Senior Backend Developer (.NET)

Nexi is Europe's PayTech company operating in high-growth, attractive European markets and technologically advanced countries. Listed on Borsa Italiana's MTA, Nexi has the scale, geographic reach and abilities to drive the transition to a cashless Europe. With its portfolio of innovative products, e-commerce expertise and industry-specific solutions, Nexi provides flexible support for the digital economy and the entire payment ecosystem globally, across a broad range of different payment channels and methods. Nexi’s technological platform and the best-in-class professional skills in the sector lets the company operate at its best in three market segments: Merchant Services & Solutions, Cards & Digital Payments and Digital Banking & Corporate Solutions. Nexi constantly invests in technology and innovation, focusing on two fundamental principles: meeting, together with its partner banks, customer needs and creating new business opportunities for them. Nexi is committed to supporting people and businesses of all sizes, transforming the way people pay and businesses accept payments. It offers companies the most innovative and reliable solutions to better serve their customers and expand. By simplifying payments and enabling people and businesses to build closer relationships and grow together, Nexi promotes progress to benefit everyone.

• Successfully completed university degree in computer science or a comparable field of study.
• 5+ years of experience with C# and .NET / ASP.NET Core, including building microservices and working with distributed systems at scale.
• Strong experience with Entity Framework Core and MSSQL (schema design, performance).
• Practical hands-on experience with Kafka for data streaming and event-driven communication.
• Familiarity with agile practices (Pairing, TDD, BDD, CI/CD).
• Fluency in Polish and very good communication skills in English.
• Availability to work in a remote/hybrid setup, with one office visit per month for remote workers.

• Work on a next-generation payment processing system built on a modern .NET microservices architecture.
• Design, develop and deploy backend services with a strong focus on security, high availability and quality.
• Collaborate in a dynamic, autonomous setting within small, agile (SAFe) and cross-functional teams.
• Use the latest Microsoft technologies to solve real-world challenges for customers operating at significant scale.
• Share expertise, contribute to technical discussions and help the team continuously evolve development best practices.