1 to 25 of 54 Senior C# Developer Jobs in London

Social network you want to login/join with: Senior Full Stack C# .NET Developer, west london col-narrow-left Client: WebX Systems Ltd. Location: west london, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 4 Posted: 31.05.2025 Expiry Date: 15.07.2025 col-wide Job Description: Senior Full Stack C# .NET DeveloperFully Remote (UK Residents Only) About WebX Systems At WebX, we specialise in technical publishing and content management solutions for the aerospace and defence sectors worldwide. Our flagship products— UltraCSDB, UltraAuthor, UltraXML , and UltraPortal —are used globally and combine proven legacy systems with cutting-edge, cloud-native innovations. As a privately owned UK … help lead the transition toward cloud-native architecture. This role is perfect for someone who enjoys innovating within established environments while also driving forward new development. Technology Stack Legacy C#, .NET Framework, WinForms, WCF Client-Server Architecture, MS SQL Server Modern .NET 9, Blazor, Minimal APIs Entity Framework, Redis, RabbitMQ Aspire (.NET), Cloud-Native development Key Responsibilities Project Leadership More ❯

Social network you want to login/join with: Senior Full Stack C# .NET Developer, south west london col-narrow-left Client: WebX Systems Ltd. Location: south west london, United Kingdom Job Category: Other - EU work permit required: Yes col-narrow-right Job Views: 4 Posted: 31.05.2025 Expiry Date: 15.07.2025 col-wide Job Description: Senior Full Stack C# .NET DeveloperFully Remote (UK Residents Only) About WebX Systems At WebX, we specialise in technical publishing and content management solutions for the aerospace and defence sectors worldwide. Our flagship products— UltraCSDB, UltraAuthor, UltraXML , and UltraPortal —are used globally and combine proven legacy systems with cutting-edge, cloud-native innovations. As a privately owned UK … help lead the transition toward cloud-native architecture. This role is perfect for someone who enjoys innovating within established environments while also driving forward new development. Technology Stack Legacy C#, .NET Framework, WinForms, WCF Client-Server Architecture, MS SQL Server Modern .NET 9, Blazor, Minimal APIs Entity Framework, Redis, RabbitMQ Aspire (.NET), Cloud-Native development Key Responsibilities Project Leadership More ❯

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 ❯

Job Title: Senior .NET Developer (12-Month Contract) Location: 100% Remote BRISTOL AREA We are looking for an experienced and talented Senior .NET Developer to join our dynamic development team on a 12-month contract with the potential for extension. As a Senior .NET Developer, you will play a crucial role in creating high-quality, scalable, and resilient solutions while mentoring junior team members and supporting existing initiatives. Responsibilities: Create and adapt new C#/.NET Core services to meet evolving business requirements. Mentor and coach existing team members through pair programming , peer reviews , and team talks , helping them improve their C# … and being an active member of an agile and self-improving team. Strong diagnostic skills and experience providing levels of support when issues arise. Extensive experience ( 5+ years ) with C# and .NET Core . Deep understanding of Object-Oriented (OO) concepts and SOLID design principles . Proven experience developing in Microsoft Azure and using Terraform . Strong knowledge of More ❯

Senior Developer – .NET, C#, SQL Server, API, Azure Devops, MDM/ETL Exp: 5+ yrs Work Timing: 9 AM to 5 PM EST(2 PM to 10.00 PM UK) Work Location: Remote Job Description Senior Developer – .NET, C#, SQL Server, API, Azure Devops, MDM/ETL Duties to be performed … Deep knowledge/experience in .NET back-end development with C# and SQL to design, develop and implement solutions • Experience with Entity Framework or similar object-relationship mapping frameworks • Experience building and managing RESTful APIs and SQL Server objects • Experience with Azure DevOps pipelines for build and release management is desired, but experience with similar CI/CD tools More ❯

Job Description 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# … 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 experience. 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 More ❯

C# .NET Software Developer with FX and Fixed Income Our Client is a niche boutique broker specialising in FX. They are looking to recruit a C# .NET Software Developer with at least 3 to 5 years proven track record of developing with C# .NET. The Client would like meet candidates ideally with some … external reporting/tradeflow and pricing APIs. Maintaining the company’s daily operation on the existing platforms. Essential skills :- Minimum 3 to 5 years experience of Microsoft web technologies ( C#, ASP.NET Core MVC ) Relational database experience (SQL Server) Proactively able to build relationships with stakeholders:- sales, brokers, middle office, external vendors. Ability to produce clean, well-written, fully tested 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 ❯

Job Description: 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 Market-leading compensation including competitive annual bonus in London Greenfield projects available with opportunities More ❯

Job Description Role Type: Perm Title: Senior C# Engineer Client: Established Financial Institution Salary: Up to £120,000 P/A + Bonus Location: London/Hybrid My client is a well-established and successful tech house working in the finance sector, seeking a talented senior C# Developer with outstanding technical and … project! You will have the opportunity to work with some of the best technologists and the latest technologies in the industry on a greenfield project! Requirements: Strong experience with C#/.NET Experience with Cloud Technologies, particularly Azure Experience with TypeScript and frameworks like Angular or React Strong SQL skills Finance experience is a plus Excellent communication skills and More ❯

Social network you want to login/join with: Senior C# (.NET) Developer with search ranking (Apache Solr) experience to build microservices and queries for search indexing in an AWS environment, 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 … d2bd4 Job Views: 2 Posted: 02.06.2025 Expiry Date: 17.07.2025 col-wide Job Description: Our Client is seeking a Senior C# (.NET) Developer with search ranking (Apache Solr) experience to build microservices and queries for search indexing in an AWS environment. Fully remote role that can be worked anywhere within Canada. Must Haves: 8+ years as … a Software Developer using Object-Oriented Design (OOD) Most recent 3 years primarily focused on C# (.NET) Experience with Apache Solr including changing ranking order, key areas, adding plug ins and building custom analyzers Experience working in cloud environment, AWS preferred but open to Google Cloud or Azure Nice to Haves: Experience with containers and container schedulers 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 ❯

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 ❯

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 ❯

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 Sign in to set job 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 ❯

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 ❯

Summary: Based in central London, with a hybrid work-from-home policy, the successful software engineer does not need specific financial knowledge or experience but should have a strong interest in the field. The role involves developing a quantitative research More ❯

Senior Software Developer (Python & C#) Location: Dartford with Manchester, Worksop, London (Considered) The Senior Software Developer for the Digital Design Intelligence (DDI) platform will design, implement, and maintain a scalable, Azure-based cloud platform and framework to support the business and citizen developers in creating secure, governed applications. This hands-on … to work within a secure, scalable environment that aligns with Engineering standards. Use Infrastructure as Code (IaC) tools like Terraform, or Bicep for consistent, automated resource provisioning. Automation &Developer Enablement Implement and automate pre-configured environments, supporting citizen developers with ready-to-use, compliant resources. Integrate DDI platform automation with CI/CD pipelines, using tools like GitHub … DDI tools, templates, and best practices, fostering effective knowledge transfer. Provide tutorials, workshops, and platform documentation to support citizen developers and technical teams. Skills and Qualifications: Highly proficient with C# and Python development. Minimum 10 years experience. 5+ years of experience with Azure services, including hands-on experience creating platforms or frameworks for non-expert users. (Azure certification is 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 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 ❯