1 to 25 of 42 Senior C# Developer Jobs in London

Senior Technical Java and C# .net Software Developer We are currently recruiting a Java with C# .net Senior Software Developer – who can be the lead in the team. You must have at least 5 to 7 years proven track record of developing software with Java and C# .net framework … business acumen, and customer focus. · Provide governance for troubleshooting complex system issues as necessary · Develop or contribute to business cases, roadmaps and proposals which may include presentations to senior management. · Collaboration with Business, Technical, and Security Architects, to manage risk identification and risk mitigation tactics associated with the designs. Role-specific knowledge: · 5+ years of senior technical lead. · 5+ years of strong hands-on experience as a developer working on JAVA or .NET Framework standards and technologies - C#.NET, ASP.NET, AngularJS, SQLServer, Web Services, Cloud Platforms, AJAX, JQUERY, XML/JSON, HTML, CSS · Retail/digital technology experience is essential · Experience in SalesForce Service and Marketing Clouds · Safety Knowledge: · Provides a consistent outstanding More ❯

Social network you want to login/join with: Sr. C#.Net (core) developer to support support team in delivering bug/fixes, operational enhancements, and new functionality to existing in-house software, London col-narrow-left Client: S.i. Systems Location: London, United Kingdom Job Category: Other - EU work … permit required: Yes col-narrow-right Job Reference: ddd7fb030e85 Job Views: 3 Posted: 29.06.2025 Expiry Date: 13.08.2025 col-wide Job Description: Our valued client is looking for a Sr. C# .Net (core) developer to support support team in delivering bug/fixes, operational enhancements, and new functionality to existing in-house software This is a remote opportunity … Solutions Support team(s) and contribute to Level 3 Support activities for Incident and Problem resolution as required Must have: 7+ years’ experience building APIs and web applications in C# (.netcore) 5+ years’ experience programming for SQL Server and EF Core 3+ years designing, coding, and testing single-page applications utilizing the Angular v4+ framework, utilizing Bootstrap v4/ More ❯

Role – C# Full-Stack Developer London based – 3 days office Salary £85k - £100k My client is a family run financial investment company that have been assisting the investment of their client’s capital for over 30 years, managing portfolios. As a business their purpose is to grow and protect not only client’s capital but also their … SQL, and moving old API’s to a newer web stack whilst working across all areas of the business internally and across a range of projects with stakeholders. Experience: C# .NET, Strong development in .NET, C# and LINQ, Experience of developing web services/RESTful APIs using ASP.NET, WinForms desirable, Source Control (Git) Miscellaneous Experience with RabbitMQ (or More ❯

Job Description: Employer: DWS Group Title: Senior C# Developer (Full Stack) Location: London About DWS: Today, markets face a whole new set of pressures – but also a whole lot of opportunity too. Opportunity to innovate differently. Opportunity to invest responsibly. And opportunity to make change. Join us at DWS, and you can be part of … full spectrum of passive investment capabilities, Passive Asset Management has over Euro 200bnof assets under management for our clients in passive portfolios. Role Details: As a Senior C# Developer you will (be): Supporting the development of the .NET based technology platform, serving the investment function. Designing and developing software solutions aligning with architecture, risk and … stacks is key over a specialism in a particular ecosystem who can work in the dynamic environment that comes with a front office role. Strong programming skills in .NET (C#) is essential, VBA/Python knowledge is valuable, additional languages such as Java would be beneficial. Strong understanding of relational databases (MS Sql/Oracle). Experience in frontend More ❯

you want to advance the world of fintech, we’d like to ask you: Are you FIS? About the role: We are looking for an experienced Senior C# .NET Developer to help grow and enhance our PTP software platform. The candidate will work on strategic enhancements to the platform as well as on client implementation … a leading-edge, cloud-based Securities Processing solution that provides trade lifecycle processing for a wide range of global financial institutions. About the team: As a Senior C# .NET Developer, you’ll be part of our PTP Platform development group. The group is broken into smaller scrum teams that each hold responsibility for a key … functionality. You’ll become involved with all phases of the development lifecycle and take ownership of key functional areas. What you will be doing: As a Senior C# .NET Developer, you will be involved in: Analysis of user requirements and translation into solution design using the most appropriate technique for the job (including mockups and More ❯

you want to advance the world of fintech, we'd like to ask you: Are you FIS? About the role: We are looking for an experienced Senior C# .NET Developer to help grow and enhance our PTP software platform. The candidate will work on strategic enhancements to the platform as well as on client implementation … a leading-edge, cloud-based Securities Processing solution that provides trade lifecycle processing for a wide range of global financial institutions. About the team: As a Senior C# .NET Developer, you'll be part of our PTP Platform development group. The group is broken into smaller scrum teams that each hold responsibility for a key … functionality. You'll become involved with all phases of the development lifecycle and take ownership of key functional areas. What you will be doing: As a Senior C# .NET Developer, you will be involved in: Analysis of user requirements and translation into solution design using the most appropriate technique for the job (including mockups and More ❯

Senior C# Developer/Engineer (C# .Net Core React) London/WFH to £80k Are you a skilled C# Developer looking to work on complex and interesting systems with continual learning and self development opportunities You could be progressing your career at in a senior, hands-on role at … a successful and scaling Retail FX Brokerage working on Greenfield systems. As a Senior C# Developer you'll be designing and developing high quality, maintainable, and reliable code for a real-time, low latency trading systems built mostly in C# and React deployed to Azure. You'll focus on C# .Net backend development … scratch. Location/WFH: You'll join colleagues in the London office Monday to Wednesday with flexibility to work from home Thursday and Friday. About you: You have strong C# .Net Core backend development experience You have a good knowledge of microservices and Cloud (AWS or Azure) experience, ideally you'll have some experience with Docker/Kubernetes, EKS More ❯

Senior C# Developer/Software Engineer (C# .Net AWS Python) London/WFH to £100k Would you like to join a growing and profitable start-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression? As a Senior C# Developer you will architect and build highly performant and scalable solutions using the Microsoft tech stack and SOLID design principles, collaborating with cross functional Agile project teams in 2 week Sprints, you'll be an advocate of best practice and ensure software is delivered to schedule. There's a host of new features and … from home three days a week. About you: You are an experienced Software Developer/Engineer with a strong knowledge of modern best practice You have strong C# backend development skills, ideally also Python coding skills You have a good knowledge of AWS You have experience of working on highly scalable systems You have a strong knowledge More ❯

Social network you want to login/join with: col-narrow-left Client: S.i. Systems Location: London, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: 949f7fad5f6f Job Views: 4 Posted: 29.06.2025 Expiry Date More ❯

Senior C#.NET Developer - Front Office The Front Office (Fixed Income) software development team requires an agile and versatile specialist who is a team player with extensive expertise in .NET/C# software development. The role demands an experienced individual comfortable working closely with a variety of front office stakeholders globally. Role Details Title: Senior Developer (Software More ❯

Summary: A boutique prop trading firm with a strong focus on high quality technology and systematic and quant trading models are looking for a Senior C# Developer to join their small, agile, London-based team. With zero red tape or bureaucracy often associated with bigger buy-side firms and investment banks, this London-based team … of engineers, researchers, modellers and traders know how to get things done in a cutting-edge market. Working next to the business, the successful C# Developer will be working with vast, complex data sets, and will be building algorithmic trading models and infrastructure in C#/.NET Core and SQL, directly with London-based quants and … traders. Requirement s: Degree-level education in STEM subject, preference for Computer Science Strong programming experience in C# and SQL Experience with vast data sets with SQL (or equivalent) Experience in multi-threaded environments and networking (TCP/UDP) desired but not essential Benefits: Market-leading compensation including competitive annual bonus in London Greenfield projects available with opportunities to More ❯

Senior C# Developer/Software Engineer (C# .Net AWS Python) London/WFH to £100k Would you like to join a growing and profitable start-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression? As a Senior C# Developer you will architect and build highly performant and scalable solutions using the Microsoft tech stack and SOLID design principles, collaborating with cross functional Agile project teams in 2 week Sprints, you'll be an advocate of best practice and ensure software is delivered to schedule. There's a host of new features and … from home three days a week. About you: You are an experienced Software Developer/Engineer with a strong knowledge of modern best practice You have strong C# backend development skills, ideally also Python coding skills You have a good knowledge of AWS You have experience of working on highly scalable systems You have a strong knowledge More ❯

the first 25 applicants A London-based Hedge Fund is on the lookout for a Senior Full Stack Developer with strong React (Front End) and C# (Back End) skills to join their high-performing team. Working directly with the Front Office trading desk , you'll help build a Greenfield trading platform , contributing to everything from … trading Be part of a team building software used both internally by traders and externally as a SaaS product Leverage the latest tech in a modern, agile environment: React.JS , C# , TypeScript , CI/CD , DevOps Impact : Direct exposure to trading strategies , real-time systems , and mission-critical apps. 6+ years of hands-on coding in C# and React … a high-performance team at the crossroads of technology and trading ? Email your CV directly to joe@virtuetech.io or reply to this post. Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Finance Referrals increase your chances of interviewing at VirtueTech Recruitment Group by 2x Get notified about new Technical More ❯

s or Master's degree in Computer Science, Engineering, Mathematics, or a related field Experience Extensive Programming Experience: Minimum of 6 years of professional experience, with the majority in C# or Java, particularly in high-performance and real-time environments. FIX Protocol & OMS Expertise: Proven background in implementing and supporting FIX-based connectivity and OMS integrations, including message routing … insurance Life assurance Corporate gym membership (and a complimentary wellness space in our London office) Employee restaurant with free breakfast, lunch and dinner Seniority level Seniority level Mid-Senior level Employment type Employment type Full-time Job function Job function Engineering and Information Technology Industries Non-profit Organizations and Primary and Secondary Education Referrals increase your chances of … interviewing at Capula Investment Management LLP by 2x Sign in to set job alerts for “Senior Software Engineer” roles. Senior Java Engineer - Take Ownership of Flagship Trading Product - Up to £120k London, England, United Kingdom 1 month ago London, England, United Kingdom 2 weeks ago London, England, United Kingdom 1 week ago Lead Software Engineer - Transfer More ❯

Senior Backend Software Engineer (C# .NET Core) - Revolutionise Healthcare with REST API Design! Are you ready to make a monumental impact in the healthcare industry? We're looking for a Senior/Lead Backend Software Engineer with a strong focus on REST API design to join our forward-thinking team. Reporting directly to the Vice … President of Software Development, this is a hands-on leadership position. Role: Senior Backend Software Engineer (C# .NET Core) Location: Fully Remote (UK) Salary: Up to £90,000 + Excellent Benefits + Share Options Reporting To: Vice President of Software Development Your Mission: Collaborate with a cross-functional team of Frontend Developers, QA Engineers, and DevOps Engineers … REST API design. You will also develop relational database schemas and work within a containerized microservice platform. Key Responsibilities: REST API Design & Implementation: Develop and maintain REST APIs using C# and .NET Core SDK. Database Mastery: Design relational database schemas, utilize Entity Framework (ORM), manage database migrations, and work with PostgreSQL. Microservices: Containerize microservices using Docker. Collaboration: Partner with More ❯

people who want to shape the future of work with us. Join us in unlocking global potential, one human and agent team at a time. Mission As a Senior Fullstack Engineer at Smartcat, you'll be at the forefront of shaping our platform's future. You'll lead the development of cutting-edge features, optimize our application's … Actively participate in code reviews, knowledge sharing, and continuous learning Requirements 7+ years of proven professional experience as a Software Engineer, with at least 3 years in .NET and C# 2+ years of experience in product companies (SaaS) 2 years of commercial experience with modern web frameworks like React/Angular/Vue Passion and strong skill for writing … clean, maintainable, and testable code and well-documented C# code Experience with writing and maintaining Unit tests and E2E tests Advanced experience with MongoDB Upper-intermediate or higher English proficiency Experience with usage of the LLM-based solutions in daily workflow (ChatGPT, CoPilot, JetBrains AI Assistant, etc). Understanding of vector databases, embeddings, and RAG implementations Strong problem-solving More ❯

Social network you want to login/join with: Senior C# Developer.Net AWS - FinTech, London col-narrow-left Client: Client Server Location: London, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Reference: Job Views: 5 Posted: 27.06.2025 Expiry Date: 11.08.2025 col-wide Job Description: Senior C# Developer/Software Engineer (C# .Net AWS Python) London/WFH to £100k Would you like to join a growing and profitable start-up that is viewed as a leading FinTech disruptor in a senior role that will allow you a great deal of influence and progression? As a Senior C# Developer … from home three days a week. About you: You are an experienced Software Developer/Engineer with a strong knowledge of modern best practice You have strong C# backend development skills, ideally also Python coding skills You have a good knowledge of AWS You have experience of working on highly scalable systems You have a strong knowledge More ❯

hour access to global markets, allowing clients to trade seamlessly. We use cutting-edge technologies to deliver an exceptional trading experience. We are seeking a Senior C# .NET Web Developer with a strong focus on Kentico CMS to support our next stage of growth. The ideal candidate will have 6-7 years of experience and … demonstrate expertise in C# and Kentico CMS development. As a key member of the web development team, you will collaborate with the Marketing team, UI/UX experts, Product Managers, and other stakeholders, contributing to the development and maintenance of our complex and business-critical CMS platform. Responsibilities: Write and maintain high-quality code in C# with a … a broad modern technology stack. Actively participate in planning and strategy discussions with stakeholders. Requirements: Minimum 6-7 years of experience in web development with a strong focus on C# and Kentico CMS. Expertise in Kentico CMS, including portal engine, ASPX templates, workflows, macros (k#), BizForms, document types, and search configurations. Proven expertise in writing C# code specifically More ❯

Social network you want to login/join with: Senior C# Developer/Engineer (C# .Net Core React) London/WFH to £80k Are you a skilled C# Developer looking to work on complex and interesting systems with continual learning and self development opportunities? You could be progressing your career at … in a senior, hands-on role at a successful and scaling Retail FX Brokerage working on Greenfield systems. As a Senior C# Developer you'll be designing and developing high quality, maintainable, and reliable code for a real-time, low latency trading systems built mostly in C# and React deployed to Azure. … You'll focus on C# .Net backend development within an AWS environment, but also with exposure across the full technology stack in a modern development environment with microservices. There are many technical challenges to explore, the initial project will be to build a KYC system from scratch. Location/WFH: You'll join colleagues in the London office Monday More ❯

Social network you want to login/join with: Senior C# Developer - up to £750 per day, London Client: Hunter Bond Location: London, United Kingdom Job Category: Other EU work permit required: Yes Job Views: 2 Posted: 26.06.2025 Expiry Date: 10.08.2025 Job Description: Role Type: Contract Rate: Up to £750 P/D Location: London …/Hybrid Duration: 6 month rolling My client is a well-established and successful tech house working in the finance sector looking for a talented senior C# Developer with excellent technical and communication skills to join their existing team of software engineers on an exciting new project. You will have the opportunity to work with … industry on a greenfield project. This is a 6-month rolling contract with a high possibility of extension, offering up to £700 P/D. Requirements: Strong experience with C#/.Net Strong experience with SQL, preferably with SQL reporting tools (SSIS/SSRS) Experience with Cloud Technologies, preferably Azure Excellent communication skills and a drive to work with More ❯

Senior C# Developer/Software Engineer (Windows Desktop Trading Systems) London to £140k Are you a Senior C# Developer with strong Windows desktop development skills combined with banking/financial services experience? You could be progressing your career at a Hedge Fund with over $10 billion under management. As a … Senior C# Developer you will work on critical systems across front, middle and back office systems to support trading, operations, finance, compliance and investor relations, optimising system performance to ensure efficient real-time data processing, reporting and automation of operational workflows. You'll focus on building C#, WinForms, WPF desktop applications and design and … flexibility to work from home once a week; there's a friendly and collaborative environment with casual dress code and a range of facilities. About you: You have strong C# desktop development experience on Windows within a banking or financial services environment You have a strong knowledge of SQL databases You have a good understanding of asset classes e.g. More ❯

Senior C# Developer - up to £750 per day Role Type : Contract Rate - Up to £750 P/D! Location – London/Hybrid Duration : 6 month rolling My client is a well-established and successful tech house working in the finance sector who are looking a talented senior C# Developer, with … a greenfields project! This is a 6 month rolling Contract, with high possibility of extension, and can pay up to £750 P/D Requirements: Strong experience working with C#/.Net Strong experience with SQL - Ideally with SQL reporting tool (SSIS/SSRS etc) Experience working with Cloud Technologies (Azure preferred) Strong Communication skills with a drive to More ❯

Senior C# Developer/Software Engineer (Windows Desktop Trading Systems) London to £140k Are you a Senior C# Developer with strong Windows desktop development skills combined with banking/financial services experience? You could be progressing your career at a Hedge Fund with over $10 billion under management. As a … Senior C# Developer you will work on critical systems across front, middle and back office systems to support trading, operations, finance, compliance and investor relations, optimising system performance to ensure efficient real-time data processing, reporting and automation of operational workflows. You'll focus on building C#, WinForms, WPF desktop applications and design and … flexibility to work from home once a week; there's a friendly and collaborative environment with casual dress code and a range of facilities. About you: You have strong C# desktop development experience on Windows within a banking or financial services environment You have a strong knowledge of SQL databases You have a good understanding of asset classes e.g. More ❯

Senior/Lead Developer (C#/Python) - TOP Hedge Fund! Are you looking for a real and meaningful challenge? Do you enjoy solving problems? Are you ambitious and looking for autonomy and influence Central London - Hybrid working (3 days in the office and 2 days in the office) You will be joining a small but … growing hedge fund which is stable. A high-performing hedge fund is hiring a Senior/Lead Developer t o help design, build, and scale cutting-edge trading and operational systems. You'll work closely with traders, researchers, and stakeholders to deliver systems that are reliable, high-performing, and secure. Key Responsibilities Depending on your experience … and technical professionals Oversee cloud adoption and security architecture Present complex tech solutions to senior management Skills & Experience Required 5-7+ years in hands-on development (C# and/or Python) Strong background in hedge fund, asset management , or financial markets Solid DevOps skills: CI/CD, containerisation, source control (e.g. Git) ETL experience with financial More ❯

actively keep this knowledge current. Adhere to Policies & Standards outlined in the Code of Conduct and mandatory training. Investigate and resolve production issues. Required Skills: Experience developing applications in C#, .NET, and .NET Core for server-side development. Experience building microservices and REST APIs. Proven experience with Agile methodologies (preferably Scrum/Kanban). Experience writing MSSQL/TSQL More ❯