Senior Backend Engineer

Frenky Harry.

Backend systems for payments, commerce, and crypto.

Senior backend engineer with 10+ years across ecommerce, financial technology, crypto exchanges, and B2B payments. I design and maintain reliable services, lead bank and payment-gateway integrations, and turn business requirements into production-ready backend platforms.

Chapter 01

About Me

Frenky Harry by Niko Wiratma

Illustration — Niko Wiratma

I've loved computers since middle school. They weren't widely available where I grew up, so I'd go to computer rental shops just to mess around in MS Word — printing WordArt was the highlight. In high school, my school finally built its first computer lab, and I spent more nights there than I probably should have. That's where I first met the World Wide Web, and where I decided I wanted to build websites.

I studied Information Technology at Maranatha Christian University in Bandung. Job hunting as a fresh graduate was anything but easy, and I eventually decided Bandung wasn't where I'd grow fastest. I took a Web Developer offer at Tokopedia, moved to Jakarta, and the rest is history.

Chapter 02

Where I've Worked

Now Showing

Senior Backend Engineer @ XenithPay

July 2024 → Present

XenithPay is a B2B payment aggregator serving merchants from small businesses to enterprise. I lead system design and own the integrations with payment gateways and banking partners that keep merchant money moving.

  • Architect core platform capabilities end-to-end, balancing reliability, throughput, and operational simplicity for a payments-grade workload.
  • Lead integrations with payment gateways and banking partners — covering API contracts, reconciliation, settlement, incident response, and partner-specific compliance.
  • Design pluggable backend modules so new partners and payment methods come online without re-architecting the core, keeping the long tail of merchant integrations manageable.
  • Drive the team's adoption of LLM-assisted development across code review, documentation, and integration scaffolding to ship faster without trading off quality.
  • Partner with product, ops, and merchant-success teams to keep onboarding, settlement, and dispute flows running smoothly across small-business and enterprise tiers.

Languages

  • Go

Technologies

  • PostgreSQL
  • Redis
  • Kafka
  • gRPC

Tools

  • GitHub Actions
  • Docker
  • Kubernetes
  • LLM-assisted dev

Chapter 03

Currently Exploring

01 / 02

LLM-assisted development is the shift I'm paying the most attention to right now. The way these tools change day-to-day engineering work — code review, scaffolding integrations, drafting docs — is moving fast enough that the right workflow today probably isn't the right one in six months. I'm spending real time on what holds up in production and what doesn't.

02 / 02

On the side, I've been going deeper into systems fundamentals — the layers underneath the languages and frameworks I work in every day. After a decade of shipping in production, the questions I'm interested in have shifted from "how do I use this?" to "why does it behave this way under load?", and that's a much more rewarding rabbit hole.

Chapter 04

Connect With Me

I'm open to new opportunities, and my inbox is always open. Whether you have a question or just want to say hi, I'll do my best to get back to you.

Say Hello. hello@frenky.id ↗
  • Available for work
  • ✦
  • Software engineer
  • ✦
  • Based in Jakarta
  • ✦
  • Remote welcome
  • ✦
  • Let's build
  • ✦
Man in a table with laptop illustration by Themeisle.com