Hello,

I'm Damar Mustiko Aji
a Quality Engineer
based in Yogyakarta.

About Me.

A passionate Quality Engineer and SDET who believes that great software deserves great testing. Over the past five years, I've worked on various projects — testing APIs, UIs, and end-to-end flows using tools like Postman, k6, and custom-built automation dashboards.

Beyond testing, I enjoy collaborating closely with developers, exploring performance metrics, and crafting smarter test strategies that make development faster and more reliable. My mission is simple: to ensure every release is stable, scalable, and ready to delight users.

Experience

  • LinkAja
    Quality Assurance Specialist - SDET
    November 2020 — Present
  • Ralali.com
    Quality Engineer
    March 2019 — October 2020
  • MauKerja.id
    Quality Assurance Engineer
    September 2018 — February 2019
  • Wonderlabs
    Quality Assurance Engineer
    September 2017 — Augustus 2018
  • Sebangsa
    Quality Assurance Automation Specialist
    July 2017 — Augustus 2017

Skills

  • Manual Testing: website, mobile apps (android, ios), API (backend)
  • Automation Testing: Website, API, Mobile apps (android)
  • Creating Test cases and Management
  • Basic Knowledge of query language (MySQL, Postgres)
  • Writing script tests using the programming language
  • Familiar and used to: git (GitHub, GitLab) activities, dashboard monitoring log (grafana, datadog, kibana)

Tools & Programming Languages

  • TestRails Management
  • Jira and Confluence (atlassian)
  • Postman, Apidog, Insomnia, Swagger
  • Table Plus
  • Visual Studio Code
  • CI/CD (GitHub Actions, GitLab CI/CD)
  • Grafana, Log SSH, Lens/Kubernetes
  • K6 (for Performance Test)
  • Playwright, Cypress, Mocha and Chai, Selenium, Appium, Robot Framework, Katalon
  • Type Script, JavaScript, Python

Portfolio.

EJS + Express + Playwright - API Test Dashboard Generator

Built a custom dashboard generator that automatically creates and executes API test scripts using Playwright.

Mocha & Chai - API Automation Testing

Automated REST API validation focusing on response integrity and schema verification.

Cypress + Cucumber - Web Automation

Implemented BDD-style web testing with Cypress and Gherkin syntax integration.

Behave + Selenium WebDriver - Web Automation

Leveraged BDD testing with Python Behave for cross-browser validation scenarios.

Robot Framework - API Automation Testing

Designed modular test cases for API endpoints using Robot Framework and data-driven design.