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Krystian Dębek
Mid Back-end Engineer @Jellyfish
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WORK HISTORY
Mid Back-end Engineer @Jellyfish
Warsaw, PL
Contribute to the design and development of solution architecture to meet business needs.* Perform back-end development tasks and implement components following modern software development standards.* Assist in developing and reviewing feature design documents, providing input and updates to specifications.* Identify areas for refactoring to enhance performance, scalability, availability, reliability, and security.* Collaborate in creating an architecture vision that addresses key requirements, supporting trade-off analysis, proof of concept, and benchmarking.* Design and implement a variety of test types, including unit, integration, and functional tests.* Follow technical standards, best practices, policies, and procedures in software development.* Participate in code reviews, peer programming, and contribute to improving team and product quality.* Participate in sprint planning, refinement sessions, and contribute to estimation and long-term planning.* Assist Product Owners and Business Analysts in requirement discussions, identifying technical constraints or opportunities.* Involve in peer reviews to maintain code, architecture, and performance quality standards.* Apply agile delivery practices, particularly Agile SCRUM, within the development team.* Support the ongoing development and enhancement of technology platforms and products.
EDUCATION
Polish-Japanese Academy of Information Technology
Bachelor of Engineering - BE, Computer Science
ABOUT KRYSTIAN DĘBEK
Backend software engineer (PHP/Laravel/Symfony, C#/.NET, Python/FastAPI) with 4+ years of building scalable APIs and event-driven services. Strong in SQL/NoSQL, Docker, CI/CD, and cloud (AWS/GCP). Improved uptime, performance, and revenue in high-traffic systems.
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