SE

Serghei Efremov

Available to hire

js, Node, and Nest. I focus on clean architecture, performance optimization, and maintainable code.

About

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.

  • 5 years' experience
  • Joined January 2026

Languages

  • Romanian, Moldavian, MoldovanFluent
  • RussianAdvanced
  • EnglishIntermediate
  • FrenchBeginner

Industry experience

  • Software & Internet
  • Media & Entertainment

More experts in Chisinau, Moldova

Work experience

Front End Developer · XSoft TechJul 2022 – Nov 2025 · 3 yrs 5 mos

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 · DevTacticsApr 2020 – Mar 2022 · 2 yrs

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 · Technical University of Moldova – Chisinau, Moldova2016 – 2020
High School Diploma · Liceul Teoretic Ioan Sârbu2004 – 2016

Certifications and awards

JavaScript - The Complete Guide 20252030 – 2026
React - The Complete Guide 20252030 – 2026
NestJS: The Complete Developer's Guide2030 – 2026

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