401 to 425 of 606 Software Engineering Jobs in the City of London

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. … the stack and have real influence over the architecture, tooling, and direction of the product. 🎯 What They’re Looking For: 4+ years of experience in high-growth environments Strong engineering fundamentals and a deep product mindset A top-tier academic background – 2.1/First from top university Experience building and scaling real-world applications from scratch Passion for AI More ❯

We're a fast-moving startup building intelligent systems powered by large language models. We're looking for a software engineer who can design, build, and deploy AI systems end-to-end — especially those involving retrieval-augmented generation (RAG) , embeddings, and LLM orchestration. This is a hands-on role with real impact and ownership. 🔍 What You'll Work On … ve worked with tools like LangChain, LlamaIndex, Haystack, or built your own stack Hands-on with embedding models, vector DBs (e.g., FAISS, Weaviate, Qdrant), and retrieval logic Strong Python engineering skills — you write clean, production-ready code with tests Experience building and evaluating RAG pipelines in a real-world setting Familiarity with LLM evaluation techniques — you don’t deploy … Exposure to agentic systems , tools + memory management, or multi-step reasoning chains Experience in fast-paced, early-stage startup environments 🧪 Why This Role Is Unique You’ll be engineering AI features that ship to users , not just running experiments Evaluation is first-class — we’re serious about quality, not just "it looks good in the demo" You’ll More ❯

Founding Software Engineer – AI (Python/Typescript) £150,000 – £175,000 + meaningful equity On-site in London (£10K relocation provided) Join a deeply technical AI-native startup founded by PhDs and researchers from Cambridge, Imperial, and other top European and US institutions . This is an opportunity to work directly with a team who’ve published at leading … AI conferences, built open-source tools used across the industry, and scaled high-performance systems from first principles. Now, they’re hiring a Founding Software Engineer to help build the next generation of reasoning tools powered by large language models. The product is already live with paying customers, and the company is well-funded with serious growth ambitions. What … a world-leading university (e.g. Cambridge, Oxford, EPFL, ETH Zurich, ENS, TUM, etc.) Experience in AI-focused products, ideally within a high-growth or research-heavy environment Strong Python engineering skills; full-stack capability a bonus (Postgres, Typescript, React) A bias toward action, autonomy, and technical depth This isn’t a typical startup job. It’s a chance to More ❯

Automate Flows, Azure integrations, and Model-Driven & Canvas Apps. Comfortable in a pro-code environment while leveraging low-code solutions for rapid delivery. Ideal for someone with a .NET software engineering background who has evolved into a full-stack software engineer. Why You’ll Love Working Here Competitive Salary & Benefits : Up to £100,000+,25 days holiday More ❯

such as API's, PDF, Excel, HTML, CSV etc. In order to build this they are looking for a seasoned Python Engineer who has a good understanding of data engineering as well to help build this from scratch. You will be joining a small team with clearly defined scopes of what needs to be done, however you will need … be involvement with the stakeholders across the business so being able to confidently hold technical conversations in meetings is essential. Requirements: Professional experience as a Python developer in a software engineering context Strong knowledge of web scraping techniques and tools (e.g. BeautifulSoup, Requests, Selenium, or Scrapy) Understanding of website structures, and how to extract data Knowledge of modern More ❯

Founding Full Stack Software Engineer (AI) £150000 – £170,000 + meaningful equity On-site in London (£10K relocation provided) Join a deeply technical AI-native startup founded by PhDs and researchers from Cambridge, Imperial, and other top European and US institutions . This is an opportunity to work directly with a team who’ve published at leading AI conferences … built open-source tools used across the industry, and scaled high-performance systems from first principles. Now, they’re hiring a Founding Full Stack Software Engineer to help build the next generation of reasoning tools powered by large language models. You can be more front end or back end leaning provided you've worked in a similar high growth … leading university (e.g. Cambridge, Oxford, Imperial, Edinburgh, EPFL, ETH Zurich, ENS, TUM, etc.) Experience in AI-focused products, ideally within a high-growth or research-heavy environment Strong Python engineering skills; full-stack capability a bonus (Postgres, Typescript, React) A bias toward action, autonomy, and technical depth This isn’t a typical start-up job. It’s a chance More ❯

Specialist Talent that offer the ideal mix of skills, experience, and attitude, to place with our vast array of clients. From Project Change Professionals in large government organisations to Software Developers in the private sector we are always in search of the best talent to place, now. How Specialist Talent Works At Peregrine, we find the best talent for … of analytics practice within the organisation. Writing high quality python code using industry best practice for model training and deployment Skills criteria Strong python programming skills Good knowledge of software engineering best practice Experience with TDD (pytest or equivalent) Experience with cloud native deployments (currently in Databricks and Azure) Experience with Databricks Experience with managed endpoints, AKS or … data mining) used to draw key business insights and clearly articulate findings for target audience Desirable skills Graduate or Postgraduate qualification or equivalent experience in a relevant discipline e.g. engineering, mathematics, physics, statistics Experience of data science in finance, insurance or Ecommerce is an advantage but not required. Experience with neural networks and Tensor Flow, CatBoost, XGBoost, SKlearn, Pandas More ❯

Title: Blockchain Engineer Department: Enterprise AI and Engineering – Blockchain Centre of Excellence Location: Cannon Street, London (Hybrid) Job Type: Contract About Fidelity International Fidelity International offers investment solutions and services and retirement expertise to approximately 3 million customers globally. As a privately-held, purpose-driven company with a 50-year heritage, we think generationally and invest for the long … our colleagues, our clients, and the business. We call this “dynamic working.” Department Overview The Blockchain Centre of Excellence (BCoE) is a specialist unit within the Enterprise AI and Engineering division. The team’s mission is to explore and validate blockchain and distributed ledger technology (DLT) solutions relevant to Fidelity’s business and the broader financial industry. As a … Monitor emerging technologies in blockchain including zero-knowledge proofs, oracles, custody, interoperability, and DeFi applications. Your Skills and Experience Required: Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field. 7+ years in enterprise IT or software engineering, including 3+ years with blockchain/DLT. Proficient in Ethereum, Hyperledger, or comparable platforms. Hands More ❯

a fantastic opportunity for a friendly and experience leader who has line management experience ✨ They're open to interviewing a range of backgrounds whether you're a hands-on Engineering Manager right now, a Tech Lead or a Senior/Principal Engineer with people management experience this one could be for you. You will be supporting the team as … helping the backend Engineers to continue improving their skills and you'll be 60% hands-on. The rest of your time will be spent line managing a team of Software Engineers The Engineering team consists of mid level Engineers and they really need more experience on the squad, which is where you come in. 6 direct reports. More ❯

Bridge office. Responsibilities Design and optimise Azure cloud infrastructure to ensure scalability, performance, and reliability. Implement and manage Infrastructure as Code (IaC) using Terraform, streamlining deployment processes. Collaborate with software engineering teams to foster a robust DevOps culture and enhance CI/CD pipelines. Develop automation scripts and tools using Python to improve operational efficiency. Ensure adherence to More ❯

deployed models for performance, latency, and cost-effectiveness using tools such as CloudWatch, CloudTrail, and Prometheus. Write clean, maintainable code in Python (and optionally Java/Scala) following best software engineering practices. Automate model training, validation, and deployment workflows using CI/CD pipelines (e.g., CodePipeline, Jenkins, GitHub Actions). Ensure security and compliance in data handling and More ❯

Hays Software Engineering are looking for a Senior Developer to join a Derivatives team within a world-renowned Investment Management business to own developments within their Calypso & Broadridge platforms. What you will be doing: Drive Innovation: Lead enhancements for Calypso and Broadridge SFCM, shaping their future to better serve front, middle, and back-office users. Lead & Mentor: Share More ❯

trading strategies in commodity markets (e.g., energy, metals, agriculture) including Futures, spot and options. Analyse large datasets to identify market inefficiencies and trading opportunities. Collaborate with quantitative researchers and software engineers to back test and optimize strategies. Monitor and manage live trading performance, ensuring strategies operate within defined risk parameters. Contribute to the development of proprietary tools and infrastructure … macroeconomic trends, geopolitical events, and market structure changes affecting commodities. Required Qualifications: Bachelor’s, Master’s, or PhD in a quantitative field such as Mathematics, Statistics, Physics, Computer Science, Engineering, or Finance. 3+ years of experience in commodity trading, preferably in a quantitative or algorithmic environment. Strong programming skills in Python, C++, or similar languages used in quantitative research. More ❯

build and deliver on the product vision Support Senior Product Manager when required QUALIFICATIONS Post-secondary degree or significant equivalent experience Extensive experience in Product Ownership, Business Analysis or Software Engineering Experience in the insurance industry or financial industry a huge asset Previous experience working with agile development methodologies Clear understanding of product lifecycle and cerimoies Experience working More ❯

Or maybe you already do, but want a change of scenery and less red tape. If so, this is for you. They are looking to bring in an exceptional software engineer who can deliver hugely scalable, high performance streaming operations, as well as owning all aspects of development projects from start to finish. In terms of your experience, you … ll need to come from a strong software development background, building software to support their Risk, Middle Office or Data team. You will need to have strong development experience with C#. To really stand out, a first-class degree from a Russell Group University along with a background in financial services would be exactly what they need. They More ❯

Graduate Software Engineer - London Based - FinTech - Scale-Up Join a cutting edge, award-winning, scale-up aiming to help the growing population of renters secure a stable financial future. We are looking for enthusiastic full-stack engineers who are keen to join a hardworking but fun, sociable environment/workplace. This is a brilliant opportunity for an early-career … the planet Quick progression path Socials every month They are currently interviewing for the position so apply now if you think this sounds like the role for you! Graduate Software Engineer - London Based - FinTech - Scale-Up More ❯

Senior Python Software Engineer – London *Please note this role cannot sponsor. Please do not apply if you are seeking sponsorship* A Senior Python Engineer is required for an exciting and innovative Software sports betting company based in London. The successful candidate will be working closely with the quantitative researchers and alongside other extremely talented and driven engineers to … current team consists of one developer with 10+ years of experience, specializing in Python backend development. The team will grow in 2025. Essential Skills 5+ years’ experience in a Software Development role, with some Python experience and a track record of building robust, high-quality solutions. 1+ year in a leadership position, with a history of successfully guiding teams More ❯

Full-Stack Software Engineer | Start-Up | Python + JavaScript | £60k | London (4 days in-office) We’re working with a fast-growing, mission-driven London start-up looking to hire a Full-Stack Software Engineer to join their small, high-performing team. They're building smart, customer-first tech in a complex industry - and they need sharp, product More ❯

and you want to shape the future, this opportunity is for you. Given the highly technical nature of the work and their history of success through employing top-tier software engineers, they maintain high standards but also offer competitive compensation. Additionally, the package includes potentially very lucrative stock options. Ideal Front-End Developers should possess robust programming abilities coupled … company recognises that their exceptional products and commercial success stem directly from the technical dedication of their development teams; therefore, they ensure an environment that nurtures the talents of software engineers. Position : Front-End Developer Location : Soho, London (4 days onsite) Salary : £50-60k & stock options Key Skills : Typescript, JavaScript, React, Vue.js. More ❯

Junior Software Engineer (Python) – London (Hybrid, 3 days onsite) – Up to 2 Years' Experience 💼 numi is proud to partner once again with a market-leading asset management firm that’s reimagining the treasury function. Backed by cutting-edge tech and a world-class team, they’re driving innovation to cut financing costs and boost return metrics. We’re on … the hunt for a Junior Software Engineer with a Python focus—whether you're a recent grad or have up to 2 years of hands-on experience. You’ll help streamline client onboarding, build robust integrations, and play a key role in evolving the platform. 🛠 Tech Stack & Methodology Python (Dataclasses, Pandas, Asyncio) PostgreSQL , AWS (ECS, Lambda, SQS) Agile (XP More ❯

Developer | Python | Flask| Azure | 6 Months | London| £400 - £500 per day Peaple Talent have partnered exclusively with a fantastic household name client in London looking to hire a Python Software Engineer to work on their integration team within a large digital transformation. The tech stack includes; Python Flask/Flask API Azure integration Services – Logic Apps, Service Bus & API More ❯

the UK has to offer and make a genuine impact on the direction of a growing firm! This is a brilliant opportunity to work alongside some of the best Software Engineers in London and grow both technically and personally. As well as enjoying a fast work environment that strives for continuous results. This is a 6-month contract with More ❯

My high-end retailer are looking for a Software Engineering Manager to lead the NAV team and play a pivotal role in our migration to Microsoft Dynamics 365 Business Central, while also supporting our Integrations team in building scalable middleware solutions. What You’ll Do Initial Focus Lead the NAV to BC migration Collaborate with Principal Software More ❯

gaming, defense, and automotive? I'm hiring on behalf of a pioneering deep tech client developing next generation compression and AI technologies . They are looking for an exceptional Engineering Manager to lead their technical research group. About the Company This company is transforming how data is processed, compressed, and delivered . With a strong foundation in AI, data … and media, live event production, eCommerce, security, aerospace , and more. The culture is collaborative, empowering, and focused on innovation at every level. The Role You will join as an Engineering Manager to lead a small, high impact research team focused on: • Video and point cloud compression • AI and ML applications such as Generative AI, intelligent edge, media indexing • Algorithm … optimization for performance and visual quality You will work closely with engineering, product, and commercial teams to ensure research outcomes are translated into practical and commercial solutions. What You Will Do • Lead research initiatives with real world product impact • Guide and mentor a team of researchers • Collaborate cross functionally to bring R&D outcomes into engineering pipelines • Stay More ❯

Java Software Engineer - Brand new and exclusive to Miller Maxwell - Front-office engineering team - Low-Latency trading. Miller Maxwell is assisting a electronic trading company seeking to hire a Java Software Engineer expanding their team in 2025. The Java Software Engineer will be a key contributor to the development and enhancement of proprietary trading systems and … surrounding ecosystem's. The Java Software Engineer will be required to have worked on the development of electronic trading systems. The Java Software Engineer will: Enhance and develop core features trading platform software. Build trading engines, micro-services, low-latency tools. Work to develop solutions around new products requested by trading and front-office teams. Work within their … TDD and BDD environment. Research and look to continuously improve the systems and introduce new technology. The Java Software Engineer qualifications: A degree in a STEM-related subject. At least eight years of commercial Java experience. Experience working on the development of electronic trading software is required for this position. Java concurrency is essential. FIX Protocol - FIX Connectivity More ❯