1 to 25 of 274 Java Jobs in London

Java Engineer - Java Developer - PostGres - Kubernetes - Kafka - TDD - 6-Month Contract - Hybrid (2 days on site, London) - Day Rate: Up to £700 (Inside IR35) Join a high-performing engineering team working on large-scale, high-availability systems used by millions. This role offers the chance to build and enhance complex … backend services in a modern, cloud-native environment. What you'll be doing: Designing and developing performant, scalable backend systems using Java (up to Java 21) Working with PostGres Building microservices with Spring Boot and related frameworks Developing and maintaining RESTful APIs and event-driven systems Writing clean, testable code ...

emerging technologies and drive continuous improvement. What We're Looking For Proven experience in full-stack development and software architecture. Hands-on expertise with Java, Spring Boot , and microservices. Strong understanding of Agile and DevOps practices. Familiarity with cloud platforms (AWS, Azure, GCP) and Infrastructure as Code. Experience with ...

standards of quality, security, and performance. What We're Looking For Extensive experience in full-stack development and software architecture. Hands-on expertise with Java, Spring Boot, Python , and microservices (additional languagaes are a benefit). Strong knowledge of Agile , TDD , and DevOps methodologies. Proficiency with cloud platforms (AWS, Azure ...

Senior Java Developer - Java, Springboot & AWS – paying up to £650/day (Inside IR35) – Hybrid (2x a week - London) – 6 month contract Our client is seeking a Senior Java Developer who is passionate about clean code, cloud-native systems, and building technology that makes a real impact. This … unique opportunity to work in an agile, high-ownership engineering culture. What You'll Be Doing: Build and scale backend services using Java and Spring Boot Shape a modern microservices architecture for a high-availability platform Deploy and manage services in AWS with Kubernetes (EKS) Design, implement, and own features ...

client EBRD has reopened this position and is looking for a strong Senior Java Developer with experience in OpenText Livelink implementation . Java + Livelink is highly preferred , but candidates with strong Java experience and some exposure to Livelink APIs will also be considered. Position Details Role: Senior Java Developer … Java + OpenText Livelink) Type: Fixed-Term Contract (FTC) Duration: 6 Months Location: London, UK Work Mode: Hybrid (2–3 days/week onsite) Client: EBRD Interview Rounds: 2 Notice Period: 2–3 weeks acceptable Job Description We are looking for an experienced Senior Java Developer with strong expertise ...

seasoned Data Engineer Experience building new data platforms from scratch, including low-level and high-level design. Strong coding skills in Java (Spring Boot) for data engineering and services. Proven background working within financial services environments. Hands-on experience building and managing Apache Spark and Hadoop clusters. Deep experience ...

Healthcare Frontend Toolkit and Design System to build accessible, user-focused interfaces. Develop back-end services primarily in Python , while supporting existing systems in Java and .NET . Maintain and enhance legacy services using Oracle SQL PL . Implement robust CI/CD pipelines and infrastructure using AWS, Azure ...

Tech stack required ideally: You can expect to work with the following technologies to ensure scalable, high-performance applications: Programming Languages: JavaScript/TypeScript, Java, C# Frameworks: Vue/Angular/React/Node/Next, Spring/Spring Boot, .NET/ASP.NET Cloud platforms: AWS, GCP, Azure CI/ ...

experience in software engineering, with a focus on large-scale, complex systems. Polyglot engineer comfortable working across multiple languages and frameworks (weve used Python, Java, Kotlin, Node.js, C#, JavaScript, Express, React and Next.js to name a few). Passion for learning new technologies and helping others do the same. Proven ...

working with complex data challenges. Python as the preferred back-end language for new services, however we also need to support languages including Java and .NET. Oracle SQL PL to support existing services. Infrastructure/DevOps technologies including AWS, Azure, SQL server, Postgres, GitHub, Azure DevOps, Linux, docker and Kubernetes ...

contributing to a range of backend services. What you'll be doing: Developing new services primarily in Python, while supporting existing applications written in Java and .NET. Working with Oracle SQL PL to maintain and enhance current services. Collaborating on infrastructure and DevOps tasks using AWS, Azure, SQL Server, Postgres ...

NoSQL databases (especially MongoDB) or SQL (e.g., Postgres) Understanding of web standards, accessibility and development best practice Bonus Skills Building microservices in C# or Java Integrating LLMs (e.g., LangChain, Vercel AI) Using the GOV.UK Design System and Nunjucks What You'll Love You'll join a community that values technical ...

Architect, Cloud CX, WEM). Familiarity with competitors like Amazon Connect or Salesforce Service Cloud is a plus. Modern Tech Stack: Deep knowledge of Java/Node.js, Spring Boot, Kubernetes (K8s), Docker, and GraphQL for app modernization. AI/ML Proficiency: Hands-on experience with Agentic AI workflows, Self-Service ...

DevSec & Responsible AI: Privacy‐by‐design, PII handling, secrets management, policy enforcement, human‐in‐the‐loop approvals, auditability. Languages: Advanced Python plus one of Java/TypeScript/Go; containerization (Docker/K8s). Leadership & Communication: Executive presence: influence C‐suite decisions with crisp, data‐backed narratives. Lead distributed teams ...

Java Full Stack Engineer Location: UK (Hybrid, with flexibility for client site travel) Type: Permanent Clearance: Eligible for UK security clearance Join a leading global consultancy driving digital transformation across industries. As a Java Full Stack Engineer , you'll work on high-profile projects that combine cutting-edge technology with … collaborative, client-facing environment while growing your skills in a fast-paced consultancy setting. What You'll Do Build and maintain microservices using Java (Spring Boot) . Develop front-end applications with React, TypeScript , HTML, and CSS. Work with cloud platforms ( AWS, Azure ) and containerization tools ( Docker, Kubernetes ). Implement ...

Java Engineer Salary to £60k + Company Options Scheme Hybrid working between your home, their offices (London Vauxhall) & client sites. NB: Please only apply if you are a UK National and able to achieve either SC or DV clearance. (SC) 5 years & (DV) 10 years residency in the UK with … data and deliver citizen services. Theyre growing fast and looking for bright, dynamic people to help build their business. Role Theyre looking for a Java Engineer to join their implementation team. Youll work across Camunda BPMN/DMN process automation, API integration, and microservice orchestration helping their public-sector clients ...

agile environments Desirable Experience Docker, Docker Compose Terraform or other IaC tools EF Core, relational DB experience NoSQL (MongoDB, Cosmos DB) Microservices in Java/JS/TS Experience with LLM/AI integration frameworks (e.g., LangChain) Familiarity with modern design systems Additional Information A flexible benefits package is available ...

Clearance (or eligibility at minimum) Proven full stack development experience within the UK public sector Cloud experience (AWS, Azure, or GCP) Strong experience with Java or Python Front-end experience using modern JavaScript frameworks (e.g. React, Angular, Vue) Familiarity with RESTful APIs, databases, and version control Experience working in agile ...

overall system design: service boundaries, data ownership, scaling, and observability Essential Qualifications: Built modern full-stack applications w/focus on backend (Python/Java/Go) Worked with a variety of storage technologies (eg. Postgres, Mongo, Redis, Object) Experience with async and bi-directional communication protocols and patterns (eg. ...

including RDDs, Data Frames, and Spark SQL Python/Notebook programming PySpark programming Spark Streaming/batch processing Delta table Optimization Fabric spark jobs Java programming language, OOP knowledge Database knowledge, including Relational Database and Non-SQL database. Experience of using the tools: Gitlab, Python unit test, CICD pipeline. Good ...

than ticking every box. However, experience in any of the following areas would be advantageous: Software development in web technologies or OOP (e.g., Python, Java, etc.) Database tech: Oracle SQL, PostgreSQL, MongoDB Proficient with Linux/Windows command line (Bash, PowerShell) Monitoring: Grafana, Prometheus, ELK, Splunk Agile working and tooling ...

than ticking every box. However, experience in any of the following areas would be advantageous: Software development in web technologies or OOP (e.g., Python, Java, etc.) Database tech: Oracle SQL, PostgreSQL, MongoDB Proficient with Linux/Windows command line (Bash, PowerShell) Monitoring: Grafana, Prometheus, ELK, Splunk Agile working and tooling ...

Proven experience in software development, with at least 5 years in a similar role. Strong proficiency in programming languages such as Typescript, JavaScript and Java Experience with Spring and React. Outstanding problem-solving skills and the ability to thrive in a fast-paced, ambitious environment. Proficient in software design patterns ...

Senior Java/Kotlin Engineer – Technology Consultancy Location: Hybrid (2 days a week in London) Type: Full-time Salary - £130k Maximum Client They are forward-thinking technology consultancy that helps organisations solve complex problems with elegant, modern engineering. The team is built around curiosity, delivery excellence, and genuine collaboration. They … retail, healthtech, scale-ups, and the public sector to design and build high-impact digital products. The Role We’re looking for a Senior Java/Kotlin Engineer who thrives in solving real-world problems and building robust, scalable systems. You’ll work closely with cross-functional project teams—architects ...

Senior Fullstack Engineer - Fintech Scale-Up (Java, Angular, Azure) Titles: Senior Fullstack Engineer Tech Stack: Java | Spring | Azure | Angular Location: London (Hybrid - 2-3 days/week) Package: £85-95k + 20% bonus The Company: Growing fintech working with major banks on business banking products, providing solutions and serving … thousands of businesses. The Role Hiring a Senior Fullstack Engineer to build scalable Java microservices for core banking platforms. Take ownership of key components and work with a talented team on high-performance financial solutions. What you'll do as a Senior Fullstack Engineer: Design and develop Java microservices (Spring ...