Daniil Kostanda
Hi, I’m Kostan Danil, a backend and full‑stack developer with a passion for building scalable, reliable web applications.
About
Hi, I’m Kostan Danil, a backend and full‑stack developer with a passion for building scalable, reliable web applications. I enjoy designing robust APIs, integrating real-time data, and delivering clean, maintainable code. I thrive in collaborative teams and like turning complex ideas into practical software solutions that users love.
Outside work, I enjoy learning new technologies, writing tests, and improving development processes. I’m always ready to contribute to open source and help teams ship high-quality software.
- Joined February 2026
Languages
- EnglishFluent
- UkrainianAdvanced
Industry experience
- Software & Internet
- Computers & Electronics
- Professional Services
Work experience
Led the development of a Trello-like task management app and a cryptocurrency portfolio tracker. Built high-performance REST APIs using Node.js, NestJS, TypeORM and MySQL; implemented JWT and Google OAuth2 authentication; added Swagger docs, Docker-based deployment, and data validation with class-validator. Implemented nodemailer for email notifications, enforced code quality with ESLint/Prettier, and introduced Redis caching and rate limiting. Consolidated frontend integration with React through reusable components, improving user engagement and reliability.
Education
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