26 to 44 of 44 Senior C# Software Engineer Jobs in the UK

Senior Software Engineer (Node.js/TypeScript) Theyre building a platform thats already making a huge impact and are now looking for a Senior Software Engineer to help shape the next stage of their technology. Youll work across design, product and engineering to build scalable backend systems that are More ❯

Job Title: Senior Software Engineer Location: London (Hybrid/Remote options available) We are seeking a talented and motivated Software Engineer with 5+ years of experience to join our dynamic team based in London. You will be instrumental in developing, deploying, and maintaining scalable web applications using modern technologies. Design … develop, and maintain web applications using Python and Django Build and manage cloud infrastructure on AWS Collaborate with cross-functional teams to deliver high-quality software solutions Troubleshoot and resolve software defects and performance issues 5+ years of proven experience in Python and Django development Strong knowledge of AWS services and cloud architecture Good understanding of 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 … 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 ❯

Software Engineer Python/FastAPI/React/Functional programming/Typescript Location: London, UK (Hybrid) Type: Full-time This startup is building a cutting-edge platform to transform how engineers design physical products. This company is a spin-out from one of the UK s most successful startups, built by top-tier engineers and developers … from industry leading teams. We re looking for a software engineer who enjoys writing clean, functional code and is genuinely passionate about real-world engineering not just building software, but helping change how things are designed and built. Frontend or Backend Python, FastAPI, Pydantic, PostgreSQL, Docker Frontend: React, TypeScript, Vite Functional programming, async APIs … for geometry, simulation, and data workflows Develop responsive, performant frontends using React and TypeScript Work closely with domain experts (engineers, designers) to translate complex physical problems into usable software features Follow functional programming practices to write testable, composable code Own features from idea to implementation to deployment Bachelor s degree in Computer Science, Engineering, Physics, Mathematics, or a More ❯

Senior Software Engineer (Test Software) Salary: Up to £75,000 per annum + Bonus Benefits: Job security (Big industry investment, no redundancies during Covid & kept hiring), great pension, Annual Pay Review, Enhanced Parental Leave, Training & Membership Fund, Courses & Training, Hobby Clubs and more A market leading and global company within the … aerospace defence sector are looking for passionate software engineers with experience within test software. This is a fascinating chance to be involved with developing and supporting test software solutions for use within test equipment on aerospace electronics and their control systems. You will get the opportunity to work with teams across all areas test solution design … including Real-Time, software, hardware and simulation on mission critical development. This position is subject to security clearance and so all candidates must be British Citizens and have resided in the UK for the last 5 years. Strong programming knowledge of C, C++ or ADA Previous experience within software development for hardware or safety critical testing More ❯

Senior Software Engineer Golang, Node.js, TypeScript, React & AWS Fully Remote (Southwest preferred) Salary £60-70k Would you like to join a fintech that s taking the pain away from an entire sector of the finance industry? They built the first version of their product for a handful of contacts who were crying … out for this tech - it was an instant success. You ll be an established Senior or a high-end Mid-Level Engineer who s on the verge of stepping up, and you ll be working across the full stack, ideally with a slight lean towards backend development. js, TypeScript, React and AWS so you ll need More ❯

Senior Product Engineer Remote First (Occasional travel to London) 100k + 10% Bonus Python, TypeScript, GCP/AWS Are you a software engineer with a product mindset? Do you ask questions about what youre building, challenge assumptions, and care deeply about solving real user problems? This is an opportunity for a Senior Product Engineer to join a fast-growing AI and Data scaleup thats pushing the boundaries of innovation in the UK. Collaborating with engineers and product teams to design and deliver high-quality, scalable solutions. Building and maintaining services using Python, TypeScript, and cloud platforms such as AWS or GCP. Working with serverless architectures, containerisation, and NoSQL More ❯

Senior Software Engineer Hybrid - 4 days a week in Central London £100k + Bonus + Equity We re working with a well funded, high-growth fintech start-up that s building the next generation of financial automation. They're building an Ai powered, fully automated financial operating system and payment platform. Fintech start … onboarding, helping translate needs into solutions (strong comms required) Building and scaling core features (stack is currently .NET, AWS, with React on the front end) Strong backend engineering experience - C#, .Net Core, AWS Comfort-ability contributing to the front end, ideally using React Proven experience building 3rd-party integrations (GoCardless, Stripe, or similar) Progression - career growth opportunities as the … some of the industries best engineers Ownership Work closely with leadership in a flat, agile team Competitive package £100k + equity + bonus It s for an engineer who loves solving technical challenges, enjoys working directly with customers, and wants to help build something big from the ground up. More ❯

combining data science, algorithmic precision, and intuitive design, we develop cutting-edge tools that enable users to analyze, interpret, and act on market dynamics with confidence. As a Senior Software Engineer in the Product Engineering team you will build and evolve a data and content dissemination platform (Web, App, APIs, messaging) and corresponding data … help in business requirement analysis and specification to improve not only the tools but also processes and information flow throughout the company. Design, plan and implement new efficient software solutions in Python and Go Maintain and enhance our Airflow data pipelines Build and extend knowledge of financial instruments in Computer Science or similar field involving coding (e.g. physics … or applied mathematics) Algorithms, data structures, complexity analysis and software design Hands-on senior level experience in Python programming Unix based systems, containerized environments and Kubernetes Working experience with databases: relational, NoSQL and time series Proficient written and verbal communication in English Team player, strong sense for quality, reliability and innate curiosity to learn new things More ❯

Senior Software Engineer Hybrid/Remote working flexibility. Offices based in Bournemouth, Dorset. OOP, PHP, LAMP, MVC Symfony, HTML, CSS, JavaScript/TypeScript Salary circa £60,000 - £65,000 plus benefits including remote working, pension scheme, private medical cover My client are at the forefront of delivering technology to the transport sector More ❯

Are you interested in working in Tech for Good? Have you got experience working with Kotlin, or are keen to work with Kotlin? Principal Software Engineer Clean Energy for EV Charging &##Up to £150k + bonus + benefits &##Hybrid in London 2 days per week Due to exciting projects in the pipeline, they are looking … to grow their team with Principal Software Engineers who have experience in the following: Kotlin software development (They are also open to Core Java experience, as long as you are happy to work with Kotlin) AWS or other cloud experience Have worked in modern, product-focused tech companies They are looking for engineers who are curious … week If you re interested in working with new technologies while also making a difference to the world, positively impacting through technology, apply now for this fantastic Principal Software Engineer opportunity More ❯

Senior Engineer Data/Software - London - £90,000 - £130,000 My client are expanding their Data Science & Technology, the team builds the systems and tools that enable trading teams to analyze markets, forecast price movements, and manage risk with speed and precision. If you re passionate about engineering impactful solutions in a … local charities 23 days annual leave plus bank holidays Hybrid work model 3 days per week in the London office Collaborate directly with trading and analytics teams to engineer, optimize, and automate front-office workflows and analytical models. Develop robust Python-based services and APIs using modern frameworks, microservice architectures, and best-practice design principles. Design and maintain More ❯

Software Developer (.NET/Azure) Manchester/Remote up to 80k Tired of firefighting someone elses code? Want to actually see the impact your work has on customers? This team sits right at the centre of our growth the bridge between product and client. Youll be building and integrating new components, rolling out product enhancements, and making sure … deliver seamless solutions. Championing clean, test-driven, event-driven development (TDD/SOLID). Using Azure DevOps to streamline delivery and automation. What Were Looking For: Strong experience with C# .NET Core and Azure. A developer who enjoys variety one week building new features, the next integrating with a clients system. Confident communicator with both internal teams and external More ❯

Software Developer (.NET/Azure) Manchester/Remote up to £80k Tired of firefighting someone else s code? Want to actually see the impact your work has on customers? This team sits right at the centre of our growth the bridge between product and client. You ll be building and integrating new components, rolling out product enhancements … seamless solutions. Championing clean, test-driven, event-driven development (TDD/SOLID). Using Azure DevOps to streamline delivery and automation. What We re Looking For: Strong experience with C# .NET Core and Azure. A developer who enjoys variety one week building new features, the next integrating with a client s system. Confident communicator with both internal teams and More ❯

leverage AWS for infrastructure This is a hybrid role where you'll be spending 2/3 days a week onsite in London 5+ years) in full-stack software Strong proficiency in Python for backend development. Experience with modern frontend frameworks (e.g., React, Vue, Angular). Solid understanding of database technologies (e.g., PostgreSQL, MySQL) and data Experience designing More ❯

£90,000 Leeds (hybrid) Tech-for-Good AWS Flask/FastAPI/Django Leeds - 2 days a week on-site Are you an experienced Python Engineer ready to take ownership of technical direction while staying fully hands-on? They re scaling fast and need a Technical Lead to guide the evolution of their core platform while remaining … cloud (AWS) and infrastructure as code (Terraform) Solid understanding of SQL and database design Experience with modern frontend stacks and API design Enthusiasm for mentoring, collaboration and delivering software with impact Apply now or reach out for a chat to learn more about how you could help shape something meaningful. Technical Lead (Python) £70,000 -  More ❯

is a hands-on role with real ownershipdesigning and building backend systems, collaborating with stakeholders, and shaping the technical roadmap across a suite of integrated platforms. NET Core and C# (including LINQ, JSON, IoC) Experience with Azure PaaS: Function Apps, Blob/Table Storage, Service Bus, Azure Search, API Management Comfortable working in an Agile environment using Wikis and More ❯

We are partnered with a high-growth, VC-funded Data Intelligence platform. Full Stack Environment: TypeScript, Node.js, React (Redux/Context API). A role focusing on full-stack architecture with some Data Pipelining. Paddington, 3 days a week on More ❯

all data across our estate. Enablement - Designing and building services that help power the development, deployment, and monitoring of our world-leading trading platform. You have experience in software development You are focused on quality, deployment and in-life support as well as the core engineering. More ❯