Senior Software Development Engineer in Test

PT AJAIB TTX Solusi (jakarta); Kebayoran Baru; On-site; IDR 300,000,000 - 500,000,000; Full time

Job summary

Ajaib is seeking a Senior Software Development Engineer in Test II to drive quality engineering across a rapidly scaling microservices platform. You will lead test strategy, build cutting-edge automation, and mentor SDETs to deliver zero-defect releases at scale.

This senior IC role focuses on test architecture, advanced automation, and quality culture without people management duties, offering growth in a fintech environment.

Qualifications

• Bachelor's degree in Computer Science, software engineering, or related field.
• 6+ years in QA/SDET with at least 2 years leading quality initiatives.
• Strong programming in Python, Java, or JavaScript/TypeScript.
• Experience with automation tools such as WebdriverIO, Cypress, Appium, Selenium, Playwright, and REST Assured.
• Proven experience testing distributed systems / microservices including API contract testing and mocks.
• Solid knowledge of performance, load, and security testing (JMeter, Gatling, k6, OWASP).
• Hands-on with CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins).
• Excellent debugging, analytical, and problem-solving skills.
• Experience with AI-assisted automation tools or integrating AI to optimize test coverage and efficiency.

Responsibilities

• 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.

Skills

Test strategy

Automation architecture

SDET mentoring

CI/CD pipelines

Distributed systems

Programming: Python/Java/JS

API testing

Performance testing

Security testing

Communication

AI-assisted automation

Education

Bachelor's degree in CS/Software Eng

Tools

WebdriverIO

Cypress

Appium

Selenium

Playwright

REST Assured

JMeter

Gatling

k6

Job description

Senior Software Development Engineer in Test

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.

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.