CHRISTOPHER YU
EMAIL ME
THE ENGINEER BEHIND THE SYSTEMS

One engineer,responsible end to end.

I can lead a project from design to launch or work alongside your existing team. In either case, you work directly with the person designing and building the software.

BASED
Bali · UTC+8
OVERLAP
Agreed before we start
EXPERIENCE
5 years in production
STATUS
Available now
01  BACKGROUND
Christopher Yu
C. YU / BALIFIG. 01

I studied computer science and have spent five years shipping production software: a year at a blockchain company, three at a fintech and a year at a digital agency.

That experience shapes how I work: pay attention to data accuracy, make delivery decisions early and leave the next engineer a system they can understand.

Before that, I competed in capture-the-flag (CTF) security challenges. Looking for ways software can fail taught me to consider access permissions and input validation throughout the build.

02  HOW I WORK

Direct communication, clear responsibilities.

I work remotely from Bali, on UTC+8. Before we start, we agree a working overlap in your local timezone, a review schedule and response expectations. For agency work, these fit within the days you have reserved.

The products in my portfolio are independent projects I designed, built and deployed. They show how I approach the interface, the data model and the practical work of launching and maintaining an application.

Project builds include a documented handover and 30 days of fixes for bugs in the agreed scope after launch. Ongoing support and new features are quoted separately.Read more about the delivery processor my approach to architecture.

03  THE STACK

Tools I use to build and maintain products.

I use TypeScript across the interface and server code to keep data structures consistent. The rest of the stack depends on the project, its integrations and the team maintaining it.

LANGUAGE
TypeScript, strict, end to end
FRONTEND
Next.js · React · Tailwind
BACKEND
Node · Express · Server Actions
DATA
Postgres · Prisma · Supabase · Redis
INFRA
Vercel · Docker · GitHub Actions
SECURITY
Threat modelling · access control · CTF background
04  WHERE I AM

Remote, from Bali.

BASED
Bali, Indonesia · UTC+8
WORKING WITH
Founders, small teams and design agencies
BACKGROUND
5 years in production · security competitions
STATUS
Available for new projects
STACK
Next.js · React · TypeScript · Tailwind · Node / Express · Supabase · Postgres · Prisma · Redis · Vercel