Senior .Net Backend Engineer

N-iX is looking for a talented Senior .Net Engineer to join our team!

Our client is one of Europe's fastest-growing mobile companies with 6 million active customers, 1,000 employees worldwide, and operations in five countries. The client is using the mobile virtual network operator business model. We are looking for a Senior .NET Engineer who combines strong technical expertise with a product mindset, proactive problem-solving, and end-to-end ownership of delivery.

Responsibilities:

Take end-to-end ownership of features and services, from requirements clarification and technical design through implementation, testing, deployment, and production support.

Deliver reliable, scalable, and maintainable back-end solutions using modern .NET technologies and engineering best practices

Understand business requirements, product objectives, and customer impact to make pragmatic technical decisions and deliver business value

Collaborate closely with Product Owners, Business Analysts, QA Engineers, DevOps, Support Engineers, Architects, Infrastructure and DB Engineers, and other teams to ensure successful delivery

Proactively identify and address technical risks, dependencies, blockers, and potential delivery challenges

Contribute to system design, architectural decisions, technical improvements, and ongoing platform modernisation

Take ownership of production issues, troubleshooting, root-cause analysis, and improvements to system reliability and performance

Ensure high engineering quality through code reviews, automated testing, observability, and continuous improvement

Confidently communicate in a multinational environment, communication is in English.

Design, build, and maintain performant, efficient, reusable, and reliable code

Translate business logic into code and automate business processes

Support and mentor other engineers, share knowledge, and promote engineering best practices

Requirements:

6+ years of commercial .NET development in Microservice environment

Strong knowledge of modern .NET (8/9 or later)

Web API, ASP.NET Core, Microservices

Strong experience with SQL, MS SQL Server, Entity Framework, and database performance optimisation

Good understanding of Docker, Kubernetes, and containerised application environments

Solid understanding of software architecture, microservices, design patterns, SOLID principles, and clean code practices

Hands-on experience with Microsoft Azure Cloud

Experience with Messaging or Evening (ServiceBus, RabbitMQ, EventHub, Kafka,. Etc.)

Experience designing and integrating REST APIs, SOAP and third-party services.

Hands-on experience with serverless architectures and cloud functions (Azure Functions, AWS Lambda)

Experience with automated testing, CI/CD practices, and production troubleshooting

Strong problem-solving skills, proactive communication, and the ability to identify risks and propose solutions

Being result-oriented, ability to get things done

Excellent verbal and written English communication skills, with the ability to confidently lead technical discussions, articulate complex topics, challenge decisions constructively, and communicate effectively with both technical and non-technical stakeholders

Would be a plus:

Production experience with durable-execution, stateful distributed-systems platform (Microsoft Orleans, Temporal, Azure Durable Task Framework, Akka, Dapr Actors, Cadence, Netflix Conductor, Erlang/OTP)

Day-to-day responsibilities involves dealing with long-running workflows, stateful coordination, distributed execution, failure recovery, retries, idempotency in production

Serious experience in Event Driven Architecture

Experience with microservice practices, i.e. Service mesh, Blue/Green deployments, ArgoCD, etc.

Experience with Stored procedures in MS SQL

Experience with .Net Native AOT

Experience with Monitoring (Azure Application Insights, Open Telemetry, etc.)

Azure LogicApps, API Apps, AKS, Redis

Experience integrating with Microsoft Dynamics CRM or similar enterprise systems

Experience working with high-availability, business-critical, or transaction-processing systems