Open to senior QA & product roles

Thomas Cornelius Tjandra

QA Engineer
& Product Manager

I help product teams ship with confidence: clear test plans, automated regression, and security gaps found before users find them.

Eight years in QA, from Indodev and Gramedia Digital Nusantara to Fairatmos. Since May 2025 I've also owned products at Fairatmos, and outside work I build and run my own software.

Discuss a QA or product role See selected work

QA since 2018 · Leads internal ISO 27001:2022 audits · BSc Computer Science, UMN

01

Test
Automation

API, web & mobile with Katalon, Postman, Cucumber BDD, and Robot Framework.

Thomas Cornelius standing on a wooden pier at night
Thomas CorneliusQA Engineer · Product Manager
Result at Fairatmos
40%

less manual testing after my test plans and automation scripts

pos-desktop · npm test
$ vitest run
✓ checkout & shifts
✓ tables & kitchen
✓ guest QR ordering
✓ permissions
105 passed · PG + SQLite
Product ManagerFairatmos · since May 2025
ISO27001:2022

Leads internal ISMS audits, penetration tests, and load tests

02

Build,
test, run

My own products, from code to server.

Hiring for QA or product?

Tell me about the role, the team, and the quality problems you're facing.

The Fairatmos figures were measured by my team at the time; I'm happy to walk through them in an interview.

/ 01

Selected work

Two pieces of my work at Fairatmos, and products I built myself.

FairatmosOct 2022 — present

Test automation & partner integrations

Context
Products shipped regularly and connected to partner systems, while regression testing was still largely manual.
My role
QA Engineer; led the automation project and B2B integration testing.
What I did
Wrote test plans and automation for API, web, and mobile (Katalon, Postman), led automation for the B20 application, tested integrations with Bobobox, Potato Head, and Pamerindo, and standardized the bug-report format.
  • −40% manual testing
  • −30% post-launch issues
  • −40% bug-report errors
FairatmosInformation security

ISO 27001:2022 audits & security testing

Context
The company needed to keep its Information Security Management System (ISMS) compliant.
My role
Lead for internal audits.
What I did
Internal ISMS audits, penetration tests, and load tests; found high-risk vulnerabilities and followed the fixes through with developers.
  • ISO 27001:2022 compliance maintained
  • Pentest
  • Load test
● Live2026 · Personal project

POS Desktop

A point-of-sale app for restaurants and shops. I did all of it: design, development, testing, security, and the server.

Context
Restaurants need a POS whose data lives on a server, while receipts and kitchen tickets still print straight to the shop's thermal printers, including orders taken on a waiter's phone.
What I built
A Windows app (Electron) and a PWA, both backed by Node.js + PostgreSQL on a VPS.
  • Restaurant tables, order rounds, kitchen display, and print stations for kitchen & bar.
  • Table QR guests order from their own phone, protected by a 4-digit code.
  • Thermal printing ESC/POS over Bluetooth, COM, USB, LAN, and from the browser.
  • Operations shifts, cash, purchasing & stock, margin control, reports.
  • Access control per-employee roles; PIN login only on trusted devices.
  • AI Living an isometric floor plan that moves with live order data.
  • 105 automated tests on PostgreSQL & SQLite
  • 2 pentest rounds, findings closed
  • Daily backups kept 30 days
  • Electron
  • React
  • TypeScript
  • Node.js
  • PostgreSQL
  • Vitest
  • Caddy
  • Ubuntu VPS
Open the app ↗
Prototype2026 · Fairatmos · as PM

AtmosWatch 2.0

A clickable prototype for MRV (Monitoring, Reporting & Verification) of Climate, Community & Biodiversity on REDD+ (VM0048) and ARR (VM0047) carbon projects.

  • Ten user roles, from MRV Officer and Enumerator to VVB/Auditor and Investor, each with its own menu.
  • Satellite map with layers, AI review, patrols, field input over WhatsApp, and Evidence & Audit.
  • Real Supabase sign-in, plus a PRD, deck, and module structure (M01–M10).
  • UI/UX
  • Supabase Auth
  • Vercel
  • MRV
atmoswatch-2-0.vercel.app ↗
Kantor Agent CRM: a 3D office with eight agent characters at their desks
● Live2026 · Experiment

Kantor Agent CRM

A 3D office where eight AI agents (PM, BD, QA, Backend, Frontend, Security, Auditor, Finance) work and hand tasks, reports, bugs, and approvals to each other.

  • Connected to Lark CRM; for example, the Auditor counts deals still missing a Project Code.
  • Claude updates the agents while working on tasks; data streams live over Server-Sent Events.
  • Node.js
  • SQLite
  • SSE
  • Docker
  • Lark API
  • Claude
agent.thomastechbusiness.com ↗
Open source2026 · Experiment

Mahjong Scorer

A web app for scoring mahjong at a real table: photograph the winning hand, confirm the tiles, and the app explains every point and who pays what.

  • Chinese Official rules (1998): 81 patterns, the "cannot be combined with" table, 8-point minimum.
  • A PWA that works without a server; tile recognition from photos via Claude.
  • TypeScript
  • Vite
  • PWA
  • IndexedDB
  • Claude API
github.com/gnopen/mahjong-scorer ↗
Open source2026 · Experiment

Content Creator Agent

A multi-agent system that turns one topic into ready-to-post content for several social networks.

  • A content agent writes ideas, captions, and hashtags per platform with Gemini Pro.
  • A posting agent publishes to X, Instagram, Facebook, and LinkedIn, immediately or on a schedule.
  • Python
  • Gemini Pro
  • Multi-agent
github.com/gnopen/contentcreator ↗
/ 02

Skills

And where I've used them.

01

Quality assurance & automation

Test plans, test cases, BDD, and System Acceptance Test documentation.

Used in six product test plans at Gramedia Digital Nusantara; API, web, and mobile automation at Fairatmos.

  • Katalon Studio
  • Postman
  • Cucumber BDD
  • Robot Framework
  • Vitest
02

Security & compliance

ISO 27001:2022 audits, penetration testing, load testing, and API request analysis.

Used in internal audits at Fairatmos; API validation at Gramedia; two pentest rounds on POS Desktop.

  • ISO 27001:2022
  • Burp Suite
  • Sentry
  • SonarQube
03

Product management

PRDs, prioritization, and Agile delivery with developers and business teams.

Used in CPMS, Carbon Calculator, AtmosDev, Atmosfund, and the AtmosWatch 2.0 prototype.

  • Agile / Scrum
  • Jira
  • Azure DevOps
  • Notion
  • Lark
04

Full-stack development

Desktop, web, and PWA apps, including the server, database, and deployment to a Linux VPS.

Used in POS Desktop and Mahjong Scorer.

  • TypeScript
  • React
  • Electron
  • Node.js
  • PostgreSQL
  • Python
  • Java
05

Data & geospatial

Data scraping, Google Workspace automation, and geospatial analysis and visualization.

Used in carbon projects and business-team automation at Fairatmos.

  • Google Earth Engine
  • QGIS
  • Apps Script
06

AI & agents

AI models inside products: image recognition, content generation, and agents connected to a CRM.

Used in Mahjong Scorer, Content Creator Agent, and Kantor Agent CRM.

  • Claude API
  • Gemini Pro
  • Multi-agent
/ 03

I test products like an owner, and build them like a tester

  1. 01

    Test what users do, not only what the spec says

    Many issues live in the seams between systems, not inside them. That's why I run partner integration tests myself before release.

  2. 02

    Automate the repetitive, keep time for thinking

    Machines run the regression suite. People spend their time looking for the cases nobody has thought of yet.

  3. 03

    Security is part of "done"

    I've inspected API requests with Burp Suite since 2019, and my own product only went live after two rounds of penetration testing.

  4. 04

    Clear bug reports speed everyone up

    A consistent format lets developers understand a problem without a round of follow-up questions.

/ 04

Experience

Open each role for details.

  1. May 2025 — presentProduct ManagerFairatmos · Full time

    I own digital products for the carbon-project ecosystem, from project developers to investors, alongside my QA role.

    CPMS

    Carbon Project Management System: the carbon-project lifecycle from registration, monitoring, and reporting to third-party verification, with dashboards and documentation aligned to international standards.

    Carbon Calculator

    Calculates emissions from energy, transport, waste, and fuel; returns CO₂e instantly with mitigation or offset recommendations.

    AtmosDev Page

    A hub for carbon-project developers: technical guidelines, expert consultations, and a submission portal for pre-feasibility and feasibility studies.

    Atmosfund Page

    Connects carbon projects with investors, CSR programs, and philanthropies, with transparent impact reporting.

  2. Oct 2022 — presentQuality Assurance EngineerFairatmos · Full time since Jan 2023
    • Wrote test plans and automation for API, web, and mobile (Katalon, Postman, spreadsheets); manual testing down 40%.
    • Led the test automation project for the B20 application.
    • Led B2B integration testing with Bobobox, Potato Head, and Pamerindo; post-launch issues down 30%.
    • Held developers to agreed standards; code quality up 20% and project delays down 15%.
    • Standardized bug reporting and QA workflows; reporting errors down 40%.
    • Streamlined debugging; efficiency up 25%.
    • Led internal ISO 27001:2022 audits, penetration tests, and load tests.
    • Streamlined testing and delivery; new releases reached the market 30% faster.
    • Automated data scraping with Python and Katalon; business-team productivity up 35%, data accuracy up 25%.
    • Automated Google Workspace with Apps Script and analyzed geospatial data in Google Earth Engine.
  3. Dec 2019 — Dec 2022Quality Assurance EngineerGramedia Digital Nusantara · Full time
    • Wrote six product test plans: Admin, E-Commerce, Bhisma Self Service, Marketplace Integration, Inventory Management, and POS.
    • Tested the Marthatilaar, Reckitt Benckiser, and Tira e-commerce platforms, manually and with automation.
    • Introduced Cucumber BDD in Katalon Studio and Robot Framework to widen test coverage.
    • Intercepted and analyzed API requests with Burp Suite to find security gaps.
  4. Nov 2018 — Nov 2019Quality Assurance EngineerPT Indodev Niaga Internet · Contract
    • Automated testing for the Employee, Attendance, and Career modules and Malaysian tax reports.
    • Tested systems for clients including WWF Indonesia, Astra Otoparts, and Universitas Indonesia.
    • Wrote System Acceptance Test (SAT) documentation.
    • Trained manual QA team members to write automation scripts.
  5. Jul 2017 — Feb 2018Software EngineerPT Kompas Gramedia · Intern
    • Designed and built an Employee Performance Review web app tracking career interests, competencies, and performance.
    • Built a Job Dashboard application and a clinic website.
Education

BSc Computer Science

Universitas Multimedia Nusantara · 2014–2018

GPA 3.5 / 4

Award

Top 3, Course-Net Computer Science Innovative Challenge 2017

A document text-summarization app using the Nazief–Adriani algorithm.

/ 05

About me

I started as a developer, moved into QA, and now also help decide what gets built.

My career began as a software engineering intern at Kompas Gramedia, building an employee performance review app. I then moved into QA, and since 2018 I've tested HR systems, e-commerce, marketplaces, POS, and carbon-project platforms.

The developer background makes me comfortable reading code and writing automation. QA made "what happens if this fails?" a habit. Since 2025, as a Product Manager at Fairatmos, I also help decide what gets built first.

Outside work I build my own software and run it on my own servers: a point-of-sale app, an AI agent office, and a mahjong scorer.

Now
QA Engineer & Product Manager, Fairatmos
Looking for
Senior / lead QA roles, or Product Manager roles
Location
Serpong Utara, Banten, Indonesia · UTC+7
Education
BSc Computer Science, Universitas Multimedia Nusantara
Languages
Indonesian, English

Beyond a full-time role

I'm also open to conversations about QA and security audits, and about building software for businesses, such as a restaurant POS.

/ 06

Hiring for QA or product?

Tell me about the role, the team, and the quality problems you're facing. Email is the fastest way to reach me.

thomascorneliust@gmail.com GitHub · gnopen ↗

Serpong Utara, Banten, Indonesia · UTC+7