Teo Constant
Full-Stack Engineer | Fast MVPs & Startup Execution
Salary / Daily rate
Toulouse, France
Freelance, open to permanent contract
Skills
About me
Intro
I specialize in fast execution for startups: MVPs, critical features, and production-ready code. Freelance full-stack engineer with 5+ years of experience. Ex-startup fintech (Mobula.io). I help startups and founders: build MVPs fast, ship and scale production features, fix and improve existing codebases. I'm comfortable owning features end-to-end: frontend, backend, APIs, database, infra. Available for freelance missions.
Work experience
Développeur Full Stack
Mobula Labs
Sep 2023 - Feb 2026
2 years 6 months
Toulouse, France
– Developed multiple wallet endpoints returning portfolio balances, swaps, and transfers data – Reduced wallet endpoint latency by up to 10x through performance optimizations and critical path refactoring – Built a real-time blockchain ingestion system parsing blocks (EVM & SVM) to extract transfers and ingest them into the database – Implemented an internal RPC load balancer to distribute and optimize node requests – Designed a real-time QA system comparing indexed data with RPC sources and reprocessing faulty blocks via RabbitMQ when inconsistencies were detected
Ingénieur Full Stack
Staysafu
Jan 2023 - Sep 2023
9 months
Toulouse, France
– Contributed to a token security scanner generating risk scores based on smart contract and on-chain analysis – Implemented automated checks to detect common scam patterns (malicious contract logic, ownership concentration, supply control) – Built holder distribution analysis to flag high-risk tokens (e.g., extreme supply concentration)
Ingénieur Full Stack
Safetin
Jan 2023 - Sep 2023
9 months
Toulouse, France
– Built a full NFT marketplace including smart contract integration and backend infrastructure – Developed a Telegram bot that analyzes wallet holdings using AI to generate behavioral and investor profiles – Created a Telegram bot providing token analytics (name, symbol, market cap, 24h price change, and social metrics) – Developed and deployed custom token and staking smart contracts – Contributed to project architecture, implementation, testing, CI/CD, and production deployments