Mid/Senior Platform Engineer (.NET)
About the role
Retail group's digital and technology company operating across multiple markets. The role sits within a Dev Platforms team under Architecture, Infrastructure & Platform Engineering, focused on building the tools and infrastructure that let engineering teams test their own code autonomously and at scale across a large application ecosystem.
What you will do
- Develop automation, tools and utilities that improve the technical health of products and engineering practices.
- Build and evolve test infrastructure covering CI pipeline integration, execution in ephemeral environments and device farms, parallelism, and risk-based test selection.
- Expose test results as data (duration, failure rate, coverage per capability, execution cost) so teams can track their own suite health autonomously.
- Integrate AI capabilities into the testing workflow, such as assisted test case generation, failure diagnosis, and suite maintenance, ensuring outputs are deterministic, versioned, and reviewed.
- Diagnose and remediate flaky tests, including quarantine strategies and suite lifecycle management.
- Act as a technical reference and advocate for test engineering practices across engineering and product teams.
Location and work model
- Hybrid (2 days/week in the office, Porto)
What are we looking for?
- Software development and test methodology experience — 8+ years
- Proven experience building tools and infrastructure used by other engineering teams
- .NET or equivalent programming language
- Git and peer review practices, with library design for third-party use
- CI/CD and test automation, including pipeline design, parallelization, and execution optimization
- Experience diagnosing and remediating non-deterministic (flaky) tests
- Experience with containers, ephemeral environments, and device farms
- Hands-on experience with web and mobile automation frameworks (e.g., Appium, Playwright, WebDriver IO)
- Solid knowledge of contract and integration testing and test pyramid effort distribution
- Experience with synthetic monitoring and observability for continuous production validation
- English B2
- Portuguese
Nice to have
- Relevant technical certifications (e.g., ISTQB Test Automation Engineering, cloud or Kubernetes certifications)
- Experience with DevOps and GitOps methodologies
- Experience with performance and load testing, including peak profile modelling
- Knowledge of Product Thinking applied to platforms and developer experience metrics (e.g., DORA, SPACE)
- Hands-on profile
- Ability to influence engineering teams without formal authority
About KWAN
At KWAN, your career is bigger than one project. You join a real team, on a long-term project, at a company where technology is the business. And when you are ready for something new — a new stack, a new industry, a bigger role — we find that next step with you, without you having to start over somewhere else.
From day one you have a dedicated People Experience Partner: one person accountable for your growth, not your allocation. They know where you want to go, and they help you get there.
You keep learning as technology moves (AI included). Your impact is seen and recognised. Pay and expectations are talked about openly. And you work remote-first, with hubs in Lisbon and Porto for when you want people around.
Grow with clarity. Be treated with respect. Build things that matter.
Apply — if your profile is a match for this role, you will hear from our Talent team within 48 hours. If it is not the right match this time, we will reach out as soon as we find a role that fits you better.
