Rocky DC — Senior QA Engineer | Freelance Quality Assurance

I break things
so users do not have to.

Senior QA Engineer based in Jakarta with 5+ years of experience across e-commerce, fintech, and SaaS platforms. Specialized in backend/API testing, test automation, data validation, service migration, and campaign quality for high-scale systems serving millions of users.

Strong track record in designing QA strategies that reduce release risk — including automated reconciliation workflows for major sale events, large-scale data validation across tens of thousands of records, and end-to-end migration testing with zero critical production incidents. Comfortable operating across web, mobile (Android/iOS), and backend touchpoints, and mentoring junior QA engineers on automation, test planning, and defect analysis.

I don't just find bugs — I build systems that prevent them.

Cypress ExpertAPI TestingBDD / TDDAgileRemote-Ready

Campaign Promotion & Gamification

Designed and automated an end-to-end campaign data reconciliation workflow using AI Agent orchestration, replacing manual ,spreadsheet exports and pivot-based validation, and cross-platform product mapping across 20–60 campaigns per major sale event — reducing manual QA effort by 3+ hours per event.
Developed 4 automated SQL-based reconciliation scripts monitoring campaign data integrity every 10 minutes — detecting zero-product readiness issues across platform and seller campaigns, cross-platform field-level mismatches across 6 key attributes, and seller flash deal activities that failed to mirror into the buyer-facing system — preventing empty, misconfigured, or invisible campaigns from impacting live users.
Validated a multi-experiment gamification reward system, ensuring correct user assignment to reward missions based on eligibility, experiment grouping, and priority rules — covering concurrent campaign overlaps, full mission lifecycle, and 9 previously uncovered edge cases identified during test planning.
Designed comprehensive test coverage for complex user-state combinations across membership tiers, eligibility rules, localization, and cross-platform UI behavior on Android and iOS.

Content Feeds

Led QA for content-driven commerce features across feed product-card optimization and mission-based bonus floater flows, ensuring on-time release readiness with no QA-side launch delay across web, Android, iOS, and backend touchpoints.
Identified and managed 25 offline defects during product optimization testing — including 12 high-priority issues — improving release quality across pricing, promotions, product-card display logic, and feed-to-product-detail consistency.
Built an automated data-consistency validation script between feed and product detail pages, and expanded bonus-floater test coverage by uncovering 9 undocumented edge cases — preventing production issues and improving scenario coverage before launch.
Supported a feed product-card optimization that improved key commerce engagement metrics: +8.22% GMV per user and +3.98% product click conversion after product exposure.

Seller Analytics Integration TikTok Shop

Acted as key QA driver ensuring data accuracy and reliability for business-critical seller analytics, directly impacting platform trust and adoption across a large seller base.
Supported multiple high-impact product initiatives including dashboards, seller tools, and data-driven features.
Detected and resolved 100+ pre-release defects (including critical issues), achieving a ~98% defect detection rate and significantly reducing production risk.
Identified critical data accuracy issues (e.g., traffic source inconsistencies and data synchronization gaps), preventing misleading analytics and poor user experience.

Data & Service Migration – Category Service (Tokopedia to Bytecloud)

Designed and implemented a custom data validation script to verify category, annotation, and brand mapping consistency between legacy and target systems.
Detected hundreds of category mismatches and thousands of annotation inconsistencies, preventing large-scale data integrity issues during migration.
Automated large-scale data comparison across ~25,000 records, reducing validation effort from multiple days to ~2 hours.
Built backend automation test suite (TeslaGo) covering 28 endpoints with full test coverage before the execution phase, enabling faster and more reliable validation cycles.

Data & Service Migration – Seller Analytics Platform (Tokopedia → Bytecloud)

Led end-to-end QA validation strategy for large-scale data migration, combining automation, data validation, and performance testing to minimize release risk.
Executed performance/load testing across 40+ endpoints using Rhino and Hammerflux, ensuring stable latency and system reliability during migration.
Identified and reported data discrepancies in analytics outputs post-migration, ensuring accuracy of key business metrics.
Delivered a high-quality release with zero critical production issues (P0/P1/P2), zero incidents, and no SLA/redline violations post-migration.

Tugu Dashboard – Blockchain Analytics Platform (2024 – 2025)

Designed and executed a comprehensive manual test suite covering 362 test cases across 8 modules, achieving a 100% pass rate with zero failed or blocked cases.
Conducted security-focused testing on role-based access control, identifying critical privilege escalation vulnerabilities and unauthorized data access issues.
Identified and reported 50+ defects, ensuring all critical issues were resolved before release.
Executed load testing across 4 endpoints simulating 20 concurrent users over 30 minutes (~36,000 total requests), confirming stable performance at 20 RPS with zero errors.
Validated API gateway business logic for a blockchain-based logging platform serving enterprise clients in the insurance and financial sector.

Rinkes.id – SaaS Platform (2026)

Conducted exploratory testing and functional validation, focusing on identifying high-risk issues in user flows and system behavior.
Identified critical vulnerabilities in business logic, particularly in account creation and usage limitation mechanisms.
Executed security-focused test scenarios including input validation, file upload handling, and metadata inspection.

Quality
Assurance
Engineer.

I break things
so users do not have to.

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QualityAssuranceEngineer.

I break thingsso users do not have to.