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Sergey Stepanov
@sergey_stepi
Senior Full Stack Developer React TypeScript NodeJS
Argentina
English
About me
I’m a Lead Full Stack Developer with 17+ years of experience building complex and scalable web products. I specialize in React, TypeScript, JavaScript and Node.js, with deep expertise in frontend development, architecture, API integrations and performance optimization. I’ve built high-load platforms, real-time systems, analytics, logistics and SaaS products, led development teams and modernized large applications. I focus on scalable architecture, performance and maintainable code.
Skills
Sergey Stepanov
Offline •
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I will build a react and nodejs web application
Portfolio
Work experience
Senior Web Developer
Wubai • Part-time
May 2025 - Present • 1 yr 4 mos
Developed a Telegram-based community platform combining listings, referral systems, user forms, chats and community functionality. Built backend logic, user flows and integrations using JavaScript and Node.js. Worked on bot architecture, API integrations and interconnected features within a single Telegram environment.
Senior Web Developer
Guru Group • Full-time
Feb 2024 - Dec 2025 • 1 yr 10 mos
Developed a modern web platform for a premium travel agency in Mendoza. Built responsive interfaces, service pages and user flows for wine tours, Andes trips, hotels, transfers and personalized travel experiences. Worked on frontend structure, navigation, performance and usability across different devices.
Team Lead Frontend Developer
Movers Escargot • Full-time
Sep 2023 - Aug 2025 • 1 yr 11 mos
Led frontend development for a logistics platform and built the frontend team from scratch. Established code review, automated testing and CI/CD processes. Developed real-time truck tracking, route optimization and logistics management interfaces. Improved development speed by 30% and contributed to route optimization that reduced delivery costs by up to 20%.
