C# Developer - Risk IT | Microservices & FIX (Hybrid, London)

Harvey Nash Group; Greater London; Hybrid; GBP 80,000 - 100,000; Full time

Job summary

A leading investment bank based in London is seeking a C# Developer with strong experience in Agile methodologies and enterprise solution design. The ideal candidate will possess deep knowledge of C#, REST APIs, and microservices architecture, alongside hands-on experience with FIX messaging and XML. In this hybrid contract role, you will lead discussions for architecture, conduct code reviews, and mentor junior developers. Excellent communication skills are essential.

Qualifications

• Academic background in Computer Science, Engineering, or a related field.
• Proven experience with SOLID Principles and Design patterns.
• Deep knowledge of C# .NET and RESTful services.
• Hands-on experience with FIX messaging, XML, AMQ, and ideally nHibernate, OData, and TDD.

Responsibilities

• Design and develop enterprise-grade solutions in an Agile team.
• Build and maintain middleware services using C#, REST APIs, FIX messaging, XML, and Microservices.
• Lead architecture discussions, code reviews, and release management.
• Collaborate with users and cross-functional teams to define and execute testing strategies.
• Mentor junior developers and contribute to internal best practices.

Skills

C#

Agile methodologies

REST APIs

FIX messaging

Microservices

SOLID Principles

Design patterns

Communication skills

Education

Degree in Computer Science, Engineering, or a related field

Tools

nHibernate

OData

TDD

Job description

A leading investment bank based in London is seeking a C# Developer with strong experience in Agile methodologies and enterprise solution design. The ideal candidate will possess deep knowledge of C#, REST APIs, and microservices architecture, alongside hands-on experience with FIX messaging and XML. In this hybrid contract role, you will lead discussions for architecture, conduct code reviews, and mentor junior developers. Excellent communication skills are essential.