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

Ajaib; 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 Senior Software Development Engineer in Test II to drive quality engineering across their microservices platform. This role involves owning test strategy, designing automation frameworks, and mentoring SDET engineers to ensure zero-defect releases. Candidates should have over 6 years of QA/SDET experience and strong programming skills in Python, Java, or JavaScript.

Qualifications

• 6+ years of experience in QA/SDET/software engineering.
• At least 2+ years designing frameworks and leading quality initiatives.
• Expertise in modern automation tools.

Responsibilities

• Own test strategy and automation architecture for multiple squads.
• Lead initiatives on non-functional testing.
• Diagnose complex production issues.

Skills

Python

Java

JavaScript

Test Automation

Debugging

Performance Testing

Load Testing

Security Testing

Education

Bachelor’s degree in Computer Science, Software Engineering, or related field

Tools

WebdriverIO

Cypress

Appium

Selenium

Playwright

REST Assured

JMeter

GitHub Actions

GitLab CI

Jenkins

Job description

Overview

Ajaib is Indonesia’s leading fintech platform, 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.

Qualifications

• 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.