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

{ “@context”: “http://schema.org”, “@type”: “JobPosting”, “title”: “Senior C# Engineer – .NET, Blazor, Kafka, API, C#”, “description”: “

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

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

1 week ago Be among the first 25 applicants

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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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#J-18808-Ljbffr”, “datePosted”: “2026-04-11”, “hiringOrganization”: { “@type”: “Organization”, “name”: “Denu Recruit”, “sameAs”: “https://uk.whatjobs.com/pub_api__cpl__402736228__4861?utm_campaign=publisher&utm_medium=api&utm_source=4861&geoID=126” }, “jobLocation”: { “@type”: “Place”, “address”: { “@type”: “PostalAddress”, “addressLocality”: “Cambridge” } } }
Company: Denu Recruit
Apply for the Senior C# Engineer – .NET, Blazor, Kafka, API, C#
Location: Cambridge
Job Description:

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

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

1 week ago Be among the first 25 applicants

Get AI-powered advice on this job and more exclusive features.

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

Direct message the job poster from Denu Recruit

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

Referrals increase your chances of interviewing at Denu Recruit by 2x

Sign in to set job alerts for “Software Engineer” roles.

Front End Developer (Remote Fixed Term Contract)

Birmingham, England, United Kingdom 3 days ago

Software Engineer Intern/Co-op (Fall 2025)

London, England, United Kingdom 2 weeks ago

London, England, United Kingdom 3 months ago

London, England, United Kingdom 1 week ago

Python Backend Junior Software Engineer – Remote 4 days a week (Europe)

London, England, United Kingdom $30,000.00-$40,000.00 3 weeks ago

London, England, United Kingdom 1 month ago

Greater London, England, United Kingdom 5 hours ago

Frontend software engineer (React) – Europe Remote

Liverpool, England, United Kingdom $35,000.00-$40,000.00 1 week ago

Greater London, England, United Kingdom 1 month ago

London, England, United Kingdom 6 months ago

Hounslow, England, United Kingdom 2 weeks ago

United Kingdom $75,000.00-$100,000.00 3 weeks ago

Frontend software engineer (React) – Europe Remote

Belfast, Northern Ireland, United Kingdom $35,000.00-$40,000.00 1 week ago

London, England, United Kingdom 2 days ago

Frontend software engineer (React) – Europe Remote

Birmingham, England, United Kingdom $35,000.00-$40,000.00 1 week ago

Frontend software engineer (React) – Europe Remote

Glasgow, Scotland, United Kingdom $35,000.00-$40,000.00 1 week ago

Frontend software engineer (React) – Europe Remote

Manchester, England, United Kingdom $35,000.00-$40,000.00 1 week ago

Software Engineer (Backend or Full-Stack)

United Kingdom $100,000.00-$150,000.00 3 weeks ago

London, England, United Kingdom 3 weeks ago

Full-stack Software Dev – UK or Ireland (remote)

London, England, United Kingdom 1 week ago

London, England, United Kingdom 2 months ago

Python Backend Junior Software Engineer – Remote 4 days a week (Europe)

Manchester, England, United Kingdom $30,000.00-$40,000.00 3 weeks ago

Python Backend Junior Software Engineer – Remote 4 days a week (Europe)

Edinburgh, Scotland, United Kingdom $30,000.00-$40,000.00 3 weeks ago

We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.

#J-18808-Ljbffr…

Posted: April 11th, 2026