Senior C# .NET Developer

FISLondon, United Kingdomlast year

We are looking for an experienced Senior C# .NET Developer to help grow and enhance our PTP software platform. The candidate will work on strategic enhancements to the platform as well as on client implementation projects. The PTP Platform is a leading-edge, cloud-based Securities Processing solution that provides trade lifecycle processing for a wide range of global financial institutions.

About the team: As a Senior C# .NET Developer, you’ll be part of our PTP Platform development group. The group is broken into smaller scrum teams that each hold responsibility for a key area of system functionality. You’ll become involved with all phases of the development lifecycle and take ownership of key functional areas.

What you will be doing:

As a Senior C# .NET Developer, you will be involved in:

Analysis of user requirements and translation into solution design using the most appropriate technique for the job (including mockups and POCs)
Accurate task breakdown and estimation
Implementation of new components, services and screens that are configurable, extensible and testable
A focus on quality and shipping working code to users in the most efficient timeframe
Collaborate on code reviews and best practice within a small, agile, focused team
A willingness to mentor other team members, undertake support, QA or other tasks as required to contribute to the team

What you will need:

7+ years of commercial software development experience using C#/.NET, including algorithms, data structures and architecture
Experience using SQL databases (Oracle preferred)
Relevant degree in a numeric discipline, or equivalent work experience
Excellent written and spoken English
Linux experience

Beneficial to also have:

C++ experience
Full stack Experience including building UIs / SPAs
Experience with the Blazor framework / Winforms
Experience of financial markets and the trade lifecycle

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FAQ

Is the Senior C# .NET Developer position at FIS remote?: Yes. This role was posted on Remote Frontend Jobs, a job board that lists exclusively fully remote positions.
When was this Senior C# .NET Developer job posted?: This listing was posted on June 23, 2025 and is still open for applications.
How do I apply for the Senior C# .NET Developer position at FIS?: Use the apply button on this page — it takes you directly to the employer’s application page.