SeniorSoftwareEngineer Node.js/AWS/React London (Hybrid, 3 days onsite) Are you the kind of SeniorSoftwareEngineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust? This is a chance for a SeniorSoftwareEngineer to join a small … based in the London City Centre thats building products to make sense of massive data streams. Youll be part of a tight-knit team (around ten people total, five software engineers), working on a genuinely greenfield platform with a modern stack and zero legacy The focus now is on maturing the codebase re-architecting, refactoring, testing, and scaling. As … a SeniorSoftwareEngineer, youll play a key role in helping the team evolve from early-stage speed to long-term stability, with the freedom to influence both product direction and engineering quality What youll be doing: Building and scaling a Node.js application that sits at the core of the product Designing and implementing new features for More ❯
Working for an industry leading, high-growth SaaS business with some of the biggest brand names in the world as customers, the SeniorSoftwareEngineer will build innovative next-gen solutions that are at the forefront of the industry. In this role, the SeniorSoftwareEngineer will be given full autonomy, taking ownership from … backend systems (some frontend too, if you like). This area is the future of the company (and the industry!) and as such has strong investment and visibility. The SeniorSoftwareEngineer will be responsible for leading the design, build and deployment of industry leading software solutions. You’ll work in collaboration with product, design and … the wider engineering team to improve and scale existing features, as well as build brand new ones. The SeniorSoftwareEngineer will have: • Strong backend or full-stack software development experience • Strong coding experience in either Java, Golang (Go), Python or Scala – multiple would be even better! • Experience with cloud platforms e.g. AWS, Azure, GCP - Google More ❯
london (city of london), south east england, united kingdom
RedCat Digital
Working for an industry leading, high-growth SaaS business with some of the biggest brand names in the world as customers, the SeniorSoftwareEngineer will build innovative next-gen solutions that are at the forefront of the industry. In this role, the SeniorSoftwareEngineer will be given full autonomy, taking ownership from … backend systems (some frontend too, if you like). This area is the future of the company (and the industry!) and as such has strong investment and visibility. The SeniorSoftwareEngineer will be responsible for leading the design, build and deployment of industry leading software solutions. You’ll work in collaboration with product, design and … the wider engineering team to improve and scale existing features, as well as build brand new ones. The SeniorSoftwareEngineer will have: • Strong backend or full-stack software development experience • Strong coding experience in either Java, Golang (Go), Python or Scala – multiple would be even better! • Experience with cloud platforms e.g. AWS, Azure, GCP - Google More ❯
Contract role : SeniorSoftwareEngineer : Up to £475 per day Outside IR35 : 9 months rolling : Hybrid Monthly (London) An innovative digital consultancy is looking for experienced SeniorSoftware Engineers to design and architect scalable, high-performance systems for a cutting-edge platform being developed for a major client. In this role, you’ll tackle complex … technical challenges as part of an agile team following Scrum methodologies. As a SeniorSoftwareEngineer, you’ll set the standard for code quality and best practices, actively contributing to code reviews and collaborative programming sessions with your team. As a SeniorSoftwareEngineer, you will be experienced with: C#, .Netcore JavaScript, React.js AWS … Key information: Up to £475 per day Outside IR35 9 months rolling Hybrid Monthly (London) This is an exciting opportunity for a SeniorSoftwareEngineer to join a high-performing development team. Contract role : SeniorSoftwareEngineer: Up to £475 per day Outside IR35 : 9 months rolling : Hybrid Monthly (London) *Unfortunately, due to the More ❯
SeniorSoftwareEngineer | Blending Music, Science and Technology 💻 SeniorSoftwareEngineer 🎶 Incubated Startup - Combining Music, Science and Tech 💰 Up to £110,000 p/a + Equity ⚙️ Stack: Typescript, React, Node/Nest, AWS - FE Leaning (Rust in the stack) We're partnered with a groundbreaking company using advanced technologies and musical expertise to … largest music for media companies behind best known TV and Film soundtracks, they are looking to transform personalised musical experience for mindfulness and wellness. We are looking for a SeniorSoftwareEngineer, proficient in Typescript & React with some Node + AWS experience to join a founding team of customer-centric, cross functional engineers. If you are a … SeniorSoftwareEngineer looking to join a growing company looking to use music, science and technology to transform wellbeing, this one is for you. Interested? Apply within or reach out to James for more information. SeniorSoftwareEngineer | Blending Music, Science and Technology More ❯
SeniorSoftwareEngineer | Distributed Systems | Sustainable Cloud Native Platform 💸Up to £110,000 per annum plus bonus plus stock 🏠Central London office 🖱️Golang, Rust, C, Kubernetes, Linux, Cloud Native, Distributed systems... Are you a SeniorSoftwareEngineer with extensive knowledge of building distributed systems? Looking to join a company who are solving genuine problems … a real impact on projects? If so... I'm partnered with a very exciting Cloud scale-up who have received record Series A funding and are looking for innovative SeniorSoftware Engineers to join their ambitious team! With a new VP of Engineering who has spent much of their career building out a world leading Cloud platform, the … to build out state-of-the-art, Greenfield code which can focus on being the worlds most accountable and sustainable cloud provider🌳 What they're looking for in a SeniorSoftwareEngineer: Tech agnostic but preferable experience working with Golang, Rust, C/C++ or Java. In-depth knowledge of distributed systems, building solutions at scale where More ❯
london (city of london), south east england, united kingdom
Burns Sheehan
SeniorSoftwareEngineer | Distributed Systems | Sustainable Cloud Native Platform 💸Up to £110,000 per annum plus bonus plus stock 🏠Central London office 🖱️Golang, Rust, C, Kubernetes, Linux, Cloud Native, Distributed systems... Are you a SeniorSoftwareEngineer with extensive knowledge of building distributed systems? Looking to join a company who are solving genuine problems … a real impact on projects? If so... I'm partnered with a very exciting Cloud scale-up who have received record Series A funding and are looking for innovative SeniorSoftware Engineers to join their ambitious team! With a new VP of Engineering who has spent much of their career building out a world leading Cloud platform, the … to build out state-of-the-art, Greenfield code which can focus on being the worlds most accountable and sustainable cloud provider🌳 What they're looking for in a SeniorSoftwareEngineer: Tech agnostic but preferable experience working with Golang, Rust, C/C++ or Java. In-depth knowledge of distributed systems, building solutions at scale where More ❯
Being a SeniorSoftwareEngineer at Privalgo We are looking for a dynamic and forward-thinking SeniorSoftware Engineer. We need someone that can hit the ground running, remaining accountable as you work alongside a globally distributed team. As a SeniorSoftwareEngineer, you will work with our Architects and Product Team … to bring designs to life. More specifically, you will demonstrate high-quality software development expertise, responsible for developing a secure, high-performance code. You will be confident with the software development life cycle (SDLC) from preliminary system design through to development, onto tests and deployment. We want someone who is passionate and remains curious, always asking why, and … why not, and not afraid to have a voice. As a SeniorSoftwareEngineer, you will be a mentor to other less experienced developers, challenging the team to do better. When it comes to Technology initiatives, you’ll be proactive and contribute new ideas, keen to lead the development of new features, work on bug fixes and More ❯
london (city of london), south east england, united kingdom
Privalgo
Being a SeniorSoftwareEngineer at Privalgo We are looking for a dynamic and forward-thinking SeniorSoftware Engineer. We need someone that can hit the ground running, remaining accountable as you work alongside a globally distributed team. As a SeniorSoftwareEngineer, you will work with our Architects and Product Team … to bring designs to life. More specifically, you will demonstrate high-quality software development expertise, responsible for developing a secure, high-performance code. You will be confident with the software development life cycle (SDLC) from preliminary system design through to development, onto tests and deployment. We want someone who is passionate and remains curious, always asking why, and … why not, and not afraid to have a voice. As a SeniorSoftwareEngineer, you will be a mentor to other less experienced developers, challenging the team to do better. When it comes to Technology initiatives, you’ll be proactive and contribute new ideas, keen to lead the development of new features, work on bug fixes and More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Oliver Bernard
SeniorSoftwareEngineer (React, Node.js, AWS) Salary: £90,000 - £110,000. Location: Hybrid in London. SeniorSoftwareEngineer (React, Node.js, AWS) - would you like the opportunity to work for a market leading organisation, currently looking to revolutionise the data space? You will be joining a technology team who have a passion for innovation, collaboration … as well as embracing new ideas, technologies and approaches. As a SeniorSoftwareEngineer, you will be working closely with Product and design, taking full responsibility and ownership from conception to post-deployment. The company has grown significantly in the last few years and are looking for someone who can join in the process of growing their … building a web application from scratch. · Ideally looking for Backend focused Engineers who are comfortable across the stack so must be happy working this way. If you're a SeniorSoftwareEngineer with strong experience working in JS/TS, please apply. More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Prism Digital
SeniorSoftwareEngineer | Legacy to Modern | C#, .Net | SaaS Data A fast-growing SaaS business is investing heavily in its tech platform and building out a senior engineering hub in London. They’re on the lookout for a SeniorSoftwareEngineer to help drive modernisation, set technical direction, and mentor squads as they … scale. This is a senior, hands-on role. You’ll design and build applications, lead migrations away from legacy frameworks, and ensure the platform is stable, scalable, and fit for the future. Expect to spend plenty of time coding, alongside leading migrations and leading/mentoring 4 engineers. You will have complete autonomy for all things C# .NET in … Comfortable balancing legacy upkeep with platform modernisation Confident with IIS, AWS, TeamCity, Octopus Deploy, SQL Server Bonus points for exposure to Angular or Telerik libraries Prior experience as a seniorengineer in SaaS or product-led teams Someone who enjoys mentoring, influencing direction, and staying hands-on Location & working style: Hybrid London role, with 1–2 days a More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Prism Digital
SeniorSoftwareEngineer | Legacy to Modern | C#, .Net | SaaS Data A fast-growing SaaS business is investing heavily in its tech platform and building out a senior engineering hub in London. They’re on the lookout for a SeniorSoftwareEngineer to help drive modernisation, set technical direction, and mentor squads as they … scale. This is a senior, hands-on role. You’ll design and build applications, lead migrations away from legacy frameworks, and ensure the platform is stable, scalable, and fit for the future. Expect to spend plenty of time coding, alongside leading migrations and leading/mentoring 4 engineers. You will have complete autonomy for all things C# .NET in … Comfortable balancing legacy upkeep with platform modernisation Confident with IIS, AWS, TeamCity, Octopus Deploy, SQL Server Bonus points for exposure to Angular or Telerik libraries Prior experience as a seniorengineer in SaaS or product-led teams Someone who enjoys mentoring, influencing direction, and staying hands-on Location & working style: Hybrid London role, with 1–2 days a More ❯
Role : Java SoftwareEngineer 💰 Salary: Up to £95,000 +10% Bonus 🌍 Location: London (2 days a week) 🛠 Key Skills: Java 17+, SpringBoot, React/Typescript, AWS This is a great opportunity for a Senior Java SoftwareEngineer to a travel experiences business. You’ll lead backend services and API integrations with a huge number of … ll join a cross-functional team, being the go-to for these services and will contribute to architectural design and technology decision making across the product.. 🎯 Responsibilities as the Senior Java SoftwareEngineer: Assume technical ownership of feature development end-to-end Advocate for best coding practices within the team Lead architecture decision making and technology decision … making Design, build, review, test, and deploy services and code in live production environments Uphold development standards and prioritize best coding practices ✅ Experience needed as the Senior Java SoftwareEngineer: Backend development experience, working with production level Java based applications Strong system architecture and system design skills Familiarity with cloud services (preferably AWS) A passion for ensuring More ❯
london (city of london), south east england, united kingdom
Switch Tech Talent
Role : Java SoftwareEngineer 💰 Salary: Up to £95,000 +10% Bonus 🌍 Location: London (2 days a week) 🛠 Key Skills: Java 17+, SpringBoot, React/Typescript, AWS This is a great opportunity for a Senior Java SoftwareEngineer to a travel experiences business. You’ll lead backend services and API integrations with a huge number of … ll join a cross-functional team, being the go-to for these services and will contribute to architectural design and technology decision making across the product.. 🎯 Responsibilities as the Senior Java SoftwareEngineer: Assume technical ownership of feature development end-to-end Advocate for best coding practices within the team Lead architecture decision making and technology decision … making Design, build, review, test, and deploy services and code in live production environments Uphold development standards and prioritize best coding practices ✅ Experience needed as the Senior Java SoftwareEngineer: Backend development experience, working with production level Java based applications Strong system architecture and system design skills Familiarity with cloud services (preferably AWS) A passion for ensuring More ❯
SeniorSoftwareEngineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a SeniorSoftwareEngineer to join its high-performing engineering organisation in London. This is an opportunity to contribute to a platform designed to improve finance globally — with real impact at … mobile-first platform. Backed by leading venture capital and impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a SeniorEngineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. You'll collaborate with … product, data, and platform teams to deliver high-impact features that directly improve user financial wellbeing. This is a hands-on role for an engineer who values clean architecture, measurable outcomes, and meaningful user impact. What You’ll Do: Design and implement distributed systems that are resilient, scalable, and secure. Own technical decision-making across architecture and implementation — selecting More ❯
london (city of london), south east england, united kingdom
Austin Werner
SeniorSoftwareEngineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a SeniorSoftwareEngineer to join its high-performing engineering organisation in London. This is an opportunity to contribute to a platform designed to improve finance globally — with real impact at … mobile-first platform. Backed by leading venture capital and impact investors, the organisation is entering a new phase of growth, with engineering at the core. The Opportunity As a SeniorEngineer, you will play a key role in designing and delivering scalable, reliable systems that handle significant volumes of real-time data and transactions. You'll collaborate with … product, data, and platform teams to deliver high-impact features that directly improve user financial wellbeing. This is a hands-on role for an engineer who values clean architecture, measurable outcomes, and meaningful user impact. What You’ll Do: Design and implement distributed systems that are resilient, scalable, and secure. Own technical decision-making across architecture and implementation — selecting More ❯
City of London, London, United Kingdom Hybrid / WFH Options
La Fosse
SeniorSoftwareEngineer | Hybrid | Node | AWS | TypeScript | £100k + 10% bonus La Fosse has partnered with a global leader in customer loyalty and travel services. We're looking for a SeniorSoftwareEngineer with a strong background in full-stack JavaScript (Backend JS leaning) to join their growing team. Your mission: Build greenfield systems … industry-leading engineering practices. What They're Looking For 6+ years of technical experience with the Full Stack JavaScript ecosystem Experience leading the design, development, and operation of innovative software solutions Strong skills in modern web development (Node.js, AWS, TypeScript) and a solid understanding of web architecture Proficiency in building and managing APIs (GraphQL & RESTful) and strong database fundamentals … twice weekly) Interview Process: Streamlined two-stage virtual interview If this sounds like the next step in your engineering journey, we'd love to hear from you. Apply now! SeniorSoftwareEngineer | Hybrid | Node | AWS | TypeScript | £100k + 10% bonus More ❯
SeniorSoftwareEngineer - TS, React, Next.js, Node £70,000-85,000 3-4 days p/week in London Would you like the opportunity to work for a fast-growing start-up, currently looking for a Senior Fullstack TypeScript Engineer? You will be joining a dynamic product team, where you will be building great software … world of AI. The company is committed to providing a seamless experience for both customers and internal teams. You will work within a unified codebase that drives their B2B software and custom AI. As a SeniorSoftwareEngineer, you will be working across their stack using TypeScript, React, Next.js, Node.js, and LLMs. Core requirements: Commercial experience … Strong expertise in designing and maintaining scalable, high-performance web applications Hands-on experience integrating with AI models like ChatGPT A good understanding of databases Experience working on B2B software platforms with multiple users would be a bonus. If you’re a SeniorSoftwareEngineer (TypeScript) who enjoys the idea of working in a fast-paced More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Harrington Starr
SeniorSoftwareEngineer Key Technologies: C#, .NET, React, AWS, Docker, Kubernetes City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET SoftwareEngineer to join their growing team! This role provides the perfect opportunity … communication skills. Unrestricted right to work in the UK. This role offers hybrid working, with an office location based in the City of London. This role will suit a SeniorSoftwareEngineer, with expert C#, .NET experience and commercial use of React having a direct impact from the get-go. Apply below and if you have any More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Harrington Starr
SeniorSoftwareEngineer Key Technologies: C#, .NET, React, AWS, Docker, Kubernetes City of London, United Kingdom Perm Role: £80,000 - £120,000 Harrington Starr has partnered with a Global Financial Services Vendor and they are looking for a Senior C#, .NET SoftwareEngineer to join their growing team! This role provides the perfect opportunity … communication skills. Unrestricted right to work in the UK. This role offers hybrid working, with an office location based in the City of London. This role will suit a SeniorSoftwareEngineer, with expert C#, .NET experience and commercial use of React having a direct impact from the get-go. Apply below and if you have any More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Capsa AI
At a Glance Capsa is an AI platform that accelerates due diligence and deepens insights for Private Equity funds. We are hiring seniorsoftware engineers who are comfortable contributing across all layers of the application and developing features end to end. Details: Role : SeniorSoftwareEngineer - Full Stack Location : London, UK (Hybrid, In-Person … defense companies like QinetiQ and retail tech startups such as Standard AI. The entire team consists of early-stage startup veterans passionate about building exceptional products. The Role A seniorsoftwareengineer at Capsa is expected to own projects and features from conception to production, working across the stack to deliver improvements to our AI platform. Key … vision and will have a direct impact on its success. Have the opportunity for fast career growth. Enjoy yourself! Apply if: You have 4+ years of experience as a softwareengineer in a venture backed startup or top tech firm. You have taken entire products or features from ideation to production and you've measured their impact. You More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
Capsa AI
At a Glance Capsa is an AI platform that accelerates due diligence and deepens insights for Private Equity funds. We are hiring seniorsoftware engineers who are comfortable contributing across all layers of the application and developing features end to end. Details: Role : SeniorSoftwareEngineer - Full Stack Location : London, UK (Hybrid, In-Person … defense companies like QinetiQ and retail tech startups such as Standard AI. The entire team consists of early-stage startup veterans passionate about building exceptional products. The Role A seniorsoftwareengineer at Capsa is expected to own projects and features from conception to production, working across the stack to deliver improvements to our AI platform. Key … vision and will have a direct impact on its success. Have the opportunity for fast career growth. Enjoy yourself! Apply if: You have 4+ years of experience as a softwareengineer in a venture backed startup or top tech firm. You have taken entire products or features from ideation to production and you've measured their impact. You More ❯
City of London, Greater London, UK Hybrid / WFH Options
develop
Senior .NET SoftwareEngineer | London | 80,000100,000 + Bonus + Hybrid Location: Central London (Hybrid: 1-2 days in office) Salary: 80,000100,000 + performance bonus + excellent benefits Tech: .NET 8, C#, AWS, Microservices, REST APIs, SQL, CI/CD, Docker/Kubernetes The Opportunity We are working with a high-growth SaaS organisation … in Central London that is expanding its platform and engineering function, seeking a Senior .NET SoftwareEngineer to join its talented, cloud-first team. This is an outstanding opportunity to work in a modern engineering environment where quality, scalability, and automation are central to the culture. You will take ownership of new features, lead technical discussions, and … microservices-based environment. Expect greenfield projects, cutting-edge technology, and the chance to help shape the evolution of a platform used by thousands of customers. The Role As a Senior .NET SoftwareEngineer, you will play a key role in both development and design, responsible for: Building and maintaining scalable backend services using .NET 7/ More ❯
london (city of london), south east england, united kingdom Hybrid / WFH Options
develop
Senior .NET SoftwareEngineer | London | £80,000–£100,000 + Bonus + Hybrid Location: Central London (Hybrid: 1-2 days in office) Salary: £80,000–£100,000 + performance bonus + excellent benefits Tech: .NET 8, C#, AWS, Microservices, REST APIs, SQL, CI/CD, Docker/Kubernetes The Opportunity We are working with a high-growth … SaaS organisation in Central London that is expanding its platform and engineering function, seeking a Senior .NET SoftwareEngineer to join its talented, cloud-first team. This is an outstanding opportunity to work in a modern engineering environment where quality, scalability, and automation are central to the culture. You will take ownership of new features, lead technical … microservices-based environment. Expect greenfield projects, cutting-edge technology, and the chance to help shape the evolution of a platform used by thousands of customers. The Role As a Senior .NET SoftwareEngineer, you will play a key role in both development and design, responsible for: Building and maintaining scalable backend services using .NET 7/ More ❯
City of London, London, United Kingdom Hybrid / WFH Options
Formula Recruitment
Senior Backend Engineer – Build Tech That Powers Global Insights Location: London - Hybrid Salary: Up to £110,000 + benefits We are partnering with a fast-growing tech company that’s transforming how data is collected and used across industries. They’ve built a platform that simplifies complex research workflows, and they’re now looking for a Senior Backend Engineer to lead the charge on scalable, secure, and high-performance systems. This is a hands-on leadership role for someone who thrives in a collaborative, product-driven environment and wants to shape the future of a platform used by global clients. What you’ll do as SeniorSoftwareEngineer: Lead the design and … plus) Excellent communication and leadership skills If you want to build tech that matters and lead with impact in a company that values innovation, trust, and ownership then this SeniorSoftwareEngineer role is your chance to make a real difference. ** Unfortunately, due to the volume of applications, not all submissions will receive feedback More ❯
