QA Engineer & SDET

Muhammad Arrafi

QA Engineer & SDET with 5+ years testing Web, Android, iOS, and API platforms in fast-paced Agile teams. I build scalable test automation frameworks, drive testing for large-scale service migrations while safeguarding tracker data integrity, and use AI/LLM to move faster without cutting corners on release quality.

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01 — About

How I Work

I treat quality as a shared responsibility, not a gate at the end of a sprint — I get involved from PRD review onward so ambiguous requirements get caught before they become bugs. When something breaks, I care more about the root cause than closing the ticket fast, and I default to automating anything I'd otherwise repeat by hand. I also lean on AI/LLM tools deliberately: to move faster through the repetitive parts of QA, never as a substitute for actually understanding what I'm testing.

02 — Work

What I've Built

Automated Integration Testing for CI/CD Pipeline

Automated integration test suite that verifies product and widget behavior across multiple service dependencies before every release.

Automation
Integration Testing
CI/CD

Tracker Event Validation Framework

A data-driven framework that validates analytics tracker payloads against per-event JSON contracts across Web, Android, and iOS — catching tracking regressions during testing before they reach the dashboard.

Test Automation
Java
TestNG
XPath
Event Tracking

Component-Driven Automation Framework for Discovery

A data-driven Java framework that auto-generates validations from live page structure, making thousands of Discovery pages testable without per-page scripts.

Java
TestNG
Test Automation
Data-Driven Testing
GraphQL
ExtentReports

Load & Stress Test Scripting Strategy

Author and maintain the load-test scripts that size traffic from real BAU and event data, catching capacity risks before they hit production.

Load Testing
Locust
Performance
Python
QA Automation

03 — Experience

Where I've Worked

Feb 2024 — Present · Jakarta, Indonesia
QA Engineer
Tokopedia (ByteDance)
- Performed end-to-end manual and automated testing across core platform surfaces on Web, Android, iOS, and API, ensuring release quality within Agile sprint cycles.
- Drove testing for a large-scale cloud infrastructure migration of core platform services — designed and executed regression and integration test plans, and collaborated cross-functionally to validate system stability pre- and post-migration.
- Validated event tracker implementation and maintained data integrity throughout the migration, safeguarding analytics accuracy, a seamless user experience, and uninterrupted business operations.
- Contributed to the quality of newly launched product features by verifying UI consistency, functional behavior, and event tracker accuracy, ensuring a stable and reliable initial release.
- Analyzed Product Requirement Documents (PRDs) to define comprehensive test scenarios and acceptance criteria, proactively identifying ambiguous or missing requirements before development to prevent defects early in the cycle.
- Identified, documented, and tracked defects through resolution, partnering with developers and data analysts to minimize escaped defects in production.
- Leveraged AI/LLM tools to accelerate onboarding on new domains, analyze product and technical documentation, generate and refine test cases, develop automation scripts, and produce structured QA documentation — significantly improving testing efficiency and coverage.
Aug 2021 — Feb 2024 · Jakarta, Indonesia
Software Development Engineer in Test (SDET)
Tokopedia
- Promoted within the first year in recognition of consistent delivery and ownership of high-impact testing projects.
- Ensured functionality and performance of the platform's highest-traffic surfaces — including the home feed and content discovery pages — through front-end and back-end automated testing.
- Designed, developed, and maintained test automation frameworks, tools, and scripts following industry best practices, improving test coverage and reducing manual regression effort.
- Authored comprehensive test cases spanning unit, functional, integration, regression, tracker, and stress testing.
- Led and managed multiple concurrent testing projects, delivering QA sign-off across platforms within agreed timelines.
- Coordinated with development and operations teams to align testing standards and integrate automated tests into the CI/CD pipeline.
- Executed manual and automated testing across multiple product surfaces spanning Web, Mobile Web, Android, iOS, and API layers.

04 — What I Do

What I Do

Requirements & Test Planning

I analyze PRDs and technical docs to define test scenarios and acceptance criteria upfront, catching ambiguous or missing requirements before development starts — so testing shapes the release, not just checks it at the end.

Functional Testing

I write test cases spanning unit, functional, integration, regression, tracker, and stress testing, combining structured test design with exploratory techniques to catch issues before release.

Test Automation

I design and build test automation frameworks using Java, TestNG, and Selenium, wiring them into CI/CD pipelines so regressions are caught automatically instead of relying on manual runs.

API Testing

I validate REST API contracts and tracker event payloads using Postman and Proxyman, covering functional correctness and analytics event schemas so integrations stay reliable across releases.

Mobile Testing

I test Android and iOS apps alongside Web and API layers using Appium and Flipper, catching platform-specific bugs across devices before they reach users.

Tracker & Data Validation

I safeguard analytics integrity by validating event tracker schemas during large-scale platform migrations, building data-driven validation frameworks that scale as new events are added.

AI-Assisted QA

I use AI/LLM tools to speed up PRD analysis, generate and refine test cases, scaffold automation scripts, and produce structured QA documentation without cutting corners on release quality.

Quality Bug Reports

I write clear, reproducible bug reports — title, severity, environment, steps to reproduce, and supporting screenshots or logs — so developers can triage and fix fast, and stakeholders can prioritize with confidence.

05 — Skills