1 to 25 of 77 Java Jobs in the City of London

Java Technical Lead Location: London (Hybrid - 2 days on-site) Salary: Up to £110k + Benefits The Role We're looking for a Java Tech Lead to join a high-performing tech consultancy delivering complex, business-critical systems for enterprise and scale-up clients. You'll take technical ownership … hands-on leadership role combining architecture, engineering excellence, and people leadership in a modern, agile consultancy environment. Responsibilities Lead the design and development of Java-based systems across multiple client projects Set technical direction, standards, and best practices Act as a hands-on technical leader, contributing high-quality code Mentor ...

this post: 7+ years experience in software engineering and a solid understanding of the software development lifecycle (SDLC). Technical experience with OOAD, SOA, Java, J2EE, Spring, React.js, Node JS, Hibernate, SOAP/REST web services, Spring security, SpringBoot, and AMQP/RabbitMQ. Experience with application servers (Jboss/WebSphere ...

Position: Senior Java Microservices AWS developer Location: London, UK (2 days a week from office) 6 months contract position The Role As Senior Java Microservices AWS developer with a strong hands-on experience, you will design and develop scalable, cloud-native web applications using Java and AWS Serverless architecture Model. … Your responsibilities: Design and develop web applications using Java (latest versions), Spring Boot, and AWS technologies. Architect and implement RESTful APIs for distributed enterprise-grade systems. Develop robust, scalable, and high-performance microservices leveraging Spring Boot and modern design patterns. Integrate and manage AWS services such as EC2, S3, Lambda ...

Looking For 4+ years of hands-on experience building backend systems in a production environment. Strong experience with backend languages and frameworks (e.g., Java, Spring, Python, Go, Node.js — adaptable to your stack). Proven track record designing and implementing RESTful APIs and microservices. Solid understanding of databases (SQL and NoSQL ...

Professional knowledge and experience Essential: Significant hands-on experience as a Senior, Lead, or Principal Engineer in modern full-stack environments (e.g., .NET, React, Java, Python). Proven track record of scaling teams and making high-quality technical hiring decisions. Deep knowledge of software architecture, clean code principles, and maintainable ...

Your responsibilities: Design and develop web applications using Java (latest versions), Spring Boot, and AWS technologies. Architect and implement RESTful APIs for distributed enterprise-grade systems. Develop robust, scalable, and high-performance microservices leveraging Spring Boot and modern design patterns. Integrate and manage AWS services such as EC2, S3, Lambda … code reviews, and take full ownership of feature development from design to production. Essential skills/knowledge/experience: Minimum 10 years of experience Java application development Strong hands-on expertise in Java 11+ (preferably Java 17 or latest) Proficiency in Spring Boot, Microservices architecture, and Core Spring Experience with ...

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 ...

Senior Full-Stack Engineer (Java & Python) We are seeking a high-impact Senior Full-Stack Engineer to join a growing technology team for a leading investment house supporting market data services within a regulated, enterprise environment. This role sits at the intersection of data engineering, full-stack development, and business … MUST have 5+ years experience in data or software engineering within financial services or a similar regulated industry. Strong full-stack experience with Python , Java (Spring Boot) , React , SQL, and relational databases. Hands-on experience with modern data engineering tools (e.g. Airflow, Spark, Kafka, dbt, Snowflake or similar). Experience ...

landscape: CVEs, CWEs, common software vulnerability types SAST, SCA, and DAST, including the strengths and weaknesses of each At least one programming language (e.g. Java, Go) At least one major cloud provider (e.g. AWS, GCP, Azure) REST API design HTTP Authentication Linux at the terminal, including scripting and automation (e.g. ...

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 ...

organization. Mandatory Skills & Experience • Experience: 8+ years in cloud and AI architecture design, 5+ years in software development. • Technologies: Proficiency in Python, Java (and/or Golang), and Spring; expertise in AWS, Azure, Google Cloud; Kubernetes and containerization. • AI Expertise: Advanced machine learning algorithms, GenAI models (e.g., GPT, BERT, DALL ...

8+ years of industry experience with a solid understanding of engineering, infrastructure and ML best practices. Strong coding skills with Go or JAVA Design and help develop systems that serve recommendations to over 300 million users Drive engineering roadmap creation and execution, specifically around feed ranking and recall oriented candidate ...

clearance required Key skills : Write test scripts Proven experience as a Test Engineer, QA Engineer, or similar role Strong scripting or programming skills (e.g. Java, Python, JavaScript, C#, or similar) Hands-on experience with test automation tools/frameworks (e.g. Selenium, Cypress, Playwright, REST Assured, pytest, etc.) Experience testing APIs ...

/or multi-cloud set up is essential. Demonstrable basic development or scripting experience in one or more of the following languages: Bash, Python, Java, C#, Rust, Excel VBA Good Linux/network stack knowledge, as well as optimization/tuning Nice to have: Containerization (Docker/Kubernetes ...

message-driven architectures, including Kafka, JMS, or MQ-based Middleware. Proficiency with SQL for trade/order data analysis and reconciliation. Exposure to Java/Python for Scripting, debugging, or developing integration utilities. Familiarity with AWS or hybrid cloud environments, including basic knowledge of ECS/EKS or containerized deployment ...

experience delivering complex software in modern stacks Excellent problem-solving skills and ability to own projects Strong TypeScript + a backend language (Python/Java/C++/C#) Startup/scale-up experience; financial markets knowledge a plus What's in it for you: Competitive salary, to £100k + ...

look outside of this. They are; Have studied Computer Science or Maths at a Top University Have strong OOP – language is not important; Python, Java, C++/C#. Strong problem-solving capability Some SQL experience Have had internship or placement experience (non-negotiable) Salary range is £45K-£55K + bonus ...

analytics and evaluate applicability to the firm's operations. IT Applications Manager/Applications Manager Knowledge, Sills and Experience: * Proficient in SQL, C#, Python, Java, HTML/CSS, and related development frameworks. * Understanding of API integration, data modelling, and application performance tuning. * Strong project management skills are essential for implementing ...

translate theoretical strategies into production-grade code. What You'll Have Polyglot Mastery: Exceptional command of at least one major systems language ( C++ , Rust , Java ) for low-latency components, or Python for data and ML workflows. Distributed Systems Expertise: Deep experience building high-throughput, fault-tolerant systems using modern messaging ...

Java Developer/Software Engineer (Spring Boot AWS) London/WFH to £90k Are you a backend focussed Java technologist who enjoys building systems from scratch? You could be progressing your career at a global, prime broker that is replacing the legacy infrastructure used across capital markets with … designed for today's complex global markets. The company is experiencing great success in the US and is expanding into the UK. As a Java Developer you will join a small team responsible for building a brand new Futures Trading platform for the UK, primarily using Java with a focus ...

development experience. AI/ML Focus : Experience with Large Language Models ( LLMs ), agentic development, Vertex AI , and vector databases (semantic search). Additional Skills : Java, Kotlin, and Go are 'nice-to-have' but not mandatory. Randstad Technologies is acting as an Employment Business in relation to this vacancy. ...

coverage including unit, integration and E2E tests What You need: Significant experience building high-throughput, scalable systems Deep expertise in either Go, Node or Java, writing clean and maintainable production-grade code Strong understanding of performance optimisation, observability and reliability best practices Excellent communication skills and the ability to convey ...

responsiveness Confident working directly with front-office stakeholders Bachelor's degree in Computer Science, Engineering, or related discipline Desirable Backend experience in Java or C# Experience working in electronic FX, market making, or algo trading Familiarity with AI-assisted development tools while maintaining engineering standards Strong attention to detail ...

mandates, ECB/TARGET services updates, ISO 20022 migration, and AML/CTF regulations. Proficiency in API Design, microservices, and integration platforms. Modernprogramming languages (Java, .NET, Python, JavaScript frameworks) What you'll get in return An exciting opportunity to join an international organisation working with a major financial services organisation. ...

orchestration, consumption) Cloud platform experience (AWS, Azure or GCP) Strategic architecture capability including roadmaps, trade-offs, and risk management Strong programming skills in Python, Java or Scala Demonstrated experience managing and developing technical teams Desirable Data governance, lineage, provenance, and master data management Technology evaluation and product selection Event-driven ...