Top Java Developer Jobs

Design, develop, troubleshoot, and debug software for databases, applications, tools, and networks using C++ and Java. Contribute to software architecture changes, work on mission-critical large-scale systems, and implement concurrent and parallel distributed algorithms in cloud environments while providing strong troubleshooting for distributed systems.

Lead and mentor a team of Java/J2EE developers to enhance and maintain Internet/Intranet business applications. Provide design and implementation leadership using WebSphere and JBoss, refine Java/J2EE standards and testing, implement integrations and packaged solutions, and collaborate with technical staff and business stakeholders to gather requirements and resolve issues.

Lead design and development of low-latency, high-performance Java microservices for electronic equities trading. Implement complex trading logic, optimize performance, conduct design reviews, partner with product and quant teams, improve testing and CI/CD pipelines, and maintain monitoring, reconciliation, and recovery capabilities while ensuring regulatory and operational risk controls.

Develop and maintain the Java client library and high-performance C/C++ server applications. Implement message parsers and feed handlers, optimize for extreme throughput and low latency, build tools for petabyte-scale processing, collaborate on build/deploy/CI practices, monitor uptime, and support smooth feature rollouts.

Develop and maintain core Elasticsearch infrastructure and shared platform features. Design scalable APIs, solve performance and concurrency issues, improve observability and CI/CD, automate developer workflows, lead cross-team projects, support complex operational investigations, and use AI to accelerate development and debugging.

Design, build, and improve Elasticsearch distributed-systems components for scalable, concurrent, and consistent indexing. Maintain cluster coordination for performance and resilience, push system scale limits, investigate performance and concurrency issues, support operations/support engineers, and lead projects involving multiple engineers from design through delivery.

The role involves improving Elasticsearch's distributed components, maintaining cluster coordination systems, and addressing complex issues to optimize performance and scalability.

Lead design and development of enterprise software solutions using Java and Cursor AI. Provide technical leadership, mentor engineers, define architecture and roadmaps, implement cloud-native, microservices, CI/CD and infrastructure-as-code practices, and collaborate across product and engineering teams to deliver performant, secure systems.

Build, integrate, and stress-test full-stack applications and backend services that leverage advanced AI models. Develop production APIs, front-end features, databases, and cloud infrastructure; troubleshoot integrations; prototype rapidly and deliver high-quality code and documentation in fast-moving environments.

Lead design and delivery of custom cloud-based software solutions. Implement and mentor teams on Java web services and Spring Boot applications, leverage cloud platforms (AWS/GCP/Azure), ontology and semantic search, NoSQL/graph databases (MongoDB/Neo4J), ORM (Hibernate), build and CI tools (Maven, Jenkins/TeamCity), and TDD/BDD practices.

Lead development of cloud-based custom software using Java and modern web frameworks. Provide technical leadership, drive TDD/BDD practices, design web services, use CI/CD, containers, NoSQL, and ORM technologies to deliver automated cloud solutions for clients.

Lead design and delivery of custom cloud-native Java applications and services. Provide technical leadership, build indexed searchable interfaces for media assets, implement containerized solutions, and apply CI/CD, TDD/BDD, and cloud infrastructure automation practices to meet client requirements.

Develop and deliver cloud-based custom software and Java web services using TDD/BDD practices. Work with containers, ORM, modern build and CI tools, and web frameworks (Spring Boot) on collaborative teams to implement Continuous Delivery solutions for clients.

Design and develop frontend screens with jQuery/HTML/CSS (and Angular JS), build and test Spring Boot microservices, implement REST/SOAP APIs, participate in architecture and code reviews, mentor junior developers, and contribute to agile delivery and technical improvements.

The role involves designing and implementing software solutions for regulatory reporting, collaborating with stakeholders, and mentoring junior team members in a hands-on capacity.

Develop and maintain Java applications for DoD systems, focusing on backend services, REST APIs, and microservices, while ensuring security and performance.

Maintain and enhance backend order management and next‑gen trading platform components. Design, develop, optimize and test scalable low‑latency Java services, collaborate with product, architects and cross‑functional teams, ensure alignment with business goals, and mentor peers while following engineering best practices.

The Sr Software Developer will design, develop, and mentor direct reports in software for the real estate industry, solving complex problems and ensuring product functionality and performance.

Senior full-stack developer responsible for designing and implementing Java/Spring back-end APIs, React/TypeScript front-ends, and normalized PostgreSQL schemas. Duties include data migration, CI/CD and deployments, ensuring security and 508 accessibility, supporting lifecycle phases, and using AWS, Keycloak, Kubernetes, Docker, and Atlassian tools. Requires strong documentation, Agile experience, and 7+ years of experience.

The Software Engineer will design and implement customer-facing software, focusing on security and cloud solutions, while collaborating with cross-functional teams.

Design, code, test, and maintain web-based, data-driven Java applications. Translate requirements into technical designs, perform QA and performance tuning, troubleshoot and modify existing applications, provide technical leadership, and produce system documentation and operational guides.

Develop backend services for AI applications, focusing on software design, documentation, and code reviews. Requires proficiency in Scala and cloud environments.

The Staff Engineer will leverage over 5 years of experience in Java, JavaScript, and frameworks to develop robust solutions, mentor teammates, and enhance client outcomes while utilizing agile methodologies and cloud development tools.

Seeking a Staff Engineer with 5+ years in Java, focusing on mentoring teammates, solving client challenges, and conducting cloud development.

On-site Mid/Senior backend developer to manage CI/CD/Kubernetes, develop CCDI backend services, handle database integration/migration (PG, Oracle, MongoDB, Redis), implement Kafka event streaming, support Informatica/EAI migrations, provide production on-call support, perform system monitoring, incident response, and code review. Bilingual Korean/English required.