Blockchain Development
End-to-end blockchain development across EVM chains, Solana, MultiversX, NEAR, Stellar, and beyond. We design the architecture before writing a single line of contract code.
$10B+
loans booked · Membrane
$100M
TVL · Hatom
$2.2B
BTC TVL · Solv
90-day
warranty
5.0 · 10 verified reviews on Clutch
Architecture decision record
Before writing code, we define what goes on-chain vs. off-chain, which chain fits the use case, and why. You get a documented architecture record, not just a verbal recommendation.
Multi-chain production experience
Production deployments on Ethereum, Arbitrum, Base, Optimism, Polygon, MultiversX, and Solana. We know the quirks of each chain, not just the documentation.
DeFi protocol engineering
AMMs, lending markets, yield vaults, and cross-chain liquidity infrastructure. Economic design and attack surface analysis built into the development process.
NFT & RWA
Custom NFTs with royalty logic, minting infrastructure, allowlist mechanics, and on-chain metadata. From collectibles to RWA tokenization and utility-first token systems.
Cross-chain bridges & interoperability
Token bridges, message-passing protocols, and multi-chain deployment strategies. We have built production bridges and know where they fail.
How we engage
The engagement process
Architecture & chain selection
We map requirements to on-chain constraints, evaluate chains across gas cost, TPS, and security track record, and deliver a written architecture decision record.
Smart contract development
Contract design, implementation, test suite, and integration tests covering edge cases and economic attack vectors.
Security review
Internal audit pass before external audit engagement. Static analysis, manual review, and fuzz testing.
Deployment & monitoring
Staged deployment (testnet to staging to mainnet), deployment scripts, upgrade mechanisms, and on-chain monitoring setup.
Official foundation partners
We hold official partnerships with Arbitrum, NEAR and MultiversX, which means direct protocol-team access when your architecture touches edge cases.
Production contracts, not demo work
We built Hatom (the first lending protocol on MultiversX), Membrane (multi-chain OTC clearing), and PlanetaryX (tokenized biodiversity RWAs on-chain). Real protocols with real users.
Security built in, not bolted on
Our engineers have audited and been audited. Security patterns, including economic attack modeling for DeFi, are part of the development process, not a checkbox at the end.
Our stacks & tools
- Solidity
- Rust
- TypeScript
- Foundry
- Hardhat
- Anchor
- OpenZeppelin
- Metaplex
- Ethereum
- Arbitrum
- Base
- Optimism
- Solana
- MultiversX
- NEAR
- Stellar
- Linera
- Chainlink
- Pyth
- The Graph
- IPFS
- Wagmi
- Viem
- Tenderly
- Alchemy
- Slither
- and more
90-day post-launch warranty
Every engagement includes a 90-day warranty after launch. If something breaks in production, we fix it. No new contract, no billing conversation.
Questions we hear often
Specific questions? Book a 30-minute discovery call. No commitment, just honest answers.
Get in touchWe have production experience on Ethereum, Arbitrum, Base, Optimism, Polygon, Solana, MultiversX, NEAR, Stellar, and Linera. We can also scope custom L1/L2 rollup builds on the OP stack or Arbitrum Orbit. If you are building on a different chain, tell us; we evaluate each one honestly.
Every engagement includes an internal security review pass. For high-value protocols (DeFi, custody systems, bridging infrastructure), we recommend an external audit and can connect you with our audit partners. We also offer our own Smart Contract Audit service.
That is a common scenario. We start with a codebase review to understand what has been built, flag risks, and scope the remaining work. We can take over an existing codebase without starting from scratch.
Any production bug in code we wrote. If a contract behaves unexpectedly in production within 90 days of launch, we fix it at no additional cost. It does not cover bugs introduced by third parties or changes requested after launch.
Get in touch
Let's build what's next
Tell us about your challenge or book a call directly. We'll get back to you within one business day.
Fastest path
Book a 30-min call
Pick a slot that works for you. No lengthy intake form, we come prepared with the right questions.
- 1
30-min discovery call
We understand your system, timeline, and constraints. No upsell, no pressure.
- 2
Honest fit assessment
If we're not the right match, we'll say so and suggest alternatives.
- 3
Architecture review
If we align, a short review validates scope and de-risks delivery.
- 4
Sprint-based delivery
Senior ownership end-to-end, with a 90-day post-launch warranty.
Marcos Tacca
VP of Operations, Rather Labs. You'll speak with him directly.