1 to 25 of 461 Permanent Java Jobs in London

Location: London (Hybrid) Type: Permanent Rate/Salary: Competitive Role Overview A leading financial organisation is seeking a Backend Java Developer to design and build robust backend services and applications within a high-availability, performance-critical environment. Youll work on modern Java services and microservices, delivering reliable APIs and scalable … based in London, with an expectation to attend the office three days per week. Key Responsibilities Design, develop and maintain backend services using modern Java (Java 17+), following secure coding and clean architecture principles. Build and evolve microservices and RESTful APIs to support scalable and resilient platform capabilities. Collaborate with ...

Description Hays are now looking for a Java Developer on a 12 month contract. The client requires all candidates to already hold SC Clearance and NPPV3. £428 Inside IR35 Mainly Remote (once a month in Bridgend or Reading) Candidates must hold current NPPV3 & SC Clearance 12 month contract Our client … maintain a critical national policing system used across the UK. This role focuses on Level 3 support, troubleshooting, and ongoing development of legacy Java-based applications in a highly collaborative environment.Working closely with Support, Platform, and DBA teams, you will play a key role in ensuring system stability, implementing enhancements ...

Tier Investment bank requires an experienced hands-on Java developer and technical architect with deep expertise in real-time third-party payments, high-throughput zero-downtime systems, and highly available, global-scale internet-facing APIs. This role is central to scaling the TFX technology platform for major retail clients … maintaining software solutions that support business needs. What You'll Do In The Role Act as a senior individual contributor who combines hands-on Java development with architectural leadership, remaining close to implementation and setting the technical standard through design, code-level guidance, and practical problem solving. Design, build ...

SDLC to rapidly comprehend large codebases, generate production‐quality code, and accelerate delivery. Required Qualifications 8+ years of professional software development experience in Java (Java 17+ preferred), with strong command of concurrency, collections, and modern language features. Demonstrated experience with AI‐assisted engineering tools (e.g., Claude Code, GitHub Copilot Agent ...

SDLC to rapidly comprehend large codebases, generate production‐quality code, and accelerate delivery. Required Qualifications 8+ years of professional software development experience in Java (Java 17+ preferred), with strong command of concurrency, collections, and modern language features. Demonstrated experience with AI assisted engineering tools (e.g., Claude Code, GitHub Copilot Agent ...

Hands‐on experience with: Infrastructure as Code (Terraform, Ansible or similar) CI/CD pipelines and DevOps tooling C# (.NET 8+) and/or Java (Spring) JavaScript using a modern framework (React, Angular or similar) Bash and PowerShell AWS, ideally including Amazon Connect Containerisation and orchestration (Docker, Kubernetes) Linux environments ...

Senior Java Software Engineer - Java Developer, Python, AWS, MySQL, NoSql, REST APIs, Microservices, Machine Learning, Artificial intelligence (Hybrid - 3 days a week in the office - Notting Hill) Description for the Senior Java Software Engineer role:- You will be joining a fast-growing, research-driven company building an artificial intelligence using … machine learning techniques. My client is revolutionising their industry with a track record of building things that others have ruled out as impossible. The Java Software engineer will join a very bright, talented team of engineers with the guidance of technologists who have help build up some of the best ...

developing and deploying microservices on AWS; knowledge of Infrastructure-as-Code; DevOps, and experience with NoSQL databases. Demonstrably good coding skills, ideally in Java and/or Python; knowledge of RESTful APIs and service integration patterns and security frameworks such as OAuth 2.0 or OpenID Connect (OIDC). You must ...

problems from monoliths to microservices, upskilling colleagues and customers, always learning from others, while constantly striving to be nice humans. Our teams have used Java, Ruby, Python, ES6 with React, as well as C# with .NET Core. We don’t limit ourselves as a company and we expect ...

Proven experience in implementing AI‐driven applications and SaaS (multi‐tenant) solutions. Strong technical proficiency in both frontend and backend development (e.g., React, Python, Java, Typescript). Proven experience with systems design, design patterns, architectural trade‐offs, and integration best practices. Proven experience with automated testing frameworks (e.g. Zypher, Pytest ...

Senior Java Engineer - Permanent Salary: 55k-65kWorking Arrangement: Fully RemoteTech Stack: Java, Spring Boot and Cloud Platforms(AWS, Azure and GCP)Desirable - Python and JavaScript I am currently working with a leading software software consultancy working with the government for a Senior Java Engineer. This role involves mentoring junior engineers … best practices in software development. Essential Proven experience in full-stack software development, including design, development, testing, and deployment. Significant hands on experience with Java, Spring Boot and Microservices. Strong understanding of Agile and DevOps practices, with a focus on continuous integration and delivery. Some proficiency in one or more ...

Senior Java Engineer - Permanent Salary: 55k-65k Working Arrangement: Fully Remote Tech Stack: Java, Spring Boot and Cloud Platforms(AWS, Azure and GCP) Desirable - Python and JavaScript I am currently working with a leading software software consultancy working with the government for a Senior Java Engineer. This role involves mentoring … best practices in software development. Essential Proven experience in full-stack software development, including design, development, testing, and deployment. Significant hands on experience with Java, Spring Boot and Microservices. Strong understanding of Agile and DevOps practices, with a focus on continuous integration and delivery. Some proficiency in one or more ...

etc.) Key Requirements: Strong experience in DevOps, platform engineering, or infrastructure engineering Experience with one or more scripting/programming languages: Python PowerShell C#, Java or C++ Hands-on experience with: Infrastructure as Code (Terraform, Ansible, Packer) Containerisation and orchestration (Docker, Kubernetes) CI/CD pipelines and automation Experience with ...

contribute to capability development across the team. Required Skills & Qualifications: Strong hands-on experience in front-end & application development (React.js/Next.js), backend development (Java or Python), and building secure, scalable APIs and distributed applications. Expertise in data engineering & platforms including SQL, data warehousing, ETL/ELT pipelines, data modelling ...

principles of continuous experimentation and validation. What skills do you have? Expert level knowledge of at least one object‐oriented programming language (C#, Java, JS, Kotlin, Python, PHP, Golang, C++) Flexibility to work on all areas of the service stack, front‐end, back‐end, infrastructure, etc. Strong understanding ...

strong background in systems administration (Linux/Windows) in a large-scale environment.* Proficiency in at least one programming language (e.g., Python, Go, Java).* Hands-on experience with a major cloud platform (AWS, GCP, or Azure), with a high preference for AWS.* Solid understanding of networking, containers (Docker, Kubernetes ...

Java Engineer Salary to £50k + Company Options Scheme Fully remote working available for the right candidate (hybrid working between your home, their offices (London Vauxhall) & client sites would be preferred but isnt essential). NB: Please only apply if you have resided in the UK for the past … anywhere but will most likely be in & around London. Responsibilities Design, develop, and deploy Camunda-based process and decision automation solutions Implement and integrate Java-based microservices, APIs, and connectors within orchestration flows Translate BPMN and DMN models into executable workflows and reusable components Collaborate closely with analysts and service ...

/CD pipelines, implementing Infrastructure-as-Code, and embedding security principles into development from day one. Key Requirements Strong software development background (e.g. Java, Python, C#, etc.) Experience with CI/CD (Jenkins, GitLab), cloud (AWS/Azure/GCP), containers (Kubernetes/Docker), or IaC (Terraform/Ansible) Comfortable ...

with Equation and SQL Server environments. Technical Skills Strong knowledge of software development methodologies (e.g., Agile, Scrum, DevOps). Proficiency in programming languages (e.g., Java, C#, Python) and software development tools. Experience with core banking systems (e.g., Equation), Treasury systems, and finance systems. Proficiency in SQL Server and database management. ...

using modern data engineering techniques (e.g. distributed systems, data streaming, event-based architectures etc) Software development experience with one or more languages (e.g. Python, Java, C#) Solid software engineering and DevOps skills as well as the complete SDLC applied to data, e.g. design patterns, automation, testing, contract definition, clean code ...

experience, with deep expertise in both backend and frontend systems. Strong programming skills and CS fundamentals, with mastery in at least one backend language (Java, Python, etc.) and modern frontend frameworks (React, Angular, TypeScript). Proven experience designing and evolving large scale distributed systems and microservice architectures. Demonstrated ability ...

architectures and CAP theorem. A good understanding of functional paradigms and type theory. Confident JVM knowledge. Modern programming languages knowledge in our primary languages (Java, Python, Clojure). Experience with Airflow or other Python‐based workflow orchestration tools. Proficiency in domain‐driven design and domain modeling. Exposure to Kubernetes, Docker ...

Modern data stack & DataOps (Snowflake, Databricks) Platform architecture & engineering (ETL/ELT, modelling, warehousing) Cloud platforms (AWS, Azure, GCP) Programming (SQL essential, Python, Spark, Java/Scala) Data governance & security (including GDPR) Advanced analytics & AI/ML Experience building and scaling enterprise data platforms and leading transformation at scale What ...

monitoring, APM, infrastructure, log management, security analytics, and automation Broader observability tooling knowledge advantageous: Splunk, Elastic, Datadog, Cribl Application-stack and programming awareness advantageous: Java and/or .NET, web technologies (JavaScript), SQL/relational databases, and distributed/microservices architectures (J2EE, .NET, microservices) Strong client management — comfortable with senior ...

flexibly consider different technologies/engineering approaches to achieve this. You have advanced working knowledge of a general programming language (e.g. Python, Java, C#, Typescript etc.) and understand both domain modelling and application programming. You have working knowledge of data management technologies (SQL, NoSQL, Databricks etc.). You have working ...