01Delivered to production
Membership platformFounders Club
Frontend, API, escrow contracts, KYC and NFT certificates — one connected product.
Frontend + backend + Solidity + Phil API integrationView case study
Selected blockchain engineering work
Eduardo Melo.
Head of Blockchain.
Hands-on engineer.
I build smart contracts, APIs and the apps around them. My work spans production payments at Philcoin, full-stack membership products and an EVM Layer 1 in Rust.
Florianópolis, Brazil · Remote, US & Europe
Selected experience
Philcoin / YouthChain / Rise / FearsOff / Orium / Seedify
Selected engineering workWhat I built.
What I built.
How it works.
Most of my work lives in private repositories. These cases make my contribution visible through system flows, delivery details and public artifacts where available.
Founders Club
A membership product I built from zero: frontend, backend, smart contracts and integration with the Phil app.
- Purchase and escrow
- Identity verification
- NFT membership certificate
- App benefits and rewards
One connected user journey
- 1PurchaseWallet + Solidity
- 2Verify identityDidit + backend
- 3Issue certificateSolidity + NFT
- 4Connect benefitsPhil API + rewards
Frontend · API · Solidity · Phil ecosystem
01
Philcoin & the Phil app
Head of Blockchain · Four connected products spanning membership, rewards, commissions and token swaps.
02Production integration
App-to-chain integrationPhil app · Rewards
Connected the app, API, rewards service and Polygon contracts — including the failure and recovery paths.
Contracts + backend integration + production reliabilityView case study
03Backend in production
Commission & payout systemAmbassador Program
Commission attribution, a database ledger and treasury payouts signed through AWS KMS.
Backend + treasury integration + member & admin interfacesView case study
04Mainnet demonstration
Token conversion & claimsPHL → GIVE Swap
Polygon swap positions, per-position unlock times and Merkle-proof claims on BSC.
Frontend + Solidity + wallet integration + deploymentView case study
02
Protocol & payment infrastructure
Engineering below the application layer — and the systems that move value across chains.
05Four-validator testnet
Rust · EVM Layer 1YouthChain
Rust consensus, EVM execution, JSON-RPC and engagement batching on a four-validator testnet.
Core protocol + Solidity + application infrastructureView case study
06Production payroll work
Cross-chain payrollRise
Multi-token deposits into USDC and CCTP payroll across 7+ networks, from contracts to async jobs.
Solidity + API + asynchronous processingView case study
03
DeFi, security & earlier delivery
Selected work in contract auditing, NFT infrastructure and blockchain team leadership.
07Completed engagement
Smart contract securityFearsOff
Security reviews across exchange and DeFi contracts, with actionable findings and remediation guidance.
Manual review + static analysis + fuzzingView case study
08Multi-chain protocol work
NFT rental & indexingOrium Network
NFT rental and lending across three chains, with a subgraph covering 15+ event types.
Solidity + event indexing + partner integrationView case study
09Completed delivery
Staking, tokens & NFT launchesSeedify
Led blockchain delivery and review across SFUND staking, GMFAM and two NFT collections.
Solidity + team leadership + security review + CI/CDView case study
The engineer behind the workHands-on delivery.
Hands-on delivery.
Technical ownership.
I’m Eduardo Melo, a blockchain engineer with over five years in Web3 and more than twelve years in software engineering. At Philcoin, I own the on-chain stack and its connections to backend and mobile teams.
My work spans Solidity applications, production integrations, smart contract security and Rust protocol engineering. Earlier in my career, I built enterprise systems with teams at Avanade / Accenture, Beck et al. and Neoenergia.
English · ProfessionalPortuguese · NativeMIT · Blockchain, 2022Udacity · Blockchain Nanodegree
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