51 to 75 of 78 Java Jobs in the City of London

deeply about the end user experience, possess a strong desire to learn, and feel comfortable with at least one statically compiled language (C#, C++, Java, Swift, Rust etc). Technical Diligence - You value version control and code review, you are architecturally curious, you maintain documentation. You advocate for your ideas ...

Contract Senior Software Engineer (Java or Python) | Inside IR35 Contract length: 6 months (with potential to extend) Location: London Working Environment: On-site You will be joining a private equity firm as a senior software engineer, to work across the following responsibilities: Develop and support P&L, accounting, and returns … production-grade code Provide production support, working with Platform and SRE teams as needed Key Requirements: Technical: 8+ years commercial experience in Python or Java across the full development lifecycle 5+ years in financial services (buy-side strongly preferred) Solid relational database skills; MS SQL Server a strong plus Snowflake ...

Looking to join a company when you can make a real impact? Do you have 3+ years commercial experience developing software with Java & JavaScript? 🚀 Full Stack Engineer – SaaS Solutions 🚀 💰 Salary – up to £55k + bonus 📍 Location – hybrid working 2 days a week in modern London office I am excited … Defense, HM Treasury, and the Departments of Work & Pensions and International Trade. They are looking for a motivated Full Stack Engineer with experience with: Java Spring Boot Microservices JavaScript Frontend frameworks: they use Vue.js but are also open to React and Angular Containerisation using Docker, Kubernetes Developing cloud-native applications ...

will collaborate in a dynamic global team with fellow technologists, business analysts, project managers and business stakeholders across multiple locations. Key Attributes An excellent Java developer with good software design principles and the ability to write robust code and accompanying test suites Ability to write efficient, clear code … developer is a plus Technical skills: 5+ years hands on development with investment banking. E-trading- FX/FI experience is must Core Java (essential), Concurrency, Spring RX Java is a plus Experience in micro-services and container technologies (preferably Docker) is a plus Familiarity with CI/ ...

Senior Full Stack Engineer (Java/Python) Contract Length - 6 months Location - London (2 days onsite) We are hiring a Senior Full Stack Engineer for a high-priority, ASAP-start contract role with a leading UK tech platform. This is a hands-on senior engineering position within an established team … contributor working across backend and frontend systems, helping shape technical direction and confidently engaging with stakeholders to influence engineering decisions. The core stack is Java-first, with increasing importance on Python-based services (including orchestration, agents, and modern AI/LLM integrations), alongside a strong React frontend. This ...

Contract Technical Lead (Java/Angular 6) £440 p/d Inside IR35 London (2 days a week) We are seeking an experienced and forward-thinking Technical Lead to join our growing technology team. This is an exciting opportunity for a highly skilled technologist with a passion for modern engineering … role in designing, developing, and delivering scalable enterprise solutions while collaborating closely with cross-functional teams across the full software development lifecycle. Technical Skills Java Angular 6 Microservices and API development REST API integration (OpenAPI preferred) Event-driven architecture Hands-on cloud experience across AWS and Azure, including serverless deployments ...

Senior Java Engineer/SRE London (Hybrid) The company A well-established global fintech business operating large-scale trading platforms across multiple asset classes including equities, leveraged products, futures, options, and digital assets. Their technology supports a significant international client base and processes high volumes of real-time trading activity … incident reviews Improve event-driven and messaging systems for resilience and throughput Drive infrastructure automation and engineering best practices What you will need Strong Java development experience in production environments Good understanding of JVM performance tuning and backend optimisation Experience with distributed systems and troubleshooting at scale Hands-on knowledge ...

Latency Java Engineer London | Hybrid Electronic Trading/Distributed Systems/FinTech A leading global trading technology business is looking to hire a Low Latency Java Engineer to join a high-performing Core Trading team building the systems at the heart of a large-scale electronic trading platform. This … Work closely with engineers and stakeholders to deliver trading functionality at scale • Contribute to architecture, performance engineering, and continuous improvement initiatives Requirements: • Strong core Java engineering background • Experience building distributed, low-latency, or high-throughput systems • Strong understanding of concurrency, system design, and backend architecture • Experience with performance testing ...

software development experience of designing and coding on enterprise web-based systems. Experience on Objected Oriented Design, Data modelling skills using UML. Experience with Java 8+; J2EE and Gradle/Maven. Experience with Spring (Boot, Security) and other Java frameworks. Experience with BPM tools such as Camunda (preferred), jBPM, Activiti ...

ideas, challenge existing approaches, and help define the long-term technical vision of the platform. The technology is truly bleeding-edge, including the likes Java 25, Kotlin, AWS, Kubernetes and everyone has full access to Claude 4.3. This is an unbelievably highly funded initiative, where they’re looking for engineers … influence technical direction from day one - from architecture and strategy through to development, deployment and testing. Required: 5+ years of Java or Kotlin development experience in an enterprise environment. Strong Computer Science, Engineering (or a related subject) background. Cloud-Native engineering experience. Able to work in a modern software engineering ...

Locations: London (must be willing to travel to client sites throughout the UK on an ad hoc basis) Level: Manager Please Note: Any offer of employment is subject to satisfactory BPSS and SC security clearance ...

writing. Evolve the tech stack by integrating modern technologies and patterns. What They’re Looking For Essential Proficiency in JVM-based languages, specifically Java or Kotlin. Deep experience with cloud-native architecture and multi-cloud environments. A pragmatic, iterative approach to solving complex technical challenges. Strong architectural thinking with ...

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 10.0, C#, J2EE, Agile, TDD, BDD, Graduate/Junior Developer) Since 2006 our client's revolutionary marketing software platform has been helping businesses all over the world to attract, engage … experiences that are relevant, helpful, and personalized. Having recently launched in the UK, they looking to hire Graduate/Junior Developer (Python, Linux, C#, Java)) to become a part of their ever-growing family. They believe that individual developers are in the best position to make decisions about what should ...

Role: Software Engineer (Java) – Up to £120,000 + Bonus + Package Salary: Up to £120,000 + Bonus + Package Location: London (Hybrid Working) Skills: Java as a main language This firm is an elite fintech company with exceptionally high standards, renowned for building cutting-edge financial systems ...

exciting opportunity for a Java Software Engineer has arisen with a leading semiconductor company specialising in high-performance mixed-signal processing, based in London. This is an exciting opportunity for a Java Software Engineer to design and evolve cross-platform applications, SDKs, and developer tooling. You’ll work closely with … will commit to a hybrid working model, with a minimum of one day per week onsite in the London office. Experience for the Java Software Engineer includes: 1+ years of experience with desktop application development, ideally with Java UI frameworks e.g. JavaFx, Swing, Qt Object-oriented design and development Multithreaded ...

Engineering — designing models and owning their production implementation. You’ll work across a dual-language stack: Python for research, modelling, and data analysis Java for building high-performance, distributed pricing systems This role is deeply embedded in the trading lifecycle, with direct impact on: Client pricing optimisation Flow analysis Automated … hedging strategies ⚙️ What You’ll Be Doing Design and implement quantitative pricing and hedging models within a high-performance Java framework Partner closely with Quant Researchers to develop alpha signals and pricing logic Work with large-scale datasets to optimise spreads and pricing strategies Build and deploy systems across multi ...

platform. While having essential responsibility for both building and maintaining backend services across the board. What You'll Be Doing Designing and implementing scalable Java backend services for sports data ingestion and processing Maintaining and improving data pipelines that enrich and distribute sports data across internal platforms Ensuring reliability, scalability … resolving production incidents related to data feeds and pipelines Contributing to code reviews and engineering best practices What We're Looking For Strong Java experience and solid software engineering fundamentals Experience with ElasticSearch, Redis, and SQL/NoSQL databases Kubernetes deployment and cloud platforms (GCP or equivalent) Network routing experience ...

design documentation and oversee quality of other technical consultants' outputs. Skills Endur Development: Considerable experience in developing and customizing JVS and/or OpenComponents (Java or .NET C#) to extend Endur functionality. Connex Integration: Expertise in integrating Endur with external systems and data sources using Connex, ensuring seamless data exchange … Database Management: Strong understanding of Oracle and MS SQL Server databases, including database design, administration, optimisation, and performance tuning. .NET C# and/or Java Development: Proficiency in .NET C# and Java development for building custom applications, modules, and integrations within the Endur ecosystem. Endur Gateways and Accelerators: Demonstrate ...

Senior Software Engineer | Java | AI | London | £500-£600/day About the Role We are seeking an exceptional Senior Software Engineer with expertise in Java and AI to join our client, an established financial services brand, on a 6-month contract Outside IR35. This is a unique opportunity … lifecycle, working with the latest AI technologies including Claude Code, GitHub Copilot, MCP, LLMs. Senior Software Engineer will: Develop and maintain software applications using Java Implement AI solutions to enhance software functionality and accelerate development workflows Collaborate with cross-functional teams to define, design, and ship new features Leverage ...

Java Developer Crypto Exchange Connectivity (Low Latency) Location: Home Based/1-2 days per month in London Salary: Circa £180,000 £200,000 + bonus + benefits Java Developer required for a small trading technology firm focused on crypto markets, working directly on exchange connectivity and low latency trading ...

Java/Microservices/API design/LLMs/AI/Claude Code/Copilot Role: Senior Software Engineer Company: Financial Services Location: London - Hybrid 3 days per week Salary: up to £120,000 Join a Service Modernisation team driving AI-first software development in financial services. This … hands-on role modernising high-impact legacy services while building AI-powered engineering workflows. What You'll Do Modernise critical legacy Java services using AI-driven analysis and refactoring Apply migration patterns (e.g. strangler fig) to deliver clean, modern APIs Ship improvements in fast cycles with measurable gains in performance ...

oriented modelling in Python with production engineering in Java. You will use Python to analyse data, test ideas and support model development, while using Java to build and enhance high-performance pricing infrastructure used in a live, global trading environment. You will be involved in the development of pricing logic … pricing problems at scale. KEY RESPONSIBILITIES: Quant Developer OTC Pricing Build and enhance quantitative pricing, hedging and optimisation models within a high-performance Java framework Work alongside quantitative researchers to analyse large datasets and translate research into production-ready solutions Use Python for model prototyping, data analysis, signal investigation ...

computer vision, and LLMs, to optimize document processing, data extraction, and decision-making workflows Programming and Development : Apply relevant programming skills (e.g., Python, Java, or .NET) to support solution development and customization within TotalAgility Technology Innovation : Identify opportunities to integrate emerging technologies into client solutions, driving innovation and competitive advantage … with cloud architecture and deployments, including designing scalable and secure cloud-based solutions Core Competencies Technical Skills Proficiency in relevant programming languages (e.g., Python, Java, .NET) to support solution development Experience with cloud architecture and deployments Understanding of enterprise security practices and compliance frameworks Knowledge of AI/ML model ...

Role: Software Engineer (Full Stack) Locations: London (must be willing to travel to client sites throughout the UK on an ad hoc basis) Accenture is a leading global professional services company, providing a broad range ...

cutting-edge technologies within the realm of e-trading and capital markets. As a leader in our field, we are seeking an experienced Senior Java Developer with a strong foundation in low latency programming to join our team. Location: London Role and Responsibilities: Utilize your extensive expertise in Low Latency … Java programming to develop high-performance solutions for e-trading within Front Office/Capital Markets. Demonstrate a deep understanding of at least one key asset class in Capital Markets, such as Rates, Credit, FX, Equities. Conduct JVM tuning and Garbage Collector tuning to optimize system performance. Provide hands ...