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# Senior Software Engineer

- **Company:** Caspian One Ltd
- **Location:** London, UK
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** .NET Framework, C Sharp (Programming Language), Windows Communication Foundation, Windows Presentation Foundation, Microsoft Software, Microsoft SQL Server, GitHub Copilot
- **Published:** July 28, 2026
- **Apply:** https://www.apply4u.co.uk/jobs/x/42183398/

## About the Role

fellow developers to gather requirements and deliver solutions.Own projects and issues from design through to deployment.Produce high quality technical documentation and automated tests.Leverage tools such as GitHub Copilot and Claude to accelerate development and improve code quality.Required Skills & ExperienceStrong commercial experience with C#/.NET development.Experience working with WPF desktop applications.Strong SQL Server development skills.Experience within complex enterprise or financial services environments.Strong communication skills and the ability to work independently.Proven ability to investigate requirements, overcome blockers and drive delivery.Highly DesirableSecurities Lending / Stock Loan experience.Prime Brokerage, Delta One, Equity Finance or Equity Swaps knowledge.Exposure to trade lifecycle, settlement or post-trade systems.Experience with WCF and legacy Microsoft platforms.Knowledge of SWIFT messaging.Experience using AI-assisted development tools such as
GitHub Copilot or Claude.EnvironmentC#.NET Framework / .NET CoreWPFWCFSQL ServerJiraBitBucketBambooGitHub Copilot / Claude

## Description

Our client is seeking an experienced.NET Developer to join its Equity Technology team in London, working within a specialist Securities Finance technology group delivering strategic platform enhancements and regulatory-driven change initiatives.This role will focus on the firm's established Securities Lending platform, supporting major modernisation initiatives across stock lending, settlement processing, SWIFT messaging and T+1-related programmes. You'll work closely with developers, operations teams and business stakeholders across London, the US and Asia.Key ResponsibilitiesDevelop and enhance core Securities Finance applications.Deliver changes across a large-scale Microsoft technology estate, including WPF, .NET and SQL Server solutions.Contribute to platform modernisation and integration initiatives whilst maintaining compatibility with existing systems.Enhance settlement, messaging and trade lifecycle processing capabilities.Work directly with business users, operations teams and


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