Senior Backend Developer (Alternative Payment Methods)

Why join us in 2025?
Think of the vast network of digital wallets, QR code payments, BNPL, Account-to-Account solutions, and invoicing methods that power everyday transactions. At Nexi, we don’t build these payment methods — we integrate best-in-class APMs into a centralised library that supports Nexi Payment Platforms and their merchants across multiple countries and channels. While eCommerce is our primary focus today, we are also exploring how APMs can enhance the in-store experience at POS terminals.

About us and our team
The Nets|Nexi eCommerce unit is European in scale, yet local in nature. Our ambition is to be the leading e-commerce provider in Europe, expanding on our existing leading position in the Nordics, Italy, and Poland. We believe that to do so, we need to be Fintech at heart and have strong local presence and expertise. This ambition is supported by a strong multinational team and a substantial investment in R&D. 

About your future role
You’d join backend-first team building the core Alternative Payment Methods library used across multiple PSPs in the Nexi Group. Every integration you deliver directly impacts merchants and consumers, shaping how millions of people pay. 

You’ll tackle complex backend challenges at Pan-European scale — from seamless API orchestration to ensuring reliability, security, and performance in high-volume environments. With Nexi’s global reach — born from the merger of leading payment companies — you’ll have unparalleled opportunities to learn, grow, and collaborate with experts shaping the future of digital payments across Europe.

Engineering at Nexi is an inspired, customer focused community, excited about crafting solutions that redefine our industry. Working in small, highly collaborative and cross functional Agile teams, you and your team will have a clear mission and ownership of an important outcome that supports Nexi and our customers. We optimise for quality, flow, fast feedback, focusing on end-to-end ownership, continuous improvement, testing, monitoring and experimentation. We aim for teams that are inclusive, collaborative, and have a solid sense of ownership for the things they build. 

Our engineers make some of the most significant decisions for the company and we are looking for forward thinking, open and curious developers.  

Your key responsibilities in this role will be:
As a Senior backend .Net Developer on our team, you’ll be part of a greenfield journey — not starting from zero but shaping a payments library that will be used across multiple PSPs in the Nexi Group. To succeed here, you’ll be expected to live up to our team standards:

• Collaborate with respect and ownership — actively contribute to discussions, challenge ideas constructively, and take responsibility for outcomes
• Document everything — make documentation a first-class deliverable, ensuring clarity and continuity for the team and future maintainers
• Embrace a startup spirit — stay pragmatic, proactive, and ready to adapt as we grow into new areas like POS
• Influence the team for right design and technology implementation & give future architectural direction

What makes you the best person for this job?
Now when you read about the role, are you curious to discover more? If your answer is yes, check what qualifications make you the right candidate to apply. But keep in mind one thing - on top of your skillset, knowledge and experience, it's your potential that makes a difference for you to achieve your goals in everyday work.
 

Qualifications needed to be successful in this role:

• You are use to build, deploy and operate world class systems while addressing privacy, regulatory and security concerns
• Extensive experience with C#, .NET Core, and ASP.NET Core, Docker, gRPC.
• Experienced in software design and application architectures e.g Domain Driven Design, Event Driven & Microservices Architecture.
• Strong knowledge of cloud-based solutions e.g. in Azure (Cosmos DB, Entra Id, Service Bus, Kubernetes, etc.).
• Strong knowledge of security and performance optimisation
• Good at source code management, continuous integration and continuous deployment
• Able to think far in advance for the development of multiple platforms: spotting problems, bottlenecks and being able to thrive in a quick iterative delivery  

Additional skills and experience that would make you stand out:

• Natural curiosity about Payment industry market trends 
• A solid knowledge of building world class scalable solutions 
• A knowledge of architectural designs that work well in regulated environments
• Deep understanding of the lifecycle of software development
• Interest in AI and edge cutting tech trends in the payment industry

Even if you don’t check every box, your unique potential and willingness to learn could set you apart.

What’s in it for You?

• Attractive salary and a competitive benefits package to reward your expertise and contributions 
• Tech equipment: Get the tools you need to succeed, including the latest technology to support your work
• Join an international team: Collaborate with experts from across Europe and bring your ideas to life in a dynamic, global environment 
• Grow and develop: Gain hands-on experience and structured training through our PayTech University, designed to accelerate your career and help you reach your full potential

Discover Life at Nexi
We’re an international team of 10,000+ people across 25 countries, united by shared ambition and a passion for innovation. Learn more about our culture, Values, and how we’re shaping the future of digital payments. Visit our Life at Nexi page.

• Diversity and Inclusion at Nexi
• We are proud to be an equal opportunity employer: together, we succeed by embracing our differences and creating a future where everyone can thrive. 
• Your Next Step Starts Here
• If this opportunity excites you, we’d love to hear your story. Submit your application today, and let’s shape the future of digital payments together!