For our office in Leuven or Espoo, or remote, we are looking for highly qualified and motivated professionals like you. If you think you have what it takes to keep Septentrio firmly in Pole Position, get in touch. 

We need you for the position of 

Software Developer in Test

The Job

As a Software Developer in Test (SDET), you create and maintain automated testing frameworks, write test code, and design test plans to identify defects and ensure software quality. The role blends software development and quality assurance skills, with a strong focus on building tools and systems that enable continuous testing.

You work closely with software developers to integrate testing into the development lifecycle, supporting faster feedback and more reliable releases. Key responsibilities include designing test cases, developing and maintaining test automation infrastructure, executing manual and automated tests, analyzing results, and reporting defects to improve product reliability and efficiency.

Unlike traditional QA roles, this position emphasizes coding for testing and embedding quality directly into the development process, rather than test execution alone.

Your Mission

Test Automation: Design, develop, and maintain automated test frameworks and test scripts covering unit, integration, system, and performance testing.

Test Planning & Design: Create comprehensive test plans, test scenarios, and test cases based on product requirements, technical specifications, and risk analysis.

Quality Integration: Embed quality into the software development lifecycle by working closely with developers to ensure testability, reliability, and early defect detection.

Code & Design Review: Participate in code and design reviews, providing constructive feedback to improve test coverage, robustness, and maintainability.

Bug Management: Identify, document, track, and help resolve software defects by collaborating closely with development teams.

Test Infrastructure & CI/CD: Build, maintain, and improve test automation infrastructure, including integration with continuous integration and continuous delivery pipelines.

Reporting & Analysis: Analyse test results, report quality metrics, and provide clear insights to development teams and stakeholders.

Process Improvement: Continuously improve testing tools, practices, and workflows to enhance product quality and delivery efficiency.

Your Qualifications

Technical Skills

• Strong programming skills in Python.
• Experience with test automation frameworks and tools (e.g. Robot Framework, Selenium, JUnit, LoadRunner, JMeter, or similar).
• Experience designing test cases and developing or maintaining automated test frameworks and infrastructure.

Software Development & Quality

• Solid understanding of the software development lifecycle and quality assurance practices.
• Experience working in Agile development environments and collaborating closely with software developers.
• Ability to analyze test results, identify defects, and support efficient issue resolution.

Personal Attributes

• Strong analytical and problem-solving skills with attention to detail.
• Clear communication skills and a collaborative mindset.
• Structured, quality-driven, and proactive in improving testing practices.

Our Offer

In exchange for your talent, we offer a very competitive compensation package in a top-notch high-tech, international working environment. At Septentrio you’ll have room to grow, both personally and professionally. Our on-boarding plan is legendary, our homework policy family-friendly. Get in touch and help us shoot for the moon, the stars and beyond.