51 to 75 of 82 Java Jobs in the City of London

well as very competitive salaries, our client offers an excellent working environment. Skills required: Proficient in several of the following: Python, C#, C++, Java Mathematical Modelling Mathematical skills, particularly a keen understanding of probabilities and statistics Analytic mindset Strong communication skills Accuracy and attention to detail Experience in data science ...

Weeks with FlowX.AI - Hands-on experience with the Flow X platform - Extensive experience of similar workflow/low-code tools - Basic programming skills - Java, JavaScript, Python, Groovy - Experience in BPMN development - Good understanding of API testing - REST and SOAP or knowledge of integration protocols (REST - JSON, SOAP - XML) - Experience working ...

solutions that integrate with a range of legacy and modern systems. Proficiency with programming and scripting languages such as JavaScript, SQL, Java, C#, or similar. Skilled at simplifying complex technical concepts for non‐technical audiences and influencing decision‐making. Minimum five years’ experience in a technical architect role, including security ...

Java Software Engineer with around 3-6 years professional, post-graduate experience sought by one of the original Quantitative Hedge Funds, with a 20+ year track-record. The firm are renowned for a healthy, supportive, and collegiate working environment and culture, with no siloes, boasting an industry-leading staff tenure. … Corporate Functions. The team deal directly with business users right across the firm, taking ownership of analysis, design, architecture, and implementation, working primarily with Java, but also with Python, SQL and to a lesser extent, MATLAB. They currently have an opening for a mid-level hire in the team, with ...

This is not a bank. Not a consultancy. Not sell‐side tech. We’re hiring a Java Engineer to join a small, elite engineering team inside a buyside FX trading firm building proprietary systems that directly trade capital. Your code won’t feed dashboards or client portals — it will … fluff. This is backend + infrastructure engineering in a production trading environment. Who This Is For We’re looking for a junior–mid level Java engineer who can: Pick up tickets independently Write clean, production‐ready code Deliver without constant oversight This is not a senior or architectural role ...

product innovation are deeply embedded. You will bring the standards, pace, and technical judgement shaped in those environments, along with deep technical credibility across Java and .NET ecosystems, and the ability to guide architectural decisions without needing to be hands-on in every detail. This is also a visible leadership ...

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 ...

Senior Solution Architect | Java-based ecosystem Location: London Salary: £95,000 - £120,000 This is a high-impact architecture role within a fast-moving SaaS environment, where you will help design and evolve scalable, secure, and highly available systems across multiple products. You will work closely with product managers … available products and understand different types of architecture Solid experience with cloud platforms (AWS or GCP), and databases (SQL, NoSQL) Hands-on experience with Java, APIs, streaming, messaging, queue-based systems, Kubernetes and IaC Understanding of security by design and familiarity with compliance frameworks and regulatory requirements Any experience ...

will be required to produce robust, clear and polished code to tight time-scales. This is an excellent opportunity for a highly-motivated Java developer to be involved in the delivery of new customer products and/or customer roadmaps. The candidate will be a key member of an agile … deliver betting opportunities and odds via an automated platform. You will be involved in: Proposing and implementing technical solutions by developing and maintaining Java-based components and interfaces. Defining technical objectives by analysing user requirements and proposing system features and functionality. Determining design methodologies and tool sets; completing programming using ...

ALERT 🚨 – Lead Java Contractor 💻 Java/Distributed Systems/Event-Driven Architecture – Trading & Portfolio Tech 🕑 10+ years building high-performance, data-intensive trading systems 📍London (front-office, high-impact engineering environment) 💰 Highly competitive day rate Highlights: 🔷 Lead the design and build of scalable trading & portfolio management systems for the Credit … senior investment stakeholders. What You’ll Be Doing: 🔹 Own the full development lifecycle – from architecture and design through to production delivery 🔹 Build and scale Java-based systems supporting trading, analytics, and execution workflows 🔹 Design high-throughput, event-driven platforms using modern streaming technologies 🔹 Partner with traders and PMs to translate ...

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 ...

Software Engineer/Developer (Java Kafka API) London/WFH to £90k Are you a Java technologist seeking a role where you can work on ground breaking technology, continually learning and progressing your career? You could be joining a global technology consultancy. What's in it for you: Salary ...

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 ...

create meaningful outcomes for both customers and the wider business. What You’ll Be Doing Building and maintaining scalable, production-grade backend systems using Java or Kotlin Developing high-quality, maintainable code across a modern cloud-based architecture Collaborating with product and business stakeholders to turn commercial goals into clear … assisted engineering workflows, where they add meaningful value Requirements 4+ years’ experience as a Software Engineer or Backend Engineer Strong backend development experience with Java or Kotlin Solid understanding of frontend technologies such as React and experience supporting production-grade user-facing applications Experience working with databases such as PostgreSQL ...

develop performance test frameworks using Jmeter and Load runner. Strong knowledge of performance testing methodologies and tools Familiarity with programming languages and scripting (e.g., Java, Python, Shell) Ability to own QA deliveries including test planning, estimation, reporting, managing start to end test life cycle with the ongoing development sprints. Experience … tools Experience with Performance monitoring and analysis Experience in using Load testing tools (e.g., JMeter, LoadRunner) Knowledge on Programming languages and scripting (e.g., Java, Python, Shell) Ability to develop performance testing frameworks using the performance testing tools. Ability to auto deploy, distribute and execute the performance testing frameworks using ...

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 ...

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 ...

platform selection, and long-term scalability planning. Engineering Delivery : Own end-to-end software delivery across all product lines and platforms, including hands-on Java development. Establish and continuously improve engineering processes, CI/CD pipelines, and quality standards. Offshore Team Management : Lead, manage, and grow a distributed offshore development … absence, representing the technology function at the executive level. Lead cross-functional technology governance, security, and compliance initiatives. Required Skills & Qualifications: 10+ years in Java software development, with at least 5 years in leadership roles. Proven track record managing offshore/distributed teams. Strong background in full-stack or platform ...

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 ...

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 ...

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 ...