Software Test Engineer

One2

Treat is a fast-growing tech start-up based in Louvain-la-Neuve, Belgium. We develop innovative solutions for biopharmaceutical companies to integrate multidimensional patient needs into clinical development steps and support holistic treatment decisions.

To achieve this, One2

Treat is building an integrated SaaS platform
, based on advanced statistical and AI models, designed to bring patient-centered to the heart of Pharma R&D.

One2

Treat Voice® captures patient preferences and helps identify and prioritize the outcomes that matter most to patients and clinicians. This enables sponsors to pre-specify a multidimensional endpoint aligned with real world priorities.

One2

Treat Insights® enables pharma R&D teams to analyze and interpret clinical trial data, informing strategic decision making based on the totality of evidence (e.g., dose optimization, go/no-go decisions).

By combining these tools,
One2

Treat supports smarter clinical trial design and more informed benefit and risk assessments, ultimately aligning clinical development objectives with what truly matters to patients and clinicians.

Software Test Engineer you will play a key role in ensuring the quality, reliability, and performance of our software products. You will design and execute test strategies, build and maintain automated test suites, and work closely with developers, product managers, and stakeholders to deliver high-quality releases. You will lead quality initiatives, and contribute to continuous improvement of testing processes.

• Analyze requirements, specifications, and technical designs to define test needs.
• Create comprehensive test plans, test cases, and test scenarios for manual and automated testing.
• Define and maintain test documentation aligned with QA processes and industry standards.
• Manual Testing
  • Execute functional, regression, integration, exploratory, usability and acceptance tests.
  • Identify, document and track defects using issue-tracking systems (e.g., Git Hub).
  • Validate fixes and ensure consistent reproduction of issues.
  • Collaborate with product and engineering teams to clarify expected behavior and edge cases.
• Automated Testing
  • Design, implement, and maintain automated test scripts for UI, API, and backend systems.
  • Build scalable and maintainable automated test frameworks (e.g., Cypress, Puppeteer, Playwright, Selenium, Postman/Newman, PyTest, etc.).
  • Integrate automated tests within CI/CD pipelines (e.g., Git Hub Actions, Git Lab CI).
  • Monitor automation execution and optimize test performance and reliability.
• Participate in requirement reviews, design sessions.
• Act as a quality advocate across the software development lifecycle.
• Contribute to continuous improvement of Quality Advocacy processes, tools, and standards.
• Mentor team members in best practices for testing and test automation (senior level).

• Proactively seeking to understand customer needs and listen to feedback.
• Team collaboration.
• Works independently but proactively seeks support and involves colleagues at the right moments to ensure efficiency.
• Alignment with O2T vision.

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field, or equivalent experience.
• Proven experience in software testing (3+ years for junior level, 8+ years for senior).
• Strong understanding of software QA methodologies, tools, and processes.
• Hands‑on experience with manual functional and regression testing.
• Solid experience with test automation tools and scripting languages (e.g., Type Script, Python, etc.).
• Experience with REST APIs and tools such as Postman or Swagger.
• Familiarity with CI/CD systems and Git.
• Excellent analytical, debugging, and problem‑solving skills.
• Strong communication skills and ability to work in cross‑functional teams.

• Experience testing SaaS or cloud‑native applications (AWS/Azure/GCP).
• Knowledge of performance testing (e.g., Locust).
• Experience with security testing or static code analysis tools.
• Experience in regulated environments (e.g., GxP, ISO standards) — if relevant to your organization.

At One2

Treat, we’re on a mission to revolutionize treatment decision‑making…