Andreas Billy SutandiSenior Frontend Engineer
Senior frontend engineer with 8+ years shipping React & Next.js products end-to-end — from pixel-perfect UI to the Java/Spring backends behind them.
About
I'm a frontend-focused fullstack engineer based in Indonesia. I care about the details that users feel but rarely notice: sub-second loads, buttery interactions, and interfaces that work for everyone. I've delivered 50+ projects and led the frontend for a travel-insurance platform used by thousands.
I'm Andreas Billy Sutandi, a Senior Frontend Engineer based in Bogor, Indonesia with over 8 years of professional experience. I specialize in React, Next.js, TypeScript and React Native, backed by solid Java/Spring Boot experience that lets me own features across the full stack. At ATI Business Group I lead frontend architecture for enterprise travel and insurance products, where I introduced reusable component systems, improved Core Web Vitals, and mentored junior engineers. I'm the kind of engineer who reads the spec, questions it, and ships something better — with clean code, scalable architecture, and a relentless focus on user experience. Outside of code, I'm a musician (piano and violin), which keeps my sense of rhythm and structure sharp.
- 8+ years building for the web
- Bogor, Indonesia (UTC+7) · open to remote
- Musician — piano & violin
“Andreas owns the frontend end-to-end. He turned a vague brief into a polished, fast product and made the whole team faster with the component library he built.”
“Rare combination of design sensibility and deep technical chops. Our Core Web Vitals went green and stayed green after he joined.”
Experience
A timeline of roles where I've shipped real products for real users.
Senior Frontend Engineer (Fullstack) @ ATI Business Group
2018 — PresentBogor, Indonesia (Hybrid)
Lead frontend engineering for enterprise travel & insurance products, owning everything from the React/Next.js UI to the Java/Spring Boot services behind it.
- Led the frontend for Amanyaman, a travel-insurance platform, contributing to a 60% increase in user engagement.
- Built a reusable component library and design system that cut new-feature delivery time by ~30%.
- Improved Core Web Vitals to all-green by code-splitting, image optimization, and rendering strategy changes.
- Mentored junior engineers and established code review + accessibility standards for the team.
ReactNext.jsTypeScriptReduxJavaSpring BootPostgreSQLFrontend Engineer & Consultant @ Independent / Freelance
2016 — PresentRemote
Partner with startups and agencies to ship polished marketing sites and web apps with React, Next.js, and Tailwind — over 50 projects delivered.
- Delivered 50+ client projects ranging from landing pages to full web apps.
- Built modern Next.js apps using Server Actions, infinite scroll, and Framer Motion.
- Specialized in turning Figma designs into pixel-accurate, accessible interfaces.
Next.jsReactTypeScriptTailwind CSSFramer Motionshadcn/ui
Selected Projects
Each card opens a full case study: the problem, my solution, the stack, and measurable results.
Amanyaman — Travel Insurance Platform
Buying and claiming travel insurance online was slow and confusing. The legacy flow had a high drop-off rate and an internal claims tool that was painful to use.
→ 60% increase in user engagement after the redesign
Anime Banks — Next.js 14 Catalog
I wanted a hands-on reference implementation of the newest Next.js App Router features — Server Actions, server-side data fetching, and smooth motion — in a single cohesive app.
→ Zero client-side data-fetching libraries — pure RSC + Server Actions
Real Estate AI
Real-estate listing UIs are repetitive to build. I wanted to explore how much of the UI scaffolding could be generated and then refined by hand for production.
→ Demonstrated an AI-assisted design-to-code workflow
Nike Landing Page
A focused exercise in marketing-grade visual polish: recreate a premium product landing page with perfect responsiveness and typography.
→ Pixel-accurate, fully responsive layout
Skills & Toolkit
Grouped by how I actually use them — with an honest sense of depth, not just logos.
Frontend
Building interfaces that are fast, accessible, and a joy to use.
- React
- Next.js (App Router)
- TypeScript
- React Native
- Tailwind CSS
- Framer Motion
- Angular
Architecture & Performance
Design systems, RSC, Core Web Vitals, and maintainable codebases.
- React Server Components
- Design Systems
- Web Performance / CWV
- Accessibility (WCAG)
- Testing
Backend & Data
Comfortable owning the API and data layer behind the UI.
- Node.js
- Java / Spring Boot
- REST APIs
- PostgreSQL
- MongoDB
Tooling & Workflow
The day-to-day toolkit for shipping reliably with a team.
- Git / GitHub
- Figma
- CI/CD
- Vercel
- Agile / Scrum
Let’s build something
Open to senior frontend roles & select freelance work. Drop a message — I read every one.