Software Engineer · Fintech · Crypto
Engineer by craft, entrepreneur by intent.
I work at the intersection of engineering, finance, and product.
My focus is on building scalable backend systems — especially in fintech and crypto — while also being capable of delivering end-to-end products, including frontend and mobile applications.
Alongside my professional work, I’m actively building and experimenting with my own products, with the long-term goal of entrepreneurship.
- Backend-heavy systems with Python & Django
- Frontend and mobile applications when product ownership requires it
- Crypto & fintech infrastructure (custody, wallets, transaction flows)
- Blockchain integrations & on-chain/off-chain systems
- Internal tools that support real money, real users, and real risk
- Designing clean architectures for complex business logic
Backend
- Python, Django
- PostgreSQL, Redis
Frontend & Mobile
- JavaScript, React
- Mobile application development (cross-platform & native when needed)
- API-driven UI design
Blockchain / Fintech
- Ethereum & EVM-based networks
- Wallet & custody concepts
- Transaction lifecycle design
- Security- and compliance-aware system design
Other
- REST APIs
- System architecture & data modeling
- Production debugging & reliability
- Building scalable fintech backends
- Shipping end-to-end products
- Improving system clarity and reliability
- Turning ideas into real, usable products
- 🌐 Website: https://yusufsina.com
- 💼 LinkedIn: https://www.linkedin.com/in/yusufsina
- 🐦 X (Twitter): https://x.com/0xyusufsina
- 📫 Email: yusufsinayildiz@gmail.com
I value clarity over complexity, systems over shortcuts,
and products that work over products that only look good.