1 to 25 of 264 Permanent Java Jobs in the City of London

data migration initiatives, while working closely with engineering, DevOps, and business stakeholders in an agile environment. This role requires strong hands-on experience with Java and Spring-based frameworks, extensive knowledge of relational and non-relational databases, and proven capability in architecting scalable, secure, and high-performance data solutions … functional teams to modernize legacy database systems and migrate them to AWS-managed and cloud-native databases. Develop and maintain server-side applications using Java (Java 17+) , Spring Boot (2.5+) , and Spring Framework (5+) . Implement solutions leveraging polymorphic data types and Abstract Data Types (ADTs) to support complex data ...

Technical Lead (Java) UK (Remote with occasional London visit) £100,000 – £115,000 + Benefits Company Overview: This company is changing how people travel worldwide, and you could help. They build the tech behind major rail booking platforms, making travel easier and greener. With teams worldwide, they’ve tackled complex … team quality and confidence What they’re looking for: BSc or equivalent experience, plus 5+ years of hands-on development Strong knowledge of Java 17+, Spring, Spring Boot and Hibernate Experience with MySQL, Aurora, DynamoDB and Redis Experience working on SaaS products. Background in booking, payments or e-commerce ...

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 ...

building responsive front-end experiences Strong back-end capabilities with Node.js and Express, plus experience in at least one of C#, Java, or Python for diverse system requirements Demonstrated experience designing scalable RESTful APIs, microservices architectures, and both SQL and NoSQL database solutions Solid understanding of cyber security principles including ...

development methodologies Your Profile Experience: From 1 year in software development to Principal-level leadership Proficiency in one or more languages: C++, C#, Python, Java, JavaScript, TypeScript Familiarity with frameworks like .NET, Node.js, React, Angular, Spring Boot, Django Knowledge of cloud platforms (AWS, Azure, GCP) and DevOps tools (Docker, Kubernetes ...

Essential skills and experience: 5+ years experience of developing complex applications using an OO language (ideally Python, but experience in C++/C#/Java/etc would also be considered) Experience working on mission-critical applications, following a robust SDLC Excellent communication and problem-solving skills; and a strong ...

FullStack developer (Java and UI) Location: London, UK Hybrid: 3 days working from office Get The Future You Want! Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative … inclusive world. Your Role We are seeking an experienced FullStack developer to join our team at Capgemini Financial Services in London, UK. Key Responsibilities Java and Related Technologies Deep understanding of Java J2EE JDBC Spring Hibernate and other Java related technologies and UI related Technologies Deep understanding of Java script ...

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 ...

proposals, influencing solution design and delivery approach. Tech Stack You’ll work with modern, scalable technologies and frameworks including: Languages: JavaScript/TypeScript, Java, Frameworks: React, Angular, Node.js, Spring Boot, .NET Cloud Platforms: AWS, Azure, GCP CI/CD: Jenkins, GitHub Actions, Azure DevOps IaC: Terraform, CloudFormation, Azure Bicep Safe ...

Build Circle success stories. A non-exclusive list of some of the tooling and technology we are currently using: * .NET Core 3.1, Node.js, Python, Java/Kotlin * Kubernetes, Terraform, infrastructure-as-code * Typescript, React, Node, GraphQL, Apollo * AWS: Lambda, ECS, CloudFront, API Gateway, DynamoDB, Aurora, S3, SQS, SNS, Kinesis * Azure ...

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 ...

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 ...

Java Full Stack Engineer – Consultant/Senior Consultant Salary: £55,000 – £70,748 base plus benefits, perks, and healthcare options! Base Locations: London, Manchester, Newcastle or Glasgow (Hybrid working - operate out of any base!) Organisation : Global IT consultancy Are you a passionate Java Full Stack Engineer looking to build modern … engineering community where you’ll work with cutting-edge technologies and deliver meaningful outcomes for clients across the UK. About the Role As a Java Full Stack Engineer, you’ll be responsible for designing, building and delivering high-quality digital products that solve complex business challenges. You’ll work closely ...

Stack Cloud: AWS (EC2, S3, RDS, Lambda, EKS, IAM, Neptune), Azure (ADF, Databricks, Synapse, Data Lake, AKS, Event Hub, Power BI) Architecture: Microservices, APIs, Java/Spring Boot DevOps: GitLab, Azure DevOps, Kubernetes, Helm, Terraform Data: Data modeling, data lakes, analytics platforms, graph technologies What We’re Looking For 20+ ...

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 ...

difference! Required Skills & Experience: Extensive experience in frontend technologies (e.g., Vue.js, React) with a focus on UI/UX. Proven backend expertise, particularly with Java (Python, Node.js a plus), and experience building distributed microservices-based architectures. Strong knowledge of system design principles, scalable architecture patterns, and API design. Hands ...

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 ...

seeking an experienced Senior Java Software Engineer to join the IT team at a leading bank, supporting the delivery, maintenance, and enhancement of core systems across various business areas, including operations, compliance, transactions, and client management. This is a 6-month contract role offering an excellent day rate, ideally suited … government/public sector organisations. In this role, you will be an integral part of the software development lifecycle, working closely with Senior Java Developers, UI/UX teams, and Agile Transformation to architect, build, and deliver greenfield, brownfield, and integration applications. You will be expected to employ best design ...

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 ...

Java Full Stack Engineer (DV Cleared) Consultant Level – Digital Excellence Salary: £46,330–£55,000 base plus benefits, perks, and healthcare options! Base Locations: London, Manchester, Newcastle or Glasgow (Applicants must hold active DV clearance) Are you a Java Full Stack Engineer looking to work on cutting-edge, high-impact … driven by innovation, value collaboration, and enjoy solving complex technical challenges, we’d love to hear from you. The Role As a DV Cleared Java Full Stack Engineer, you’ll turn visionary ideas into real-world solutions for clients tackling some of the UK's most complex challenges. ...

into user flows Contribute to overall system design: service boundaries, data ownership, scaling, and observability Essential Qualifications: Built modern full-stack applications (Python/Java/Go + React) Worked with a variety of storage technologies (eg. Postgres, Mongo, Redis, Object) Experience with async and bi-directional communication protocols ...

Java Engineer – 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). Building microservices with Spring Boot and related frameworks. Developing and maintaining RESTful APIs and event-driven systems. Writing clean, testable code and following TDD principles. Working closely with DevOps ...

Overview We are seeking an experienced Senior Java Developer to join our fast-growing consultancy team of 300+ professionals. This role blends advanced technical expertise with strong communication, stakeholder management, and leadership skills. You will work closely with clients to understand their needs, design high-quality solutions, and deliver exceptional … senior consultant, you will guide teams, contribute to architectural decisions, and ensure successful project delivery. Key Responsibilities Technical Delivery Design, develop, and maintain Java-based applications using modern frameworks, best practices, and AI technologies. Implement scalable architectures, RESTful services, microservices, and integration layers. Produce clean, maintainable, and well-tested code. ...