Senior .NET Developer (with AZURE)

We are looking for a Senior .NET Developer to join a high-scale smart-shopping and cashback platform serving millions of users. The role focuses on building and optimising backend services supporting cashback, loyalty, affiliate, and e-commerce functionalities within a modern Azure-based microservices environment.

This is a hands-on backend engineering role requiring strong experience with .NET, Azure Cloud, REST APIs, and scalable distributed systems operating in a high-traffic production environment.

Responsibilities:

• Develop and maintain backend services using.NET 8 and C#

• Design and build RESTful APIs and microservices for high-traffic use cases

• Integrate systems with third-party APIs and data providers

• Work with Azure cloud services (App Services, Azure Functions, AKS, Blob Storage, Cosmos DB, etc.)

• Implement unit and integration tests to ensure code quality and reliability

• Work with Azure DevOps, Docker, and Git for CI/CD and version control

• Collaborate with DevOps to optimise deployment pipelines and infrastructure

• Participate in code reviews, architecture decisions, and sprint planning

• Maintain documentation of backend architecture and API specifications

Requirements

• Minimum 4-5 years of experience in backend development with C# and .NET (latest version .NET 8 preferred)

• Proven experience designing scalable and secureREST APIs

• Strong knowledge ofAzure Cloud and microservices architecture

• Experience with SQL (MS SQL Server, PostgreSQL) and ORM tools such asEntity Framework Core orDapper

• Familiarity withAzure DevOps, Docker containers, Git, and CI/CD pipelines

• Good understanding of application security, error handling, and performance optimisation

• Ability to work in Agile/Scrum teams and communicate with business and technical stakeholders

Nice to Have:

• Experience withe-commerce,affiliate marketing, orcashback platforms

• Exposure toNoSQL solutions like Cosmos DB or MongoDB

• Experience with Event-Driven Architecture, e.g. Azure Event Grid or Kafka

• Familiarity with front-end technologies (React, Angular) for collaboration purposes

Benefits

• Solid, competitive salary
• Work in a multinational environment on international projects
• Comprehensive healthcare
• Long-term B2B contract with a stable project pipeline
• Work model: fully remote (1-2 times/monthinWarsaw)
• Work on a large-scale, high-impact product with strong market presence
• Be part of a modern .NET development environment in a cloud-first organisation
• Collaborate in a stable, secure fintech setting with the speed of a startup
• Enjoy flexible working and ownership of your development responsibilities