Ajaib is Indonesia's leading fintech platform, is seeking a highly skilled Sr. Software Development Engineer in Test II (Sr. SDET II) to drive quality engineering across our rapidly scaling microservices platform. As the technical leader of our QA/SDET function, you'll shape test strategy, build cutting-edge automation frameworks, and mentor SDETs to deliver zero-defect releases at scale.

This is a senior individual contributor role with technical leadership responsibilities - ideal for someone passionate about test architecture, advanced automation, and quality culture, without full-time people management duties.

What You'll Do

Own test strategy and automation architecture for multiple squads or product areas spanning backend, frontend, and mobile
Design, build, and scale test automation frameworks for API, UI, contract, integration, and performance testing
Partner with engineering leads and architects to embed testability and quality gates into designs and CI/CD pipelines
Mentor and upskill SDET engineers, review their test designs, and drive best practices across squads
Lead cross-functional initiatives on non-functional testing — performance, reliability, security, and chaos engineering
Collaborate with DevOps to optimize test pipelines for speed, scalability, and reliability
Diagnose complex production issues, perform root-cause analysis, and drive systemic fixes
Innovate and introduce tools, test data solutions, mocks, and dashboards that improve developer productivity and release confidence.

Requirements

Bachelor's degree in Computer Science, Software Engineering, or related field (or equivalent experience)
6+ years of experience in QA/SDET/software engineering, with at least 2+ years designing frameworks and leading quality initiatives
Strong programming skills in Python, Java, or JavaScript/TypeScript (can design and extend frameworks)
Expertise in modern automation tools (WebdriverIO, Cypress, Appium, Selenium, Playwright, REST Assured, etc.)
Proven experience testing distributed systems / microservices architectures, including API contract testing and service mocking
Solid understanding of performance, load, and security testing (JMeter, Gatling, k6, OWASP)
Hands-on with CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins, etc.)
Exceptional debugging, analytical, and problem-solving skills
Strong communicator with experience influencing engineers and stakeholders at multiple levels
Experience with AI-assisted automation tools or integrating AI to optimize test coverage and efficiency

Sr. Software Development Engineer in Test (Sr. SDET)