I build test automation frameworks, evaluate AI accuracy, and validate performance at scale—helping teams ship reliable software faster.
My current proficiency levels across different testing domains and technologies.
I'm a Software Quality Assurance Engineer with 6+ years of experience ensuring product quality across enterprise, e-commerce, and AI/ML applications. I specialize in test automation, performance testing, and AI accuracy evaluation—driven by a curiosity to understand how systems behave under real-world conditions.
Currently building: AI testing evaluation framework comparing BERTScore, ROUGE-L, and LLM-as-judge approaches (preparing for open-source release).
I ensure the quality and reliability of software products through structured testing, test case design, functional testing, and performance analysis.
Manual & API Testing, Playwright Automation, Performance Testing (K6), Test Planning & Documentation
6+ years in QA & IT, enterprise-level testing, automation initiatives, load testing, cross-functional experience as QA/BA/PM
As a Quality Assurance Engineer, I have worked across different industries and roles, from manual testing and automation to performance testing and AI-assisted features. Here is a brief overview of my professional experience.
PT Packet Systems Indonesia
July 2024 – Present
Focusing on testing AI applications, building test strategies, and combining manual and automated testing for AI models and APIs.
Key Achievements:
PT Ako Media Asia (SALT) – Telkomsel MyOrbit
Mar 2021 – Jul 2024
Progressed from Mid QA (2021-2022) to Senior QA (2023-2024)
Operational QA Phase (2021-2022):
PT Mitrais
Jan 2020 – Dec 2020
Performed functional, integration, and regression testing for multi-tenant training and compliance management system (web + mobile).
PT Asuransi Umum BCA
Aug 2018 – Dec 2019
Provided application support and automation for internal business systems.
Key Achievements:
VS Code
Postman
Git
Playwright
K6
Qase Test Case ManagementA snapshot of projects where I contributed as a QA Engineer, Automation Engineer, and sometimes as a PM/BA. Each project highlights different aspects of my work: manual & API testing, automation with Playwright, performance testing, and AI-related QA.
QA Engineer • Playwright Automation • System Architecture
An automated scraping system designed to collect daily transaction data from a web and deliver it to Google Sheets, featuring a modular architecture, multi-account support, and performance optimization.
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Project Manager • Business Analyst • QA Engineer
Web-based system to manage product data and track price changes, enabling sales teams to access accurate pricing from desktop and mobile.
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Feedback from colleagues and collaborators I've worked with throughout my career.
“Jakfar Yakub is a visionary Senior QA Analyst. His ability to blend manual precision with advanced automation, coupled with a specialized focus on AI system integrity, sets him apart in his field. He consistently delivers high-precision results and contributes significantly to the team’s overall innovation and technical excellence.”
Dwika Nurachman Aji Laksono
QA Analyst, SALT Indonesia
“Jakfar is one of my former colleagues who consistently demonstrates above-average critical thinking relative to peers in similar roles. His analyses are precise and typically extend multiple layers into the technical domain, enabling faster identification and narrowing of key issues and risks. He also combines solid technical expertise with sound business acumen, allowing him to effectively bridge technical considerations with business objectives.”
Adolf Filius Gatara
Solution Architect & Analyst Lead, SALT Indonesia
“Jakfar has strong analytical skills, particularly in understanding the impact of requirement changes across other areas. Several critical defects were identified early because Jakfar consistently reviews the end-to-end flow, not just the acceptance criteria. This has been very helpful in reducing rework during the later stages.”
Hari Agus Prasetyo
QA Lead, SALT Indonesia
“Jakfar is an active QA engineer who not only finds bugs but also provides solutions to fellow QA engineers. He is skilled at problem solving.”
Fiqri Hendrawan
QA Analyst, SALT Indonesia
“Jakfar is a skilled QA Engineer with strong expertise in AI Driven testing approaches. His ability to adapt to new technologies, combined with his analytical mindset and attention to detail, makes him a valuable asset to any engineering team. Jakfar contributions had a positive impact on both reliability and delivery speed on Crampas AI.”
Isak Maruhum Purba
Senior Devops Engineer, Packet System Indonesia
“Jakfar is a cheerful QA Analyst who brings good vibes to the team. He’s professional in his work, often thinking beyond the usual test cases and even sharing helpful advice on how to solve issues. His communication and follow-ups with developers are clear, well-timed, and effective. Overall, he’s a solid QA who really supports the team.”
Luqman Hakim
Backend Engineer, SALT Indonesia
“A reliable QA specialist with sharp attention to detail and a strong sense of ownership. Jakfar plays a key role in maintaining high product quality and smooth releases.”
Ary Setya Pambudi
Backend Engineer, Packet Systems Indonesia
“As a Quality Assurance, Jakfar Yakub demonstrates a high level of professionalism in maintaining the quality of applications and websites through good testing, well-organized documentation, and effective communication with the development team and stakeholders. Jakfar has strong analytical skills and is able to identify risks from the early stages of development.”
Muhammad Ridwan Aditya Prasettyo
Project Analyst, SALT Indonesia
* Names anonymized for privacy. Real testimonials available upon request.
jakfaryakub@gmail.com