351 to 375 of 549 Software Engineering Jobs in the City of London

Senior PHP Developer Salary up to £80,000 + Benefits. Office based in South East London - 1/2 days per week in the office. For more information, please email ryan.horne@searchability.com With the recent doubling of our active members More ❯

GoLang Developer London, UK 6 Month Contract An incredible opportunity for an experienced GoLang Developer with advanced backend engineering skills to join a prestigious tech client on a contract basis. This company is renowned for its engineering excellence, and they're looking for a GoLang Developer who can take their distributed systems to the next level. As a … GoLang Developer, you'll be working on mission-critical, data-intensive applications that push the boundaries of technology, taking ownership of the full software engineering lifecycle, including design, development, and implementation. Reporting into an Engineering Manager, the GoLang Developer will also leverage modern technologies like AWS, Kubernetes, Docker, and Kafka, whilst also architecting and implementing microservices-based … be responsible for optimising system performance, reliability, and scalability, as well as participating in code reviews, design discussions, and knowledge sharing. GoLang Developer - Key Requirements: Significant professional experience in software development, with a strong focus on backend systems Proficiency in Go/Golang and proven expertise in AWS, Kubernetes, and Docker Experience with end-to-end software engineering More ❯

Full Stack Engineer Build Bold Technology. Make a Meaningful Impact. Are you an experienced software engineer looking for more purpose in your work? Do you thrive in dynamic, start-up environments where your voice and skills truly matter? Excited by the idea of developing cutting-edge products that push boundaries and deliver real-world change? If this sounds like … Great Our client is a fast-growing Tech for Good start-up, born from world-class research and backed by serious ambition. They're developing a next-generation hardware-software product that combines deep tech innovation with real human impact. As part of a small, highly capable team, you’ll work at the forefront of product engineering - influencing … s what you’ll get to do: Contribute to the design and development of a groundbreaking new product from the ground up. Take a lead role in shaping the software architecture across the entire stack. Collaborate with cross-functional teams including UX, hardware, compliance and product. Code with clarity, scalability and maintainability in mind - always thinking a few steps More ❯

are empowered to make real impact. Role Overview They're looking for a skilled and passionate Backend skills in Node.js . You will be part of a high-performing engineering team building robust and scalable backend services, with opportunities to contribute to frontend features using React . Exposure to AWS and/or Next.JS is a strong plus. Key … agile environment Deploy and manage applications on AWS (experience here is a plus) Write clean, maintainable, and well-tested code Key Skills & Experience Required: 3–5 years of professional software development experience Proficiency in Node.js. Good understanding of software engineering principles, REST APIs, and asynchronous programming Experience with modern frontend development, ideally with React Nice to Have More ❯

understanding of Agile Methodologies Strong verbal and written communication skills Ability to explain technical problems to non-technical people About Us: Ascendion is a leading provider of AI-first software engineering services. Our applied AI, software engineering, cloud, data, experience design, and talent transformation capabilities accelerate innovation for Global 2000 clients. Ascendion is headquartered in New More ❯

As the Cyber Security Engineer, you’ll help define and implement security best practices, proactively identify risks in AI/ML pipelines, and work closely with DevOps and AI engineering teams to embed security at every layer. 🎯 What They’re Looking For: ✔ Proven experience as a Cyber Security Engineer or in a similar security-focused role ✔ Strong understanding of … AWS/GCP preferred), IAM , SIEM , and threat modelling ✔ Knowledge of secure coding practices , container security (Docker/Kubernetes), and infrastructure as code ✔ Ability to collaborate cross-functionally with software engineers, ML researchers, and product teams ✔ Relevant certifications are a bonus – think CISSP, GSEC, OSCP, or GCP/AWS Security certs 🚀 Why This Role? Join a growing AI company … backed by leading VCs Shape and influence the cyber security roadmap from the ground up Work alongside brilliant minds in AI and software engineering Flexible working, great benefits, and a genuinely innovative culture More ❯

leading proprietary trading firm that’s expanding its global footprint and looking to hire exceptional C++ Engineers in London. This is a rare opportunity to join a world-class engineering team and play a key role in building and optimizing ultra-low-latency trading systems across global markets. Based in London, you’ll work at the intersection of software engineering, trading infrastructure, and market expansion. You’ll take ownership of extending the firm’s reach into new markets while refining and optimizing systems in those already traded. This is a high-impact role with direct influence on the firm’s trading performance from day one. What you will do: Design, build, and optimize high-performance trading infrastructure … for new and existing markets Work closely with algorithmic trading and operations teams to support global market expansion Solve complex, time-critical engineering challenges to improve system speed, stability, and efficiency Gain direct exposure to both the technical and business sides of global trading Operate with significant autonomy on projects critical to real-time market access and strategy execution More ❯

with a global reach. This is a 12 month fixed term contract paying up to 90K depending on experience. We are looking for someone that can design and implement software solutions focussing on Analytics and Payment systems. The ideal candidate will have a strong background in software architecture, with expertise in integrating analytics platforms and payment gateway s. … Experience in the Over-The-Top (OTT) media streaming industry is advantageous but not essential. Responsibilities: System Architecture Design: Develop and oversee the technical architecture for software solutions, ensuring alignment with business objectives and scalability requirements. Integration of Analytics and Payment Systems: Design and implement robust integrations with analytics platforms and payment gateways to enhance data-driven decision-making. … Technical Leadership: Provide guidance and mentorship to development teams, ensuring adherence to best practices in software architecture and engineering Stakeholder Collaboration: Work closely with product managers, business analysts, and other stakeholders to gather requirements and translate them into technical specifications. Performance Optimization: Monitor system performance and implement improvements to ensure high availability, reliability, and efficiency of software More ❯

Bank of London is looking for a Chief Architect to create solutions to our biggest challenges and provide direction to our engineering teams. This is an individual contributor role reporting directly to and working closely with the Chief Technology Officer. Our technology organisation has approximately 30 colleagues, plus a number of third party suppliers, and whilst leadership is expected … be a good step towards a CTO role in the future. We are a small dynamic company where architecture work has been until now been carried out by the Engineering teams, but given the significant investments in new business capability that are planned, this new role has been created to provide the required capacity to shape major initiatives and … provide designs for both internal and third party engineering teams to consume. The role will be based in our London office near Bank, but may involve occasional travel to Belfast and Vilnius, our other strategic locations. Critical areas of experience are banking domain knowledge, specifically around payments, core banking, and channels. Technical experience is also expected, and the successful More ❯

and business goals that are essential to the success of Flux. Collaboration: Partner closely with hardware engineers to align compiler, runtime, and debugger requirements with the OTPU design; ensure software and hardware are designed together to deliver maximum performance. Architect & Build: Design and implement our compiler, runtime, and debugger for PyTorch, TensorFlow, JAX, and MXNet on custom hardware. Optimize … advanced techniques (layout, fusion, scheduling, tiling) to eliminate bottlenecks and maximize throughput. Mentor & Define Standards: Lead code reviews, coach peers, and define best practices in ML backend and performance engineering for your team. Guide Technology Direction: Stay ahead of GPU, AI accelerator, and optical computing trends; propose and prototype innovations. Skills & Experience 7+ years of experience in software engineering with a focus on C/C++ programming. Extensive experience in ML framework internals, compilers, low-level programming, and optimisation techniques. Extensive experience optimising Tensorflow, PyTorch or JAX deep learning models. Extensive experience with multiple toolchains like LLVM, OpenXLA/XLA, MLIR, TVM. Practical experience applying machine learning in high-performance computing contexts. Strong problem-solving skills More ❯

working from our office in Soho, at least 3 days a week. We exist to give engineers superpowers. Our mission is to vastly accelerate hardware invention by building critical software infrastructure that accelerates foundational engineering processes. Our product, is a collaboration platform that helps teams to bring products to market faster by seamlessly integrating and synchronising their engineering models. 👩‍💻 About Engineering at Flow We care deeply about our users, their pains, and their experience We’re a small team of generalists, constantly picking up new challenges We’re united by our passion for our mission, deep focus and fast execution We deploy to production multiple times a day (including Fridays!) 👷‍♂️ What you’ll do Talk to … If/when you don’t, you’re not afraid to say so - others probably don’t either Good communicator - clear, concise, courteous. 2+ year(s) experience as a Software engineer 💡 How we think How to Build an MVP (Michael Seibel) Code-first vs Product-first (Zach Lloyd) Simple Made Easy (Rich Hickey) (First 25mins) 🖥️ Our Tech Stack Golang More ❯

We’re supporting a leading consultancy at the forefront of digital transformation, data intelligence, and national security. With a global footprint and deep expertise in cyber, cloud, and systems engineering, they work across defence, government, and commercial sectors to unlock secure digital advantage. They’re currently seeking an AWS Solutions Architect to lead and shape cloud adoption journeys for … cloud-native architectures and secure migration strategies within complex multi-account AWS estates. You’ll take a technical leadership role—setting cloud standards, shaping reusable migration patterns, and guiding engineering teams to ensure delivery excellence through automation and DevOps best practices. This is a high-impact role, contributing to major cloud transformations that support national security and mission-critical … services. Key Responsibilities: • Lead AWS cloud migration and enablement initiatives. • Define cloud architecture roadmaps, reference patterns, and standards. • Drive automation and infrastructure-as-code adoption across teams. • Collaborate with engineering teams to deliver repeatable, secure AWS solutions. • Support architectural reviews and continuous optimisation of the AWS estate. • Act as a technical escalation point for migration and deployment issues. What 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. … 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 ❯

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 ❯

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 ❯

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 ❯