Blockchain that won't quietly lose money.
One bug in a smart contract can cost a billion. Our code is transparent, automatically tested, and we review it ourselves before a third-party audit.
Valid Ethereum address.
EVM-compatible · ETH · Polygon · Base · Arbitrum
Demo: format + EIP-55 · production: SPL/ERC token balances, on-chain history, multisig audit.
What we solve
- You don't know if your current code is safe
- The token or fee logic doesn't add up on paper
- Transaction costs are unexpectedly high
- Talking to multiple chains is slow and error-prone
What we ship
- Full automated test coverage
- Robot-driven bug hunt · what we catch, the hacker won't
- Predictable transaction costs, measured up front
- One-click deploys to more than one chain
What you get
Ticket and voucher systems on blockchain
Loyalty programs with tokens or NFTs
Security review of your existing code
Connects to Bitcoin, Ethereum, and newer chains
How we work on this
The same risk-reducing rhythm on every project · each step has a measurable deliverable.
- 0101 / 04
Threat model
We walk through the contract's economic drivers on paper. Risk, admin flow, rollback, migration.
- 0202 / 04
Spec + tests
Formal spec, invariants. Foundry / Hardhat test suite with >90% coverage, fuzz on top.
- 0303 / 04
Audit + fuzz
Internal audit, Echidna / Foundry fuzz campaign. Critical issues fixed and re-reviewed.
- 0404 / 04
Deploy + monitor
Testnet → canary mainnet → full rollout. Onchain monitor + pager pipeline for anomalies.
Common questions
What most people ask · answered before you have to.
EVM in all flavors (Ethereum mainnet, Arbitrum, Base, OP, Polygon, zkSync), plus Solana (Anchor), Cosmos SDK, and NEAR.
Threat model first, unit + invariant + fuzz, then manual review. Every audit PR includes a 'what we checked, what we didn't' section.
Not an 80-page PDF. A markdown report + fix PRs into your repo, every finding with an issue + test. Re-review after the fixes.
30-90 days of onchain monitoring, alerts on anomalies (TVL jumps, flashloan patterns). Then we hand over, or keep watching under a retainer.
Fixed-price from €4,000 for a focused contract, scaling with code size and complexity. You get the number before we start · a security review shouldn't run on an hourly meter.
We build the contracts and wire the compliance side: MiCA classification notes, KYC/AML touchpoints, a Hungarian-law review path. We're engineers, not lawyers · but we ship the technical groundwork your counsel signs off on.
Yes. Solidity on Ethereum and EVM L2s, plus Rust / Anchor on Solana · the founder is a School of Solana graduate. We pick the chain by your cost, throughput and user base, not by fashion.
Shipped work
202601 / 03AI solutions · Blockchain & smart contractsSeveral AI agents run in parallel: one reads data, one reads market sentiment, one runs a quant model, one verifies the decision. Works over the top 50 tokens, quantitative and qualitative. Web UI and API.
what we shipped- Multiple AI agents for one decision
- Quantitative + qualitative analysis
- Top 50 tokens monitored
what we usedPythonpandasNumPyscikit-learnLangChainOllama
202502 / 03Blockchain & smart contracts · Websites, web apps & online shopsA platform to list, buy, and sell properties with Ethereum. Every sale comes with an NFT ownership certificate that proves who owns the property on-chain, and moves automatically to the new buyer.
what we shipped- Property catalogue with pricing
- Ethereum payments, integrated
- NFT ownership certificate per sale
what we usedExpressHardhatMochaViteTypeScript
202503 / 03Blockchain & smart contracts · Websites, web apps & online shopsOrganisers create events on Solana, attendees join, check-in is done with a QR code. The organiser sees attendees arrive in real time · all on-chain, all verifiable.
what we shipped- Event creation on Solana
- Non-forgeable on-chain tickets
- QR check-in at the door
what we usedAnchorViteRustTypeScript
Blockchain & smart contracts, city by city
Budapest-based studio · we deliver to the cities and regions below, remote-first with on-site on request.
Let's get started.
Send an email or book a 30-minute call.
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