26 to 50 of 296 Java Jobs in the City of London

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 ...

/or regulated environments. Hands-on experience across multiple NFT domains, including performance, scalability, resilience, failover, and disaster recovery. Strong understanding of distributed systems, Java-based microservices, and containerised architectures. Experience with performance testing and observability tools such as JMeter, LoadRunner, Grafana, Dynatrace, Splunk, or AppDynamics. Familiarity with CI/ ...

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 ...

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. ...

stack in low-trust, high-sensitivity environments Contribute to systems architecture, testing, integration, and deployment Ideal Background: Strong experience in modern programming languages ( Python, Java, Typescript, JavaScript) Familiarity with secure coding principles and systems engineering Experience with cloud platforms (AWS, Azure, GCP) and DevOps tooling is a bonus Comfortable working ...

financial platforms. Deeply skilled in software design and architecture, ideally across cloud-native environments (AWS preferred). Proficient in modern development frameworks, such as Java, Python, or Node.js , and familiar with microservices, APIs, and event-driven architectures. Experienced in cloud and infrastructure-as-code technologies, such as Terraform, Kubernetes, Docker ...

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 ...

Senior Java Engineer (Kubernetes, Kafka, Cloud) – Finance – London Daily rate: £500 - £700 (inside IR35) Duration: 12 months Hybrid: 8 days per month Start: ASAP A banking client of mine is looking for a Senior Java Engineer with Kafka and Docker skills to join the team on a freelance basis. … specifically looking for an individual with strong Core Java expertise, as this role primarily involves server-side development. Must be based in the UK and happy to be on site 8 days per month which is mandatory. Responsibilities & Duties Working as part of an Agile development team to deliver ...

financial platforms. Deeply skilled in software design and architecture, ideally across cloud-native environments (AWS preferred). Proficient in modern development frameworks, such as Java, Python, or Node.js , and familiar with microservices, APIs, and event-driven architectures. Experienced in cloud and infrastructure-as-code technologies, such as Terraform, Kubernetes, Docker ...

financial platforms. Deeply skilled in software design and architecture, ideally across cloud-native environments (AWS preferred). Proficient in modern development frameworks, such as Java, Python, or Node.js , and familiar with microservices, APIs, and event-driven architectures. Experienced in cloud and infrastructure-as-code technologies, such as Terraform, Kubernetes, Docker ...

/CD pipelines, containerization (Docker, Kubernetes), and infrastructure as code (Terraform). Programming: Advanced skills in Python and familiarity with other languages (e.g., R, Java). Academic Background: Degree in Computer Science, Data Science, or related discipline (Master’s or PhD preferred). Preferred Qualifications: Experience with large-scale data ...

iteration & prototyping using AI tools such as Lovable, Bolt, or Cursor as a collaborator. Nice to Have: Some experience in backend development (Python/Java/Go) Experience with container orchestration and service containerisation (Kubernetes, Docker) Worked in an IoT or Edge-oriented architectures Experience or knowledge in retail ...

future reference. Required Skills Expertise in Google Apigee (Edge, Hybrid, OPDK, Apigee X) Strong knowledge of API Gateway, Microservices, Spring Boot, Spring Cloud, Java Experience with Anthos Service Mesh, CI/CD pipelines, Docker/Kubernetes, and DevOps practices Familiarity with API security standards, OAuth, JWT, SAML, and performance optimisation ...

scikit-learn, and visualisation tools. Experience building production-quality code and deploying models is important. Familiarity with SQL and relational databases required. Experience with Java, Kotlin, or Rust is beneficial Data Science: Solid grounding in statistical analysis, machine learning, and predictive modelling. Experience working with large-scale, time-series ...

development, and Cloud Deployment. Proficiency in Guidewire Edge APIs, Integration Gateway, GX Models, Messaging Frameworks, and Guidewire Cloud Platform. Hands-on experience with Java, Gosu, Spring Boot, Node.js, Python, and API development. Experience integrating risk assessment tools, actuarial models, and catastrophe risk platforms. Knowledge of API management platforms and middleware ...

Azure, AWS, GCP, OpenShift) Infrastructure-as-Code (Terraform, Ansible, Crossplane) Container orchestration, networking, and automation (Kubernetes, Docker) Scripting (Bash, Powershell, Python) Programming languages (Golang, Java, Ruby, Python) Vulnerability remediation and mitigation tools (BlackDuck, Snyk) We value your ability to adapt over deep specialization. In addition, we're currently seeking folks ...

Clearance Required: ACTIVE DV Clearance Your role You will be a hands-on technical expert helping us deliver projects in a true DevOps manner. You will apply a software engineering mindset to problems, whether that ...

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 ...

Senior Java Backend Engineer Location: Hybrid – London Job Type: Permanent | Full-Time Salary: £80,000 – £95,000 + Benefits We’re supporting a fast-scaling UK digital banking platform as they continue strengthening the systems that power millions of daily transactions. They’re now looking for a Senior Backend Engineer … with strong Java engineering experience and a passion for building reliable, distributed systems at scale. This role is ideal for someone who enjoys working on event-driven, distributed architectures, values thoughtful system design, and wants to deliver high-impact backend work at scale. Key Responsibilities Design and build backend services ...

Java/Kotlin Engineer Join one of the UK’s fastest-growing challenger banks as we continue to redefine what modern banking looks like. We’re building secure, scalable, and intuitive financial products — and we’re looking for talented Java/Kotlin Engineers to help us shape the future. About … days per week in our London office to collaborate closely with engineers, product managers, and designers. What You’ll Do Develop scalable microservices using Java and/or Kotlin Design APIs and build integrations across our core financial systems Work with event-driven architectures (Kafka or similar) Write clean, testable ...

engineer to design, implement and maintain the infrastructure, tools and processes that enable rapid development and high-quality software development. Tech Stack Required: Kafka Java docker Spring (framework boot, Data) K8 Helm React Typescript/JavaScript Postgres Open Search/ElasticSearch Playwright Wiremock Grafana Prometheus Dynatrace Git NodeJS Rest ...

grade standards What You’ll Need Significant experience building and maintaining production systems (8+ years) Deep knowledge of an object-oriented language ( C# or Java ) and strong Python experience Experience working with cloud infrastructure (AWS preferred) Comfort designing scalable systems and making architectural trade-offs Financial markets experience is beneficial ...