1 to 25 of 92 Java Jobs in the City of London

policies and participate in audits and vulnerability remediation. Maintain accurate documentation, including topology diagrams, runbooks, and configuration baselines. Support proprietary messaging APIs using C++, Java, Python, and C# programming languages. Provide support for proprietary cache and gateways that integrate applications with the messaging service. Required Skills & Qualifications: 3+ years ...

with front end technologies and frameworks like React, Angular, Vue, Advanced JavaScript, HTML, CSS, SASS, LESS, Webpack Well versed with technologies and frameworks like JAVA/C#, Node, Python, Spring, AWS technologies like Lambda, ECS, S3, EMR, DynamoDB, Cognito, IOT, Step Functions, EC2, API Gateways Clear understanding of developing ...

with business teams to define data flows and ensure security protocols (encryption/authentication) are met. Technical Toolkit Languages: Proficiency in Python, R, or Java/Scala. Databases: Experience across Relational (SQL), NoSQL (MongoDB/Cassandra), and Graph (Neo4j). Big Data: Hands-on experience with Hadoop or Spark. Infrastructure ...

Change Data Feed (CDF) Strong PySpark and Spark distributed computing knowledge Experience integrating Spark with Cosmos CDF High proficiency with Cosmos DB SDKs (.NET, Java, Python, Node.js) Deep understanding of partitioning, indexing, and consistency models Experience with Azure services (Azure Functions, App Services, AKS, Logic Apps) CI/CD experience ...

Senior Java Developer | Java | Microservices | Vue.js | Up to £120k + Bonus This is the kind of role where strong Java engineers actually get to build things rather than just keep the lights on. The payments/fintech space in the UK has been exploding, and this team is right … work behind the scenes. What's going on? They’re a 150‐strong engineering function and they’re growing again. They need x2 Senior Java developers to help build and shape the core platform that processes over a million transactions a month. It’s complex engineering, working on the kind ...

Senior Full-Stack Engineer (Java & Python) We are seeking a high-impact Senior Full-Stack Engineer to join a growing technology team for a leading investment house supporting market data services within a regulated, enterprise environment. This role sits at the intersection of data engineering, full-stack development, and business … MUST have 5+ years experience in data or software engineering within financial services or a similar regulated industry. Strong full-stack experience with Python , Java (Spring Boot) , React , SQL, and relational databases. Hands-on experience with modern data engineering tools (e.g. Airflow, Spark, Kafka, dbt, Snowflake or similar). Experience ...

needed. What we’re looking for Strong software engineering experience writing clean, efficient and well-tested code in statically-typed languages (e.g., modern Java or equivalent). Deep understanding of object-oriented architecture, concurrent systems and messaging paradigms such as point-to-point, publish/subscribe and event-driven design. ...

databases and logs , and tracing issues end-to-end. Key requirements: Strong manual and/or automated testing of complex web apps Experience testing Java/Spring Boot backends REST API testing (Postman/Swagger etc.) Strong SQL skills React/Next.js frontend testing experience AWS familiarity ...

Proven hands-on experience in system design and architecture Focus on producing clean code whilst promoting excellent coding practices throughout the team Tech stack: Java 11-17, Springboot PostgreSQL/Kafka AWS/Kubernetes/Terraform Typescript/React Benefits: 10% bonus Life assurance 25 days annual leave (option ...

adopt modern cloud-native technologies and best practices Promote high engineering standards across code quality, testing, and automation Skills: Strong backend engineering capability (Golang, Java, or .NET) Strong hands-on experience building and operating distributed systems in cloud environments (AWS or GCP) Kubernetes and container orchestration experience Infrastructure as Code ...

Client: Largest American Credit Card Company Location: Burgess Hill 3 days/week Years of Exp: 6-9 years Skills: Go, Java, Git, REST, Jenkins, NoSQL, Postgres/ql £40-£50/hr Inside IR35 Visa sponsorship is not available. We're looking for an enthusiastic, diligent Golang Software Engineer ...

bring Experience of AI architectures, LLMs, vector databases, and agent frameworks such as Google ADK Strong software development experience in Python and/or Java, with familiarity with the Agile software development lifecycle. Experience with AI/ML solution development - from prototype to deployment - ideally within a large enterprise environment. ...

bring Experience of AI architectures, LLMs, vector databases, and agent frameworks such as Google ADK Strong software development experience in Python and/or Java, with familiarity with the Agile software development lifecycle. Experience with AI/ML solution development - from prototype to deployment - ideally within a large enterprise environment. ...

adopt modern cloud-native technologies and best practices Promote high engineering standards across code quality, testing, and automation Skills: Strong backend engineering capability (Golang, Java, or .NET) Strong hands-on experience building and operating distributed systems in cloud environments (AWS or GCP) Kubernetes and container orchestration experience Infrastructure as Code ...

user-focused experiences Key Skills & Experience Strong full-stack engineering background Experience with GCP, cloud architecture, and Kubernetes (K8s) Programming in JavaScript, Python, or Java Experience building digital products from concept through delivery Exposure to AI/ML or generative AI technologies Understanding of UX/UI design principles Ideal ...

Required Skills & Experience Technical Expertise (Exceptional Level) 2025+ years in QE engineering, transformation, and automation leadership. Mastery of: o Playwright, Appium, Selenium, Cypress, Java o API Automation (REST Assured, Karate, Postman) o Performance (JMeter, LoadRunner) o Cloud native testing (Azure, AWS, GCP) o Test orchestration, CI/CD pipelines ...

STEM related field. 3+ years in capital markets or financial software Strong knowledge in equity derivatives Experience in object-oriented programming such as C#, Java, and C++. C# is a plus. Knowledge of SQL and databases preferred. Good knowledge of mathematics, finance, and financial calculations. Ability to prioritize tasks ...

Strong working knowledge of Palantir Foundry and its ecosystem, ideally having led one or more Foundry implementations at scale. Technical Breadth: Proficiency in Python, Java, or similar languages, alongside strong knowledge of data architecture, DevOps, and cloud platforms (AWS, Azure, GCP). Leadership Excellence: Demonstrated ability to manage senior engineering ...

bring Experience of AI architectures, LLMs, vector databases, and agent frameworks such as Google ADK Strong software development experience in Python and/or Java, with familiarity with the Agile software development lifecycle. Experience with AI/ML solution development - from prototype to deployment - ideally within a large enterprise environment. ...

bring Experience of AI architectures, LLMs, vector databases, and agent frameworks such as Google ADK Strong software development experience in Python and/or Java, with familiarity with the Agile software development lifecycle. Experience with AI/ML solution development - from prototype to deployment - ideally within a large enterprise environment. ...

bring Experience of AI architectures, LLMs, vector databases, and agent frameworks such as Google ADK Strong software development experience in Python and/or Java, with familiarity with the Agile software development lifecycle. Experience with AI/ML solution development - from prototype to deployment - ideally within a large enterprise environment. ...

bring Experience of AI architectures, LLMs, vector databases, and agent frameworks such as Google ADK Strong software development experience in Python and/or Java, with familiarity with the Agile software development lifecycle. Experience with AI/ML solution development - from prototype to deployment - ideally within a large enterprise environment. ...

bring Experience of AI architectures, LLMs, vector databases, and agent frameworks such as Google ADK Strong software development experience in Python and/or Java, with familiarity with the Agile software development lifecycle. Experience with AI/ML solution development - from prototype to deployment - ideally within a large enterprise environment. ...

The ability to work with data throughout its lifecycle, from collection and storage to processing and analysis. Data developers are responsible for designing, implementing and maintaining the systems and infrastructure needed to handle large volumes ...

fintech startup looking for a hands-on QA Tester with a strong payments background . You’ll work directly with the CTO, testing across Java/Spring Boot APIs, React frontends, SQL databases and AWS environments . Must be comfortable digging into logs, APIs and backend systems — not just surface ...