We offer end-to-end development services for businesses integrating crypto payments. Every engagement is scoped, priced, and delivered as a fixed-scope project — no hourly billing surprises.
Payment Gateway Integration
We design and build custom crypto payment gateways tailored to your business model, whether you are a marketplace, SaaS platform, e-commerce retailer, or remittance provider.
What is included:
- Support for Bitcoin, Ethereum, Polygon, Solana, and all major EVM chains
- Stablecoin acceptance: USDC, USDT, DAI, EURC
- Real-time fiat conversion via integrated liquidity providers
- Webhook-based settlement notifications
- Merchant dashboard with transaction analytics
- Refund and dispute management workflows
- PCI-DSS and GDPR compliant architecture
Typical project timeline: 8–14 weeks
Lightning Network Payments
For businesses that need fast, low-cost Bitcoin payments — particularly in micropayment, gaming, content, and tipping use cases — we build production-grade Lightning Network integrations using LND, Core Lightning, and Eclair.
What is included:
- Node setup, channel management, and liquidity strategy
- LNURL and BOLT11/12 invoice generation
- Point-of-sale and e-commerce plugin integration
- Automated channel rebalancing
- Watchtower setup for non-custodial deployments
Typical project timeline: 4–8 weeks
Wallet Development
We build self-custody and custodial wallets for consumer and enterprise use. Our wallet products have managed over $800M in combined assets under custody.
What is included:
- BIP32/39/44 HD wallet derivation
- Multi-signature (2-of-3, 3-of-5) with hardware wallet support (Ledger, Trezor, Coldcard)
- MPC (multi-party computation) key management for institutional custody
- Mobile wallets: React Native for iOS and Android
- Browser extension wallets
- Transaction signing with HSM integration
Typical project timeline: 12–20 weeks
Smart Contract Development & Auditing
We write and audit smart contracts for payment escrow, token vesting, DAO governance, staking, and custom DeFi protocols. Every contract we deploy has been reviewed by at least two senior engineers and tested against a formal specification.
What is included:
- Solidity (Ethereum, Polygon, Arbitrum, Base, Optimism)
- Rust/Anchor (Solana)
- Move (Sui, Aptos)
- Static analysis with Slither and Mythril
- Fuzz testing with Foundry and Echidna
- Formal verification for critical paths
- Audit report suitable for public disclosure
Typical audit timeline: 2–4 weeks per 1,000 lines
DeFi Integration & API Development
We build the middleware that connects your application to DeFi protocols — handling liquidity, slippage, gas optimisation, and cross-chain routing so your product team does not have to.
Protocols we integrate regularly:
- Uniswap v3/v4, Curve, Balancer (DEX / swaps)
- Aave v3, Compound v3 (lending)
- LayerZero, Wormhole, Axelar (cross-chain)
- Chainlink, Pyth, Redstone (price oracles)
- Transak, MoonPay, Ramp (fiat on-ramps)
Blockchain Consulting & Architecture Review
Not sure which chain to build on, whether to self-custody or use a custody provider, or how to structure your token economics? We offer structured advisory engagements from one week to three months.
Past advisory clients have included a UK FCA-regulated crypto exchange, a Cayman-domiciled DeFi protocol, and a publicly listed payments company evaluating stablecoin treasury operations.
Get a Proposal
Every project starts with a free 45-minute technical scoping call. We will ask the hard questions upfront and give you an honest view of timelines, costs, and risks before any contracts are signed.