Oleh

OLEH HAVRYLIUK
Junior Go Developer | Backend | REST API

[відкрити контакти](див. вище в блоці «контактна інформація») | [відкрити контакти](див. вище в блоці «контактна інформація») | GitHub : http://github.com/OlehHawryliuk
| LinkedIn : [відкрити контакти](див. вище в блоці «контактна інформація»)

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PROFESSIONAL SUMMARY

Backend developer with strong foundation in Go and relational databases. Experienced in
building scalable REST APIs, implementing secure authentication, and integrating third-party
services. Passionate about clean code and modern backend architecture.

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TECHNICAL SKILLS

- Languages & Frameworks: Go, SQL, PostgreSQL, SQLite

- Web Technologies: REST API design and implementation, HTTP protocols and methods,
JSON encoding/decoding

- DevOps & Tools: Docker, Kubernetes, Git, Github

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PROJECTS

CHIRPY - REST API Backend Service

github.com/OlehHawryliuk/chirpy

- Built production-ready REST API in Go
- JWT authentication with access & refresh tokens, bcrypt password hashing
- User registration, chirp creation, premium subscription management
- PostgreSQL with sqlc for type-safe query generation
- Polka webhook integration for payment processing
- Secure token revocation, API key validation, error handling
- Fully Dockerized with docker-compose
Tech Stack: Go, PostgreSQL, JWT, bcrypt, Docker, Polka webhooks

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EDUCATION

- Bachelor's Degree in Applied Mathematics
National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute»
Program: Data Science and Mathematical Modeling

- Boot.dev Courses

- Mate academy Courses

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LANGUAGES

- English: B2
- Ukrainian: Native
- Polish: Basic