Automated ETFs & DeFi Yield on Solana
Co-founder. On-chain automated ETFs: deposit SOL, get exposure to an auto-rebalancing basket of tokens targeting stable, optimized returns. Pitched at the Colosseum Solana Hackathon.
Available for new projects
Hello, I'm Mustafa Zahid — Full-Stack Engineer specializing in AI systems & Web3.
— It's Mustafa, a Full-Stack & AI Engineer
- Python
- TypeScript
- Rust
- Solidity
- FastAPI
- Next.js
- React
- Node.js
- PostgreSQL
- Docker
- AWS Lambda
- Solana
- Ethereum
- RLHF
- LLM Evals
- Redis
- GitHub Actions
- React Native
2+
Years shipping production software
8+
Products built & launched
95%
DB load cut on millions of AI runs
80%
Infra cost reduction delivered
Selected work
Things I've built
From on-chain protocols and trading platforms to AI benchmarks used to evaluate frontier coding agents.
Centralized Trading Platform
A Binance-style exchange built for a client, backend sponsored by Bybit. Core serverless backend in Node.js, Express and AWS Lambda. Showcased at Token2049 Singapore.
Benchmark for AI Coding Agents
A public multi-language benchmark evaluating AI agents on real-world software-engineering tasks — leaderboard, trajectory analysis and eval pipelines.
AI Voice Interviewer
Real-time Voice Agent
Spoken mock interviews via a cascaded STT → LLM → TTS pipeline over LiveKit: Groq Whisper, Groq Llama and Kokoro TTS with a React + FastAPI stack.
On-chain Asset Marketplace
Revamped and revived the Kadena ecosystem for a Saudi client — a full marketplace for on-chain assets built on the Kadena blockchain.
Developer Challenge Platform
Developer dashboard and challenge platform for the Kadena ecosystem, created to drive better products to be built on-chain.
DeFi Smart Vaults
Smart-contract vault work for Trax Finance — ERC-4626 vaults on Berachain and Ethereum. The Solidity code remains public on GitHub.
Sniping Bot
On-chain Liquidity Watcher
A low-level watcher on Solana and Ethereum that detects new-token liquidity the moment it lands and surfaces an instant buy action — beating manual buys on timing and price.
Client feedback
What clients say
Every review below is from a verified client — and one of them was kind enough to say it on camera.
5.0Jan 2026
Senior Blockchain & Smart Contracts Developer — Solidity, DeFi & Web3
“Mustafa is an excellent Blockchain and Smart Contracts developer. He delivered secure, well-structured Solidity contracts, showed strong DeFi knowledge, and communicated clearly throughout the project. Very professional and reliable.”
5.0Feb 2026
Full Stack Developer
“It was a real pleasure collaborating with this freelancer. Communication was clear and easy throughout, tasks were handled with care, and everything was delivered in a professional and reliable way.”
5.0Dec 2025 — Jan 2026
Urgent Full Stack Developer for React.js & Node.js Bug Fixes
“Mustafa did an excellent job fixing urgent bugs in our React.js and Node.js application. He quickly understood the issues and provided effective, clean solutions. The work was completed on time.”
Experience
Where I've worked
Banking systems, AI startups, and everything in between — always close to the hard engineering problems.
AI Model Trainer
HabitatJan 2026 — Present- Training and evaluating large language models for leading AI labs including Anthropic and OpenAI.
- Contributing to fine-tuning, RLHF pipelines and code-generation benchmarking.
- Expert code review that feeds directly into model-training datasets.
Software Engineer · AI Contributor
AfterQuerySep 2025 — Present- Helped build and launch IDE-Bench, a public multi-language benchmark for evaluating AI coding agents on real software-engineering tasks.
- Contributed to Harbor and Terminal Bench — internal tooling powering AfterQuery's AI evaluation infrastructure.
- Worked on benchmark design, evaluation pipelines and data-quality processes behind the IDE-Bench leaderboard.
Software Engineer
FreelanceMar 2025 — Present- Built the core backend for MarketX Pro, a Binance-style trading platform showcased at Token2049 Singapore (Node.js, Express, AWS Lambda).
- Shipped Solidity smart contracts at Dechains — ERC-4626 vaults and auto-compounding staking with external protocol integrations.
- Cut MongoDB infrastructure costs ~80% through connection pooling, query optimization and indexing.
Software Development Engineer
SYCHSep 2024 — Mar 2025- Architected scalable FastAPI microservices under an ex-Amazon tech lead, using the Unit of Work pattern across AI processing pipelines.
- Designed a distributed counting system handling millions of prediction runs — 95% less database load via cron optimization and PostgreSQL partitioning.
- Dockerized services, built Next.js/React UIs, and automated CI/CD with GitHub Actions (90% fewer deployment errors).
Software Engineer
Habib Bank AG ZurichApr 2024 — Sep 2024- Optimized the credit-card module of a core banking system in Java, resolving critical performance bottlenecks.
- Improved transaction-processing speed by ~25%.
Toolbox
Skills & technologies
Languages
PythonTypeScriptRustSolidityJavaGoC/C++SQL
Backend & Infra
FastAPINode.jsExpressPostgreSQLRedisMongoDBDockerAWS LambdaGitHub Actions
Frontend & Mobile
Next.jsReactReact NativeVite
Web3
Anchor (Solana)EVM / SolidityERC-4626 VaultsKadena
AI & Automation
RLHF PipelinesLLM EvalsLiveKit Agentsn8n / Make
Testing
PytestJestPlaywright
Contact
Let's build something
worth shipping.
I'm open to freelance projects, contract work and interesting full-time roles. Tell me what you're building — I usually reply within a day.
Karachi, Pakistan · Working worldwide, remote-first