Harun Isik
Full Stack Developer @WSD
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WORK HISTORY
Full Stack Developer @WSD
London, GB
Designed and developed WSD web services, enabling efficient browsing of financial instruments and downloading of Key Information Document (KID) of structured products.• Built and maintained Java backend APIs, integrated seamlessly with SQL/NoSQL databases and front-end clients.• Created React UI components from Figma designs and wireframes, ensuring responsive and user-friendly interfaces.• Enhanced code quality through unit and integration testing using Junit, Jest and React Testing Library.• Conducted code reviews, pair programming, and automated testing to maintain high development standards.• Refactored code to enhance performance, adhere to SOLID and Clean Code principles, and address technical debts.• Analyzed and mitigated API vulnerabilities highlighted by penetration tests (OWASP), including: Input validation, authentication, and authorization, SQL injection, XSS and CSRF attacks, session management, cryptographic practices, and secure coding.• Utilized OpenAPI (Swagger) for API documentation and implemented contract-first development approaches.• Applied DevOps best practices, including CI/CD pipelines and Docker containerization, to ensure reliable deployments.• Collaborated in Agile environments, participating actively in sprint planning, retrospectives, and backlog refinements.
EDUCATION
Anadolu University
Bachelor's degree, Computer Engineering
Bahcesehir University
Master's degree, Computer Engineering
ABOUT HARUN ISIK
Highly experienced Senior Full Stack Developer with 14+ years in software development, specializing in designing, developing, and delivering scalable backend and frontend web applications. Proficient in the entire Software Development Life Cycle (SDLC) with a strong focus on Agile methodologies and DevOps practices. Skilled in leading technical teams, resolving complex software architecture challenges, and adhering to Clean Code and SOLID principles. A strong advocate of quality-driven development practices, including Test-Driven Development (TDD) and Behavior-Driven Development (BDD).
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