476 to 500 of 750 Software Engineering Jobs in the City of London

Java Software Engineer - Java, Python, AWS, MySQL, NoSql, REST APIs, Microservices, Machine Learning, Artificial intelligence (Hybrid - 3 days a week in the office - Notting Hill) Description for the Java Software Engineer role:- You will be joining a fast-growing, research-driven company building an artificial intelligence using novel machine learning techniques. My client is revolutionising their industry with … a track record of building things that others have ruled out as impossible. The Java Software engineer will join a very bright, talented team of engineers with the guidance of technologists who have help build up some of the best known technology companies today. You will have a great opportunity to work with a variety of languages, frameworks and … tools. Applicants will need a background in Java and/or Python with a focus on Server side technologies. Core skills for the Java Software Engineer: 5yrs in a commercial Development role Solid experience of Java Good knowledge of Cloud Technologies (AWS) and Microservices Strong database knowledge (SQL and NoSQL) Degree in Computer Science, Engineering, or a related More ❯

Java Software Engineer - Java, Python, AWS, MySQL, NoSql, REST APIs, Microservices, Machine Learning, Artificial intelligence (Hybrid - 3 days a week in the office - Notting Hill) Description for the Java Software Engineer role:- You will be joining a fast-growing, research-driven company building an artificial intelligence using novel machine learning techniques. My client is revolutionising their industry with … a track record of building things that others have ruled out as impossible. The Java Software engineer will join a very bright, talented team of engineers with the guidance of technologists who have help build up some of the best known technology companies today. You will have a great opportunity to work with a variety of languages, frameworks and … tools. Applicants will need a background in Java and/or Python with a focus on Server side technologies. Core skills for the Java Software Engineer: 5yrs in a commercial Development role Solid experience of Java Good knowledge of Cloud Technologies (AWS) and Microservices Strong database knowledge (SQL and NoSQL) Degree in Computer Science, Engineering, or a related More ❯

Senior Software Engineer - London - £120k Please note - this role will require you to work from the London based office three days per week. You must have the unrestricted right to work in the UK to be eligible for this role - this organisation is not able to offer sponsorship. Are you passionate about building cutting-edge technology solutions that power More ❯

Full Stack AI Software Engineer - Full Remote UK - £90,000 + Equity *APPLICANTS MUST BE BASED IN THE UK AND HAVE FULL RIGHT TO WORK* This role requires a software engineer with experience in implementing RAG pipelines and Vector Search (and hybrid AI searches, preferably). The client I am working with are an AI focused start-up … lengthiness and challenges of deal processes in the past. Their stack spans across back end, front end, data and crucially AI. This is a great opportunity for an entrepreneurial software engineer who wants to play a part in shaping the technical vision of this business and work on their product from an early stage. What you'll work on … React/Next.js . Solid experience with both SQL and NoSQL databases (Postgres, DynamoDB, etc.). Exposure to LLMs, embeddings, and vector search APIs . Strong understanding of data engineering , schema design, ETL, and optimisation. Proficiency with cloud (AWS preferred) and containerised deployments (Docker, ECS). Knowledge of secure coding practices and managing sensitive data. Excellent communication, problem-solving More ❯

Credit & Rates Trading) Location: London Salary: £120K-£140K + up to 25% Bonus + benefits About the Company This global financial technology firm is renowned for combining cutting-edge engineering with a market-leading trading platform that powers electronic trading across Credit and Rates. Their flagship product is used daily by thousands of brokers and traders worldwide and is … New York) to ensure performance, scalability, and resilience in a high-volume, real-time environment. This is a hands-on leadership role where you’ll mentor other engineers, promote engineering excellence, and act as a point of contact for senior stakeholders. Projects You’ll Work On Scaling a real-time trading platform: Handle vast growth in electronic trading volumes … ensuring throughput and ultra-low latency. Resilience & recoverability: Build fault-tolerant services and recovery systems for mission-critical trading operations. Automation & testability: Drive forward engineering practices, embedding automation to ensure reliability and speed of deployment. Cross-market solutions: Exposure to multiple asset classes, building technology that underpins Credit, Rates, and wider electronic markets. Global impact engineering: Collaborate with More ❯

Credit & Rates Trading) Location: London Salary: £120K-£140K + up to 25% Bonus + benefits About the Company This global financial technology firm is renowned for combining cutting-edge engineering with a market-leading trading platform that powers electronic trading across Credit and Rates. Their flagship product is used daily by thousands of brokers and traders worldwide and is … New York) to ensure performance, scalability, and resilience in a high-volume, real-time environment. This is a hands-on leadership role where you’ll mentor other engineers, promote engineering excellence, and act as a point of contact for senior stakeholders. Projects You’ll Work On Scaling a real-time trading platform: Handle vast growth in electronic trading volumes … ensuring throughput and ultra-low latency. Resilience & recoverability: Build fault-tolerant services and recovery systems for mission-critical trading operations. Automation & testability: Drive forward engineering practices, embedding automation to ensure reliability and speed of deployment. Cross-market solutions: Exposure to multiple asset classes, building technology that underpins Credit, Rates, and wider electronic markets. Global impact engineering: Collaborate with 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 4 days a week … 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 responsibilities include: Improving … 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 have 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 4 days a week … 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 responsibilities include: Improving … 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 have More ❯

Principal 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 scale. The company … stability across the world — all via a modern, 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 … tangible value. Contribute to technical strategy , support platform scalability, and lead by example through code reviews and mentoring. Maintain a user-centred mindset , constantly measuring and iterating on how engineering decisions translate into product value. Technical Environment: Languages & Frameworks : Python, TypeScript, React, Svelte Infrastructure & Tools : AWS, PostgreSQL, Snowflake, CI/CD pipelines Ways of Working : Agile squads, continuous delivery More ❯

Principal 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 scale. The company … stability across the world — all via a modern, 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 … tangible value. Contribute to technical strategy , support platform scalability, and lead by example through code reviews and mentoring. Maintain a user-centred mindset , constantly measuring and iterating on how engineering decisions translate into product value. Technical Environment: Languages & Frameworks : Python, TypeScript, React, Svelte Infrastructure & Tools : AWS, PostgreSQL, Snowflake, CI/CD pipelines Ways of Working : Agile squads, continuous delivery More ❯

Forward Deployed Software Engineer – London Location: London, UK (Hybrid) Salary: £80,000-£100,000 Start Date: Flexible A high-growth technology company is seeking a mission-driven Forward Deployed Software Engineer (FDE) to join its London team. This is a unique opportunity for engineers with strong data and product instincts who want to build impactful solutions that drive … a fast-paced, startup-like environment Hybrid working model The Company This organisation partners with ambitious enterprises and government agencies to solve their most critical challenges. It builds custom software products that integrate enterprise data into operator-focused workflows, enabling transformative outcomes at speed. The company operates more like a product startup than a traditional consultancy - valuing velocity, ingenuity … and grit. The Role As a Forward Deployed Engineer, you’ll work directly with stakeholders to understand their most valuable challenges and build operationalised software solutions that drive measurable impact. You’ll be embedded with clients, iterating quickly, and delivering end-to-end applications that reshape how organisations operate. This is a hands-on engineering role with a More ❯

Forward Deployed Software Engineer – London Location: London, UK (Hybrid) Salary: £80,000-£100,000 Start Date: Flexible A high-growth technology company is seeking a mission-driven Forward Deployed Software Engineer (FDE) to join its London team. This is a unique opportunity for engineers with strong data and product instincts who want to build impactful solutions that drive … a fast-paced, startup-like environment Hybrid working model The Company This organisation partners with ambitious enterprises and government agencies to solve their most critical challenges. It builds custom software products that integrate enterprise data into operator-focused workflows, enabling transformative outcomes at speed. The company operates more like a product startup than a traditional consultancy - valuing velocity, ingenuity … and grit. The Role As a Forward Deployed Engineer, you’ll work directly with stakeholders to understand their most valuable challenges and build operationalised software solutions that drive measurable impact. You’ll be embedded with clients, iterating quickly, and delivering end-to-end applications that reshape how organisations operate. This is a hands-on engineering role with a More ❯

firm are renowned for a healthy, supportive, and collegiate working environment and culture, with no siloes, boasting an industry-leading staff tenure. You will join a 5-strong Data Engineering team in a Senior Individual Contributor capacity, working directly with Quant Researchers, Portfolio Managers and Traders, and designing and engineering the ingestion, storage, transformation and distribution of tick More ❯

firm are renowned for a healthy, supportive, and collegiate working environment and culture, with no siloes, boasting an industry-leading staff tenure. You will join a 5-strong Data Engineering team in a Senior Individual Contributor capacity, working directly with Quant Researchers, Portfolio Managers and Traders, and designing and engineering the ingestion, storage, transformation and distribution of tick More ❯

Experis Software Engineer Perm Salary DOE London, Bristol (Hybrid) **DV or SC Clearance Essential** Our client, a rapidly growing deep-tech consultancy, urgently require an experienced Software Engineer to join their team on a permanent basis. In order to be successful, you will have the following experience: Experienced Software Developer/Engineer Strong background within Python, C++ … C#, SQL, TypeScript Experience of Palantir technology is a bonus DV or SC Clearance is essential Within this role, you will be responsible for: Delivering strategic advisory, engineering delivery, and enablement services to Government and commercial clients. Solve user problems by drawing source and captured data into a single foundational data model and building operational workflows that materially change More ❯

Senior Java Engineer – Product Engineering | B2B SaaS | Insurtech Up to £120,000 per annum plus bonus and excellent pension London – 2 days a week Java | Spring Boot | AWS | Kubernetes | Event-Driven Architecture Senior Java Engineer – We have been exclusively engaged by a leading B2B SaaS technology business to find a Senior Java Engineer with a “product engineering” mindset … that deliver tangible business value. Working closely with Product and the business, you will be leading technical initiatives, and mentoring colleagues, while also helping to shape the organisation’s engineering culture. This is an opportunity for an engineer who sees software development as a means to solve meaningful problems, not just to write code. The role requires someone … by the opportunity to build modern, scalable systems that make a real-world impact. Please reply with your CV or call Simon for a chat. Senior Java Engineer – Product Engineering | B2B SaaS | Insurtech Up to £120,000 per annum plus bonus and excellent pension London – 2 days a week Java | Spring Boot | AWS | Kubernetes | Event-Driven Architecture More ❯

Software Engineer Key Technologies: C#, SQL, React, Bloomberg, Fidessa, FactSet APIs London Perm Role | 4 Days Onsite £55,000 - £65,000 Harrington Starr has partnered with a well-established London based Investment Bank to find a Full Stack Developer at the Associate level. This is a hands-on development role, supporting a range of internal systems across trading and … business operations. Key Responsibilities: Develop and maintain software using C#, SQL, and React Integrate real-time and historical data from third-party APIs Follow agile sprint plans and deliver reliable, secure solutions Ensure systems meet regulatory and cybersecurity standards Key Benefits: Salary up to £65,000 depending on experience 4 days onsite in a central London office Exposure to More ❯

Software Engineer Key Technologies: C#, SQL, React, Bloomberg, Fidessa, FactSet APIs London Perm Role | 4 Days Onsite £55,000 - £65,000 Harrington Starr has partnered with a well-established London based Investment Bank to find a Full Stack Developer at the Associate level. This is a hands-on development role, supporting a range of internal systems across trading and … business operations. Key Responsibilities: Develop and maintain software using C#, SQL, and React Integrate real-time and historical data from third-party APIs Follow agile sprint plans and deliver reliable, secure solutions Ensure systems meet regulatory and cybersecurity standards Key Benefits: Salary up to £65,000 depending on experience 4 days onsite in a central London office Exposure to More ❯

Remain fully hands-on and write high-quality, production-ready code that enables smooth deployment of solutions Drive architectural and design decisions, ensuring scalable, resilient systems built on sound engineering principles and best practices Partner with clients to define and evolve their technology and data strategy, modernizing infrastructure, architecture, and technology stacks Utilize DevOps tools and practices to automate … deliver robust, production-level AI and Machine Learning systems Develop frameworks and tools for efficient data ingestion from diverse and complex sources Operate in short, iterative sprints, delivering working software aligned with clear deliverables and client-defined deadlines Demonstrate flexibility by learning and working across multiple programming languages and technologies as required Additional Responsibilities: Actively contribute to a high … performing engineering culture by working from ours or client offices regularly to collaborate closely with fellow senior techies, fostering strong technical discussions and decision-making Provide hands-on mentorship and technical guidance that encourages knowledge sharing, continuous improvement, and innovation within your team Skills you’ll need: Demonstrated experience as a Principal or Lead Software Engineer Experience in More ❯

Remain fully hands-on and write high-quality, production-ready code that enables smooth deployment of solutions Drive architectural and design decisions, ensuring scalable, resilient systems built on sound engineering principles and best practices Partner with clients to define and evolve their technology and data strategy, modernizing infrastructure, architecture, and technology stacks Utilize DevOps tools and practices to automate … deliver robust, production-level AI and Machine Learning systems Develop frameworks and tools for efficient data ingestion from diverse and complex sources Operate in short, iterative sprints, delivering working software aligned with clear deliverables and client-defined deadlines Demonstrate flexibility by learning and working across multiple programming languages and technologies as required Additional Responsibilities: Actively contribute to a high … performing engineering culture by working from ours or client offices regularly to collaborate closely with fellow senior techies, fostering strong technical discussions and decision-making Provide hands-on mentorship and technical guidance that encourages knowledge sharing, continuous improvement, and innovation within your team Skills you’ll need: Demonstrated experience as a Principal or Lead Software Engineer Experience in More ❯

Senior Software Engineer to help lead the technical evolution of this critical platform. The Opportunity You’ll join a growing team building scalable, secure systems using React , Python , and AWS , helping to drive our mission to cut the impact of flooding in half.This is more than just building products — it’s about delivering real-world impact through technology. What … demand Lead technical projects with high business impact, from concept to delivery Collaborate cross-functionally with Product, Data Science, and Operations teams Mentor developers, promote best practices, and improve engineering workflows Shape technical strategy and contribute to long-term system improvements Drive code quality, observability, and resiliency across services Tech Stack Frontend : React, JavaScript/TypeScript Backend : Python (FastAPI More ❯

which you can use to make soime weeks 2 days a week from home. Please also note - sponsorship is not an option here unfortunately. The role As a Senior Software Engineer, you will: Understand complex business problems then propose and implement technical solutions Have input into the architecture, working closely with the Head of Technology and other senior team … members Work with other engineers and the business to improve user experiences Bring your experience and enthusiasm to our engineering culture Promote excellence with technical mentoring, feedback, and code reviews Participate in planning sessions, retrospectives, stand-ups and demos Join us in curating a codebase to be proud of, driving for quality, maintainability and testability The candidate You have More ❯

which you can use to make soime weeks 2 days a week from home. Please also note - sponsorship is not an option here unfortunately. The role As a Senior Software Engineer, you will: Understand complex business problems then propose and implement technical solutions Have input into the architecture, working closely with the Head of Technology and other senior team … members Work with other engineers and the business to improve user experiences Bring your experience and enthusiasm to our engineering culture Promote excellence with technical mentoring, feedback, and code reviews Participate in planning sessions, retrospectives, stand-ups and demos Join us in curating a codebase to be proud of, driving for quality, maintainability and testability The candidate You have More ❯

science, algorithmic precision, and intuitive design, we develop cutting-edge tools that enable users to analyze, interpret, and act on market dynamics with confidence. Your role As a Senior Software Engineer in the Product Engineering team you will build and evolve a data and content dissemination platform (Web, App, APIs, messaging) and corresponding data pipelines, ensuring that our … direct contact with business and technical stakeholders Work with product management to analyze and improve our business processes Conduct workload and complexity assessments Design, plan and implement new efficient software solutions in Python and Go Maintain and enhance our Airflow data pipelines Improve observability and scalability to support our constantly growing client base Continuously adapt to changing requirements in … Build and extend knowledge of financial instruments Minimum qualifications B.Sc. in Computer Science or similar field involving coding (e.g. physics or applied mathematics) Algorithms, data structures, complexity analysis and software design Hands-on senior level experience in Python programming Unix based systems, containerized environments and Kubernetes Working experience with databases: relational, NoSQL and time series Websocket, REST API and More ❯

Senior C# Developer/Software Engineer (C# .Net) London onsite to £150k Opportunity to progress your career in a senior, hands-on C# Developer role at a global Asset Manager with c$3 million under management. As a Senior C# Developer within the trading engine team you'll collaborate to design and develop real-time trading systems, you'll … 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 C# Developer/Software Engineer 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 C# Developer/Software Engineer (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 all walks of life and will More ❯