Full-Stack JavaScript EngineerAvailable for ProjectsReact • Next.js • Node.js • TypeScript • GolangFull-Stack JavaScript EngineerAvailable for ProjectsReact • Next.js • Node.js • TypeScript • GolangFull-Stack JavaScript EngineerAvailable for ProjectsReact • Next.js • Node.js • TypeScript • Golang

Services

Transform ideas into scalable, production-ready applications across web and mobile.

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Our way of thinking

Principles that guide how I approach development, collaboration, and shipping production-ready software.

Scalable & production-ready

Build applications that grow with you. Clean architecture, RESTful APIs, and proper database design from day one.

Real-time & modern stack

Socket.IO, GraphQL, and real-time features. React, Next.js, Node.js, Golang—tools that ship fast and scale.

Full-stack ownership

From database design to deployment. I own the full stack—frontend, backend, APIs—so you get a cohesive, maintainable system.

Async-first collaboration

Work independently, ship on time. Clear communication via Slack, GitHub, and async updates—no hand-holding needed.

2+ years

Building scalable web and mobile applications.

10+ projects

Delivered across real-time chat, e-commerce, social apps & more.

3–5 concurrent

Active clients supported with full-stack development.

Surabaya-based

Remote-first, async collaboration with global teams.

How we help you grow

I build across web and mobile—real-time chat, e-commerce, social apps, B2B SaaS, and more.

From APIs to full-stack applications, clean architecture and modern tooling deliver results that scale.

Frontend Development
  • React & Next.js applications
  • Responsive design & mobile-first
  • Tailwind CSS & modern UI
  • Performance optimization & SEO
  • Progressive Web Apps (PWA)
Backend Development
  • RESTful APIs & GraphQL servers
  • PostgreSQL, MongoDB database design
  • Authentication & authorization
  • Real-time features with Socket.IO
  • Cloud deployment & scaling
Mobile Development
  • Cross-platform React Native apps
  • Native performance & UX
  • App Store & Play Store deployment
  • Push notifications & offline support
  • Social features & real-time chat

Kind words from clients

"Start Agency transformed our scattered ideas into a coherent, beautiful product. The speed of delivery was unmatched compared to other agencies we've tried."

Sarah Chen
Sarah Chen
CTO, FinFlow

"We needed a complete rebrand in 3 weeks for our Series A pitch. They not only met the deadline but exceeded expectations on quality."

Mark Davis
Mark Davis
CEO, TechCore

"The subscription model is a game changer. No scope creep, no negotiation, just pure design work delivered consistently."

Elena Rodriguez
Elena Rodriguez
Product Lead, SaaSy

"Finally, a design partner that understands developer constraints. The handoffs were clean, organized, and ready to code."

James Kim
James Kim
CTO, BlockSpace

"Start Agency transformed our scattered ideas into a coherent, beautiful product. The speed of delivery was unmatched compared to other agencies we've tried."

Sarah Chen
Sarah Chen
CTO, FinFlow

"We needed a complete rebrand in 3 weeks for our Series A pitch. They not only met the deadline but exceeded expectations on quality."

Mark Davis
Mark Davis
CEO, TechCore

"The subscription model is a game changer. No scope creep, no negotiation, just pure design work delivered consistently."

Elena Rodriguez
Elena Rodriguez
Product Lead, SaaSy

"Finally, a design partner that understands developer constraints. The handoffs were clean, organized, and ready to code."

James Kim
James Kim
CTO, BlockSpace