Martijn van Halen
Seasoned Full-Stack Engineer & Technical Founder in Fintech, Mobile Apps, Cloud, and Crypto/Web3
English | Dutch | Spanish
Summary
I am a full-stack engineer and technical founder with over 20 years of experience in fintech, mobile apps, cloud computing, and crypto/Web3. I have built products and services from the ground up, creating viable businesses that scaled to acquisitions (e.g., Payvision, sold for $200M) and startups that secured venture capital ($500K). My expertise spans developing minimum viable products, achieving product-market fit, and driving growth to millions of users, subscriptions, and transactions. Never failed a project.
Experience
NFTz INC
Social NFT marketplaces on DeSo and Polygon
CTO, Full Stack Developer, Co-founder - Dec 2021 - Present
- Responsible for all technical aspects and development
- Raised $500K and additional community funds
- Developed social NFT marketplaces (nftz.me, orna.art)
- Created InterSocial mobile app for iOS and Android
- Set up data flows and smart contracts on Polygon
- Created scalable audio spaces for web and mobile
- Added advanced staking and monetization features
Expertise
Building iOS and Android apps using Flutter.
- Developed InterSocial mobile app
- Created mobile app generator for iGenApps
- Implemented mobile first PWAs
- Setup a native preview app CI pipeline
Proficient in cloud infrastructure with Azure, Google Cloud, and Vercel.
- Deployed scalable apps for NFTz and iGenApps
- Utilized BigQuery for analytics
Leveraged AI to build innovative services.
- Created AI powered chatbot for this site
- Integrated OpenAI embeddings
- Working on RoomsAI Multi tenant AI powered chat rooms
- Coding with Co Pilot, Grok and OpenAI
Skilled in DevOps with Azure, GitHub and Docker.
- Implemented Docker for microservices
- Used RabbitMQ for queuing
- Used Redis Cache and cron jobs for caching
- Set up GitHub Actions for flows
Get in Touch
I'm available for technical co-founder roles, full stack engineering, mobile app development or (fractional) CTO. Interested in collaborating or discussing a project or role? Reach out!