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

PT Ajaib Sekuritas Asia; Daerah Khusus Ibukota Jakarta; On-site; IDR 100.000.000 - 200.000.000; Full time

Job summary

A leading fintech platform in Jakarta is seeking a Sr. Software Development Engineer in Test II to enhance quality engineering across a growing microservices platform. This role involves designing automation frameworks, mentoring SDETs, and collaborating with cross-functional teams to ensure zero-defect releases. Candidates should have substantial experience in QA/SDET, strong programming skills, and a passion for quality culture.

Qualifications

• 6+ years of experience in QA/SDET or software engineering, with at least 2+ years designing frameworks.
• Proficiency in Python, Java, or JavaScript/TypeScript.
• Strong understanding of performance, load, and security testing.

Responsibilities

• Own test strategy and automation architecture for multiple product areas.
• Design and build test automation frameworks for various testing types.
• Mentor SDET engineers and drive best practices across teams.

Skills

Programming in Python

Automation testing tools

Debugging

Analytical skills

Education

Bachelor’s degree in Computer Science or Software Engineering

Tools

WebdriverIO

Cypress

Selenium

JMeter

Job description

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.
  

• 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.