Senior Java Developer

Licensed sponsor London Contract Posted 1 week ago

Job Role: Senior Java Developer

Job Location: London, UK

Experience: Mid-Senior Level

Work Type: Hybrid / Open for full-time & Contract

About Company

At Synechron, we believe in the power of digital to transform businesses for the better. Our global consulting firm combines creativity and innovative technology to deliver industry-leading digital solutions. Synechron’s progressive technologies and optimization strategies span end-to-end Artificial Intelligence, Consulting, Digital, Cloud & DevOps, Data, and Software Engineering, servicing an array of noteworthy financial services and technology firms. Through research and development initiatives in our FinLabs we develop solutions for modernization, from Artificial Intelligence and Blockchain to Data Science models, Digital Underwriting, mobile-first applications and more. Over the last 20+ years, our company has been honored with multiple employer awards, recognizing our commitment to our talented teams. With top clients to boast about, Synechron has a global workforce of 14,700+ and has 55 offices in 20 countries within key global markets. For more information on the company, please visit our website or LinkedIn community.

Diversity, Equity, and Inclusion

Diversity & Inclusion are fundamental to our culture, and Synechron is proud to be an equal opportunity workplace and an affirmative-action employer. Our Diversity, Equity, and Inclusion (DEI) initiative ‘Same Difference’ is committed to fostering an inclusive culture – promoting equality, diversity and an environment that is respectful to all. We strongly believe that a diverse workforce helps build stronger, successful businesses as a global company. We encourage applicants from across diverse backgrounds, race, ethnicities, religion, age, marital status, gender, sexual orientations, or disabilities to apply. We empower our global workforce by offering flexible workplace arrangements, mentoring, internal mobility, learning and development programs, and more.

All employment decisions at Synechron are based on business needs, job requirements and individual qualifications, without regard to the applicant’s gender, gender identity, sexual orientation, race, ethnicity, disabled or veteran status, or any other characteristic protected by law.

Job Summary

We are seeking an experienced Senior Java Developer to join a technology team supporting a Client in London. The successful candidate will be responsible for designing, developing, and maintaining high-quality, scalable software solutions within a regulated financial-services environment.

This role requires strong hands-on expertise in Java development, distributed systems, software architecture, and modern engineering practices. The ideal candidate will have experience working in complex enterprise environments and collaborating effectively with business stakeholders, architects, developers, testers, and support teams.

Key Responsibilities

Design, develop, test, and maintain robust Java applications and services.
Contribute to the full software development lifecycle, from requirements analysis through deployment and production support.
Develop scalable, high-performance, and secure applications using Java and related technologies.
Design and implement RESTful APIs and microservices.
Participate in technical design and architectural discussions.
Perform code reviews and promote clean code, reusable components, and engineering best practices.
Troubleshoot complex technical issues and provide effective production support.
Collaborate with cross-functional teams, including business analysts, QA engineers, DevOps engineers, and infrastructure teams.
Develop unit, integration, and automated tests to ensure application quality.
Support continuous integration and continuous delivery processes.
Contribute to application modernization, cloud adoption, and platform migration initiatives where applicable.
Prepare technical documentation and maintain appropriate development and operational records.
Ensure solutions comply with enterprise security, risk, audit, and regulatory requirements.
Mentor junior and mid-level developers and provide technical guidance to the wider team.

Required Skills and Experience

10+ years of professional software development experience, with significant hands-on experience in Java.
Strong expertise in Java 8 or later, including object-oriented programming, collections, concurrency, exception handling, and JVM fundamentals.
Experience with Spring Framework, particularly Spring Boot, Spring MVC, Spring Data, and Spring Security.
Strong knowledge of microservices architecture and distributed systems.
Experience designing and developing RESTful web services and APIs.
Solid understanding of SQL and relational databases such as Oracle, PostgreSQL, or SQL Server.
Experience with messaging technologies such as Kafka, RabbitMQ, IBM MQ, or similar.
Good knowledge of software design patterns, data structures, algorithms, and system design.
Experience with automated testing frameworks such as JUnit, Mockito, or Cucumber.
Experience using Git and modern build tools such as Maven or Gradle.
Familiarity with CI/CD tools and practices, such as Jenkins, GitLab CI, Azure DevOps, or similar.
Experience working in Agile delivery environments, including Scrum or Kanban.
Strong understanding of secure coding principles, SDLC controls, and production-quality engineering.
Excellent analytical, problem-solving, communication, and collaboration skills.

Desirable Skills

Previous experience in investment banking, capital markets, wealth management, or another regulated financial-services environment.
Experience with trading, risk management, reference data, market data, payments, or post-trade systems.
Knowledge of cloud platforms such as AWS, Microsoft Azure, or Google Cloud.
Experience with Docker, Kubernetes, OpenShift, or containerized deployments.
Familiarity with observability and monitoring tools such as Splunk, Grafana, Prometheus, or Dynatrace.
Experience with performance tuning, profiling, and high-volume transaction processing.
Knowledge of event-driven architecture and domain-driven design.
Experience working with low-latency or highly available systems.
Familiarity with infrastructure-as-code tools such as Terraform or Ansible.