Full Stack Developer (.NET + Next.js)

Portugal, PT
Mid-level (2-3 Years)
Remote/Hybrid
English Required

What is this challenge about:

  • Build and maintain backend APIs and cloud services using C#/.NET and Azure Functions.
  • Develop and maintain frontend features using Next.js, React, TypeScript, and Material-UI.
  • Integrate frontend workflows with backend APIs and OpenAPI-generated clients.
  • Work with PostgreSQL and EF Core, including data modelling, querying, and secure data access practices.
  • Support background processing workflows using Azure Storage, Queues, Durable Functions, and related Azure services.
  • Implement validation, logging, observability, error handling, and user feedback mechanisms across frontend and backend layers.
  • Create and maintain automated tests for APIs, services, and frontend applications.
  • Support CI/CD processes and local development workflows using .NET Aspire and modern frontend tooling.
  • Participate actively in Scrum ceremonies, backlog refinement, sprint planning, and incremental delivery activities.
  • Use AI-assisted development tools such as GitHub Copilot and Codex responsibly to improve delivery efficiency while maintaining code ownership and quality.
  • Collaborate with cross-functional teams to refine requirements, identify risks, and deliver scalable solutions.
  • Support deployment and configuration activities across Azure Functions, Web Apps, PostgreSQL, Storage, and monitoring services.

What we are looking for:

  • +4 years of experience with C# and modern .NET development, ideally .NET 10.
  • Strong experience with React and Next.js
  • Experience building HTTP APIs, serverless applications, or cloud-hosted backend systems.
  • Practical experience with Azure Functions or equivalent cloud-based function platforms.
  • Solid experience with EF Core and relational databases, preferably PostgreSQL.
  • Knowledge of backend patterns and libraries such as MediatR, CQRS, and FluentValidation.
  • Experience building frontend applications using component libraries, preferably Material-UI.
  • Knowledge of frontend state management, forms, validation, API integrations, and user-facing error handling.
  • Experience working in Agile software teams, preferably within Scrum environments.
  • Strong understanding of maintainability, testing strategies, production risks, and scalable software practices.
  • Practical experience using GitHub Copilot, Codex, or similar AI-assisted development tools.
  • Ability to review AI-generated code critically for correctness, security, maintainability, and performance.
  • Living in Portugal (remote role)
  • Fluent level of English.

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