Joseph Gimba
Backend engineer with 5+ years building production Node.js and TypeScript services, paired with 3+ years engineering DeFi protocols on Ethereum, Arbitrum, and Solana. I design and ship the full stack behind on-chain products: GraphQL indexers, REST and microservice APIs, Postgres data layers, AWS-native deployments, and the Solidity contracts they integrate with. Active blockchain security researcher with hands-on experience in Slither, Echidna, and Foundry fuzzing, applying the same rigor to backend systems through CI/CD, observability, and exploit-resistant design.
Experience
Backend & Blockchain Developer
DeFi Lords
Lead backend development for a lending, borrowing, and yield protocol, building Node.js/TypeScript services backed by PostgreSQL and Prisma ORM, deployed on AWS. Designed and maintained GraphQL APIs for blockchain indexing across Pendle, Uniswap, and Balancer, exposing position state, vault metrics, and historical yield to web clients. Built CI/CD pipelines (GitHub Actions, Docker) for automated testing, contract deployment, and microservice rollouts, cutting release cycle time and reducing deployment errors. Architected the on-chain core in Solidity: collateral-free borrowing engine, tiered ERC-4626 yield vaults, and automated user onboarding, with security-first patterns and Foundry test coverage. Implemented real-time position tracking and protocol monitoring services, integrating CloudWatch alerts and on-chain event listeners to surface liquidation risk before it materializes.
Blockchain Developer & Educator
NITDA (National IT Development Agency)
Drove Web3 adoption inside a national agency by training engineering teams on smart contract architecture, transparency tooling, and fraud-reduction use cases. Led Solidity development for pilot programs, optimizing gas usage and applying security best practices that reduced transaction costs by 30%.
Backend & Blockchain Engineer (Contractor)
Independent / Multiple Clients
Built backend services and Solidity contracts for NFT marketplaces with OpenSea/Blur-style features, including order matching APIs, indexer pipelines, and metadata services. Engineered a production NFT minting platform processing 3,338 mints at 0.025 ETH each ($330K+ transaction volume), with gas-optimized batch minting and delayed-reveal mechanics. Developed real estate tokenization infrastructure with custom paymaster contracts and automated account creation, abstracting wallet UX away from non-crypto-native investors. Implemented gasless meta-transactions across multiple client products, owning both the relayer service (Node.js + AWS Lambda) and the Solidity forwarder logic.
Software Engineering Intern
Khemsafe Computer & Communication Limited
Hardware/software maintenance, web development support, and Arduino/Raspberry Pi automation projects.
Education
Federal University of Technology, Minna
B.Eng.
Skills
TECHNICAL SKILLS
Backend
Node.js, TypeScript, Express, Prisma ORM, PostgreSQL, GraphQL, REST APIs, Microservices
Cloud & DevOps
AWS (Lambda, EC2, S3, RDS, CloudWatch), Docker, GitHub Actions, CI/CD pipelines
Languages
TypeScript, JavaScript, Solidity, Rust, Go, Python, Move, Cairo
Blockchain Tooling
Foundry (Forge, Anvil, Cast), Hardhat, EthersJs, Web3Js, The Graph, Chainlink, Tenderly, MEV-Boost
Security
Slither, Echidna, Aderyn, Foundry Fuzz, smart contract auditing, responsible disclosure
Domains
DeFi (lending, AMMs, vaults), ERC-4626, rebasing tokens, gasless transactions, cross-chain protocols, RWA tokenization, NFTs, DAOs
Version Control
Git (advanced: rebase, cherry-pick, bisect, conflict resolution), GitHub, GitLab
OPEN SOURCE CONTRIBUTIONS
Active contributor across DeFi, gaming, and infrastructure repos with 20+ merged pull requests covering smart contract optimization, bug fixes, feature work, and technical documentation.
SpotNet
spot-leveraging protocol enabling up to 5x leveraged spot positions via deposit → borrow → swap → redeposit loops across lending protocols.
AutoSwappr
auto-swapping infrastructure for non-stablecoin to stablecoin conversions.
DeRisk
DeFi monitoring and early-warning system for at-risk positions.
Boundless
decentralized crowdfunding and grants platform on Stellar.
StarkMate
decentralized chess platform for AI agents and human players.
SELECTED PROJECTS
BlocklessFund
Solidity, Node.js, React, Wagmi, Chainlink VRF
DAO governance system with commit-reveal voting to secure on-chain ballots against front-running. Chainlink VRF integration for automated, verifiable fund releases when campaign milestones are met. Gasless transaction layer for first-time users, with a Node.js relayer and signed-message verification.
SolStruct — Solidity Project Scaffolding CLI
Rust, CLI Development
Developer productivity tool that bootstraps Solidity projects with secure defaults and customizable templates, cutting setup time by 80%.
Oracle Manipulation Demo
Solidity, Foundry
Educational repo demonstrating flash-loan-driven price oracle attacks against vulnerable DEX integrations, with annotated exploit and remediation paths.
TradeBarter
Move, TypeScript, Node.js
Decentralized P2P crypto-fiat exchange with on-chain escrow and an AI-assisted dispute resolution backend.
EDUCATION & CERTIFICATIONS
B.Eng. Computer Engineering
Federal University of Technology, Minna
Advanced Blockchain Development
Cyfrin Updraft
Coursework: Smart Contract Security & Auditing, Advanced Foundry, Full-Stack Blockchain Development, Foundry Fundamentals.