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Hi, I'm Sergei, a Frontend / Full-Stack Developer with over 10 years of experience in JavaScript and React. I've spent several years in senior development roles, crafting high-quality web interfaces and integrating AI tools to improve developer workflows and enhance user experience. I enjoy solving complex UI/UX challenges and building interactive business applications. I'm passionate about exploring AI integration in frontend development and actively experiment with cutting-edge tools like GitHub Copilot and TensorFlow.js. Based in Coimbra, Portugal, I continuously seek innovative ways to combine technology and creativity to deliver impactful software solutions.…Hi, I'm Sergei, a Frontend / Full-Stack Developer with over 10 years of experience in JavaScript and React. I've spent several years in senior development roles, crafting high-quality web interfaces and integrating AI tools to improve developer workflows and enhance user experience. I enjoy solving complex UI/UX challenges and building interactive business applications. I'm passionate about exploring AI integration in frontend development and actively experiment with cutting-edge tools like GitHub Copilot and TensorFlow.js. Based in Coimbra, Portugal, I continuously seek innovative ways to combine technology and creativity to deliver impactful software solutions.

Sergei Nikonets

Full Stack Developer, Front-End Developer, Web Developer, +2

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Hi, I'm Sergei, a Frontend / Full-Stack Developer with over 10 years of experience in JavaScript and React. I've spent several years in senior development roles, crafting high-quality web interfaces and integrating AI tools to improve developer workflows and enhance user experience. I enjoy solving complex UI/UX challenges and building interactive business applications. I'm passionate about exploring AI integration in frontend development and actively experiment with cutting-edge tools like GitHub Copilot and TensorFlow.js. Based in Coimbra, Portugal, I continuously seek innovative ways to combine technology and creativity to deliver impactful software solutions.…Hi, I'm Sergei, a Frontend / Full-Stack Developer with over 10 years of experience in JavaScript and React. I've spent several years in senior development roles, crafting high-quality web interfaces and integrating AI tools to improve developer workflows and enhance user experience. I enjoy solving complex UI/UX challenges and building interactive business applications. I'm passionate about exploring AI integration in frontend development and actively experiment with cutting-edge tools like GitHub Copilot and TensorFlow.js. Based in Coimbra, Portugal, I continuously seek innovative ways to combine technology and creativity to deliver impactful software solutions.

Available to hire

Hi, I’m Sergei, a Frontend / Full-Stack Developer with over 10 years of experience in JavaScript and React. I’ve spent several years in senior development roles, crafting high-quality web interfaces and integrating AI tools to improve developer workflows and enhance user experience. I enjoy solving complex UI/UX challenges and building interactive business applications.

I’m passionate about exploring AI integration in frontend development and actively experiment with cutting-edge tools like GitHub Copilot and TensorFlow.js. Based in Coimbra, Portugal, I continuously seek innovative ways to combine technology and creativity to deliver impactful software solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Fluent

Russian

Fluent

German

Beginner

Portuguese

Beginner

Work Experience

Senior Frontend Developer at DSR Corporation

April 1, 2024 - November 30, 2024

Delivered major feature enhancements and UI reworks for a Justice Technology document protection platform, improving usability. Developed plugins for Atlassian Jira and Confluence including IOTA Copy and BPMN Editor with multiple custom modules. Integrated AI-assisted development tools like Cursor and GitHub Copilot into workflow to boost productivity and code quality.

Senior Frontend Developer at Capgemini Engineering Portugal

June 1, 2022 - December 31, 2023

Developed new features for ASML’s quality control platform, displaying additional metrics for silicon wafer production and implemented UI improvements enhancing data readability and UX. Mentored junior developers and supported knowledge sharing.

Senior Frontend Developer at Sberbank

October 1, 2019 - May 31, 2022

Built a custom warranty issuance module for individual entrepreneurs and contributed features to a tax refunding application for individual entrepreneurs. Conducted over 10 technical interviews and mentored junior developers.

Lead Frontend Developer at Logrocon

June 1, 2017 - September 30, 2019

Designed and developed an application management system for VTB Bank. Built a discount management platform “Edinaya Skidka” and maintained features for a city traffic control automation system.

Frontend Developer at United company of Afisha and Rambler

April 1, 2014 - May 31, 2017

Delivered over 40 special news projects including interactive infographics, long reads, and web-based quizzes.

Frontend Developer/Flash technologist at RIA News

April 1, 2010 - March 31, 2014

Developed more than 60 data-driven infographics, news specials, long reads, quizzes, and mini-games for major editorial campaigns. Worked primarily with Adobe Flash and JavaScript technologies.