Skip to content
~/samuel

Samuel Russell Prajasantosa · A career in four acts

Software Quality Team Lead. Jakarta-born, Malaysia-trained, now shipping remote with Berlin. Every act of the story is rendered in the particles behind this text — scroll, and watch them re-form.

Four acts · Six formations · Roughly three minutes
Act I · Chapter 01Foundation

Xiamen University Malaysia. Four years on a 50% merit scholarship, held all the way through. Graduated with a Springer-published thesis on lightweight authenticated encryption, then five months at BliBli writing my first real automation framework.

2018 — 2022

B.Eng. Software Engineering (Honours)

Sepang, Malaysia

Xiamen University Malaysia

2022

SDET Intern · BliBli.com

Act II · Chapter 02Scale

Fourteen months at Shopee on the ShopeePay Payment Processing Team. Backend, APIs, databases — the machinery behind Indonesia's largest e-commerce flow. Three projects, each one a different kind of pressure.

01Apr — Jun 2023

Callback Service Rewrite

Led QA for the Java → Golang rewrite of payment callbacks. Four-party integration: user, ShopeePay ID, payment module, and banks.

02Jan — Mar 2023

Accounting Integration

Real-time payment data pipeline so accounting could reconcile against live user payment events instead of yesterday's batch.

03Sep — Oct 2022

GCP → SPACE Migration

Moved ShopeePay services and data from Google Cloud to Shopee's in-house platform — with payments still flowing underneath.

2022 — 2023

Software QA Engineer

Sea Labs · Shopee

Jakarta, Indonesia

Act III · Chapter 03Lead

Started as a freelance moonlight across time zones. Converted to full-time. Promoted to Team Lead. Now responsible for automation strategy, quality metrics, and the practice across multiple products — coordinating dev, product, and QA across continents.

2023 — Present

Software QA Team Lead

Paul's Job

Berlin, Germany · Remote

Owning

Strategy · Metrics · Mentorship

Act IV · Chapter 04The next act

I proposed it. The team I lead built it. A Jira-driven QA agent on Claude and Codex — our move in the AI-agent era reshaping the craft. Live on staging, growing every sprint, returning time to the work only humans are uniquely good at.

2026 — ongoing

Hydra · QA Validation Agent

Status

Live on staging

Built on

Claude · Codex · Claude Code

Read the Hydra case study
Written & engineered by
Samuel Russell Prajasantosa
Foundation
Xiamen University Malaysia · 2018 — 2022
First production
BliBli.com · SDET Intern · 2022
Scale
Shopee · ShopeePay · 2022 — 2023
Lead
Paul's Job · Berlin, remote · 2023 — present
The next act
Hydra · QA validation agent · live on staging
Published thesis
Springer Nature · TinyJAMBU DFA
Original score
Toggle the sound — top right
Set in
Instrument Serif · Inter · JetBrains Mono
Shot on
Next.js · Three.js · Framer Motion

End credits

Four acts in, the story is still being written. If anything here made you curious — about Hydra, AI-native QA, or working together — the door is open.

The Hydra deep diveBack to the main flow

Fin