Senior .Net Full Stack Developer

Lisbon, Portugal
Senior (4-6 Years)
Hybrid
English Required Not Accepting Candidates Living Abroad
About the Role
We are looking for a Senior .Net Full Stack Developer to join our team and help design, build, and support high-quality enterprise applications. In this role, you will work across both frontend and backend technologies, contributing to the full software development lifecycle: from requirement gathering and technical analysis to development, testing, deployment, and production support.
You will play an important role in delivering scalable, secure, and maintainable solutions while collaborating with cross-functional and international teams in an Agile and DevOps-driven environment. This is an excellent opportunity for a proactive professional who combines strong technical expertise with ownership, teamwork, and a continuous improvement mindset.
 
Key Responsibilities
  • Design, develop, maintain, and enhance full-stack web applications.
  • Build and integrate RESTful APIs across enterprise platforms.
  • Gather, analyze, and refine business and technical requirements.
  • Contribute to technical decisions and help prioritize development activities.
  • Develop frontend solutions using React, Angular, JavaScript, and legacy technologies where needed.
  • Develop backend solutions using .NET Core, .NET Framework, and C#.
  • Work with SQL Server and related data access technologies.
  • Perform unit testing and integration testing to ensure quality and reliability.
  • Participate in release and deployment management activities.
  • Support and improve CI/CD pipelines and DevOps practices.
  • Troubleshoot and resolve production incidents, including high-priority issues.
  • Manage and contribute to risk, issue, incident, and problem resolution.
  • Ensure adherence to coding standards, development guidelines, naming conventions, templates, and reference implementations.
  • Produce and maintain clear technical documentation.
  • Collaborate effectively within the team and across distributed, cross-functional, and international teams.
 
Required Qualifications
  • Degree in Computer Science, Software Engineering, Information Technology, Engineering, or a related technical field.
  • 5 to 8 years of relevant professional experience as a .Net Full Stack Developer.
  • Strong expertise in .NET Core/Framework/MVC and related frameworks.
  • Solid experience with React, Angular, JavaScript, and working with older or legacy technologies when required.
  • Strong knowledge of SQL and ORM tools such as Entity Framework.
  • Experience working in production environments and supporting live business applications.
  • Hands-on experience with CI/CD, Azure DevOps, Jenkins and Git.
  • Understanding of authentication mechanisms and core security principles.
  • Experience in development, unit testing, and integration testing.
 
Professional Skills
  • Strong team player who collaborates effectively within and across teams.
  • Proactive mindset with strong ownership and accountability.
  • Good knowledge of Agile ways of working.
  • Experience in documentation and standards ownership, including guidelines, reference implementations, naming conventions, and templates.
  • Structured approach to release management, incident management, and problem-solving.
  • Ability to work effectively in a dynamic, fast-paced environment.
  • Experience with requirement gathering, analysis, and solution design.
  • Strong skills in decision-making, prioritization, and communication.
 
 
Language Requirements
  • Professional proficiency in English speaking and writing (at least B2 level).
  • Dutch and/or French is a strong plus.
 
Tools
  • Productivity & Collaboration: MS Office, SharePoint, Confluence
  • Tracking & Support Tools: ServiceNow, Jira, Target Process (project management / user stories), Visual Studio
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 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.
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
At KWAN, I’m given the space to be myself and do what I love. I have control over the projects I work on, as well as the direction of my career.
Pedro Fonseca, Front End Developer @ KWAN
I see my People Experience Partner as someone who is always available to provide me with motivation and constant feedback, which helps me be sure that I am in the right place.
Josimar dos Reis, Software Developer @ KWAN
I know that I’ve contributed to the growth of a company that truly values a “people first culture”, because my ideas, experiences, and individuality were always appreciated.
João Nascimento, Software Developer (KWAN Alumni)
My two years at KWAN were an incredible experience! From the start, I was welcomed into a warm and collaborative environment where I felt truly supported.
Laís Ortiz, Software Developer @ (KWAN Alumni)
Grab this opportunity, apply now!

What You Can Expect as a KWANer

Respect isn’t optional here

You’re trusted to deliver and supported to speak up.

Dedicated People Experience Partner

Someone accountable for your growth, not your allocation.

Continuous learning, built in

Learning that keeps pace with the systems you build.

Recognition that’s visible

Your impact doesn’t go unnoticed. Through our Rocket Points System, we constantly recognize your contributions.

A culture you can feel

From movie and quiz nights to dinners and our annual summer gathering, we don’t just work together - we build real connections.

Flexible spaces to work your way

Remote-first, with physical hubs when you want connection.

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