1,376 to 1,400 of 2,297 Java Jobs in London

number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity) Our technology stack is based predominantly on Java 25 on the backend with Postgres database We rely on Spring Boot for quick and quality delivery We have a pragmatic approach to develop … maintainability and fast turnaround with TDD, DDD and continuous integration & delivery What you'll need Demonstrable experience in Backend development, with fluency in Java Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering/Science disciplines Quick learner with an ambitious and results driven personality, with ...

number of systems that our business depends on (e.g. card payments, treasury management, transactions booking, crypto liquidity) Our technology stack is based predominantly on Java 25 on the backend with Postgres database We rely on Spring Boot for quick and quality delivery We have a pragmatic approach to develop … maintainability and fast turnaround with TDD, DDD and continuous integration & delivery What you'll need Demonstrable experience in Backend development, with fluency in Java Bachelor's Degree (or above) in Computer Science, Mathematics, Physics, or other Engineering/Science disciplines Quick learner with an ambitious and results driven personality, with ...

real difference. As a Full Stack Engineer in our team, you will design, build, and support scalable web applications and integrations. You will leverage Java, Python, and React to deliver AI-enabled features and capabilities. Your role involves collaborating with product, marketing, and partners to translate requirements into technical solutions. … compliance standards. Your work will help us deliver personalized and reliable experiences. Job Responsibilities: Design, develop, test, and maintain full-stack features using Java, Python, React, and AI-enabled services Build reliable integrations with marketing systems such as CDP/CRM, campaign management, and attribution systems Implement and optimize data ...

real difference. As a Full Stack Engineer in our team, you will design, build, and support scalable web applications and integrations. You will leverage Java, Python, and React to deliver AI-enabled features and capabilities. Your role involves collaborating with product, marketing, and partners to translate requirements into technical solutions. … compliance standards. Your work will help us deliver personalized and reliable experiences. Job Responsibilities: Design, develop, test, and maintain full-stack features using Java, Python, React, and AI-enabled servicesBuild reliable integrations with marketing systems such as CDP/CRM, campaign management, and attribution systemsImplement and optimize data flows ...

stay aligned, so when in doubt, bring people in. Key Responsibilities You’ll take ownership of features across Inventory Lab’s C# and Java-based systems, delivering them from initial design through to production. You’ll design and build clean, scalable services, APIs, and components that are maintainable, well-tested … improvements that deliver meaningful value to Inventory Lab customers. About You 5–8+ years of professional software engineering experience Strong proficiency in C# and Java Experience building and maintaining backend services, APIs, and scalable application components Solid understanding of REST APIs, system design, and scalable application patterns Experience working with ...

learning, mobile) In-depth knowledge of the financial services industry and IT systems Practical cloud native experience Preferred Qualifications, Capabilities, and Skills: Experience with Java and Oracle Familiarity with messaging platforms such as RMQ and Kafka Knowledge of Kubernetes Experience with ReactJS and JavaScript Functional knowledge of FX or Derivatives ...

opportunity and is a major growth target for Citi – with technology providing the key to unlock this potential. Responsibilities: Ownership and delivery on components (Java/Kotlin) within the Core Prime Brokerage platform. Hands-on Development. Actively contribute to an agile development, applying and improving skills in Continuous Integration … team on deliveries and engage in peer reviews such as code reviews/pull requests. Coach and mentor junior analysts and grads. Technical Experience: Java & Test-Driven Development are essential. Experience in any number of additional technologies (listed below) is advantageous: Kotlin Cloud Technologies (Kubernetes, Open Shift) Messaging Technologies (Kafka ...

learning, mobile) In‐depth knowledge of the financial services industry and IT systems Practical cloud native experience Preferred Qualifications, Capabilities, and Skills Experience with Java and Oracle Familiarity with messaging platforms such as RMQ and Kafka Knowledge of Kubernetes Experience with ReactJS and JavaScript Functional knowledge of FX or Derivatives ...

applied experience. Hands-on practical experience delivering system design, application development, testing, and operational stability. Advanced proficiency in one or more programming languages (e.g., Java ). Proficient in all aspects of the SDLC and advanced understanding of agile methodologies and practices, including CI/CD, Application Resiliency, and Security . ...

about our tools, tech and people, head to our tech blog. What you'll be doing Designing and building new features and enhancements using Java 17+, Spring Boot, Elasticsearch, Kafka, Gradle, Hibernate, Couchbase, SQL, and Docker. Collaborating with cross‐functional teams and stakeholders to shape solutions and align on priorities. … junior engineers, helping to build a culture of growth, ownership, and continuous improvement. We're looking for someone who Brings strong commercial experience with Java 17+, Spring Boot, and Kafka. Has successfully led complex projects, including coordinating work across multiple engineers. Is highly collaborative, organised, and solution-focused in their ...

Contract Senior Java Developer – Data Up to 700 per day Outside IR35 (6 month rolling)In office – City of LondonQuant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward … PostgreSQL. This is a growing team focused on data ingestion and building tooling for the wider firm. What you'll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the businessWrite clean, testable code with solid engineering discipline (testing, code review, debugging, production support)Maintain ...

many teams across the company, so correctness, reliability, and thoughtful API design matter enormously. QualificationsWhat do you need?:5+ years of experience in Java, Kotlin, Python or Go Strong experience with Spring framework, relational databases, distributed and concurrent systems (Kafka)Great cross-team communication - Can discuss and champion complex, technical ...

talks, ability to travel to conferences, and dedicated time for your personal development What you'll be working with: Backend: Distributed, event-driven core Java (90% of the code-base), MySQL, Kafka Frontend: Javascript, Vue.js Deployment: Kubernetes, Nomad Data analytics: Python & Jupyter notebooks, Parquet, Docker Testing: JUnit, JMH, JCStress, Jenkins ...

experience designing, implementing, testing, and ensuring operational stability of large‐scale enterprise data platforms Advanced skills in one or more programming languages such as Java, Python, C/C++, or C# Practical experience delivering system design, application development, testing, and operational stability Working knowledge of relational and NoSQL databases ...

machine learning, or mobile)In-depth knowledge of the financial services industry and IT systemsPractical cloud native experiencePreferred Qualifications, Capabilities, and Skills: Experience with Java 21Familiarity with Spring framework and Spring BootKnowledge of RDBMS and NoSQL databasesExperience with KafkaExpertise in microservices architectureAbility to leverage AI tools like MCP servers ...

concepts and applied experience Recent hands‐on professional experience as a back‐end software engineer Experience in coding in a recent version of the Java programming language Experience in designing and implementing effective tests (unit, component, integration, end‐to‐end, performance, etc.) Excellent written and verbal communicationskills in English Experience ...

applied experience. Hands-on practical experience delivering system design, application development, testing, and operational stability. Advanced proficiency in one or more programming languages (e.g., Java).Proficient in all aspects of the SDLC and advanced understanding of agile methodologies and practices, including CI/CD, Application Resiliency, and Security. Demonstrated experience ...

experience designing, implementing, testing, and ensuring operational stability of large-scale enterprise data platformsAdvanced skills in one or more programming languages such as Java, Python, C/C++, or C#Practical experience delivering system design, application development, testing, and operational stabilityWorking knowledge of relational and NoSQL databases and data lake architecturesExperience ...

experience designing, implementing, testing, and ensuring operational stability of large-scale enterprise data platforms Advanced skills in one or more programming languages such as Java, Python, C/C++, or C# Practical experience delivering system design, application development, testing, and operational stability Working knowledge of relational and NoSQL databases ...

Java Software Engineer – Data EngineeringUp to 70,000 + bonus and benefits4:1 hybrid in office – City of LondonQuant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward Python … PostgreSQL. This is a growing team focused on data ingestion and building tooling for the wider firm. What you'll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the businessWrite clean, testable code with solid engineering discipline (testing, code review, debugging, production support)Maintain ...

Java Software Engineer – Data EngineeringUp to 100,000 + bonus and benefits4:1 hybrid in office – City of LondonQuant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward Python … PostgreSQL. This is a growing team focused on data ingestion and building tooling for the wider firm. What you'll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the businessWrite clean, testable code with solid engineering discipline (testing, code review, debugging, production support)Maintain ...

Tech Stack is listed below. We don't ask that you have experience in all of this, but if you do, that's great! Java (makes up the majority of our backend codebase) AWS & GCP (we're cloud-native)Distributed service-based architectureKubernetes (EKS)TeamCity for CI/CD (lots ...

Core Java Developer Fintech High Freq Trading – 80,000 + bonus and benefitsQuant Capital is urgently looking for a Core Java Developer to join our high profile client. Our client is a well known specialized High Frequency FX Prop Trading firm. Their platform is based on distributed low latency systems … involving complex multi-threading where performance is key. This is a fantastic opportunity for a Core Java J2SE expert to join a growing firmThis is a broad role for a Java developer encompassing a complex front end trading application, performance improvement, market connectors, and analysis tools. You will be involved ...

client is based in Central London, this role is hybrid 1 day a week in the office, potentially 4 per month in bulk. QA, Java Engineer, Java Developer, React. JS Growth Javascript CSS HTML Frontend Ruby, Java, Ruby on Rails, CSS, HTML5, Linux REST, Javascript ...

Contract Senior Java Developer – Data/MarketmakingOutside IR35 (6 month rolling) In office – City of LondonQuant Capital is hiring for a small, high-performing market maker in London. This is a junior-to-mid role focused primarily on Java development, with a secondary responsibility owning straightforward Python ETL/data … PostgreSQL. This si a growing team focused on data ingestion and building tooling for the wider firm. What you'll do: Build and enhance Java backend services (APIs, batch jobs, integrations) used across the businessWrite clean, testable code with solid engineering discipline (testing, code review, debugging, production support)Maintain ...