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Triprasetya

I build web systems that hold up under real load — a comedy streaming platform serving 10,000+ concurrent viewers, patient registration that can’t go down, fintech tools where a bug means someone’s money moves wrong. React, Node.js and Java Spring Boot are my usual stack; staying fast and reliable under pressure is the actual job.

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Shipped: 8 production projects, from live streaming platforms to hospital kiosks.
Critical: 3 domains — OTT services, healthcare and banking, each with its own failure cost.
End-to-end: 4 roles — QA, frontend, backend and fullstack, across the whole delivery chain.

ReactJS

Redux Toolkit

Node.js

ExpressJS

Java Spring Boot

Flutter

Dart

PostgreSQL

MySQL

Sequelize

AWS

WebdriverIO

CI/CD

About

Six years in, most of that time has gone into keeping other people’s systems alive when downtime actually costs something — a fintech platform at Linebank, a mobile app and self-service kiosk at JEC Hospitals handling 200,000+ and 5,000+ patient appointments under strict privacy and audit rules, and streaming infrastructure built to hold 10,000+ concurrent viewers without buffering. I started in QA, building a test-automation framework from scratch that took regression coverage from 0% to 70%, which is probably why I still think about what breaks in production more than what looks good in a demo. Day to day that’s React and Node.js, Java Spring Boot when the job calls for it, and enough time on Agile teams to review PRs and mentor without turning it into a whole thing.

Focus

Performance under load · Reliability during incidents · Fewer 2am pages

Platforms

Web · iOS · Android — one Flutter codebase for mobile

Team

Agile / Scrum · Mentoring junior developers

Experience

Front-End Developer
PresentOct 2023 — Now
PT CNA Innilabs Indonesia · placed at Linebank
- Translate business requirements into system design & task breakdowns
- Build responsive, pixel-accurate UIs from design mockups
- Implement state management, data flow & API integration
- Review PRs, mentor juniors; own Git branching & release workflow
- Optimize performance — code splitting, asset optimization, caching
Freelance Fullstack Engineer
Jul 2023 — Jul 2026
JEC Hospitals & Clinics
- Built the JEC Mobile App, handling 200,000+ patient appointments
- Built the JEC Self-Service Kiosk, handling 5,000+ appointments
- Developed backend services & APIs under strict privacy & audit rules
- Managed deploy pipelines & store submissions; DB backup & recovery
QA Engineer
May 2020 — Jul 2023
PT Sinarmas Mining
- Built a WebdriverIO test-automation framework from scratch
- Grew automated regression coverage 0% → 70%
- Cut manual testing effort by 60%
- Integrated the automation suite into CI/CD