.Net Developer with Azure

At Madiff, we connect top IT talent with cutting-edge companies through remote Agile teams and nearshore outsourcing. With operations in Poland, Portugal, France, and the UK, we specialize in AI, DevOps, and Cybersecurity – supporting industries like Telecom, Banking, and Hi-Tech.

Are you a seasoned backend engineer passionate about building high-performance services in a cloud-native environment?

Our client in the banking and smart-shopping industry is seeking a Senior .NET Developer to strengthen the platform behind a large-scale cashback and loyalty ecosystem used by millions of users.

Key responsibilities

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

• Build and maintain RESTful APIs and microservices designed for high-traffic workloads

• Integrate backend systems with external APIs and data providers

• Work extensively with Azure Cloud (App Services, Azure Functions, AKS, Blob Storage, Cosmos DB)

• Implement unit and integration tests to ensure reliability and robustness

• Use Azure DevOps, Docker, and Git to support CI/CD and version control processes

• Cooperate closely with DevOps on optimising deployment pipelines and cloud infrastructure

• Contribute to code reviews, architecture discussions, and Agile ceremonies

• Maintain technical documentation and API specifications

What we are looking for:

• 4–5+ years of commercial experience with C# and .NET, ideally .NET 8

• Demonstrated ability to design scalable, secure REST APIs

• Solid understanding of Azure Cloud and distributed microservices environments

• Strong experience with relational databases (MS SQL Server, PostgreSQL) and ORM tools (EF Core, Dapper)

• Familiarity with Azure DevOps, Docker containers, Git, and modern CI/CD pipelines

• Knowledge of application security, error handling, and performance optimisation

• Experience working in Agile/Scrum teams and communicating with stakeholders

• Nice to have: e-commerce, cashback, or affiliate marketing background; NoSQL expertise (Cosmos DB, MongoDB); event-driven tools (Azure Event Grid, Kafka); awareness of front-end technologies

What we offer

• Flexible working model with a remote-first approach and autonomy in your delivery (1 day/ month from Warsaw on-site)

• Opportunity to contribute to a large-scale, high-impact digital product with strong market presence

• Work within a modern .NET and Azure-based engineering ecosystem

• Stable collaboration in a fintech environment that combines corporate robustness with startup agility