1 to 25 of 62 Java Jobs in the City of London

About the Role: We are seeking an experienced and visionary Technical Lead with deep expertise in Java Spring Boot, microservices architecture, and solution design to lead the backend engineering efforts of our enterprise platforms. This role requires strong architectural acumen, hands-on coding capability, and a leadership mindset to guide teams across the full software development lifecycle. Exposure to mobile … with engineering managers, architects, mobile teams, and product stakeholders to deliver scalable, secure, and maintainable solutions. Key Responsibilities: • Design and develop scalable, secure, and high-performance backend systems using Java, Spring Boot, and modern architectural practices. • Lead development of RESTful APIs and microservices along with mobile platforms, ensuring consistency and alignment with business and UX goals. • Drive integration with API … computer science, Engineering, or related field. • 10+ years of professional experience in backend development, with at least 3+ years in technical leadership or solution design roles. • Strong expertise in Java, Spring Boot, and the Spring ecosystem (Spring MVC, Data, Security). • Proven experience architecting and deploying microservices-based systems in complex enterprise environments. • Hands-on experience with API Gateways (Kong More ❯

continuous learning and global collaboration, where you can make a meaningful impact through innovative projects that shape the future of technology. Position Summary: We are seeking a Mid-Level Java Software Engineer to join our dynamic Financial Services technology team. In this role, you’ll design, develop, and maintain enterprise-grade financial applications while collaborating with cross-functional teams including … architects, and QA engineers. Ideal candidates are technically strong, detail-oriented, and passionate about delivering reliable software in a regulated industry. Key Responsibilities: Develop, test, and maintain high-quality Java applications for financial services platforms. Collaborate with architects and senior engineers on system design and technical decisions. Integrate third-party APIs, data feeds, and financial market infrastructure. Participate in code … application performance. Contribute to documentation and knowledge sharing within the team. Support production systems and participate in incident response as needed. Required Skills & Experience: 3–5 years of professional Java development experience. Solid understanding of core Java (Java 8+), object-oriented principles, and design patterns. Experience with Spring Framework (Spring Boot, Spring MVC, Spring Data). Familiarity with RESTful APIs More ❯

environments. What You'll Do Design, build, and maintain secure, scalable, cloud-native platforms using modern cloud technologies (AWS, Azure, GCP). Develop and support microservices-based applications using Java, Node.js, and Python. Implement containerised solutions and orchestration frameworks such as Docker and Kubernetes. Collaborate with architects, engineers, and product teams to deliver high-quality features in an agile environment. … 5+ years of experience in software development and cloud engineering. Current working for a consultancy firm. Proven expertise in building and deploying microservices-based applications. Strong coding skills in Java, Node.js, and Python . Hands-on experience with cloud platforms: AWS, Azure, or Google Cloud. Familiarity with RESTful APIs, web services, and cloud-native design patterns. Proficient in containerisation and More ❯

Rest, JSON, SOAPUI) and client development, query invoke. Experience in customizing/extending of ForgeRock CIAM, IDM, AM, DS and LDAP schema. Very good experience on connector Xpress/Java connector server implementation. Extensive Experience in connector development and resource configuration using ForgeRock CIAM SDK. Experience in creating and managing Business Logic using identity policy, policy Xpress, user journey and … or developing J2EE products. Should have the ability to understand customer scenario and requirements (may include integration situations) and be capable of suggesting solutions. Should have good knowledge on JAVA/J2EE, XML Good knowledge on performing performance tests for ForgeRock CIAM, IDM, AM, DS, and its components Excellent communication skills and ability to work with global counterparts. GCP knowledge … to have Knowledge on implementation of LDAP, Active Directory based Authentication. Design Experience, including data modelling, demonstrable experience interpreting requirements and producing design artefacts for implementation by development teams. Java 8 and higher; Spring boot (preferable); RDBMS (Oracle, Postgres) Desired; Micro services; Kubernetes Google Cloud Platform (GCP) or any other cloud GKE Cloud SQL Cloud Functions GCS and Labelling Pub More ❯

Senior Full Stack Developer/Engineer (Java Angular) London/WFH to £90k Are you full stack technologist? You could be progressing your career in a hands-on, impactful, Senior Full Stack Developer role, working on a "tech for good" product that is helping to drive efficiencies for the NHS, the core product is a highly complex real-time shift … or mobile device (iOS/Android). As a Senior Full Stack Developer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby and TypeScript). You'll design and develop scalable backend Java services and REST APIs and build responsive, user friendly interfaces using Angular (v15+) as … London, City based offices 3-4 days a week with some flexibility to work from home 1-2 days. About you: You have strong Full Stack development experience including Java backend (Spring Boot) as well as modern Angular You have experience with relational databases and SQL query writing You have a strong understanding of REST APIs and real-time systems More ❯

for talented developers to join our team and contribute to the success driving innovation and excellence in our network infrastructure. Essential Technical Skills: Front-end: Angular, TypeScript Back-end: Java, Python, Spring Boot Database: MongoDB, PL/SQL,NOSQL API Development: RESTful APIs Version Control: Git CI/CD: TeamCity Desirable Skills: Docker and Containerization Monitoring and Logging (e.g., Prometheus More ❯

Lead Java Developer/Software Engineer (Java Kafka Spring Boot) London/WFH to £120k Are you a skilled Java Developer with strong Java and real-time messaging experience combined with SC Clearance? You could be progressing your career in a senior, hands-on Lead Java Developer position at a scale-up technology company with a successful workforce management solution … used within the government, defence and other public sector clients. As a Lead Java Developer you will take a lead role in designing and developing secure, event driven, distributed backend systems for real-time operations, resilience and extensibility. You'll collaborate with engineers across the full stack to integrate backend services with Identity and Access control frameworks such as Keycloak … can work from home most of the time, meeting up with colleagues in the London office once a week. About you: You have significant experience as a backend focussed Java software engineering with leadership responsibilities You have strong Spring Boot, Kafka and event driven microservices experience with high throughput You have leadership, mentoring and coaching skills You have a strong More ❯

Senior Java Developer/Software Engineer London/WFH to £130k Are you a Java technologist who enjoys building systems from scratch? You could be progressing your career, in a senior, impactful role at a global prime broker that is replacing the legacy infrastructure used across capital markets with a new cloud-native clearing and custody system, designed for today … s complex global markets. The company is experiencing great success and is expanding into the UK. As a Senior Java Developer you will take ownership of building a brand new Equity SWAPS platform for the UK, primarily using Java with a focus on backend development but also with some React UI work. You'll be working on complex and challenging … highly talented and collaborative team in the London, City office three days a week with flexibility to work from home the other two. About you: You have strong backend Java development skills including Spring, Spring Boot, microservices You take in pride in producing clean, high quality code You also have an appreciation of UI development with TypeScript/React You More ❯

/or migration experience. Experience in leading a technical team to drive efficiencies in Guidewire estate with multiple products/LOBs. Desirable skills/knowledge/experience: Programming Languages: Java, Python, Pl/sql Development Frameworks: Spring boot, React, Angular Databases: Oracle/Microsoft sql DevOps: Jenkins, Docker, Kubernetes Agile Methodologies: Kanban ,Scrum Monitoring: App dynamics/Splunk Guidewire Ace More ❯

Senior Java Engineer - Azure Migration (Financial Services) Location: London (Hybrid - 1 day per week onsite) Rate: Up to £650/day (Inside IR35) Start Date: ASAP Engagement: Consultancy - Financial Services Clients Overview A leading consultancy is seeking a Senior Java Engineer for a high-impact Azure migration programme within financial services. This role involves lifting and shifting a suite of … and deploying services in Azure, helping to modernise backend systems while ensuring reliability and performance in a regulated environment. Key Responsibilities Contribute to the lift-and-shift migration of Java-based applications to Azure Migrate and support services including the broker services portal, static data, integration layers, and authentication modules Ensure secure, scalable deployment using Azure cloud-native tools Build … and support systems using PostgreSQL, Java, and Spring Boot Integrate and monitor using observability tools like Datadog and BigPanda Collaborate closely with architects, DevOps, and security teams across the full SDLC Core Skills & Technologies Strong backend development in Java with Spring Boot Cloud migration experience, particularly Azure Lift-and-Shift Familiarity with cloud infrastructure and deployment pipelines Exposure to PostgreSQL More ❯

Java Developer/Backend Software Engineer/Developer WFH to £100k Are you a skilled Java Developer with low latency trading systems experience? You could be progressing your career at a global market data and trading platform provider for cryptocurrency markets. As a Java Developer you will develop, test and maintain high-quality, low-latency Java applications handling millions of … with some flexibility around start/finish times - please note: you must have the right to work in the UK and be UK based. About you: You have strong Java development experience including concurrency, garbage collection, low level performance optimisation, data structures and memory efficient design patterns You have experience with low latency systems, particularly OMS (Order Management Systems), EMS … You have strong design skills and can explain full system workflows and make recommendations for improvements to reduce latency and increase throughput You have experience with Spring framework and Java build tools such as Gradle/Maven You're comfortable working in a Linux environment You are collaborative and pragmatic with excellent communication skills What's in it for you More ❯

Software Engineer/Developer (Full Stack Java Angular SQL API) London/WFH to £90k Are you full stack technologist? You could be progressing your career in a hands-on, impactful, Software Engineer role, working on a "tech for good" product that is helping to drive efficiencies for the NHS, the core product is a highly complex real-time shift … the web or mobile device (iOS/Android). As a Software Engineer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby and TypeScript). You'll design and develop scalable backend Java services and REST APIs and build responsive, user friendly interfaces using Angular (v15+) as … London, City based offices 3-4 days a week with some flexibility to work from home 1-2 days. About you: You have strong Full Stack development experience including Java backend (Spring Boot) as well as modern Angular You have experience with relational databases and SQL query writing You have a strong understanding of REST APIs and real-time systems More ❯

Architect with around 15 years of industry experience to lead the design and development of scalable, robust, and cloud-native systems. The ideal candidate will be an expert in Java , well-versed in modern architectural patterns, and have extensive working knowledge of AWS cloud services . Here's how you'll contribute: You'll do this by: Lead the architecture … systems. Work closely with product and engineering teams to define architecture blueprints and technology roadmaps. Develop high-level and low-level design documents. Be hands-on with coding in Java (latest versions) and guide teams on best practices. Drive adoption of modern architecture principles like Microservices , Event-Driven Architecture , CQRS , and SAGA patterns . Define and enforce coding standards, performance … and security in mind. Conduct design and code reviews to ensure quality and performance. Mentor and guide engineering teams on architectural decisions and technical challenges. Stay updated with new Java features, AWS services, and emerging architectural trends. Core Skills: Required Skills & Qualifications ~15 years of software development experience with at least 5 years in a software architect role. Strong expertise More ❯

operations. You should have extensive experience and skills in Software Engineering, DevOps, project management, incident management, team management and stakeholder management. Additionally, you should have expertise in: Multi-threaded Java backend development API and SQL database development Typescript and Node.js Applications AWS Cloud Native and Serverless Architecture You will collaborate with other stakeholders and manage suppliers to fulfil business requirements … Comfortable managing a mix of direct reports and shared teams Skills & Experiences AWS Technologies (e.g. ECS, DynamoDB, Lambda, Aurora, SQS, SNS, VPC, Private Link, etc.) Multi-threading & Socket Programming: Java + Spring Applications Architectures - Event Sourcing, CQRS, Polyglot Database, Traditional OLTP, OLAP DevOps - Provisioning-based Infrastructure-as-Code, CI/CD QA - Practical TDD, BDD Experiences in payment domains Proven More ❯

Java Software Engineer/Developer WFH to £100k Are you a skilled Java Software Engineer with low latency trading systems experience? You could be progressing your career at a global market data and trading platform provider for cryptocurrency markets. As a Java Software Engineer you will develop, test and maintain high-quality, low-latency Java applications handling millions of requests … with some flexibility around start/finish times - please note: you must have the right to work in the UK and be UK based. About you: You have strong Java development experience including concurrency, garbage collection, low level performance optimisation, data structures and memory efficient design patterns You have experience with low latency systems, particularly OMS (Order Management Systems), EMS … You have strong design skills and can explain full system workflows and make recommendations for improvements to reduce latency and increase throughput You have experience with Spring framework and Java build tools such as Gradle/Maven You're comfortable working in a Linux environment You are collaborative and pragmatic with excellent communication skills What's in it for you More ❯

Backend Software Engineer/Developer (Java Low Latency OMS EMS) WFH to £100k Are you a skilled Backend Software Engineer with strong Java skills and low latency trading systems experience? You could be progressing your career at a global market data and trading platform provider for Cryptocurrency markets. As a Backend Software Engineer you will develop, test and maintain high … quality, low-latency Java applications handling millions of requests per day, collaborating with cross-functional teams to design systems that meet business and regulatory requirements. You'll seek to continuously improve system performance and scalability, implement automated testing, CI/CD pipelines and document system workflows, architecture and design decisions. Location/WFH: You can work from home from anywhere … with some flexibility around start/finish times - please note: you must have the right to work in the UK and be UK based. About you: You have strong Java development experience including concurrency, garbage collection, low level performance optimisation, data structures and memory efficient design patterns You have experience with low latency systems, particularly OMS (Order Management Systems), EMS More ❯

Full Stack Engineer/Developer (Java Angular SQL API) London/WFH to £90k Are you full stack technologist? You could be progressing your career in a hands-on, impactful, Senior Full Stack Developer role, working on a "tech for good" product that is helping to drive efficiencies for the NHS, the core product is a highly complex real-time … web or mobile device (iOS/Android). As a Full Stack Engineer you will play a crucial role in re-architecting and enhancing the scheduling platform to a Java and Angular codebase (from Ruby and TypeScript). You'll design and develop scalable backend Java services and REST APIs and build responsive, user friendly interfaces using Angular (v15+) as … London, City based offices 3-4 days a week with some flexibility to work from home 1-2 days. About you: You have strong Full Stack development experience including Java backend (Spring Boot) as well as modern Angular You have experience with relational databases and SQL query writing You have a strong understanding of REST APIs and real-time systems More ❯

Backend Java Developer ?" City London We are urgently looking to recruit a Java backend Developers with at least 5 years experience. Must have strong Data structures and Algorithms experience. Also experience of Spring, working with large code base, SQL, Unix etc. You should ideally have a solid problem solving and algorithm background coupled with excellent communication skills. This is a More ❯

Graduate/Junior Developer, Python, Linux, C#, Java - London (Teck stack: Graduate/Junior Developer, Python, Linux, C#, Java, .NET 9, 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, and delight customers by delivering inbound 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 be created, and how it should be built. Within their setup those decisions are … roles would be suitable Graduate/Junior Developer who have recently graduated from university and have a basic understanding of any of the following technologies: Python, Linux, C# or Java; which might have been acquired as part of your degree course or through a placement year in industry. At the center of our client's culture is freedom and openness More ❯

currently going through a period of exponential growth and are enjoying record profits The business is actively expanding as there is additional headcount for a number trade platform specialist Java Development with a focus on either/or Quantitative Development or low-latency performance optimization. You will be working on greenfield projects to build out and enhance their low latency … alerting, and fault tolerance SKILL/EXPERIENCE REQUIRED: Expertise in market-making or algorithmic trading, including deep understanding of order book dynamics and pricing techniques Proven track record in Java programming, specifically in building fast, low-latency trading systems Strong familiarity with market data and order execution protocols (e.g. FIX, binary, or custom APIs) Hands-on experience with JVM tuning More ❯

Azure DevOps, or Rally. Hands-on knowledge of relational databases and SQL. Familiarity with API design (JSON/XML) and testing tools like Postman. Understanding of development technologies including Java, CI/CD pipelines, cloud services (AWS, Azure, PCF), and microservices is a plus. Strong communication, organizational skills, and an ability to work independently under pressure. Self-motivated, proactive, and More ❯

A leading AWS Premier Consulting Partner is seeking a Lead Full Stack Engineer to join its growing technical team. As a key member of this cloud-native consultancy, you'll work on innovative digital solutions for a diverse range of More ❯

markets Quantitative models and analytical trading signals High-availability trading infrastructure serving institutional clients worldwide Backend systems supporting equities, futures, and listed derivatives trading What They Needs Expert-level Java development with strong object-oriented design principles Degree in Computer Science, Mathematics, or Engineering Hands-on experience building trading systems (execution algorithms, risk trading, smart routing) Deep understanding of equity More ❯

delivery of NLP/OCR projects with unstructured data Experience managing or mentoring engineers Bonus points for: Experience in regulated domains Knowledge of semantic search, graph/vector databases Java or C# background and understanding of SOLID principles 📩 Interested? Message me here or email mmatysik@trg-uk.com More ❯

GitHub Apps and Actions to maintain code quality and security standards. Integrate GitHub with internal systems such as identity providers and compliance tools. Use languages like Go, Python or Java to interact with APIs and develop robust systems. Support adoption of automation and emerging tools like GitHub Copilot (AI). Collaborate with internal DevOps, Security and Platform teams. What You More ❯