Олександр

Oleksandr Raiko
Frontend Developer

[open contact info](look above in the "contact info" section) | [open contact info](look above in the "contact info" section) | Github | Linkedin

SUMMARY
Frontend Developer with 4+ years of commercial experience in the fintech industry, specializing in React and
Next.js. Progressed from maintaining legacy code to a full product migration to a modern tech stack.
Experienced in building UI components, integrating backend APIs, working with databases, and developing
internal tools to automate team processes. Also have hands-on experience with backend technologies and am
expanding my expertise toward full-stack development.

WORK EXPERIENCE
Frontend Developer
Forex Tester Software • 11/2021 — 01/2026

Legacy Project Migration to Modern Stack (from 04/2023):

• Migrated the website as part of a team to a modern stack: Next.js, Tailwind CSS, MySQL, DrizzleORM
• Built a custom admin panel for creating and editing template-based blocks: reduced typical task completion
time from ~3 days to a few hours, eliminating dependency on developers
• Designed and implemented UI component templates
• Planned and implemented A/B tests for individual UI components and different page structures to compare
user behavior and solution effectiveness
• Maintained and evolved the database schema via DrizzleORM
• Page performance optimization: achieved a ~1.5s load time reduction as part of a team (infrastructure and
stack upgrade)
• Onboarded a new team member
• Worked in a team following agile processes
Legacy Project Support and Development (11/2021 — 04/2023):

• Developed and maintained UI components using PHP, JS, Bootstrap
• Refactored and modernized legacy code
• Built responsive layouts (CSS, Sass), worked with the admin panel
• Integrated with backend APIs, handled data processing on the client side

SKILLS
Frontend: JavaScript, TypeScript, React.js, Next.js, HTML & CSS (Sass), Tailwind CSS, Zustand, React Hook
Form, Zod, TanStack Query, Framer Motion

Backend / Database: Node.js, NestJS, PHP, PostgreSQL, MySQL, Prisma, DrizzleORM, REST API

Tools: Git, Figma, Postman, Docker, AI tools

AI-assisted development: Claude Code, ChatGPT, GitHub Copilot - code generation, refactoring, debugging,
testing, and exploring new technologies.

EDUCATION
National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” — Computer Science
(incomplete higher education)
Gained a solid foundation in algorithms, mathematics, programming, and system architecture.