Smart Contract Development

Smart contracts built by auditors.

Production-grade smart contract development by engineers who audit for a living. Solidity and Solana. Built with invariants, tests, and the audit handoff in mind from day one.

Solidity · Solana · Anchor · auditor-built

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Why this exists

The cheapest bug is the one you never wrote.

Audits catch bugs late. Some bugs — architectural mistakes, broken invariants, wrong trust models — can’t be fixed without rewriting half the code. The fix is to write the code in the first place with the audit’s eye open. That’s what we do here.

Scope

What we build.

Solidity

Solidity development

Production-grade Solidity for any EVM chain. Greenfield protocols, integrations, hardened forks, and emergency rewrites, with Foundry invariants and the audit-handoff package built in.

Solana

Solana development

Production-grade Anchor or native Solana programs. CPI-safe design, Trident fuzzing, and the audit-handoff package built in. Greenfield programs, integrations, and rewrites.

Why us

Built differently.

Auditor's lens

We catch our own bugs at write-time

Every line is reviewed against the patterns we look for during audits. The bugs that usually surface in week 4 of an audit get caught while the code is still fresh.

Testing discipline

Invariants and properties, not just unit tests

Foundry invariant suites, property-based tests, and fuzz harnesses are first-class deliverables. The test suite makes future auditors faster and your protocol harder to break.

Audit handoff

Designed to pass an external audit

Your eventual third-party audit will be faster, cheaper, and shorter. The code is documented, tested, and structured the way auditors expect.

Selected work

Builds we’ve shipped.

A sample of recent development engagements across Solidity, Solana, and Rust. Most builds for active protocols stay private; public links point to open-source repos and testing campaigns.

  • SolidityNov-Dec 2025

    DUTCH Protocol

    Bonding curve NFT marketplace.

    View repo
  • SolidityFeb-Aug 2025

    Mangrove

    Risk-neutral hedging strategy. Uniswap Hook Hackathon winner grant.

    Private engagement
  • RustJan-Jun 2025

    Paragon

    Solana indexer, Telegram bot, DEX integration, raiding bot.

    Private engagement
  • SolanaApr 2025

    Neptun Finance

    Solana LBP launchpad.

    Private engagement
  • SolanaMar 2025

    Neptun Finance

    Testing campaign for Liquidity Bootstrapping Pool launchpad on Solana.

    Private engagement
  • RustMar 2025

    Paragon

    Solana DEX.

    Private engagement
How pricing works

Scoped to your build.

Development engagements are sized to feature scope, integration surface, and timeline. Talk to us for a scope, milestones, and a quote.

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FAQ

Questions.

Yes. End-to-end design and implementation of new protocols — token economics, contract architecture, test suite, and deployment scripts. We work with your existing team or as a turnkey build.

Yes. Forks of Uniswap V2/V3/V4, Compound V2/V3, Aave, ERC-4337 reference, etc. We add invariants and adversarial tests that the upstream protocol may not have, and we audit the diff.

Not as the formal external audit. We bake security into the build, but you should still commission an independent audit before mainnet. We help you scope and prepare for that engagement.

Solidity on every EVM chain, Solana (Anchor and native) Rust programs. Pick the language page for the full scope.

Yes. Foundry deployment scripts, Anchor deploy flows, runbooks, multisig configuration, and operational checklists are deliverables, not afterthoughts.

From four weeks for a focused module to twelve-plus weeks for a full protocol. We scope and quote against your specific design before you commit.

We don't do open-ended development retainers. The Security Audit Subscription is for ongoing review of code your team writes; this service is dedicated build work scoped against a deliverable.

From our research

Go deeper.

Methodology

Defense in depth: our audit workflow

Our security philosophy in detail — applied to building code, not just reviewing it.

Discipline

Fuzzing and formal verification in blockchain security

Why property-based testing belongs in your codebase from day one, not after the audit.

Pre-audit

The pre-audit checklist

What your code should look like before you hand it to an external auditor — every item on this list, your build should ship with.

Other services

Need something else?

Audit

Smart contract audits

After the build is ready, the independent external audit. Often the next step after a development engagement.

Subscription

Security Audit Subscription

Ongoing weekly review of your team's code while you build.

Bundle

Full-Stack Audit

When the build is done, pair the on-chain audit with the off-chain pentest in one engagement.

Ready when you are

Ready to build?

Send us a design doc or spec and a target date. We’ll come back with a scope, milestones, and a quote within 24 hours.

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