.NET Backend Developer

Cluj-Napoca, RomaniaFull-timePosted Aug 6, 2026

At Mindera, we believe that software is built by people, for people, with high-performance systems that impact users worldwide.

We are looking for a .NET BACKEND DEVELOPER to join an agile, collaborative team where your voice matters as much as your code.

As a Backend Engineer you’ll be part of the development of core platform systems that expose data for desktop and mobile applications. We’re looking for engineers with an appetite for solving complex and interesting problems to world-class standards.

We value empathy, self-organization, and a positive attitude. If you are approachable, communicate clearly, and believe that team fit is just as important as technical prowess, you'll feel right at home here.

At Mindera we encourage the use of AI to assist with coding and related tasks. We find a persons skill in engineering and software craft, has a big impact long term successful delivery, with or without AI. Our goal in the interview process is to understand the candidates knowledge and skill with engineering. If you need to, or plan to use AI, please be transparent with us when you're using it, to avoid issues and misunderstandings that can either: impact your chance of securing the role or impact your success at Mindera.

When you join Mindera we welcome you into a fun and politics-free work culture, built on the principles of lean and self-organisation.

Note: Depending on the project and our clients' needs, you may get the chance to pack your bags and take off every now and then. Typically, we estimate travel time to be between 0% and 15%.

Requirements

HOW YOU’LL MAKE AN IMPACT:

Your role goes beyond writing C# code. You are expected to own the delivery pipeline end to end:
Refinement: Challenge ambiguous business requirements, analyse acceptance criteria, and ensure technical feasibility.
Architecture: Design decoupled, scalable solutions using Event-Driven Architecture (EDA) patterns.
Execution: Write highly concurrent, thread-safe applications using .NET 8 or later, with a strong preference for composition over inheritance.
Verification: Treat Test-Driven Development (TDD) as an essential engineering practice by writing robust unit and integration tests using xUnit and WireMock to prevent regressions.
Delivery & Operations: Deploy through modern CI/CD pipelines and proactively monitor production telemetry using tools such as AWS CloudWatch, New Relic, and GitHub Actions to ensure rapid troubleshooting and operational excellence.

YOUR SKILLS & EXPERIENCE:

Engineering Seniority: 5+ years of experience designing and deploying complex, high-throughput backend systems using .NET.
Cloud-Native Expertise: Deep, hands-on experience with AWS, particularly containerized workloads (ECS/EC2) and messaging services (SQS/SNS).
System Design Mastery: Strong understanding of SOLID principles, dependency injection lifetimes, and the ASP.NET Core middleware pipeline.
Concurrency Discipline: Expert knowledge of asynchronous programming in C#. You understand how the thread pool works and why synchronous blocking (for example, using `.Result` or `.Wait()`) can severely impact the scalability and reliability of web APIs.
API Design: Strong understanding of RESTful APIs, idempotent operations, and global exception-handling strategies.
Communication: Advanced or fluent English, with the ability to clearly communicate architectural decisions and technical trade-offs to stakeholders and cross-functional teams.

Nice to have:

Production experience with streaming platforms such as Kafka, Kinesis, or RabbitMQ.
Strong understanding of AWS services and cloud-native architectures.
Practical experience with LLMs and Generative AI using .NET or Python, particularly for AI-assisted engineering workflows and SDLC automation.

We'd love to get to know you better!

Benefits

THE PERKS OF BECOMING A MINDER:

Private medical subscription
Private medical subscription for children
Counseling and psychotherapy services
Reimbursement for eyeglasses
Self-proposal salary process
Annual profit distribution, subject to company performance and board decision
Mindera Unit Plan
Flexible benefits options (sports, medical, cultural, donations)
Trainings and learning opportunities to grow within your role
Coaching and development guidance
25 days holiday
Flexibility to choose where you work from
Vacation incentive
Parties, gatherings & trips

WHY MINDERA?

We're thrilled to have the opportunity to share with you what it's like to be a part of the Mindera community.

We're a group of friendly and talented individuals who work together to bring projects to life, in a fun, politics-free environment.

Our culture is all about being adaptable and self-organized. We want Minders to take risks, make decisions, work together and feel free to be their most authentic selves, every single day.

We work closely with our clients to truly understand their products and develop high-performance, resilient, and scalable software systems that make a real impact for their users and businesses, worldwide.

We are proud of our work, we're always learning and growing in our Agile and collaborative environment, and we hope you'll love it here just as much as we do!

Check out our Handbook & get to know us better: https://mindera.com/handbook.pdf