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Senior Software Engineer - Java United Kingdom Jobs

151 Job Offers

Senior Software Engineer
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Join Barclays as a Senior Software Engineer in Knutsford/Manchester. Design and develop high-quality Java/Spring Boot APIs, re-architecting key systems. Collaborate in agile teams, championing best practices and secure coding. Enjoy benefits like private medical care and a competitive pension.
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United Kingdom , Knutsford; Manchester
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Barclays
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Senior Frontend Software Engineer
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Join Atlassian in London as a Senior Frontend Software Engineer. You will build and modernize frontend infrastructure using React, JavaScript (ES6), and modern testing frameworks. Drive complex projects, mentor junior engineers, and deliver impactful user experiences. Enjoy benefits including hea...
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United Kingdom , London
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Atlassian
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Senior Golang Software Engineer
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Join Citi's pioneering team in London as a Senior Golang Engineer. Lead the 0-1 build of innovative AI products and platforms, leveraging your expertise in Golang, large-scale ML systems, and MLOps. Enjoy a hybrid model, competitive salary, bonus, and comprehensive benefits while defining the fut...
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United Kingdom , London
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Citi
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Senior Software Supply Chain Security Engineer
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Join our London team as a Senior Software Supply Chain Security Engineer. You will design and implement secure, cloud-centric solutions using AWS, Kubernetes, and Terraform. Champion DevSecOps practices and integrate security into CI/CD pipelines within an inclusive, flexible culture. Drive engin...
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United Kingdom , London
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Citi
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Senior Software Engineer
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Join a Cambridge-based quantum computing leader as a Senior Software Engineer. Develop cutting-edge cloud infrastructure using Python, AWS/Azure, and Terraform. Enjoy flexible work, equity, and collaborate with world-class innovators on revolutionary quantum AI and cybersecurity platforms.
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United Kingdom , Cambridge
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Gitmax
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Senior Software Engineer
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Join our London team as a Senior Software Engineer. You will design technical architecture and lead complex projects in Scala/Python, shaping the SolstiCE platform. This role offers a bonus, private medical care, and 27 days' leave. Drive efficiency and automation for our Equity Derivatives busin...
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United Kingdom , London
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Citi
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Senior Full-Stack Software Engineer
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Join our London team as a Senior Full-Stack Engineer. Drive innovation using Go, Python, and React within a product-focused, agile environment. Enjoy a hybrid model, 27 days leave, bonus, and comprehensive benefits while revolutionizing controls management.
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United Kingdom , London
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Citi
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Senior Software Engineer - Build AI Tools
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Join Citi's new GenAI Security team in Belfast as a Senior Software Engineer. Design and build a scalable security platform to protect AI applications from adversarial attacks. Leverage your expertise in Python/Go and secure APIs within a collaborative, cutting-edge environment. This role offers ...
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United Kingdom , Belfast
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Citi
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Senior Software Engineer
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Join Equinox in London as a Senior Software Engineer. Lead complex projects, design system architectures, and mentor junior developers using Java and Kafka. Enjoy a hybrid model, bonus, private healthcare, and 27 days leave.
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United Kingdom , London
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Citi
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Senior Software Engineer
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Join Citi's Developer Enablement team in Belfast as a Senior Software Engineer. You will build internal platforms and tools using Java/Kotlin, microservices, and Kafka to improve the SDLC for thousands of engineers. We seek expertise in cloud-native tech, DevOps, and CI/CD. Enjoy excellent benefi...
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United Kingdom , Belfast
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Citi
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Senior Software Engineer
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Join Citi's XiP team in London as a Senior Software Engineer. Design and optimize the core distributed Risk Calculation Engine for global trading desks. Leverage your deep Java, Spring, and large-scale system expertise in a pivotal role. Enjoy global benefits supporting your well-being and profes...
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United Kingdom , London
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Citi
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Senior Software Engineer
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Join our London team as a Senior Full Stack Engineer. You will develop and maintain the global accesso Horizon platform using Java, JSP, and SQL. We seek 5+ years' experience with cloud scalability, unit testing, and Scrum. Enjoy flexible hours, virtual team events, and a commitment to diversity.
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United Kingdom , London
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accesso
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Senior Frontend Software Engineer
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Join Addepar's high-impact Partner Platform team in Edinburgh as a Senior Frontend Software Engineer. You'll architect scalable solutions on a data lakehouse, integrating diverse data sources and enabling powerful analytics. This role requires strong frontend skills, backend experience (Python/Ja...
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United Kingdom , Edinburgh
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Addepar
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Senior Software Engineer
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Join our In-Car Payments Engineering team in London as a Senior Software Engineer. You will build secure, cloud-based transaction systems using TypeScript, Node.js, and AWS serverless services. Your expertise in PCI DSS, API security, and Terraform will be key to delivering cutting-edge in-car co...
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United Kingdom , London
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Arrive
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Senior Software Engineer
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Join our London team as a Senior Software Engineer. You will develop scalable PHP/MySQL platforms and RESTful APIs on AWS, focusing on performance and security. We value expertise in modern CI/CD, software architecture, and mentoring. Enjoy a collaborative, supportive, and inclusive work environm...
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United Kingdom , London
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Arrive
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Senior Frontend Software Engineer
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Join Blis in Edinburgh as a Senior Frontend Engineer. You will build customer-facing web apps for complex ad campaigns using React, TypeScript, and modern tooling. Leverage 7+ years of experience to create beautiful data visualizations from geospatial and big data. This is a key role in a tech-fi...
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United Kingdom , Edinburgh
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Blis
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Senior Software Engineer
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Join Blockchain.com as a Senior Software Engineer in London. Build low-latency trading systems in RUST, focusing on OMS and exchange gateways. Leverage your Python, SQL, and trading systems expertise in a hybrid role with a "work from anywhere" policy, equity, and unlimited vacation.
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United Kingdom , London
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Blockchain
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Senior Software Engineer - Cloud Infrastructure
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Join ClickHouse Cloud as a Senior Software Engineer in London. Design and build robust, scalable cloud infrastructure using Go and Kubernetes on AWS/Azure/GCP. Enjoy a flexible remote role with equity, healthcare, and a home office stipend in a globally distributed team.
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United Kingdom , London
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ClickHouse
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Senior Software Engineer - Data Integration & JVM Ecosystem
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Join ClickHouse as a Senior Software Engineer, focusing on Data Integration and the JVM ecosystem. You will build and maintain critical connectors for tools like Kafka, Spark, and Flink, ensuring seamless data access. This remote UK role requires deep Java/JVM expertise and experience with scalab...
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United Kingdom
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ClickHouse
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Senior Software Engineer (Infrastructure) - HyperDX
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Join ClickHouse to revolutionize developer observability with HyperDX. As a Senior Infrastructure Engineer, you'll build scalable, cloud-native backend systems using TypeScript, Kubernetes, and ClickHouse. This remote UK role offers equity, healthcare, and a flexible work environment for experts ...
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United Kingdom
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ClickHouse
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About the Senior Software Engineer - Java role

Explore Senior Software Engineer - Java jobs and discover a pivotal career at the heart of modern technology. A Senior Software Engineer specializing in Java is a seasoned professional responsible for designing, developing, and maintaining robust, scalable, and high-performance software systems. This role transcends basic coding, involving deep architectural thinking and end-to-end ownership of complex applications. Professionals in these jobs are instrumental in transforming business requirements into technical solutions, ensuring system reliability, security, and efficiency.

Typical responsibilities for a Senior Java Engineer encompass the full software development lifecycle. They architect and implement backend services, microservices, and APIs, often using frameworks like Spring Boot. A core duty is designing scalable system architectures, making critical decisions on data storage with SQL (e.g., PostgreSQL) and NoSQL (e.g., MongoDB) databases. They write clean, maintainable, and well-tested code while enforcing best practices through code reviews. These engineers also optimize application performance, troubleshoot complex issues, and ensure seamless integration with front-end systems and third-party services. Furthermore, they frequently collaborate with cross-functional teams, including product managers, DevOps, and quality assurance, to deliver cohesive products. Leadership is a key aspect, as they mentor junior developers, lead technical discussions, and contribute to strategic planning.

The typical skill set required for Senior Software Engineer - Java jobs is comprehensive. A strong foundation in core Java, object-oriented design, and design patterns is essential. Proficiency with enterprise frameworks (Spring, Hibernate), RESTful API design, and microservices architecture is standard. Experience with cloud platforms (AWS, Azure, GCP) and containerization tools like Docker and Kubernetes is increasingly important. These roles demand expertise in build tools (Maven, Gradle), version control (Git), and CI/CD pipelines. Beyond technical acumen, successful candidates possess strong problem-solving abilities, excellent communication skills for articulating technical concepts, and a proactive approach to learning new technologies. A bachelor’s degree in computer science or a related field, coupled with 5+ years of progressive development experience, is commonly expected.

Ultimately, Senior Software Engineer - Java jobs are for those who thrive on technical challenges and leadership. It is a career path defined by building foundational business logic, driving innovation, and ensuring the technical excellence of software products that power organizations worldwide.