1 to 25 of 37 Permanent C# Software Engineer Jobs in the UK

C# Software Engineer We’re working with a leading UK defence technology organisation offering an exciting opportunity for a C# Software Developer to join a highly regarded Systems Simulation and Experimentation team. This role is ideal for someone passionate about real-time software, system modelling, and creating innovative, high-impact … experimentation platforms across the full product lifecycle—from visualisation and experimentation to verification, validation, and training systems. Key Responsibilities In this role, you’ll design and develop real-time C# software components to support advanced simulation and system integration activities, contributing directly to the delivery of reliable, high-performance solutions. You’ll work within agile development teams …/CD processes, and test-driven development, while collaborating closely with engineers to support research, experimentation, and verification across both synthetic and physical environments. What's required for this C# Software Engineer Position? Solid experience developing in C# (C++ experience also valued). Background or interest in simulation, real-time software, or More ❯

C# Software Engineer We’re working with a leading UK defence technology organisation offering an exciting opportunity for a C# Software Developer to join a highly regarded Systems Simulation and Experimentation team. This role is ideal for someone passionate about real-time software, system modelling, and creating innovative, high-impact … experimentation platforms across the full product lifecycle—from visualisation and experimentation to verification, validation, and training systems. Key Responsibilities In this role, you’ll design and develop real-time C# software components to support advanced simulation and system integration activities, contributing directly to the delivery of reliable, high-performance solutions. You’ll work within agile development teams …/CD processes, and test-driven development, while collaborating closely with engineers to support research, experimentation, and verification across both synthetic and physical environments. What's required for this C# Software Engineer Position? Solid experience developing in C# (C++ experience also valued). Background or interest in simulation, real-time software, or More ❯

C# Software Engineer We’re working with a leading UK defence technology organisation offering an exciting opportunity for a C# Software Developer to join a highly regarded Systems Simulation and Experimentation team. This role is ideal for someone passionate about real-time software, system modelling, and creating innovative, high-impact … experimentation platforms across the full product lifecycle—from visualisation and experimentation to verification, validation, and training systems. Key Responsibilities In this role, you’ll design and develop real-time C# software components to support advanced simulation and system integration activities, contributing directly to the delivery of reliable, high-performance solutions. You’ll work within agile development teams …/CD processes, and test-driven development, while collaborating closely with engineers to support research, experimentation, and verification across both synthetic and physical environments. What's required for this C# Software Engineer Position? Solid experience developing in C# (C++ experience also valued). Background or interest in simulation, real-time software, or More ❯

C# Software Engineer We’re working with a leading UK defence technology organisation offering an exciting opportunity for a C# Software Developer to join a highly regarded Systems Simulation and Experimentation team. This role is ideal for someone passionate about real-time software, system modelling, and creating innovative, high-impact … experimentation platforms across the full product lifecycle—from visualisation and experimentation to verification, validation, and training systems. Key Responsibilities In this role, you’ll design and develop real-time C# software components to support advanced simulation and system integration activities, contributing directly to the delivery of reliable, high-performance solutions. You’ll work within agile development teams …/CD processes, and test-driven development, while collaborating closely with engineers to support research, experimentation, and verification across both synthetic and physical environments. What's required for this C# Software Engineer Position? Solid experience developing in C# (C++ experience also valued). Background or interest in simulation, real-time software, or More ❯

Senior C# Software Engineer Are you a talented C# and Azure developer ready to take ownership of innovative projects across Web, Desktop, and Cloud environments Our client, a well-established and forward-thinking software development company, is expanding its team and seeking an exceptional Senior C# Software Engineer … another coding role - it’s a chance to lead projects, influence architecture, and make a measurable impact on the products you help deliver. About the Role As a Senior C# Software Engineer, you’ll play a key role in delivering high-quality, scalable, and performant software across a range of cutting-edge systems … a team of talented developers and stakeholders, contributing to technical decisions and ensuring best practices are followed throughout the development lifecycle. Tech Stack You’ll Work With Languages & Frameworks: C#, .NET Core, ASP.NET Core MVC, Web API Cloud & Data: Azure Functions, Azure Storage, Cosmos DB, Azure SQL UI & Front-End: WPF, Blazor, SignalR, Skia DevOps & Integration: Azure DevOps, CI More ❯

C# Software Engineer X 4 - All Levels My Client is a rapidly scaling finance company focused on powering recurring commerce. Their advanced technology infrastructure helps businesses optimise and unify their financial operations, providing a competitive edge in the digital economy. With strong sector expertise and a partnership-led approach, they are now seeking a number … of C# Software Engineer to help deliver high-quality, scalable software solutions. Your role as a C# Software Engineer You will work with engineers, product managers, and designers to develop features, solve complex challenges, and enhance system performance. Your focus will be on writing clean, maintainable code and … solutions Improve performance, uptime, and code quality Collaborate in cross-functional teams and contribute to design decisions Mentor junior engineers and promote team growth What youll bring Proficiency in C#, .NET, JavaScript, and TypeScript Experience with React, Vue.js, or Angular (preferred) PHP knowledge (desirable) Familiarity with cloud services (AWS, GCP, or Azure), Docker, Kubernetes Understanding of CI/CD More ❯

Are you an experienced Senior Software Engineer - C# actively looking for a new role? Do you live in the Hertfordshire area or would love the opportunity to relocate and work in one of the UK's most exciting tech hubs? If so, my client has a superb role available to strengthen their R&D team. … key role in in all aspects of design, implementation and debugging of software to bespoke robotic applications. In this experienced Senior Software Engineer - C# job based in Royston you will be responsible for the following: Design user interfaces that are both intuitive and easy to navigate. Oversee the complete software development … lifecycle for new projects, taking accountability for the software aspects of assigned responsibilities. The successful applicant for this Senior Software Engineer - C# job based in Royston you must be: Proficient in C# and .NET. Have a 2:1 or above degree in electronic engineering, software engineering, or a comparable technical More ❯

C# Software Engineer/Developer (.Net Core React AWS) Sunderland/WFH to £70k Opportunity to progress your career in a senior, hands-on role at a at a growing games/gambling site, whilst enjoying a range of benefits and perks. As a C# Software Engineer within the Platform … team you'll build real-time payment systems and integrations that handle large volumes of transactions. You'll have a focus on backend C# .Net core but will have exposure across the full tech stack through to JavaScript/React within an AWS cloud based environment with Docker, Terraform (IaC), TeamCity, SQL and Redis; you'll gain exposure to … offices in Sunderland with a range of facilities and perks including free meals at the onsite restaurant as well as membership at onsite gym. About you: You have strong C# .Net Core backend development experience You have experience of building scalable, reliable and secure web applications using modern techniques You have experience of implementing frontend applications and have some More ❯

Lead C C# Software Engineer Stevenage Up to £65,000 + Bonus + Benefits! We’re working with a defence technology partner seeking a proactive and passionate Lead Software Developer to join their expanding Simulation and Experimentation division. This is a hands-on technical leadership role, driving innovation in synthetic environments and weapon … blend of technical leadership, hands-on coding, and project oversight , working closely with simulation architects and project leads. You’ll design, build, and enhance simulation environments using C++ and C# , contributing to the full development lifecycle — from concept creation, modelling and visualisation, to in-service support and training applications. The team plays a critical role in developing system architectures … teams to integrate models, real products and visualisation tools (including AR/VR). Supporting innovation initiatives across the complete product lifecycle. What's required for this Lead C C# Software Engineer position? Proven experience as a Lead or Senior Software Engineer with strong knowledge of C++ and C# . More ❯

Lead C C# Software Engineer Stevenage Up to £65,000 + Bonus + Benefits! We’re working with a defence technology partner seeking a proactive and passionate Lead Software Developer to join their expanding Simulation and Experimentation division. This is a hands-on technical leadership role, driving innovation in synthetic environments and weapon … blend of technical leadership, hands-on coding, and project oversight , working closely with simulation architects and project leads. You’ll design, build, and enhance simulation environments using C++ and C# , contributing to the full development lifecycle — from concept creation, modelling and visualisation, to in-service support and training applications. The team plays a critical role in developing system architectures … teams to integrate models, real products and visualisation tools (including AR/VR). Supporting innovation initiatives across the complete product lifecycle. What's required for this Lead C C# Software Engineer position? Proven experience as a Lead or Senior Software Engineer with strong knowledge of C++ and C# . More ❯

Lead C C# Software Engineer Stevenage Up to £65,000 + Bonus + Benefits! We’re working with a defence technology partner seeking a proactive and passionate Lead Software Developer to join their expanding Simulation and Experimentation division. This is a hands-on technical leadership role, driving innovation in synthetic environments and weapon … blend of technical leadership, hands-on coding, and project oversight , working closely with simulation architects and project leads. You’ll design, build, and enhance simulation environments using C++ and C# , contributing to the full development lifecycle — from concept creation, modelling and visualisation, to in-service support and training applications. The team plays a critical role in developing system architectures … teams to integrate models, real products and visualisation tools (including AR/VR). Supporting innovation initiatives across the complete product lifecycle. What's required for this Lead C C# Software Engineer position? Proven experience as a Lead or Senior Software Engineer with strong knowledge of C++ and C# . More ❯

Senior Software Engineer/Developer (C# .Net) London onsite to £150k Are you an experienced C#, backend focussed Software Engineer? You could be progressing your career in a senior, hands-on role at a global Asset Manager with c$3 million under management. As a Senior Software Engineer … front end work with JavaScript and React.js. Location: You'll be based in plush City office on a fulltime basis, Monday to Friday. About you: You have expertise with C# .Net, ASP.Net development You have a strong knowledge of databases (SQL or Oracle) You're comfortable with JavaScript/React You have a thorough knowledge of Computer Science fundamentals … Pension Health Insurance Gym membership Social events, free fruit, snacks, coffee etc. Apply now to find out more about this Senior Software Engineer/Developer (C# .Net) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose More ❯

Software Engineer – C#/.NET/WPF – Halifax – £40,000 to £55,000 KO2’s client, a leading manufacturer of cutting-edge electronic instrumentation for water and soil monitoring, is seeking a C# Software Engineer to join their on-site team in Halifax. This role will focus on designing and … developing graphical user interfaces (GUIs) using C#, .NET, and WPF for touchscreen-based electronic systems. You’ll work on real-world products that have a tangible environmental impact, used globally for monitoring and analysis. Role Overview As a C#/.NET Software Engineer, you’ll join a small, close-knit development team working on … the company’s next generation of touchscreen instrumentation. You’ll take ownership of GUI development using C#, contribute to software architecture decisions within the .NET framework, and collaborate closely with hardware and electronics engineers. Key Skills & Experience Strong experience developing applications in C# Proficiency with .NET (Core or Framework) Experience creating GUIs with WPF for touchscreen More ❯

Software Engineer/Developer (C# TypeScript AWS) Sunderland/WFH to £55k Opportunity to progress your career in a hands-on Software Engineer role at a at a growing games/gambling site, whilst enjoying a range of benefits and perks. As a Software Engineer you'll … build captivating full stack web applications across all backend services and REST APIs that form the core platform e.g. payments. You'll be using C# .Net core through to TypeScript and Vue.js within an AWS cloud based environment with Docker, Terraform (IaC), TeamCity, SQL and Redis; you'll gain exposure to a wide range of technology and will be … a range of facilities and perks including free meals at the onsite restaurant as well as membership at onsite gym. About you: You have full stack development experience including C# and TypeScript, ideally also Vue.js You have a good knowledge of AWS You have experience of building scalable, reliable and secure web applications using modern techniques You have experience More ❯

Lead Software Engineer/Developer (C# .Net Azure SaaS) Reigate/WFH to £100k Do you have expertise with C# cloud based development combined with technical/team leadership skills? You could be progressing your career, in a senior, hands-on leadership role working on complex and technically challenging systems with continual learning opportunities … colleagues in the Reigate office twice a week for team meet-ups and stakeholder meetings with the other three days work from home. About you: You have expertise with C# .Net Core backend software development, having worked on large, scalable systems with complexity You have a strong knowledge of Azure, SaaS, PaaS, microservices You have strong technical … Training and career development Social events and a range of other perks Apply now to find out more about this Lead Software Engineer/Developer (C# .Net Azure SaaS) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities More ❯

Backend Software Engineer/Developer (C# .Net Core) *Newcastle onsite* to £130k+ Are you a backend focussed Software Engineer with a first class education looking for an opportunity to progress your career, working on complex and interesting systems in an impactful role? You could be joining a FinTech scale-up that … Backend Software Engineer you will collaborate with a small, talented team to deliver the core platform within a Microsoft environment using the latest versions of C# .Net to produce high quality code. You'll take ownership of technical projects, working across the full development lifecycle to understand business needs. The company has ambitious growth plans … Group university, backed by A's at A-level You're a technologist who enjoys collaborating and problem solving, working on complex, distributed systems You have expertise with modern C# .Net Core, Python skills would also be of benefit You have a strong knowledge of modern software engineering best practices and have experience across the full software More ❯

Senior Software Engineer – C# Salary: Up to £100,000 + Benefits Location: Royston (Hybrid) Employment Type: Permanent Are you a seasoned software engineer who thrives on solving complex problems, setting technical direction, and mentoring others? Our client, an innovative and forward-thinking technology business based in Royston, is looking for a … Senior Software Engineer to play a pivotal role in scaling their cutting-edge products to the next level. This is a hybrid position with the opportunity to work part-remote while being part of a highly collaborative and ambitious team. Key Responsibilities Lead by example in implementing best practice software design patterns, architecture, and … and maintainability standards. Desirable Experience & Skills Strong candidates are likely to bring most (but not all) of the following: Experience in software engineering, with deep expertise in C# and .NET. Experience with Linux, Python, and Azure DevOps. A proven track record in start-ups/scale-ups would be advantageous Excellent communication skills and the ability to More ❯

Software Engineer Join our UK Team who are committed to a Mission! At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers success. We empower our teams in the UK to address some of the most complex problems in defence, government, safety and security, and … innovative development work to modernise of ATM solutions. If this sounds like the kind of environment you can thrive, keep reading! We currently have a vacancy for a Software Engineer in our Air Traffic Management portfolio of programmes. The Software Engineer, will be based in Whiteley but working remotely from home can … will contribute to the engineering activities throughout the release life cycle, from kick off through to operational deployment as required. Required Skills: Strong development experience with .NET framework using C# and related technologies ( LINQ, async/await, Generics etc) in Microsoft Visual Studio (e.g., .NET Framework 4.x or .NET Core/.NET 6+); Experience of Object-Relational Mapping (ORM More ❯

C#/.NET/WPF Software Engineer. Halifax. £40,000 to £55,000 KO2's client, a leading manufacturer of cutting-edge electronic instrumentation for water and soil monitoring, is seeking a C# Software Engineer to join their on-site team in Halifax. This role will focus on designing and developing graphical … user interfaces (GUIs) using C#, .NET, and WPF for touchscreen-based electronic systems. You'll work on real-world products that have a tangible environmental impact, used globally for monitoring and analysis. Role Overview As a C#/.NET Software Engineer, you'll join a small, close-knit development team working on the company … s next generation of touchscreen instrumentation. You'll take ownership of GUI development using C#, contribute to software architecture decisions within the .NET framework, and collaborate closely with hardware and electronics engineers. Key Skills & Experience Strong experience developing applications in C# Proficiency with .NET (Core or Framework) Experience creating GUIs with WPF for touchscreen or embedded More ❯

C# - Software Engineer - React or Redux - Hybrid - £45,000 + Bens - Hybrid:- This is an excellent opportunity for a Web Software engineer who has experience of developing browser-based solutions and is looking for a new challenge. Opportunities like this do not come up very often and this could really be … learn new skills. Salary - £45,000 + Pension + Health + stock options + hybrid working - 2 days in the office per week. Do you have experience of developing C# solutions in React or Redux and are looking for a new challenge? You will be working with some of the most innovative software solutions within cyber security … frameworks, such as React, Redux Automated testing tools e.g. QUnit for JavaScript, or similar. JavaScript both client-side script and server ASP Multi-tier web application development experience including C# Experience designing for accessibility Experience of SQL Server usage Developing, deploying and supporting web clients using Classic ASP and JavaScript This is just a short over-view of what More ❯

C# Software Engineer X 4 - All Levels My Client is a rapidly scaling finance company focused on powering recurring commerce. Their advanced technology infrastructure helps businesses optimise and unify their financial operations, providing a competitive edge in the digital economy. With strong sector expertise and a partnership-led approach, they are now seeking a number … of C# Software Engineer to h click apply for full job details More ❯

We have an exciting opportunity for a Senior Software Engineer (C#) to join our Product & Tech team on a full-time, permanent basis. If you're a self-starter with a keen interest in software development and enjoy collaborating in a team setting, we want to hear from you. About the role This … efficient, stable and scalable software systems Work closely with Technical Leads and Product Owners to deliver business value Design, develop and maintain complex applications and services using C# and the .NET ecosystem Participate in and lead code reviews to ensure high code quality Champion HealthHero values and contribute to the continued success of the organisation What you … will bring: Solid understanding of core C# language features, including OOP, collections, exception handling, and asynchronous programming - we are using .NET 8 & 9 Cloud – We use Azure, but if you have experience in another major cloud we are happy to help you transfer your knowledge Experience designing REST APIs and event-driven applications Experience in developing front end applications More ❯

Role: Full Stack C# Software Engineer (Angular, Azure) Location: Nottingham City Working Arrangement: Hybrid working with twice per week in the office (flexible, not rigid) Salary: Up to £60k plus benefits Fed up with being just a number in a massive company? Only ever get to see a very narrow view of the product youre … for Youll be working in a small tech team in a law firm, full of lovely people, with full scope over many different projects that span the company. Using C#, .Net core 8+, TypeScript, Angular, Azure, Elastic Search, CosmosDB, etc. youll work across the full stack (its important that youve got a good amount of experience and proficiency with More ❯

We have an exciting opportunity for a proactive and passionate C# software developer to join our Weapons System Simulation and Experimentation (WSSE) team! Salary : Up to £57,000, depending on experience & grade Dynamic (hybrid) working : 2- 3 days per week on-site due to workload classification Security Clearance : British Citizen Restrictions and/or limitations relating to … to end representation of the weapon system through: Visualisation and demonstrations Experimentation Design and development Verification and Validation Training Systems Development (using agile scrum methodologies) of real-time software components to simulate weapon systems, including the Integration of hardware to provide true representations of our systems. What we're looking for from you: We are looking for passionate … with experience in using software to build hardware solutions or synthetic environments. The successful candidates will be able to demonstrate exposure to practical software engineering, C#/C++ software development. You will be able to demonstrate your experience/knowledge in some of the following areas: Real-Time Software Configuration control More ❯

Stevenage We have an exciting opportunity for a proactive and passionate C# software developer to join our Weapons System Simulation and Experimentation (WSSE) team! Salary : Up to £57,000, depending on experience & grade Dynamic (hybrid) working : 2- 3 days per week on-site due to workload classification Security Clearance : British Citizen Restrictions and/or limitations relating … to end representation of the weapon system through: Visualisation and demonstrations Experimentation Design and development Verification and Validation Training Systems Development (using agile scrum methodologies) of real-time software components to simulate weapon systems, including the Integration of hardware to provide true representations of our systems. What we're looking for from you: We are looking for passionate … with experience in using software to build hardware solutions or synthetic environments. The successful candidates will be able to demonstrate exposure to practical software engineering, C#/C++ software development. You will be able to demonstrate your experience/knowledge in some of the following areas: Real-Time Software Configuration control More ❯