Randstad Technologies
Senior C# / .NET Developer (Securities Lending & Repo)
- Role Type: 6-Month Contract
- Location: London (Hybrid – 3 days onsite per week)
- IR35 Status: Inside IR35
Role Overview
A leading global financial services and asset servicing institution is seeking an experienced Senior C# / .NET Developer to join a business-critical technology team in London.
This role focuses on designing, building, and supporting high-performance platforms for the firm's financing-related businesses, with a primary emphasis on Securities Lending and Repo workflows.
Required Skills & ExperienceCore Technical Skills:
- Strong hands-on expertise in C# and .NET / .NET Core.
- Deep understanding of Object-Oriented Programming (OOP) and architectural design principles.
- Proven experience building and implementing REST / JSON APIs.
- Solid experience with relational databases (e.g., SQL Server).
- Familiarity with unit/integration testing and automated CI/CD pipelines.
Financial Domain Knowledge (Essential):
- Proven background in Financing platforms, specifically Securities Lending, Repo, or Collateral/Margin management.
- Strong general knowledge of financial markets, with a specific focus on equities and bonds.
- Prior exposure to complex, highly regulated capital markets or financial services environments.
Nice to Have:
- Experience with cloud platforms (AWS / Azure).
- Exposure to messaging technologies like Kafka
If interested, please apply here ASAP or share your updated resume to
Randstad Technologies is acting as an Employment Business in relation to this vacancy.
To apply for this job please visit www.reed.co.uk.
Make this application stronger
Use these quick checks before applying so your CV, interview preparation and job search are better matched to this vacancy.
Before you apply
Check the key details and make sure the role matches what you are looking for.
- Review the job title, company, location, salary and working pattern if provided.
- Check the skills, experience or qualifications requested by the employer.
- Make sure the commute, hours and contract type are realistic for you.
Tailor your CV
For IT Jobs, highlight the most relevant skills, experience and achievements linked to this type of work. Keep it honest, clear and focused on what the employer is asking for.
Use the CV Builder or browse Career Advice.
Prepare for interview
If your application is successful, prepare simple examples that show your motivation, strengths and suitability.
Keep searching smarter
Do not rely on one application. Keep searching similar roles and set up alerts so new vacancies reach you faster.