Senior .NET Developer

5 days ago


Remote, Czech Republic Cognitran Sp. z o.o. Full time

To excel in this role you need to:

  • 5+ years of professional experience in C#/.NET development.
  • Strong knowledge of .NET MAUI or Xamarin.Forms.
  • Experience writing and maintaining automated tests (unit and integration).
  • Expertise with relational databases (PostgreSQL preferred) — schema design, complex SQL, and performance tuning.
  • Practical experience with AWS services, especially serverless (Lambda, SQS).
  • Proficient with Entity Framework Core and modern REST API development.
  • Comfortable working with Git, CI/CD workflows, and Agile teams.

Nice to Have:

  • Experience with SaaS architecture (modular design, multi-tenant setups).
  • Familiarity with secure authentication methods (OAuth2, JWT).
  • Exposure to localization/internationalization (multi-language support).
  • DevOps mindset and experience with infrastructure-as-code tools.

Senior .NET Developer (SaaS / Cloud / Multi-Tenant)

Remote | Full-time | Competitive Salary + Benefits

We're looking for a Senior .NET Developer to join our growing team and take ownership of designing and building robust, scalable SaaS applications. You'll work across the full development lifecycle — from design to deployment — with a focus on clean, testable code, cloud-native development, and real-world business impact.

What You'll Do

  • Build modular, maintainable, multi-tenant SaaS solutions using .NET MAUI and .NET Core.
  • Write clear, test-friendly code — with strong coverage across unit and integration tests.
  • Design and optimize PostgreSQL schemas and queries for performance and scalability.
  • Develop backend services using AWS LambdaSQS, and other AWS components.
  • Implement data access layers using Entity Framework Core.
  • Support multi-language interfaces and collaborative workflows across diverse user roles.
  • Contribute to and maintain CI/CD pipelines (AppVeyor, GitHub Actions).
  • Work cross-functionally with product, QA, and UX to ship features end-to-end.
  • Participate in code reviews, architectural discussions, and continuous improvement.

Why Join Us

  • Work on a real-world product used by thousands every day.
  • Flexible work hours and remote-first culture.
  • Professional development support (certifications, conferences).
  • Collaborative, low-ego team focused on impact and quality.

Apply now if you're ready to make a difference with high-quality software in a modern, cloud-first environment.

Cognitran is an industry-leading software company with a variety of clients in the automotive sector. As part of our ongoing expansion, we have an excellent opportunity for a Software Developer to join the organisation. Our headquarters are in Essex, UK with additional offices in Coventry, Poland and the USA. This is an office based or remote position but office presence and travel will be required whenever the need arises, e.g. Product Increment Planning, team building etc

,[Build modular, maintainable, multi-tenant SaaS solutions using .NET MAUI and .NET Core. , Write clear, test-friendly code — with strong coverage across unit and integration tests. , Design and optimize PostgreSQL schemas and queries for performance and scalability. , Develop backend services using AWS Lambda, SQS, and other AWS components. , Implement data access layers using Entity Framework Core. , Support multi-language interfaces and collaborative workflows across diverse user roles. , Contribute to and maintain CI/CD pipelines (AppVeyor, GitHub Actions). , Work cross-functionally with product, QA, and UX to ship features end-to-end. , Participate in code reviews, architectural discussions, and continuous improvement. ] Requirements: .NET, SaaS, Cloud, .NET CORE, Integration test, PostgreSQL, AWS, AWS Lambda, Amazon SQS, Entity Framework, GitHub, QA, DevOps Tools: Jira, Confluence, GitHub, Bitbucket, Sonar, GIT, Jenkins, Agile, Scrum, Kanban. Additionally: Integration events, Flexible working hours, Training budget, Sport subscription, Private healthcare, Flat structure, International projects, Conference budget, Free coffee, Gym, Bike parking, Playroom, Free snacks, Free beverages, Shower, Free parking, Modern office, No dress code.
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