Senior .NET Developer

Portugal, PT
Senior (4-6 Years)
Remote
English Required Portuguese Required

What is this challenge about:

  • Lead the design, development, and maintenance of complex, high-performance solutions within the .NET ecosystem.
  • Architect and implement scalable, secure, and reliable backend systems.
  • Design, develop, and manage robust data integration processes using SQL Server Integration Services (SSIS).
  • Optimize, maintain, and troubleshoot SQL Server databases to ensure high availability, performance, and scalability.
  • Define and promote software architecture standards, development best practices, and technical guidelines.
  • Ensure code quality through code reviews, testing strategies, and adherence to engineering standards.
  • Collaborate with cross-functional teams to translate business requirements into technical solutions.
  • Identify performance bottlenecks and implement optimization strategies across applications and databases.
  • Support system enhancements, migrations, and modernization initiatives.
  • Contribute to technical decision-making and continuous improvement initiatives throughout the software development lifecycle.

What we are looking for:

  • Bachelor degree in Computer Science, Business Informatics, or a comparable qualification.
  • Minimum of 15 years of professional experience in .NET development.
  • Extensive expertise in the .NET ecosystem and backend application development.
  • Strong experience with SQL Server database administration, optimization, and performance tuning.
  • Deep knowledge of SQL Server Integration Services (SSIS) and data integration solutions.
  • Proven experience designing and implementing scalable enterprise-grade systems.
  • Strong understanding of software architecture principles, design patterns, and best practices.
  • Experience troubleshooting complex application and database-related issues.
  • Ability to work closely with technical and business stakeholders to deliver effective solutions.
  • Strong analytical, problem-solving, and decision-making skills.
  • Living in Portugal (Remote role)
  • Fluent level of English and Portuguese

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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Tell Us About You

We review every application. If there’s alignment, we won’t let it get lost in a database.