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

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.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
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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.

Education

Engineer-Technologist at Bauman Moscow State Technical University
January 1, 1997 - December 31, 2003

Qualifications

Performance Management for Functional Teams
January 1, 2018 - December 31, 2018
Unity 3D – Basic Course
January 1, 2013 - December 31, 2013
JavaScript Advanced Course
January 1, 2012 - December 31, 2012
Fundamentals of Design
January 1, 2005 - December 31, 2005
Design Technology
January 1, 2005 - December 31, 2005

Industry Experience

Software & Internet, Financial Services, Media & Entertainment, Professional Services, Government

Experience Level

Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
See more