Software Development Engineer in Test (SDET)

Ajaib is Indonesia’s leading fintech platform, is seeking a highly skilled Software Development Engineer in Test (SDET) to drive quality engineering across our rapidly scaling microservices platform. As SDET function, you’ll implements automated tests for assigned modules, maintains scripts, ensures basic test coverage. You will also works under guidance of senior SDETs, participates in code reviews and QA tasks.

What You Will 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).
• 3+ years of experience in QA/SDET/software engineering
• 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.