CI pipeline. Formal verification catches infinite-input-range bugs that fuzzing cannot reach.
Ask for the handover deliverables list before signing. At minimum it should include full source code, architecture decision records, a deployment runbook and a test suite with coverage report. Halbach delivers all six deliverable categories on every fixed-scope engagement and transfers full IP to the client.
A blockchain development company designs, builds and audits the smart contracts, execution layers and infrastructure that run applications on a blockchain. Halbach Systems focuses on high-performance, latency-bounded systems for trading venues, FinTech platforms and institutional settlement teams. Our core offering is secure blockchain development services paired with blockchain security engineering that covers the full stack: smart contract logic, sequencer ordering and bridge risk management.
Cost depends on scope. A fixed-scope protocol sprint starts at EUR 36,000, a high-performance dApp runs EUR 70,000 to 220,000, and rollup or L2 infrastructure runs EUR 240,000 to 620,000. Dedicated teams are billed at EUR 1,540 per engineer day. Custom blockchain development services outside these tiers are quoted after a 3-week Discovery engagement that clarifies the performance budget and delivery scope.
Look for a written performance budget, an audit process you can inspect, named engineers with verifiable credentials and references you can check. Halbach fixes p99 latency and security as contract terms and declines work that is a poor fit. Ask to see the blockchain engineering team's track record on smart contract audit readiness, not just the number of contracts shipped.
A high-performance build is engineered to a latency and throughput budget from the first design review. We specify p99 latency targets, deterministic ordering rules and sequencer fault behaviour before writing code, then verify against them under adversarial load. Arborwave Exchange went from 540ms to 34ms matching-engine p99 on this approach. Standard blockchain application development fixes the feature list; we fix the performance envelope and derive the feature list from it.
Ethereum, Base, Arbitrum One, Optimism, Polygon zkEVM, Scroll, Blast, Mantle, Berachain and Solana. Our execution abstraction layer normalises RPC, fee estimation and signing so a new chain takes 1 to 2 weeks rather than a rewrite. EVM development is our primary focus, though Solana engagements are available through our blockchain engineering team with dedicated Rust expertise.
Yes. We run Slither, Mythril, Foundry testing and Halmos symbolic execution in CI plus manual review, and coordinate external audits with established firms. All 186 of our mainnet contracts carry zero critical findings and no funds have been lost to a Halbach-shipped contract. Smart contract testing and contract test coverage gates are enforced in smart contract CI CD pipelines before any testnet deployment.
Discovery: 3 weeks. High-performance dApp: 8 to 14 weeks. Rollup or L2 protocol: 6 to 11 months including the external audit cycle. Full cycle blockchain development timelines are fixed at the end of Discovery alongside the performance budget.
Protocol sprint from EUR 36,000 fixed. High-performance dApp from EUR 70,000 to 220,000. L2 or rollup infrastructure from EUR 240,000 to 620,000. Time-and-materials at EUR 1,540 per engineer day. Sustain and on-call retainers from EUR 13,800 per month.
We decline roughly 41 percent of RFPs. We say no when a conventional low-latency database would serve the workload better, when the throughput target is unreachable on the requested chain, and when a token launch lacks legal counsel on securities classification. We also decline blockchain consulting assignments that are scoped only as strategy without a production delivery path, as that is not where our blockchain engineering team adds its highest value.
Verify mainnet deployment receipts on-chain, ask for audit reports from named third-party firms, and confirm the engineers are publicly credited for production code. Halbach Systems publishes certificate numbers (ISO 27001: HBS-IS-2026-0473, SOC 2: HBS-SOC-2026-H1) and links verified Clutch and G2 profiles alongside named founders. Check the track record on smart contract audit readiness, not just contract counts.
Ask: (1) Will you fix a written p99 latency budget as a contract term? (2) Which external audit firm will review the contracts, and who bears the cost of remediation? (3) What is the sequencer failover behaviour and who is on-call after launch? (4) Do you use formal verification tools such as Halmos or Certora, or testing alone? (5) What is the exit and handover plan if we move the project in-house? These five questions separate serious blockchain engineering firms from prototype shops.
Six factors move the price most: scope and complexity (EUR 36,000 for a sprint; up to EUR 620,000 for an L2 rollup), chain selection (EVM is cheaper than custom L1 or SVM), audit depth (formal verification and external audit add 3 to 6 weeks), performance envelope (a fixed p99 budget requires adversarial load testing), regulatory compliance (BaFin or MiCA documentation adds 10 to 20 percent), and the sustain model (on-call retainers from EUR 13,800 per month, priced by response SLA).
Halbach Systems backs its blockchain development process with six commitments that remove the principal risks a buyer faces when engaging a specialist Blockchain Development Company for the first time.
The first conversation is free and outcome-focused. We review your performance target, chain constraints and regulatory context, then tell you honestly whether we are the right fit. No sales pressure, no NDAs required for the first call.
The 3-week Discovery engagement is fixed at EUR 12,000. It produces a performance budget, threat model and delivery estimate. If the full engagement does not proceed, you own the Discovery output in full. No lock-in from the first engagement.
Full IP assignment and source code transfer is standard in every Halbach statement of work. There are no licensing fees, no vendor runtime dependencies and no proprietary libraries that would prevent you from operating, forking or transferring the codebase to another team.
We commit in the statement of work to remediate any critical or high-severity findings raised by the external audit before the mainnet deployment milestone. Our 94 percent external audit first-pass rate means remediation cycles are rare, but when they occur they are our responsibility, not an extra invoice.
Halbach does not operate proprietary RPC infrastructure that you depend on post-launch. Every system is built on public infrastructure (Alchemy, Infura, client's own nodes). You can switch providers, add engineers or move to an in-house team at any point without architecture rework.
Exit terms are written into every engagement from the start. If scope changes make the engagement a poor fit, either side can terminate with a 30-day notice and receive all completed work. Handover always includes source, tests, runbook, ADRs and two knowledge-transfer sessions with your team.
Week 1: kickoff call, codebase and infrastructure access established, performance target confirmed in writing, threat model started. Week 2: first architecture review, p99 budget documented, chain selection validated against the throughput requirement, sequencer failover behaviour specified. By the end of week 2, you have a written performance contract and a signed-off architecture, regardless of which engagement tier you chose.
Describe your performance target and we will tell you what is reachable. We typically reply within 1 business day.