KWAN
KWAN is a 100% Portuguese company that is part of the Rupeal Group, dedicated to IT Staffing, consulting, and outsourcing. KWAN exists because a developer believed in a different way of recruiting: treating people with the respect they deserve. Our goal is to be your go-to place for career advice and help you reach your dream job.
About company Senior C# / .NET Developer
On-site
Porto
May 18, 2026
Full-time
We are looking for a Senior C# / .NET Developer who's eager to embark on an exciting new opportunity!
About KWAN
We connect IT professionals with projects that match their skills, professional experience, and goals, then we offer a career progression program, delivered by in-house specialists - our People Experience Partners - to guide them through our journey with us.
What you'll be doing:
- Develop and maintain microservices in .NET / ASP.NET Core.
- Design and expose high-performance, secure, and scalable RESTful APIs.
- Implement messaging solutions based on Kafka or Solace, ensuring resilience, idempotence, and event ordering.
- Apply concurrency and parallelism patterns using the Task Parallel Library (TPL), prioritizing efficiency and performance.
- Develop automated tests (unit, integration, and contract), ensuring continuous quality and adequate coverage.
- Work with relational or NoSQL databases (e.g., SQL Server, PostgreSQL, MongoDB), ensuring efficient modeling and best practices for data access.
- Contribute to the evolution of cross-functional libraries (chassis framework), ensuring consistency in logging, telemetry, security, and configuration.
- Participate in code reviews, standard setting, and continuous improvement of the development cycle.
- Collaborate with DevOps, QA, and Architecture teams to ensure robust and observable deliveries.
What you bring to the table:
- 5+ years of experience with C# / .NET 8.
- Hands-on experience with microservices, REST APIs, and messaging (Kafka, Solace, RabbitMQ, or similar).
- Experience with containers (Docker) and CI/CD pipelines (GitHub Actions, Azure DevOps, etc.).
- Familiarity with logging, observability, and tracing (OpenTelemetry, Grafana, Prometheus).
- Strong foundation in design patterns, SOLID, and Domain-Driven Design (DDD).
- Knowledge of TPL (Task Parallel Library) and asynchronous programming is a plus.
Do you meet most of the position requirements? Then grab this opportunity and apply now!Apply here
What we offer:
- A project that matches your skills and ambitions, as well as your preferences for working policies and culture.
- A competitive salary with awesome benefits and opportunities to leverage your knowledge and network to earn additional income.
- An empowering and respectful work culture enriched with social and learning events.
- A People Experience Partner specially assigned to you - your go-to career guide, responsible for supporting your growth, facilitating training, and ensuring your work-life balance at KWAN.
Some Words From Our Colleagues
“At KWAN, they make sure that I feel comfortable with the client I’m working for and that what I’m doing aligns with my career aspirations.” - Luis Caldeira, DevOps @ KWAN
Grab this opportunity, apply now!Apply here
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