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Hi, I’m Sergei Ivanov. I’m a full-stack developer with 9+ years of experience building scalable front-end and back-end web applications. I focus on UI/UX-driven design, clean architecture, and responsive interfaces that deliver measurable improvements in engagement and accessibility across multiple industries. I’m based in Bali, Indonesia, and I enjoy collaborating across disciplines to turn complex problems into elegant solutions. I continuously explore new technologies and best practices to drive product quality and business growth for clients and teams alike.…Hi, I’m Sergei Ivanov. I’m a full-stack developer with 9+ years of experience building scalable front-end and back-end web applications. I focus on UI/UX-driven design, clean architecture, and responsive interfaces that deliver measurable improvements in engagement and accessibility across multiple industries. I’m based in Bali, Indonesia, and I enjoy collaborating across disciplines to turn complex problems into elegant solutions. I continuously explore new technologies and best practices to drive product quality and business growth for clients and teams alike.

Sergei Ivanov

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

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Hi, I’m Sergei Ivanov. I’m a full-stack developer with 9+ years of experience building scalable front-end and back-end web applications. I focus on UI/UX-driven design, clean architecture, and responsive interfaces that deliver measurable improvements in engagement and accessibility across multiple industries. I’m based in Bali, Indonesia, and I enjoy collaborating across disciplines to turn complex problems into elegant solutions. I continuously explore new technologies and best practices to drive product quality and business growth for clients and teams alike.…Hi, I’m Sergei Ivanov. I’m a full-stack developer with 9+ years of experience building scalable front-end and back-end web applications. I focus on UI/UX-driven design, clean architecture, and responsive interfaces that deliver measurable improvements in engagement and accessibility across multiple industries. I’m based in Bali, Indonesia, and I enjoy collaborating across disciplines to turn complex problems into elegant solutions. I continuously explore new technologies and best practices to drive product quality and business growth for clients and teams alike.

Available to hire

Hi, I’m Sergei Ivanov. I’m a full-stack developer with 9+ years of experience building scalable front-end and back-end web applications. I focus on UI/UX-driven design, clean architecture, and responsive interfaces that deliver measurable improvements in engagement and accessibility across multiple industries.

I’m based in Bali, Indonesia, and I enjoy collaborating across disciplines to turn complex problems into elegant solutions. I continuously explore new technologies and best practices to drive product quality and business growth for clients and teams alike.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

Russian

Fluent

English

Fluent

Indonesian

Beginner

Work Experience

Front-End Developer at Future Web App

March 1, 2024 - November 15, 2025

Hybrid front-end developer building PWAs and web apps using TypeScript, React.js, Node.js, MongoDB and Vercel; improved user engagement and accessibility through UI/UX-focused design across multiple industries.

Front-End Developer at Engage Squared

March 1, 2024 - March 1, 2024

Hybrid developer optimizing PWAs with TypeScript, React.js, Node.js, Express.js and Azure; implemented modern UI and data-management tooling (Costing Sheet UI), driving client growth and automation; internal efficiency up by 30%.

Front-End Developer at Mad AppGang

May 1, 2023 - May 1, 2023

Remote built several web apps with TypeScript, React.js, TanStack, Tailwind CSS and Vite; improved client satisfaction by 20% and enhanced company reputation through front-end, responsive UI across desktop/tablet/mobile.

Front-End Developer at Nova Press

February 1, 2020 - February 1, 2020

Remote developed B2B SaaS web app with TypeScript, Angular and SCSS Modules; focused on UI/UX, performance, SEO, and refactoring legacy code; delivered automation and stability gains.

Front-End Developer at SUN*

July 1, 2017 - July 1, 2017

On-site built responsive web apps with JavaScript, TypeScript, React.js, Angular.js and CSS Libraries for Japanese clients; focused on UI/UX, accessibility, and quality testing; led team collaboration and workflow optimization.

Full-Stack Developer at Future Web App

March 1, 2024 - November 15, 2025

Freelance development of Progressive Web Apps and web apps using TypeScript, React.js, Node.js, MongoDB and Vercel, focusing on UI/UX-driven design to boost user engagement and accessibility across diverse industries.

Full-Stack Developer at Engage Squared

March 1, 2024 - March 1, 2024

Hybrid development and optimization of PWAs using TypeScript, React.js, Node.js, Express.js and Azure; improved internal efficiency by 30% and delivered a modern UI for a costing-sheet app, driving client growth and revenue through automation.