101 to 125 of 336 Java Jobs in London

What were looking for: 6+ years professional software development experience Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices) Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage Background in distributed systems and large-scale compute frameworks Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation This role offers the chance More ❯

we’re looking for: 6+ years’ professional software development experience Strong proficiency in high-performance Python (deep ecosystem knowledge and best practices) Experience with at least one JVM language (Java, Kotlin, Scala) is an advantage Background in distributed systems and large-scale compute frameworks Familiarity with Docker, Kubernetes, Linux environments, and CI/CD automation This role offers the chance More ❯

cross-functional teams Work with Stakeholders to understand requirements and deliver high-quality outcomes Mentor junior developers Required Skills & Experience Strong experience in one or more of the following: Java, Kotlin, Scala, Ruby Solid understanding of software engineering principles and best practices Experience working in client-facing roles is a plus Excellent problem-solving and communication skills Experience with GDS More ❯

time-series data. Experience building dashboards, reporting tools, or data visualisations. Knowledge of distributed systems, resiliency, and performance optimisation. Proficiency in at least one other programming language (e.g., Python, Java, C++) is desirable. Strong problem-solving and analytical skills, with the ability to work under pressure in fast-paced environments. Excellent communication and collaboration skills for working with cross-functional More ❯

distributed systems and architectures. Familiarity with containerization (Docker, Kubernetes) and Linux environments. Hands-on experience with CI/CD pipelines and automation tools. Bonus: exposure to JVM-based languages (Java, Kotlin, Scala). This is a rare opportunity to contribute to the core internal frameworks of a global organisation while working alongside some of the brightest minds in engineering. If More ❯

capabilities that allow us to build, assure, deploy and operate these services. Essential Skills: Significant demonstrable experience in one or both of: Modern Software Engineering for Digital Products (ideally Java, microservice architectures, Hexagonal software architecture, Mongo and Kafka). OR designing and implementing modern cloud infrastructure, DevOps, and automation (ideally AWS, Terraform, GitLab CI, Jenkins). Significant demonstrable experience of More ❯

code, cloud infrastructure, and strong security practices is essential. Senior Platform Engineer - Key Skills & Experience: Solid background in software engineering, with significant platform or backend experience Proficiency in Go, Java, or Python for building internal tools and services Strong expertise in AWS, including CloudFront and related web application services Hands-on experience with CI/CD pipelines and modern deployment More ❯

for a C++ developer to be part of the low latency development team. The team provides industry leading low-latency trading services for our clients, utilizing FPGA, C++ and Java technologies. The candidate will be focusing on the C++ components. The ideal candidate: Is motivated by working in a high performing team, Is flexible to change of work streams as More ❯

record designing API-centric solutions (REST, SOAP, GraphQL) and implementing event-driven patterns . Strong understanding of integration architectures , microservices , and services-based delivery models . Solid knowledge of Java, .NET, SQL, and SOA environments, plus experience with modern frameworks (Spring, Hibernate, etc.). Hands-on experience with middleware technologies (WebSphere, JBoss, Datapower) and cloud-native platforms . Familiarity with More ❯

internal applications that improve efficiency. Requirements: We’re looking for someone who enjoys variety and is comfortable working across a polyglot environment, with experience in: Object Oriented Programming MVC Java frameworks (ideally Spring/Jakarta EE/Grails) Frontend: JavaScript, jQuery, HTML CSS REST web services ORM (e.g. Hibernate) Working knowledge of Linux MySQL or PostgreSQL You should also bring More ❯

Risk team. BASIC QUALIFICATIONS - A Master in Computer Science, Machine Learning, Statistics, Operations Research or relevant field - 8+ years of building models for business application experience - Experience programming in Java, C++, Python or related language - Good written and spoken communication skills - Experience of building/developing teams, direct and shape the team plan, culture and strategy. - Experience in any of More ❯

deliver real value to our customers while maintaining our culture of collaboration, learning, and continuous improvement. To be successful in this role you should have: Required Skills: Proficiency in Java and BDD testing frameworks Experience with AWS or other public cloud platforms Proven ability to build high-scale distributed systems Deep understanding of authorization models (ReBAC, ABAC, RBAC) and Policy More ❯

deliver real value to our customers while maintaining our culture of collaboration, learning, and continuous improvement. To be successful in this role you should have: Required Skills: Proficiency in Java and BDD testing frameworks Experience with AWS or other public cloud platforms Proven ability to build high-scale distributed systems Deep understanding of authorization models (ReBAC, ABAC, RBAC) and Policy More ❯

preferably Azure. Expertise with Data Warehousing/Data Lakes. Proficiency in SQL for data extraction and analysis. Strong experience with data visualization tools such as PowerBI and Tableau. Understanding Java is a plus. Desired Behaviors Independence: Ability to solve complex problems independently as an advanced individual contributor. Adaptability: Demonstrates flexibility and openness to change. Actively seeks and adopts improved approaches More ❯

of experience as an Android engineer Detail-oriented - Attention to detail, animations and transitions Patterns - Understanding of the native platform UI/UX patterns Technology - Expert knowledge of Kotlin, Java, Coroutines, multi-module projects, DI Libraries - Familiarity with Koin, Retrofit, OKHttp, ViewBinding, Firebase, Gradle Automation - Experience with Google Play Store releases automation, e.g.: Fastlane Navigation - Deep Linking, reusable screens and More ❯

Has experience working as a software developer. Has experience in building the backend for large cloud based distributed systems. Has experience of a backend language such as Go, C++, Java, Rust or Python. Wants a career where their creative abilities will make a difference to the world of technology and where they will be part of an impressive R&D More ❯

corporate organisations. Experience with IAM engineering experience across authentication, authorisation, single sign-on, multi-factor authentication, identity lifecycle management, OAuth2.0, OpenID Connect, SAML and policy management Expertise with JavaScript, Java, Python, and must be comfortable with API and microservices development. Strong working knowledge of Site Reliability Engineering principles Experience with Cloud computing (AWS is essential, Azure is a plus) Some More ❯

corporate organisations. Experience with IAM engineering experience across authentication, authorisation, single sign-on, multi-factor authentication, identity lifecycle management, OAuth2.0, OpenID Connect, SAML and policy management Expertise with JavaScript, Java, Python, and must be comfortable with API and microservices development. Strong working knowledge of Site Reliability Engineering principles Experience with Cloud computing (AWS is essential, Azure is a plus) Some More ❯

and risk mitigation - Experience with integration of cloud services with on-premise technologies from microsoft, ibm, oracle, hp, sap - Experience developing software code in one or more programming languages (java, python, etc.) - Relevant experience in building large scale machine learning or deep learning models and Generative AI model development - Eligibility for the UK Security Clearance PREFERRED QUALIFICATIONS - Knowledge of the More ❯

Lead Java Developer/Software Engineer London/WFH to £115k Are you a hands-on Java Developer with leadership skills? You could be progressing your career in a Lead Java Developer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As a Lead Java Developer you'll … engineers and ensure code quality, observability, scalability and security are embedded into high-quality, high-impact releases. You'll be working with a modern, cloud native tech stack using Java, Spring Boot, AWS, Kafka and CI/CD to build highly scalable, distributed systems with 24/7 availability. Location/WFH: There's a hybrid model with two days … including roof terrace, restaurant and break out areas. About you: You have strong technical and people leadership skills You have advanced experience of building cloud-native, distributed systems using Java and Spring Boot You have a strong knowledge of AWS including Amazon EKS You have experience with Kafka and event driven architectures You're collaborative and pragmatic with great communication More ❯

Lead Java Developer/Software Engineer London/WFH to £115k Are you a hands-on Java Developer with leadership skills? You could be progressing your career in a Lead Java Developer role at a global FinTech/CFD trading company that has been consistently voted as one of the UKs top employers. As a Lead Java Developer you'll … engineers and ensure code quality, observability, scalability and security are embedded into high-quality, high-impact releases. You'll be working with a modern, cloud native tech stack using Java, Spring Boot, AWS, Kafka and CI/CD to build highly scalable, distributed systems with 24/7 availability. Location/WFH: There's a hybrid model with two days … including roof terrace, restaurant and break out areas. About you: You have strong technical and people leadership skills You have advanced experience of building cloud-native, distributed systems using Java and Spring Boot You have a strong knowledge of AWS including Amazon EKS You have experience with Kafka and event driven architectures You're collaborative and pragmatic with great communication More ❯

system for Citi trading desks and enterprise users in the largest global financial markets and exchanges in New York, London, and other major financial hubs. Our team owns multiple Java Spring Boot Services that execute, partition, and track quantitative risk graphs/trades in a distributed environment. These graphs can fail due to their complexity and our system must adapt … point of contact for clients to address issues and optimize inefficiencies that arise during distributed workload execution. Qualifications: Multiple years professional software development experience with Java. Solid experience with Java frameworks (e.g., Spring, Spring Boot, Quarkus). Experience designing, building, and maintaining large-scale, distributed systems. Experience with RESTful API design and implementation. Strong understanding of object-oriented programming and More ❯

clients. Solution is scalable to cover multiple locations and meet latency requirements. Team is growing fast and now we are looking for a strong and motivated FX Risk Lead Java Developer. Key Responsibilities Design, develop, and maintain Java-based microservices for high-throughput application Integrate and optimize Apache Ignite based solution: in memory data grid for FX trades processing Implement … pipelines Conduct performance tuning, code reviews, and troubleshooting production issues Document system architecture, design decisions, and development processes What we want from you Strong hands-on experience with Core Java and multithreading in high load system Practice with JVM performance optimization and memory profiling Familiarity with distributed systems architecture and in-memory computing concepts Proven experience with in-memory caching More ❯

HM Passport Office , and more. We specialize in user-centred design, agile delivery, and technology that makes a real difference. About the Role We are looking for a talented Java Developer with strong expertise in Spring Boot to join our team. You'll be involved in the full software development lifecycle-designing, developing, and maintaining high-performance applications that are … and reliable. This is a great opportunity to work with modern tools, frameworks, and cloud technologies while contributing to impactful projects. Key Responsibilities Application Development: Design, develop, and implement Java applications with a focus on Spring Boot . API Integration: Build and integrate secure RESTful APIs to ensure seamless communication between systems. Code Quality: Write clean, efficient, and scalable code … requirements, architecture, and design. Performance Optimization: Ensure applications are optimized for speed, scalability, and high availability. Documentation: Maintain comprehensive technical and project documentation. Required Skills & Qualifications Strong expertise in Java and Spring Boot (hands-on, production experience required). Experience with Hibernate/JPA and relational databases (MySQL, Oracle, PostgreSQL). Strong knowledge of RESTful APIs, JSON, XML . Proficiency More ❯

Contract Java Developer (Inside IR35) | SC Cleared We are seeking a highly skilled Contract Java Developer with active SC Clearance to join a critical project on a long-term contract. This is a crucial role for a candidate who can hit the ground running and contribute to a significant public sector programme. Key Information IR35 Status: Inside IR35 Duration … to problem-solving. You will be working with a modern tech stack to deliver a new solution for a high-profile client. Required Skills & Experience Extensive commercial experience with Java 8+ . Proven expertise with RDBMS , specifically designing schemas and optimising complex SQL queries. Strong background in building and consuming RESTful APIs and microservices. Hands-on experience with Apache Kafka … for streaming data and event-driven systems. Experience with Spring Boot and cloud platforms (e.g., AWS, Azure) is highly desirable. If you are a talented Java contractor with the required clearance and are comfortable working inside IR35 via an umbrella company, please get in touch with your latest CV. More ❯