251 to 275 of 570 Software Engineering Jobs in the City of London

Elixir Software Engineer Industry: Software Development/Finance/Banking Location: London/Hybrid Salary: £40-80,000 Base Salary X4 Engineering are proud to be working with a disruptive digital finance scale-up that’s changing the way modern banking platforms are built and connected. With clients ranging from agile startups to global fintech innovators, this … company is expanding its backend engineering team to meet fast-growing demand. As part of this journey, they’re hiring Backend Engineer's to design and scale robust APIs, integrate with a diverse range of banking systems, and shape the future of programmable finance infrastructure. Key Requirements: A technical degree (BSc/MSc) in Computer Science, Software Engineering More ❯

Software Engineer - Solution Design Exp London - Onsite 2 days a week 6 months IR35 Status: Outside We are seeking a Software Engineer to lead the orchestration, design, and delivery of complex product initiatives supporting our clients growth, who are a leading Insurance company in the UK. This role requires a hands-on technical leader who can drive architectural … excellence, ensure adherence to engineering and enterprise standards, and optimise the efficiency of engineering delivery. You will play a critical role in shaping the technical vision, mentoring engineers, and ensuring seamless execution across the development lifecycle. Responsibilities: Guide development teams with hands-on expertise in AWS serverless architectures (Lambda, API Gateway, DynamoDB, Step Functions, S3, SNS/SQS … using Angular, ensuring a seamless and scalable user experience. Ensure robust CI/CD pipelines, infrastructure as code (IaC), and deployment automation practices. Key Skills & Qualifications: Solid experience in software engineering, with significant exposure to technical leadership and architecture. Proven expertise in AWS serverless architectures, including hands-on experience with key services. Strong proficiency in Python for backend More ❯

work every year for the last decade . They’re leading the AI revolution — and right now, they’re hiring into their elite 3D simulation division, building next-gen software for major players in San Francisco, Tokyo, and beyond. You’ll be developing high-performance simulation tools (C++17/20), working on cutting-edge CFD, meshing, and flow networks … solving real-world physics for global technology giants. Experience Required: Very Strong C++ A engineering degree in Physics, Mathematics, Mechanical Engineering, Computer Science, etc 3 to 5 years' experience building technical or scientific software Must have experience in one of the CFD (Computational Fluid Dynamics) or something similar such as FEA, CAD, CAE, differential equations, or numerical More ❯

Our client, a major High-Frequency Trading firm, is looking to hire a C++ Software Engineer to help develop and build out their HFT and MFT trading platforms. This individual will work closely with one of the firm's most successful Trading teams to help optimise their trading platforms and strategies. This role gives you the opportunity to join … and optimization of a top-class trading system Collaborate with a close-knit team comprised of passionate and knowledgeable individuals who embrace a flexible working environment Uphold the best software development practices, including continuous integration/continuous deployment (CI/CD) and rigorous code reviews Desirable Candidates: 3+ years of hands-on experience with C++ Software Engineering … HFT firm, Hedge Fund or leading investment bank) Previous exposure working on Trading Systems Experience with Python development would be a plus Familiarity with Linux BS in Computer Science, Engineering, or related quantitative discipline To discuss the role in confidence, please reach out to Rhys at rhys.nugent@capitalmarkets.ie . More ❯

Senior Software Engineer – AI Startup – Up to 120k 🚀🧠 💰 Salary: £70,000 - £120,000 + meaningful equity 🏙️ Location : London, flexible working arrangements, ideally 1/2 days in office 💻 Tech Stack : Python, Flask, FastAPI, React, TypeScript, GCP (Backend Leaning) Our y-combinator backend client are building an elite engineering team within the AI space. The platform is being used … and want to solve real-world problems with the latest in AI and LLMs, this role is for you. In this role, you’ll: 🔧 Build and ship high-impact software 🧠 Work on AI/LLM-powered automation tools used in production 🏗️ Help shape scalable systems and infrastructure 🌍 Work collectively across teams to push the product forward 💻 Be working end … working closely with customers and value their needs ✅ Are excited by deep technical challenges and solving them simply, don't over complicate it ✅ Bring ideas and improvements to their engineering processes ✅ Are adaptable and comfortable working across their stack ✅ Understand the working dynamics of a fast paced start-up If this role sounds like it could be of interest More ❯

Principal Software Engineer London (Bank – Three days a week in the office) £90k-£100k We’ve partnered with a global insurance company as they continue to grow their Engineering team – they’re seeking a Principal Software Engineer to lead & drive innovation & quality across the software development lifecycle. The company are working on several new products, so … work on multiple greenfield projects. This is a hands-on position with the expectation of technical leadership & excellence, where you will take on a leading role in mentoring, architecture & software design. You’ll become a subject matter expert & will champion software development best practices across the wider business. It’s essential to have had a background that has More ❯

Front End Software Engineer/React UI JavaScript, React, typescript, Redux, NodeJS, GraphQL, ApolloQL, Webpack, Cypress, HTML, CSS, REST, Data Visualisation, API - Perm Role – London – Hybrid £80'000- £100'000 plus bonus Harrington Starr has partnered up with a Global Exchange company that are looking to hire a UI Developer with expert Software Engineering skills using JavaScript … with Systems design and development. Experience with Typescript Experience with Data Visualisation development. HTML and C55 Experience with Webpack Experience with GraphQL RESTful API development. BSc with Computer Science, Engineering or Mathematics. More ❯

Software Developer – Platform Storage 📍 London | Hybrid | Permanent 💰 Exceptional Compensation + Bonus + Benefits We’re supporting a global investment firm in hiring an experienced Software Developer to join their Platform Storage team (Golang focused) - a core part of their infrastructure group responsible for scaling and optimising storage systems that support critical research and trading workloads. This role offers … data access across diverse storage technologies. Integrate open-source and vendor storage solutions through rapid prototyping and engineering. Optimise storage performance and efficiency across large-scale infrastructure. Collaborate across engineering functions to deliver robust end-to-end platform capabilities. Own operational responsibilities: troubleshooting, performance tuning, and user support. Your Background: 5+ years' development experience with a degree in Computer … Science, Engineering, or related field. Strong programming skills in Go (ideally) Rust or C++. Solid experience in building and supporting complex backend systems at scale. Experience with Elasticsearch, Prometheus, Grafana and/or Datadog. Exposure either AWS or GCP plus IaC, (Terraform or similar) would be beneficial. Knowledge with open-source storage tools (Ceph, Minio, JuiceFS or Fuse) and More ❯

Software Engineer - £70-120k salary range - London Hybrid - AI Workflow Automation Product TDL are working with a Series A, ambitious start-up who are tackling manual admin heavy tasks across Fintech, Insurance and other surrounding sectors via their AI/LLM powered products. They are on the hunt for 2 new Developers to join the London based Engineering … ll have at least an interest and have tinkered personally with LLM type projects. Huge bonus if you have commercial experience in this area alongside the above product stack. Engineering team is relatively flat under the CTO with Mid through to Staff Engineers all contributing code as their main role. Hybrid working London approx 2 days per week. Please More ❯

Software Engineer | AI FinTech | £120,000 p/a + Direct Equity 💻 Software Engineer 💱 Emerging FinTech startup combining AI with financial analysis 💰 Up to £120,000 per annum + Direct Equity ⚙️ Stack: Typescript, React/Next, Node, SQL We are working with an exciting startup just exiting stealth mode with $5m pre-seed funding, already with paying customers. … yielding excellent results. They are working at the forefront of professional and meaningful AI-Human interaction and possibilities in a professional setting. We are looking for a Full Stack Software Engineer with multiple years' experience in a Typescript, React/Next and Node based stack. You'll join a cross-functional founding engineering team from leading blue-chip … Prior financial and agentic AI experience isn't required, but an interest in these fields will significantly help in the application and the role itself. If you're a Software Engineer wanting to create new possibilities in the world of AI and finance, apply within or reach out to James for more info. Software Engineer | AI FinTech More ❯

My client is a market leading Algorithmic Trading firm based in London, specialising in market making and liquidity provision for Exchange Traded Funds. The are looking for a Java Software Engineer to join their engineering group. What You'll Get An opportunity to work in one of the most exciting and fast growing algorithmic trading businesses in the … risk-management and performance-tracking tools. What You'll Need Strong academic background in STEM discipline Strong computer science fundamentals in Design, Algorithms & Data Structures Strong low latency Java engineering skills Rust experience will be beneficial as they will be using it in new projects Familiarity with databases (e.g. SQL Server, Postgres) Familiarity with developing, testing, or deploying with … a Cloud Server Provider (e.g. AWS, GCP, Azure) Experience using version control software (e.g. git) Strong programming ability and testing mindset More ❯

TypeScript Software Engineer - Salary: £80’000 plus bonus and benefits. NodeJS, JavaScript, TypeScript, Cloud Tech, Terraform, AWS. Harrington Starr has partnered with an innovative Digital Currency Investment Platform Company that specialise in developing unique software systems for clients for invest into Digital Markets from Pensions, Investments and Fund Management. This is an exciting opportunity to join a small … ecosystem. This organisation are developing cutting edge web-systems, which are being used globally and are offering the opportunity for you to play a pivotal role within the full software development life cycle. We are looking for an experienced TypeScript Software Engineer with NodeJS, JavaScript, TypeScript and NodeJS and including cloud technologies mainly AWS and Terraform You will … in Computer Science - Required A leader within their community and a specialist Development team already in place, due to recent success they are looking to further build out their Software Engineering team in their London Office. You will be working on cutting edge platforms for Trading and analytics for Digital Investments. If you feel you are ready to 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 that disrupt an industry … 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 team … 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 performance, reliability and More ❯

Software Engineer - London, 2 days on site My client is building AI voice tech and need a hands-on engineer to help us scale. You’ll work across the stack (mostly backend), ship features, and own your work—no micromanagement here. What you'll do: Build and maintain full-stack features (with a backend focus) Integrate with third-party … services Contribute to AI voice R&D and prompt engineering Own your work—you’ll have autonomy and trust What we’re looking for: 4+ years’ experience Extensive experience working with Python and frameworks Solid with SQL/NoSQL, REST APIs, and DevOps basics Clear communicator, self-starter Very nice to have: LLMs or voice tech experience Real-time More ❯

Technical Architect - Data Engineering/Azure Contract 6 months Rate £400 per day outside IR35 Location: London Fractal is a strategic AI partner to Fortune 500 companies with a vision to power every human decision in the enterprise. Fractal is building a world where individual choices, freedom, and diversity are the greatest assets. An ecosystem where human imagination is … business problems using creative solutions, then we wish to talk with you. As a Lead Architect (Azure), you will work in the Technology team that helps deliver our Data Engineering offerings at large scale to our Fortune clients worldwide. The role is responsible for innovating, building and maintaining technology services. Responsibilities: Be an integral part of large-scale client … business development and delivery engagements. Develop the software and systems needed for end-to-end execution on large projects. Work across all phases of SDLC, and use Software Engineering principles to build scaled solutions. Build the knowledge base required to deliver increasingly complex technology projects. Qualifications & Experience: A bachelor’s degree in Computer Science or related field More ❯

transform energy from a cost into a strategic asset, aligning with net-zero goals while improving operational efficiency. Why You Should Join Us 🧠 Work with a highly motivated, senior engineering team that values simplicity, autonomy, and impact. 🌍 Enjoy full remote flexibility – work from wherever you're most productive. 💰 Competitive compensation – we believe in rewarding outstanding work appropriately. 🚀 Be part … our systems and influence how businesses across the UK interact with their energy supply. Your day-to-day will include: Architecting and building reliable, scalable systems to support our software and marketplace platform. Driving pragmatic improvements in a brownfield codebase. Collaborating with a cross-functional team to align technical direction with business outcomes. Mentoring teammates and helping raise the … engineering bar. What We’re Looking For 💻 Deep expertise across the stack , especially in JavaScript/TypeScript, SQL databases, and AWS infrastructure. 🧱 Strong architectural instincts – you’ve designed and delivered robust, scalable systems before. 🔧 Hands-on refactoring experience – you're comfortable navigating legacy systems and improving them iteratively. 👥 Team-first mindset – you’re humble, collaborative, and put outcomes above More ❯

Software Engineer - Up to £120k + Equity Salary: £80,000 – £120,000 + Equity About Them Our client are a fast-growing AI startup revolutionising the video intelligence space. They've been building a cutting-edge video AI platform that delivers real-time insights and exceptional user experiences across various industries. Their team, composed of experienced professionals from leading … such as Typescript & React. Experienced with databases such as Redis & Postgres Stay current with deep learning research and propose practical applications in the video AI domain. About you Solid software engineering skills with a focus on writing production-grade code. Experience with PyTorch and Python 3; familiarity with C++ preferred. Experience with containerisation (Docker), model profiling. Why Join More ❯

Job Title: Senior Software Engineer Location: London Salary: £100,000 We’re searching for a Senior Software Engineer to play a key role in advancing our technology within one of our clients based in London. This is an opportunity not just to code but to innovate. We need someone who can approach challenges strategically and thrive in mastering … flexibility and passion for learning are what will make you stand out. Key Responsibilities: Lead technical projects by applying your expertise in C# and other technologies to develop scalable software solutions. Working with AI and emerging technology in this space. Oversee the design, implementation, and maintenance of high-quality code. Foster a culture of collaboration and rapid, efficient development. … Work with cross-functional teams to streamline the creation and delivery of software solutions. Guide the team on technical projects, making an impact through your expertise. Mentor junior team members and foster a culture of continuous learning and technical growth. Profile: A forward-thinking, adaptable engineer passionate about creating cutting-edge solutions. Proactive and self-motivated, thriving in a More ❯

Our Principal Software Engineers are responsible for leading and delivering strategically significant, complex client engagements across our portfolio of clients. We believe that great delivery stems from a thorough understanding of our clients and their needs, strong discipline skills and subject matter expertise, excellent leadership and a clear vision of lasting and effective change in a public sector environment. … We expect our Principal Software Engineers to bring all of that and enthuse our delivery teams with the same passion. The successful candidate will lead the Software Engineering aspects of our client engagements while overseeing the wider delivery within the account (or industry) when appropriate. In addition, our Principal Software Engineers are responsible for engaging with … trusted advisor relationships. They will also oversee multiple, concurrent client deliveries to help ensure quality and drive the sharing of best practice across our engagements and industries. Our Principal Software Engineers are members of the Software Engineering Practice leadership team with the responsibility to develop the capability of the practice to meet business needs and to accelerate More ❯

Senior Software Engineer (Python, JavaScript/TypeScript), London Hybrid, £100,000 + Equity + Benefits, Life Changing Industry The Opportunity: An opportunity to join a well-established business in the centre of London operating across the healthcare industry, as Senior Software Engineer. This position will allow you to not only be a Engineer but one that is valued … organisations long term goal. Your skills will be needed to build a range of products for consumers such as web applications and products that track health related issues. The software that you build will have a direct impact on the consumer, and a positive influence on people’s lives. The Role: An opportunity to work for top health care … to impress- then this is the one for you. Responsibility: Contribute to or lead a significant part of the implementation and deployment of services within your team. Apply principled engineering practices including unit testing, integration testing, continuous integration and, by your example, lead others in your team to do likewise. Develop your technical understanding to support and build your More ❯

Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)🧑‍🚀 One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial , this venture is already attracting serious attention within the AI space!! Currently … in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up! 💡 About the Company Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done it well. … direction of the product. 🎯 What They’re Looking For: A top-tier academic background – Oxbridge, Imperial, or equivalent 4+ years of experience in high-growth start-up environments Strong engineering fundamentals and a deep product mindset Experience building and scaling real-world applications from scratch Passion for AI and enthusiasm for working in a fast-moving, collaborative setting A More ❯

Learning team to understand the underlying concepts and user flows; however, you are not required or expected to have background in Machine Learning. We are looking to hire a software engineer with with a strong sense of aesthetics. We would love to see your recent frontend works! If possible, please include the link(s) to your portfolio in your … Tailwind. We use Figma for wireframes and ideation. We are highly confident in our backend API schemas and functionality. What we are looking for: Frontend development: Experience in frontend engineering, developing and designing responsive web applications using TypeScript. Knowledge of the frontend fundamentals: Familiarity with the core technologies, including HTML5, CSS3, TypeScript and React. Design systems: Understanding of popular … an impact on day one. Competitive salary, equity and benefits package. 28 days + public holidays allowance. Opportunities for professional growth and progression with your career. Work on challenging engineering problems that have a real impact on the industry. Work with high-profile customers and technology partners. More ❯

Frontend Software Engineer We are looking for a highly motivated Frontend Software Engineer (hybrid in London) to join an early stage technology company. This is a rare chance to join a startup at the very beginning - where your curiosity, ideas, and input will directly influence the product roadmap. You’ll be working closely with a small, experienced engineering team, building real features in a modern codebase from day one. As a Frontend Software Engineer, you’ll join a small and growing R&D team focused on building ambitious new products from the ground up. You’ll work on real product features, contribute to design and development decisions, and grow your technical skillset by collaborating with a More ❯

Learning team to understand the underlying concepts and user flows; however, you are not required or expected to have background in Machine Learning. We are looking to hire a software engineer with background in UI/UX design, and with a strong sense of aesthetics. We would love to see your recent frontend works! If possible, please include the … ideation. We are highly confident in our backend API schemas and functionality. What we are looking for: Frontend development: At least 2-3 years of industry experience in frontend engineering, developing and designing responsive web applications using TypeScript. Excellent knowledge of the frontend fundamentals: In-depth knowledge of the core technologies, including HTML5, CSS3, TypeScript and React. Design systems … an impact on day one. Competitive salary, equity and benefits package. 28 days + public holidays allowance. Opportunities for professional growth and progression with your career. Work on challenging engineering problems that have a real impact on the industry. Work with high-profile customers and technology partners. More ❯

discreetly at the sharp end of the missions in National Security. Having scaled quietly and organically since incorporation, they are set to accelerate their growth by hiring more exceptional Software Engineers to complement their 20-strong team. Here, you’d work hand-in-hand with the customer and your colleagues on complex and purposeful engineering projects. This business More ❯