I am a TypeScript Software Engineer with 5+ years of experience building scalable, high-performance web applications using React, Next.js, Node, and Nest. I focus on clean architecture, performance optimization, and maintainable code. I excel at delivering end-to-end features and mentoring junior developers in Agile teams, collaborating with product managers, designers, and back-end engineers to ship high-quality software.

Serghei Efremov

I am a TypeScript Software Engineer with 5+ years of experience building scalable, high-performance web applications using React, Next.js, Node, and Nest. I focus on clean architecture, performance optimization, and maintainable code. I excel at delivering end-to-end features and mentoring junior developers in Agile teams, collaborating with product managers, designers, and back-end engineers to ship high-quality software.

Available to hire

I am a TypeScript Software Engineer with 5+ years of experience building scalable, high-performance web applications using React, Next.js, Node, and Nest. I focus on clean architecture, performance optimization, and maintainable code.

I excel at delivering end-to-end features and mentoring junior developers in Agile teams, collaborating with product managers, designers, and back-end engineers to ship high-quality software.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
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Language

Romanian, Moldavian, Moldovan
Fluent
Russian
Advanced
English
Intermediate
French
Beginner

Work Experience

Front End Developer at XSoft Tech
July 1, 2022 - November 1, 2025
Built responsive, user-focused interfaces using React and modern JavaScript with reusable component patterns. Collaborated with designers and UX teams to transform wireframes and requirements into polished, pixel-perfect UIs. Integrated front-end features with RESTful APIs, ensuring seamless communication with back-end services. Used PHP, Laravel, and CodeIgniter on the back end to support front-end functionality. Improved application performance through code optimization, refactoring, and best practices. Debugged issues across front-end and back-end layers and participated in code reviews to ensure clean, scalable code.
Full Stack Developer at DevTactics
April 1, 2020 - March 1, 2022
Developed and maintained back-end functionality using PHP, Laravel, and CodeIgniter. Translated UI/UX designs into responsive, high-quality front-end implementations. Worked on client projects including TestRail, Assembla, Gurock Admin Panel, Mainlinemenswear admin panel, MMW CMS, and WRS Health EHR systems. Collaborated in an Agile environment with product managers, designers, and back-end teams to deliver features and fix production issues.

Education

Bachelor of Science: Automation and Computer Science at Technical University of Moldova – Chisinau, Moldova
September 1, 2016 - June 1, 2020
High School Diploma at Liceul Teoretic Ioan Sârbu
September 1, 2004 - June 1, 2016

Qualifications

JavaScript - The Complete Guide 2025
January 11, 2030 - January 20, 2026
React - The Complete Guide 2025
January 11, 2030 - January 20, 2026
NestJS: The Complete Developer's Guide
January 11, 2030 - January 20, 2026

Industry Experience

Software & Internet, Media & Entertainment