Sam

Semen Kovalskyi Frontend developer
Phone: [open contact info](look above in the "contact info" section) Email: [open contact info](look above in the "contact info" section) Linkedin Telegram

SUMMARY
Frontend Developer with strong product mindset and 2.5 years experience building enterprise solutions. Proficient in React.js,
Redux, Next.js, Node.js, and TypeScript. Led system migrations, implemented document processing tools, and built
authentication systems. Adaptable team player who prioritizes user experience while meeting deadlines.

EXPERIENCE
Fullstack developer | (September 2024 - Present) | Incode group
Resolved 70+ critical UI/UX issues within a two-week sprint, enhancing overall user experience and product stability.
Architected and maintained full-stack codebases for 5 web applications, ensuring scalability and performance optimization.
Engineered custom web applications with seamless third-party software integrations, improving workflow efficiency and
expanding product capabilities.
Developed robust error handling and validation systems for user authentication processing workflows, ensuring reliability for
mission-critical operations across diverse file formats.
Frontend developer | (July 2023 - September 2024) | NDA
Leading the migration and upgrading process. Upgrade React to v18, implement Webpack 5, and migrate MUI from v0 to v5,
fixing dependencies and logic while ensuring performance and compatibility.
Implemented comprehensive macros functionality, enabling users to record, save, and automate up to 50+ different actions in
sequence, reducing repetitive tasks by 40% and improving user productivity.
Expanded auto-checking subtitles feature by adding 20+ new validation rules based on specific configurations, language-
specific preferences(rtl, Asia hieroglyphics), and 30+ regular expression patterns, for improving content quality.
Designed and implemented a comprehensive comparison tool for subtitle files with 18 distinct comparison parameters,
allowing users to identify differences across timing, text, formatting, and styles.
Frontend mentor (part-time) | (July 2023 - July 2024) | Mate academy
Video calls with screen sharing. Running tech checks to verify student’s knowledge.
Reviews of student’s homework.
Answering students' questions and unblocking them when they are stuck.
Fullstack developer | (January 2023 - July 2023) | Hivex
Participated in the creation of the project architecture from scratch, both server and client sides.
Built and deployed a secure authentication, authorization, and registration system from scratch, supporting multiple user roles
and enhancing application security and user accessibility.
Implemented a Chrome extension that parses tagged text within the browser to facilitate on-demand CV generation for
recruiting personnel.

SKILLS
Typescript, React.js, Next.js, Redux TK, React Query, Redux Saga, MUI, Antdesign, TailwindCSS;
Node.js, Express.js, NestJS, PostgreSQL, MongoDB, Prisma, Mongoose, SSE, Webhooks, Postman;
Git, Docker, ESlint, Prettier

EDUCATION
Fullstack course at Mate academy (2023)
Master's degree: Computer Science (2021 - 2023)
Bachelor degree: Computer Science (2017 - 2021)