1 to 25 of 149 Senior Software Engineer Jobs in Central London

Senior Software Engineer Node.js/AWS/React London (Hybrid, 3 days onsite) Are you the kind of Senior Software Engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust? This is a chance for a Senior Software Engineer 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 Senior Software Engineer, 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 ❯

Senior Full Stack Software Engineer Tech : AWS, NodeJS, TypeScript, JavaScript, ReactJS, React Native Why? start-up financial services, revolutionising the industry Location : Hybrid - 1/2 days in the office (Central London) Our Client A new UK-based financial services provider is launching credit card, personal loans and insurance offerings aimed at delivering fair, flexible, and user … friendly financial products to consumers. The organisation is committed to empowering individuals by enhancing their understanding and control of personal finance through clarity, intelligence, and technology. Senior Full Stack Software Engineer - Responsibilities Design, develop, and maintain advanced applications. Collaborate with cross-functional teams to define, design, and ship new features. Guiding and develop the skills of junior … quality and speed. Troubleshoot and debug to optimize performance. Provide code reviews, feedback, and mentorship to junior developers. Stay up-to-date with new technology trends, applications, and protocols Senior Full Stack Software Engineer - Experience Required Proven experience as a Senior Full Stack Developer or similar role with a strong portfolio of projects. Expertise in Node.js More ❯

Contract role : Senior Software Engineer : Up to £475 per day Outside IR35 : 9 months rolling : Hybrid Monthly (London) An innovative digital consultancy is looking for experienced Senior Software 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 Senior Software Engineer, 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 Senior Software Engineer, 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 Senior Software Engineer to join a high-performing development team. Contract role : Senior Software Engineer: Up to £475 per day Outside IR35 : 9 months rolling : Hybrid Monthly (London) *Unfortunately, due to the More ❯

Senior Software Engineer | Blending Music, Science and Technology 💻 Senior Software Engineer 🎶 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 Senior Software Engineer, proficient in Typescript & React with some Node + AWS experience to join a founding team of customer-centric, cross functional engineers. If you are a … Senior Software Engineer 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. Senior Software Engineer | Blending Music, Science and Technology More ❯

Senior Software Engineer | 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 Senior Software Engineer 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 Senior Software 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 Senior Software Engineer: 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 ❯

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 within the trading … You are collaborative with excellent communication and stakeholder management skills You are degree educated in Computer Science or similar technical discipline What's in it for you: As a Senior Software Engineer/Developer you will receive a competitive package: Salary to £150k Bonus paid every six months based on personal performance (10-25%) Professional development 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 people come from More ❯

Being a Senior Software Engineer at Privalgo We are looking for a dynamic and forward-thinking Senior Software Engineer. We need someone that can hit the ground running, remaining accountable as you work alongside a globally distributed team. As a Senior Software Engineer, 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 Senior Software Engineer, 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 ❯

Senior Software Engineer (React, Node.js, AWS) Salary: £90,000 - £110,000. Location: Hybrid in London. Senior Software Engineer (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 Senior Software Engineer, 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 Senior Software Engineer with strong experience working in JS/TS, please apply. More ❯

Senior Software Engineer | 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 Senior Software Engineer 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 senior engineer 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 ❯

Senior Software Engineer/Developer (TypeScript Node.js) Remote UK to £80k Are you a senior, hands-on Software Engineer looking for an opportunity to take ownership and progress your career at a scaling tech company? You could be joining a growing games company that combines state of the art technology, gaming and luxury fashion. … 80k Remote working Private medical care Life Assurance 25 days holiday plus your birthday off Impactful role with excellent career progression as the company scales Your role: As a Senior Software Engineer you'll join the team as they scale the product to support millions of users. You'll design and deliver high-quality, maintainable backend code … management systems, collaborating with product and game teams to ensure alignment of features with backend architecture and with DevOps to ensure uptime, observability and deployment reliability. This is a senior role where you'll take ownership of complex systems and proactively address potential performance and scalability bottlenecks. Location/WFH: You can work from home from anywhere in the More ❯

Role : Java Software Engineer 💰 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 Software Engineer 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 Software Engineer: 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 Software Engineer: 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 ❯

Senior AI Software Engineer - London (3 days a week) - up to £150K plus equity London based - 3 days a week Visa sponsorship is available Salary up to £150K with equity on top A venture-backed Fintech company is looking to hire a Senior AI Software Engineer to join their London based team. This is … Computer Science graduates with at least 1 year working in a core AI engineering role within an AI-first company and 3 years experience or more working as a Software Engineer, Backend Engineer, ML Engineer or Product Engineer. Senior AI Software Engineer - London (3 days a week) - up to £150K plus equity More ❯

Senior Software Engineer | High-growth, Purpose-Led and A* funded Fintech | Hybrid – London **Python, TypeScript, React** A leading fintech scale-up is hiring a Senior Software Engineer 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 Senior Engineer, 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 ❯

Senior Software Engineer - 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 Senior Software Engineer, 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 Senior Software Engineer (TypeScript) who enjoys the idea of working in a fast-paced More ❯

Senior Software Engineer – Full Stack ⚙️ TypeScript, React, Node 📍 London | Hybrid (3-days per week) 💰 up to £100K + Equity We’re partnering with a fast growing London founded scale up that is transforming how companies manage and empower their people. Their intuitive integration rich platform replaces outdated HR systems with a single beautifully designed hub, helping HR … admin and focus on what really matters. Backed by top tier investors and already trusted by a global customer base, they are now expanding their engineering team with several Senior Full Stack Software Engineers to help take their product to the next level. The Role As a Senior Software Engineer, you will: ✨ Design, build and … enjoy working across the product 🧠 Can make thoughtful architectural decisions in a scaling environment 🗣️ Are comfortable working closely with stakeholders across teams to solve complex problems 🎨 Care about crafting software that balances powerful functionality with excellent usability What’s on Offer 💷 Competitive salary (up to £100K) and meaningful equity in a high growth company 🏢 Hybrid working model with a More ❯

Senior Software Engineer (Node.js) Location: Hybrid working in London Salary: £80,000-95,000 + options Are you passionate about using technology to tackle real-world sustainability challenges? As a Senior Software Engineer (Node.js), you’ll be at the heart of building scalable backend systems that process and analyse massive streams of performance data … production-grade backend systems. Strong proficiency in Node.js, JavaScript/TypeScript. Solid understanding of distributed or event-driven systems. Experience with cloud platforms, AWS ideally. If you’re a Senior Software Engineer (Node), looking to work in an early stage start-up, please apply. More ❯

Senior Software Engineer Key Technologies: C#, .NET, React, JavaScript, Typescript, AWS, Docker 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 Software Engineer to join their growing team! This role provides the perfect … 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 Senior Software Engineer, with expert C#, .NET experience having a direct impact from the get-go. More ❯

Senior Software Engineer – SaaS and Payments London (4 days onsite) £80,000 to £100,000 base plus package A high-growth B2B fintech scale-up transforming how complex industries handle payments and financial workflows are growing their engineering team! They’re profitable, well-funded, and engineering-led, and as their newest Engineer you’ll shape their … core platform and take ownership of critical features. This is a hands-on senior role where you can influence the technical direction, own features and build software that has a real impact. As a software engineer you will: Build and scale end-to-end features across the full stack using .NET and React Work with SQL … CD pipelines, testing and version control practices Solve complex technical problems and deliver simple, user-friendly solutions Collaborate closely with product managers, designers and engineers to ship high-quality software Bring your experience in SaaS and payments to influence product and architecture decisions We are looking for someone with: A minimum of 5+ software engineering experience, ideally including More ❯

Senior Software Engineer/Developer (TypeScript Node.js) London/WFH to £100k Are you a senior technologist looking for an opportunity to progress your career in a hands-on role where you can make an impact? You could progressing your career at a scaling tech company that has developed a digital distribution platform transforming electronic trading … options market via a central marketplace where institutions can place, discover and match option interests electronically - improving liquidity and efficiency for all participants as the platform scales. As a Senior Software Engineer you will collaborate with a small team of technologists and successful entrepreneurs to design and implement intelligent solutions to business needs, with a focus on … communication skills What's in it for you: Salary to £100k Stock options Impactful role with excellent career growth Remote working Apply now to find out more about this Senior Software Engineer/Developer (TypeScript Node.js) opportunity. More ❯

Senior Software Engineer | £80,000 - £100,000 | Hybrid | Python | Django Location: London (2-3 days on-site) Salary: £80,000 - £100,000 (DOE) Tech Stack: Backend: Python - Django OR Flask OR FastAPI Frontend: React, TypeScript Cloud: AWS OR Azure OR GCP Are you an experienced Software Engineer who thrives in fast-moving, product-led environments … We’re partnered with an innovative AI-driven organisation using intelligent automation to simplify complex, everyday challenges. Their technology combines modern software engineering with a user-led approach to deliver smarter, more efficient digital experiences. This is an opportunity to join a small, high-performing engineering team at a pivotal stage of growth, contributing to architecture, delivery, and innovation … changing products, you’ll feel right at home here. Benefits: 25 days holiday + your birthday. Hybrid working (2–3 days in the office). Opportunity to grow into senior or lead roles as the team expands. Work closely with a small senior team on next-generation AI products. Interested in joining a team building meaningful AI products More ❯

At a Glance Capsa is an AI platform that accelerates due diligence and deepens insights for Private Equity funds. We are hiring senior software engineers who are comfortable contributing across all layers of the application and developing features end to end. Details: Role : Senior Software Engineer - 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 senior software engineer 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 software engineer 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 ❯

Role: Senior Software Engineer (with DevOps) Location: Remote (with occasional monthly collaboration days) Are you... A software Engineer with 5+ years experience, working with modern programming with one or more programming languages, Python and/or Golang, Java, Ruby, TypeScript etc? Experienced working on cloud platform such as AWS, Google Cloud and have a good … pop into the office to meet colleagues or even change if scenery when you like? About: Our client are a "Scale-Up" cloud solutions consultancy, helping customers to optimise Software & Cloud, covering DevOps, DevSecOps, Transformation, Strategy and more. Due to recent successes in the continued commercial strategy, we are now looking to grow the engineering footprint significantly to build … new teams for new customer engagements. As a Senior Software Engineer, you will have the opportunity to work across various industries and sectors. This diversity ensures that no two projects are the same, allowing you to gain valuable insights into the unique challenges faced in different domains. The Technology/Skills: As mentioned, every project is a More ❯

Senior Software Engineer (Python) Hybrid London (1–3 days per week) Up to £80,000 + Benefits Are you a passionate Python engineer who thrives on building scalable, high-quality software? We’re working with a multi-award-winning digital agency , recognised as one of the Sunday Times Best Places to Work , that’s looking … for a Senior Software Engineer (Python) to help shape the next generation of their data-driven tools and products. 💡 Why this role? Work at the intersection of data, automation, and AI , delivering tools that drive measurable impact for global brands. Join a collaborative, innovative engineering culture where learning, experimentation, and technical excellence are at the core. Hybrid … technical bar across the team. Staying hands-on while contributing to the architectural direction and long-term roadmap. 🎯 What we’re looking for: 5+ years of experience as a Software Engineer, ideally in Python (3.10+). Proven experience developing cloud-native applications (GCP or AWS). Strong understanding of CI/CD pipelines (e.g. GitHub Actions) and containerisation More ❯

Senior Golang Software Engineer - AI Scale-up - Voice AI (Permanent - flexible salary) Senior Golang Software Engineer is now required by an Innovative AI scale up to build the strategic architecture platform for their AI product offering This role will be responsible for building a stable and replicable architecture for their core application, focusing on … application journey. Implement secure on-device storage for sensitive data. Collaborate with back-end engineers to successfully integrate RESTful APIs for data collection and AI services. Key Requirements: Strong Senior Software Engineer experience Exceptional Go/Golang skills Experience working across low-latency and zero trust platforms Experience across more than 1 cloud platform (AWS, Azure and More ❯

Senior Full-Stack Software Engineer -hybrid, London 2-3 days a week in the office -up to £120K An early-stage B2B SaaS company seeks a Lead Software Engineer to join their UK based team. The role requires significant experience across Full-stack Engineering in addition to experience leading software engineers. The company is … with multiple languages and has an open mind to finding the best technologies to solve their customers’ problems. About you : We’re looking for a hands-on Full-Stack Software Engineer who has experience in early-stage and scale-up technology companies. You must thrive in an environment where you work closely with customers and relish in receiving … their feedback. The tech: -Python -React, Typescript -APIs -Databases -Infrastructure Senior Full-Stack Software Engineer More ❯