Case Studies

A selection of architectural challenges focusing on business problems, trade-offs, and quantifiable impact.

2026

From Blocking to Background: Fixing Slow Approval Routes with a Queue

Moving email and reporting work out of the request path with BullMQ, then adding user-aware observability for faster debugging.

Improved async reliability for operational jobs and made user-level production issues easier to trace and debug.
NestJSBullMQRedisLGTM
2026

Blue-Green Deployment for a Nuxt Frontend on Docker and Nginx

Implementing zero-downtime frontend deployment by switching Nginx traffic between Dockerized Nuxt app instances.

Enabled zero-downtime frontend releases with safer rollout and rollback for the Nuxt application.
NuxtDockerNginxBlue-Green Deployment
2025

Serverless Refund Portal & Cloud Ops

Building a high-availability refund portal with AWS Edge logic to securely handle overpaid tuition refunds with minimal infrastructure cost.

Processed 1,900+ refund submissions with 100% uptime, secure access control, and automated refund-window shutdown.
AWS CloudFrontAWS S3CloudFront FunctionsPython
2025

Enterprise ETL Modernization & IoT

Replacing fragmented PHP scripts with a centralized Python ETL platform for attendance and student data synchronization.

Reduced sync latency by 90% and stabilized ingestion across 64 biometric devices.
PythonPandasPyZK (IoT)MySQL
2024

Unified Identity & RBAC Blueprint for a Polyglot Microservice Migration

Creating a cross-language authentication and authorization blueprint that standardized security behaviour across Python, PHP, TypeScript, and React services.

Delivered a production-ready identity foundation adopted across FastAPI, Laravel, Native PHP, NestJS, HonoJS, and the new React portal.
Clerk AuthFirebase OAuth2ReactFastAPI
2024

High-Volume Payment Gateway (Bank Indonesia SNAP)

Re-architecting a 39,000+ total annual transactions payment infrastructure to comply with Bank Indonesia SNAP regulations, achieving zero-downtime migration.

Processed 39,000+ total annual transactions with 100% UAT pass rate across 3 UAT rounds and zero compliance violations.
PHPMySQLRedis (planned)Docker