C# .Net Core Developer – Fintech50

Company: Quant Capital
Apply for the C# .Net Core Developer – Fintech50
Location: London
Job Description:

Overview

In this role you will develop and maintain a new, globally-focused platform for high-volume payments. You will work alongside cross-functional teams to deliver a scalable backend in .NET Core and a responsive frontend, supporting a fast-paced fintech environment. You’ll help shape usability and performance for a high-demand gateway, with a focus on modern web tech and robust APIs. The position offers strong training, a open culture, and potential for financial growth through bonus and options.

Pay / Benefits

  • flexible working
  • pension
  • bonus
  • options
  • training and development
  • casual dress code

Responsibilities

  • Greenfield platform development for a global payments gateway
  • Production, modification, and maintenance of websites and web applications
  • Develop usability and perform testing for new and existing websites
  • Frontend work with HTML5/Angular and backend with .NET Core/ASP.NET MVC
  • Work within a high-performing agile SCRUM team
  • Engage with REST APIs design-first approach and OpenAPI standards
  • Possibly work with noSQL and Oracle via Entity Framework

Key requirements

  • Solid background in .NET development (C#)
  • Experience with .NET Core
  • Full stack development skills
  • Experience with REST APIs, design-first approach, OpenAPI
  • Strong experience with Oracle and Entity Framework
  • Knowledge of event-based systems; Kafka advantageous
  • Experience building Angular front ends (Angular 8+)
  • Experience in a high-performing agile SCRUM team
  • driven and proactive
  • team player
  • customer-focused usability mindset
  • .NET Core
  • ASP.NET MVC
  • C#

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Posted: October 1st, 2026