Senior C# Engineer - .NET, Blazor, Kafka, API, C#

Denu Recruit

Cambridge

Remote

GBP 92,250 - 129,150

Full time

14 days+

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Job summary

A fintech company is seeking a Senior C# Developer for an initial 3-month contract to enhance their core banking system with scalable services and secure APIs. The role requires strong C#/.NET expertise, ideally in financial services, and offers a flexible remote work setup with optional visits to offices in Cambridge or London.

Qualifications

Proven experience in C#/.NET, ideally in regulated/financial services/core banking.
Comfortable building and consuming RESTful APIs.
Strong understanding of modern engineering principles.

Responsibilities

Build core banking functionality using C# and .NET.
Design and maintain secure, scalable Azure-hosted APIs.
Support DevOps practices with CI/CD pipelines.

Skills

.NET

RESTful APIs

DevOps

Azure

Blazor

Job description

Senior C# Engineer - .NET, Blazor, Kafka, API, C#

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This range is provided by Denu Recruit. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.

Base pay range

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Senior C# Developer (Contract) | Core Banking Systems | Remote (UK) | £Outside IR35

We’re working with a fast-paced fintech company looking for a Senior C# Developer to join their agile team for an initial 3-month contract (Outside IR35 - potential extension)

You’ll be playing a key role in implementing and transformation of a core banking system, building scalable services and secure APIs. If you enjoy solving complex problems and building tools that make an operational impact, this is a great opportunity to work at the heart of an innovative platform. This is a small team of engineers and as much as it is a contract there is a big focus on team focus.

Build core banking functionality using C# and .NET
Design and maintain secure, scalable Azure-hosted APIs
Collaborate across engineering, product and ops to ensure a smooth, efficient platform
Support DevOps practices with CI/CD pipelines and monitoring tools
They have internal interface which are built using Blazor

You’ll need:

Proven experience in C#/.NET, ideally in regulated/financial services/core banking - this is a big plus
Comfortable building and consuming RESTful APIs
To have strong understanding of modern eng principles to make impact on the engineering architecture and culture.

Work setup:

Remote-first with optional visits to offices in Cambridge or London
Flexible if you'd like occasional time onsite with the team

Start: ASAP

Location: UK-based, remote

Interested? Let’s chat — we’d love to tell you more. Or apply now with your CV.

Seniority level

Seniority level
Not Applicable

Employment type

Employment type
Contract

Job function

Job function
Finance and Information Technology
Industries
Financial Services, Banking, and Software Development

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