Top Java Developer Jobs

Design, build, and maintain scalable backend services using Java and Spring Boot; implement event-driven architectures with Kafka (producer/consumer and stream processing); design and optimize caching with Redis and in-memory strategies; perform performance tuning and debugging; take end-to-end ownership of components; ensure code quality and collaborate with cross-functional teams in a fast-paced environment.

Design, build, and maintain scalable, high-concurrency backend systems for a decentralized wallet. Develop distributed services, optimize JVM/multi-threading performance, integrate APIs and messaging systems, collaborate on architecture, and explore AI/LLM solutions.

Early-career Java engineer to develop and maintain core products, document business module interfaces, troubleshoot QA-reported issues, and assist customer support in resolving and classifying problems for system improvements.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Design, build, and maintain high-performance Java systems; develop DeFi adapter contracts and perform on-chain contract analysis; integrate AI-assisted tools to accelerate development; collaborate on architecture and apply emerging technologies to improve reliability and efficiency.

Senior full‑stack engineer to design, build, and support risk and analytics applications using Java, Python, Angular and cloud platforms (primarily Azure). Drive API‑first solutions, data processing, reactive architectures, and DevOps/CI‑CD practices. Collaborate with front/middle/back‑office and risk stakeholders, apply AI‑assisted development, and own end‑to‑end delivery.

Design, build, and optimize Windchill Java customizations (services, listeners, processors, TAM types, JSP/HTML UI). Lead migrations, troubleshoot production issues, document architecture, and mentor engineers while ensuring upgrade-friendly, high-performance PTC customizations.

Design and implement advanced Windchill Java customizations (services, listeners, processors, JSP/HTML UI), extend data model via TAM, develop background processes and workflows, optimize performance, migrate legacy customizations, support upgrades and post-go-live operations, maintain documentation, and mentor junior engineers.

Develop and maintain Java/J2EE applications using the Spring ecosystem. Build REST and SOAP web services, implement thread-safe concurrent code, integrate messaging systems (Kafka/ActiveMQ), work with RDBMS (Oracle/Postgres/SQL Server), and use development tools and application servers (Eclipse, Git, Gradle, Jenkins, Tomcat, JBoss).

Design, develop, and maintain Java/J2EE applications using Spring (Boot, MVC, Data, Security). Build REST and SOAP services, implement thread-safe concurrent code, integrate messaging (Kafka/ActiveMQ), work with RDBMS (Oracle/Postgres/SQL Server), use dev tools (Eclipse, Git, Gradle, Jenkins, Sonar, Jira, Artifactory) and deploy to app servers (Tomcat/Jetty/JBoss).

Lead design and delivery of scalable, secure Java APIs and microservices. Mentor backend developers, define technical solutions, own API lifecycle, integrate databases and third-party systems, ensure high availability and CI/CD, and drive performance, reliability, and technical innovation.

Design, build, test, and maintain Java Spring Boot microservices. Collaborate with architects, front-end developers, and product owners to define APIs, translate requirements, write automated tests, debug and optimize performance, participate in Agile ceremonies, perform code reviews, and maintain technical documentation.

Design, develop, and deliver new Java/Spring features and modules. Write unit and integration tests, investigate technical solutions, review requirements and documentation, participate in code reviews, and collaborate closely with developers and QA to ensure high-quality releases.

Design, build, and maintain server-side Java applications and RESTful APIs. Optimize performance and scalability, ensure security, collaborate with cross-functional teams, perform code reviews, troubleshoot production issues, and document system architecture.

Reverse-engineer TIBCO BW/MFT processes to extract business logic, then design and implement a modular Java/Spring Boot microservices replacement. Migrate protocols to Kafka/RabbitMQ/REST, translate XML transformations, ensure data persistence and consistency, and validate performance to meet existing SLAs.

Design, build, and maintain Java/J2EE multi-layer applications and APIs. Collaborate with architects and DevOps to implement CI/CD, code quality, testing, and database solutions (DB2/Oracle, PL/SQL). Support cross-team delivery, resolve technical roadblocks, and drive process improvements in an asset management/financial services context.

Analyze legacy TIBCO BusinessWorks/MFT processes to extract business logic, design and build a decoupled Java/Spring Boot microservices platform, migrate protocols to Kafka/RabbitMQ/REST, translate XML-heavy transformations to modern formats, and validate performance and SLAs to match legacy throughput.

Design, build, and maintain Java Spring Boot microservices and APIs. Write scalable, testable code and automated tests, troubleshoot and optimize performance, collaborate with architects, front-end, and product owners, participate in Agile ceremonies, perform code reviews, and maintain documentation.

Design, develop, test, and implement full-stack solutions for OTC derivatives in Markets Technology. Lead feasibility studies, estimations, and software development lifecycle activities. Build RESTful APIs, follow TDD and clean code principles, provide user support, coach junior analysts, and ensure compliance, security, and operational standards.

Design, develop, test and implement full‑stack Java applications for OTC derivatives. Perform feasibility studies, estimate effort, build RESTful APIs (Spring), follow TDD/clean code, support users, coach junior analysts, and ensure security and regulatory compliance.

Develop and maintain Java-based trading tools embedded on the trading floor. Collaborate with traders, quants, and product developers to build portfolio pricing and risk analysis systems, prioritize stability and maintainability, and iterate on revenue- and risk-focused features.

Lead and mentor a team building cloud-native, low-latency microservices and full-stack systems using Java/Go/AWS/Angular. Drive technical modernization, collaborate with product managers, ensure regulatory compliance, and occasionally code or evaluate implementations.

Design and develop software solutions, provide support throughout the software development life cycle, and lead project team efforts to deliver enterprise applications.

The Full Stack Java Developer will design, develop, and maintain enterprise-class applications, focusing on secure and scalable web services for client-facing applications, especially in HHS programs.

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