Blockchain & Web3 Development
Smart contract development, RWA tokenization, and audit-ready Solidity — including a nationally licensed B2B tokenization platform delivered in El Salvador in eight weeks.
Smart contract development for production
We write Solidity meant to hold other people's money: explicit invariants, exhaustive tests in Foundry, upgradeable architectures using transparent or UUPS proxy patterns, and code prepared for third-party review before the auditors arrive. Most of our contract work sits underneath financial products — tokenized assets, payment settlement, stablecoin flows — where a bug is a balance-sheet event, not a bug ticket.
Upgradeability is a design discipline, not a checkbox. We plan storage layouts, admin roles, timelocks, and emergency paths up front, because real products keep iterating after mainnet. Contracts we have shipped have passed external audits, including Hacken audits on our El Salvador tokenization work, and we treat the audit as a gate rather than a formality.
RWA tokenization development
Real-world asset tokenization is mostly not a smart contract problem; it is a compliance and integration problem with a contract at the center. We delivered a B2B RWA tokenization platform in El Salvador under the country's CNAD licensing regime — Base Network contracts, Hacken audits, PrimeVault custody, and Sumsub KYB — shipped end to end in eight weeks.
That build shaped how we approach every tokenization project: permissioned transfers that enforce investor eligibility on-chain, custody integration from day one, issuance and redemption flows that reconcile against off-chain records, and reporting a regulator can consume. Token standards are chosen per jurisdiction and asset, because the license drives the design more than the whitepaper does.
Why CodeDecoders for blockchain development
Plenty of Web3 agencies have deployed contracts; far fewer have delivered a licensed financial platform on top of them. Our blockchain work is grounded in the rest of our practice — payment infrastructure with $100M+ processed, double-entry ledgers, OTC operations at $3.4B+ tracked — so the on-chain layer always reconciles with the off-chain books.
We are also honest about when you do not need a blockchain. If a PostgreSQL table serves your users better, we say so in the first call. That costs us some short-term revenue and earns the kind of trust that has kept clients with us since 2021.
Engagement and delivery
Contract engagements are fixed-scope: specification, implementation, test suite, audit support, and deployment, typically four to eight weeks depending on protocol complexity. Tokenization platforms are phased — contracts first, then custody and KYB integration, then operations tooling — with the eight-week El Salvador delivery as a reference point for a focused scope.
Post-launch, we handle monitoring, upgrades, and incident response under retainer, or hand over to your team with runbooks and documented admin-key procedures. Either way you own the repositories and the keys. On-chain systems fail loudly and publicly, so we treat operational readiness — alerting, pause procedures, upgrade rehearsals — as part of delivery rather than an upsell.
Contracts
Chains
Security & compliance
Common questions
How much does smart contract development cost?+
Scope and risk drive it: a focused protocol with a clean specification costs materially less than a novel mechanism that needs multiple audit rounds. We quote fixed prices per phase after reviewing your specification, or after writing one with you. Third-party audit fees are budgeted separately, and we prepare the code so those engagements go quickly.
How long does an RWA tokenization project take?+
Our reference delivery — a licensed B2B tokenization platform in El Salvador with audits, custody, and KYB — shipped in eight weeks. Your timeline depends mostly on licensing and partner onboarding, which can run in parallel with the build. The engineering is rarely the critical path if it starts early enough.
Do you audit your own contracts?+
No, because self-audits are worthless as assurance. We write contracts to be audited — full test coverage, documented invariants, clean diffs — and then support a third-party firm through the review. Our El Salvador tokenization contracts were audited by Hacken, and findings get fixed fast because the code was built for scrutiny.
Which chains do you build on?+
Primarily EVM chains: Base, where our licensed tokenization platform runs, plus Ethereum mainnet, Arbitrum, and Polygon. The EVM focus is deliberate, because that is where audit tooling, custody support, and institutional infrastructure are deepest. If your requirements genuinely point elsewhere, we will say so rather than stretch.
Can you make our contracts upgradeable without adding risk?+
Upgradeability is standard in our financial contract work, using transparent or UUPS proxies with carefully managed storage layouts. The safety comes from process as much as pattern: timelocked upgrades, multisig admin roles, and rehearsed procedures. We also document what must never change, which matters as much as what can.
Building blockchain & web3? Let's scope it.
We scope engagements in days, not weeks. Send a few lines about your project and we respond within 24 hours.
Let's build something extraordinary together.
Free consultation·Response within 24h·No commitment
info@codedecoders.io