Web3 Retention Infrastructure Engineer with 3+ years shipping production GameFi backends, staking economies, and token utility systems. I write Solidity, architect PHP/MySQL game servers, and design the engagement loops that turn post-mint drop-off into durable retention.
Production infrastructure with real users, real transactions, and measurable retention outcomes.
A persistent crime territory RPG built as the flagship engagement product for 10,000 PunksReBased holders on Base. Runs a dual free/premium tier season economy with automated reward distribution, cron-driven game ticks, and zero admin intervention per cycle. The broader Punkverse ecosystem spans PunkArcade (autonomous Showdown brackets + Real//Rebased prediction engine), PunkVault (portfolio dashboard with Time Machine + Smart Money Tracker), and PunkLocker (NFT vault with on-chain loyalty score accrual and anti-sell penalty mechanics).
Identified and patched critical pre-launch vulnerabilities including a signature verification bypass and race conditions through a full adversarial security audit before alpha release.
Full-stack Web3 infrastructure for an Ethereum NFT community. Built the complete Carrot token economy: staking contracts, a peer-to-peer marketplace, auction house, vending machine, and trait transformation mechanics - all wired to real-time on-chain state. Every user interaction feeds back into the token circulation loop, creating durable daily return incentives.
Delivered as a contract engagement for LT3 / BTFD Rabbits. The platform continues to run on infrastructure I designed and built.
Took over development of a 555-piece Ethereum NFT collection and built it into a modular idle game ecosystem from the ground up. Designed and shipped: farming contracts, staking, combat progression, dynamic metadata with IPFS synchronization, breeding mechanics, trait-layer systems, holder utility (soft staking, trait shops, quest chains), and the FruitGem / Ephemeral NFT token economy.
The ecosystem was built with a plug-in architecture allowing new game modules to be added without breaking existing player state - critical for a live community with holders tracking their assets on-chain.
Specialized infrastructure. If you need any of these, I've already shipped a production version.
Server-authoritative game logic built on PHP + MySQL. Cron-driven game ticks, season lifecycle management, AP systems, leaderboards, shadow table atomic swaps. Designed to scale and run without admin babysitting.
End-to-end token systems with real retention math: emission curves, burn mechanics, staking multipliers, anti-whale guards. Smart contracts + off-chain state sync. Engineered to avoid the inflation death spiral.
Dynamic metadata, IPFS synchronization, trait mutation, breeding mechanics, rarity progression. On-chain / off-chain state management that doesn't break when you add new game layers.
ERC-721, ERC-20, staking vaults, harvest bridges, P2P marketplaces. Written in Solidity with adversarial security review. Deployed on Ethereum, Base, and ApeChain. On-chain addresses available for verification.
Adversarial review of existing Web3 systems. I've found and patched signature verification bypasses, race conditions, front-running vectors, and reentrancy gaps in production-bound systems before they went live.
Asynchronous game loops, offline catch-up mechanics, energy systems, quest chains, progression trees. LAMP stack with wallet-gated access and NFT-gated feature tiers. Runs on cheap hosting, scales with users.
I'm Chris Nwasike - a Lagos-based Web3 infrastructure engineer with 10+ years of full-stack experience and 3+ years building production blockchain products. I operate at the intersection most engineers avoid: Solidity for on-chain logic, PHP/MySQL for game servers, and real economic design that keeps users coming back.
I build retention systems- the staking engines, idle game loops, token economies, and engagement mechanics that separate a growing community from one that dies 30 days after mint. Everything I've shipped is still running. The receipts are on-chain.
I've written 10,000-NFT smart contracts from scratch, conducted adversarial security audits before major launches, and built the backend infrastructure for ecosystems on Ethereum, Base, and ApeChain. I work best with teams that are shipping something real and need an engineer who can own the entire backend stack.
Open to remote full-time roles and contract work. If you're building retention infrastructure, GameFi backends, staking systems, or token economies- let's talk.