Professional delivery
"It has been a pleasure working with Max and the Chainza team. All tasks were professionally handled, and the end customer is happy with the work."
Upwork client
Review on Upwork (opens in a new tab)Web3 Engineering Studio - Ukraine
We build the systems behind onchain products.
Chainza helps teams design, build, test, and scale decentralized systems across DeFi, RWA, governance, smart contracts, backend infrastructure, and dApps.
100%
Web3-focused
no generalist sprints
01 - Engineering modules
What Chainza builds
DeFi dApps
Lending, DEX, yield, and liquidity protocol interfaces connected to live on-chain state.
Smart Contract Systems
Auditable, gas-optimized contracts for token standards, vaults, staking, and multi-sig execution.
Backend Indexing & APIs
Event indexers and API layers that transform raw blockchain data into usable application state.
RWA Platforms
Tokenization infrastructure for real-world assets — compliance modules, custody logic, and on-chain settlement.
Governance Tools
On-chain voting, delegation, proposal pipelines, and DAO tooling for protocol decision-making.
Protocol Dashboards
TVL tracking, position monitoring, and analytics interfaces for protocol and risk teams.
Frontend Web3 Interfaces
Production dApp frontends with wallet connection, transaction flows, and chain-aware UI.
Web3 QA
Transaction-level testing, fork simulations, and regression suites for chain interactions.
02 - Capability matrix
Engineering capabilities
FE
Frontend Web3 Engineering
We build chain-aware interfaces that handle wallet connections, transaction signing, real-time contract state, and responsive multi-chain layouts. Frontends are fast, accessible, and production-ready.
StackTypeScriptNext.jsReactwagmiRainbowKitethers.jsTailwind
Technical specifications
LanguagesTypeScript, JavaScript
FrameworksNext.js, React
Web3 layerwagmi, viem, ethers.js
UX/connectRainbowKit, WalletConnect
Data feedsThe Graph, REST, WebSocket
03 - Delivery pipeline
How we ship
Five checkpoints, zero handoff fog.
- Discovery
Understand the protocol
Map actors, contracts, transaction paths, permissions, and edge cases. Identify what the system must never do wrong.
Protocol flows · Token mechanics · Risk surface · Actor roles - Architecture
Design the architecture
Design data, transaction, and integration architecture across contracts, APIs, and UI. Document before building.
System diagrams · Data models · API schemas · Contract interfaces - Engineering
Build the core system
Build smart-contract integrations, backend services, and dApp interfaces in parallel through shared typed interfaces.
Contracts · Indexers · APIs · Frontend · CI/CD - QA & Security
Test blockchain flows
Test real blockchain states, failures, permissions, and chain-specific behavior on mainnet forks before deployment.
Fork tests · Revert paths · Gas · State invariants · E2E - Operations
Iterate and scale
Support launch, production hardening, iteration, and scaling. Monitor, measure, and improve in real conditions.
Monitoring · Incident response · Feature iteration · Scaling
- 01Discovery
Understand the protocol
Map actors, contracts, transaction paths, permissions, and edge cases. Identify what the system must never do wrong.
Protocol flows · Token mechanics · Risk surface · Actor roles - 02Architecture
Design the architecture
Design data, transaction, and integration architecture across contracts, APIs, and UI. Document before building.
System diagrams · Data models · API schemas · Contract interfaces - 03Engineering
Build the core system
Build smart-contract integrations, backend services, and dApp interfaces in parallel through shared typed interfaces.
Contracts · Indexers · APIs · Frontend · CI/CD - 04QA & Security
Test blockchain flows
Test real blockchain states, failures, permissions, and chain-specific behavior on mainnet forks before deployment.
Fork tests · Revert paths · Gas · State invariants · E2E - 05Operations
Iterate and scale
Support launch, production hardening, iteration, and scaling. Monitor, measure, and improve in real conditions.
Monitoring · Incident response · Feature iteration · Scaling
04 - Selected work
Case studies
A short preview of the systems we have helped ship, with the broader archive available on the full case studies page.
Problem
A DeFi team needed lending interfaces with position tracking, health factor visibility, and transaction flows that could handle wallet, gas, and revert states clearly.
Chainza contribution
Implemented deposit, withdraw, borrow, and repay flows; connected position dashboards to indexed protocol data; and added QA coverage for transaction states and failure paths.
System scope
Frontend dApp, backend indexing service, smart contract integration layer
Tech stack
Next.jswagmiSolidityThe GraphNestJSPostgreSQL
Outcome
Delivered frontend integration, API layer, and transaction-flow QA for a lending protocol MVP.
05 - Client feedback
What clients say
Web3 expertise
"Their top expertise in Web3 technologies is remarkable, enabling them to deliver cutting-edge solutions."
Igor Chygrynov, Managing Director at bitoftrade
Review on Clutch (opens in a new tab)Future collaboration
"Vlad and his colleagues at Chainza have demonstrated a great level of professionalism. I'll be glad to involve them in future projects."
Upwork client
Review on Upwork (opens in a new tab)Responsive delivery
"The delivery of the product was accurate, and the team consistently responded to my needs."
Noa Gurovich, CEO at TechUp
Review on Clutch (opens in a new tab)Clear communication
"Ihor is a fantastic developer. He communicated clearly and on time. I appreciate the development work he was able to do for us. Highly recommended."
Upwork client
Review on Upwork (opens in a new tab)Commitment
"We appreciated their professional attitude, creativity, and dedication to delivering the best results."
Consultant at cc32d9
Review on Clutch (opens in a new tab)Engineering partnership
"I'm happy to recommend Vlad and his team for projects that need serious engineering efforts and problem solving. It's always been a quick delivery of well designed software. I'll be glad to hire the team for future projects."
Upwork client
Review on Upwork (opens in a new tab)06 - Engineering talent
Engineers trained for Web3 complexity.
Chainza develops engineers through internal training in DeFi concepts, blockchain fundamentals, smart-contract interaction, transaction flows, and production-grade Web3 development — before putting them on client projects.
Every engineer on your project knows what an AMM invariant is, how reentrancy works, and what a mainnet deployment actually requires. That's not a given in most Web3 agencies. At Chainza, it's the baseline.
The result
A disciplined engineering organization that ships production Web3 systems — not an outsourcing shop that learned Solidity last month.
01Foundation
Web3 fundamentals
EVM internals, consensus mechanics, gas economics, transaction lifecycle, and cross-chain interaction patterns.
02Protocol layer
DeFi mechanics
AMM invariants, lending protocols, yield strategies, oracle security, liquidity provision, and economic attack vectors.
03Contract layer
Smart-contract interaction
ABI encoding, multicall patterns, event parsing, signature verification, and reentrancy — understood, not memorized.
04Engineering layer
Production delivery
Wallet integrations, chain-aware state, deployment pipelines, monitoring, incident response, and mainnet operations.
Start a conversation
Building something onchain?
Bring us the protocol, product, or problem. We'll help design, build, test, and scale the system behind it.