Top Senior Java Developer Jobs

Lead the design, development, testing, and delivery of complex Java software solutions for government and national security customers. Build RESTful microservices, collaborate on frontend and backend systems, establish quality standards, conduct code reviews, explore new technologies, and mentor junior engineers. The role involves technical leadership, Agile delivery, DevOps, cloud infrastructure, and working onsite at client locations three to four days per week after obtaining security clearance.

Develop and lead Java backend engineering for a high-volume margin calculation platform. Responsibilities include technical design, performance optimization, concurrent and distributed processing, batch and event-driven workflows, testing, production support, monitoring, resiliency, and root-cause analysis. The role translates complex financial requirements into reliable software, mentors engineers, establishes development standards, and partners with global technology, risk, operations, and business teams.

Develop and lead Java backend development for a high-volume margin calculation platform. Responsibilities include technical design, performance optimization, batch and event-driven processing, testing, production support, resiliency improvements, code reviews, mentoring, and stakeholder collaboration. The role translates complex financial requirements into secure, scalable solutions while supporting risk management and regulatory controls.

Leads the design, development, testing, and maintenance of enterprise full-stack Java applications. Builds Spring Boot services, REST and SOAP integrations, relational database components, and React-based interfaces. Coordinates on-site stakeholders and offshore engineering teams, aligns sprint delivery, conducts code reviews, manages CI/CD and source control workflows, and troubleshoots production issues across time zones.

Design, develop, and deploy cloud-hosted distributed applications supporting scientific research publishing. Collaborate with stakeholders and Agile, DevOps, and cross-functional teams; contribute to architecture, performance, stability, and delivery improvements. Apply full-stack Java and JavaScript/TypeScript development, testing, monitoring, documentation, and cloud technologies. Mentor team members, promote engineering best practices, and help explore AI-based solutions.

Designs, builds, and operates scalable backend services supporting PayPal’s global credit products. The role develops RESTful APIs, event-driven asynchronous systems, and configuration-driven platforms using Java and cloud technologies. Responsibilities include improving scalability, reliability, performance, observability, and security; translating product, risk, and regulatory requirements into technical solutions; contributing to architecture and design reviews; mentoring junior engineers; and delivering solutions across the full software development lifecycle.

Design, develop, and deploy cloud-hosted applications supporting scientific research publication. Collaborate with stakeholders and Agile, DevOps, and cross-functional teams; contribute to architecture, performance, monitoring, testing, documentation, and delivery improvements. Mentor team members, apply industry best practices, support continuous improvement, and develop solutions using Java, Spring, JavaScript or TypeScript frameworks, cloud technologies, CI/CD tools, and emerging AI capabilities.

Design and develop scalable full-stack banking applications, with a 70/30 focus on Java backend engineering and Angular frontend development. Build microservices, APIs, and production-ready systems using Spring Boot, Kafka, GraphQL, and NoSQL technologies. Apply DevSecOps, SRE, security, testing, and CI/CD practices; assess architecture and technical risks; collaborate with stakeholders; and mentor engineers through code, design, and documentation reviews.

Senior Java developer responsible for designing, developing, testing, and supporting applications on the Institutional Data Platform. Participate in feasibility, estimates, design, implementation, and post-implementation reviews. Mentor junior analysts, collaborate with stakeholders and tech teams, ensure security and compliance, and contribute to architecture, APIs, database interactions, and production support.

Develop, analyze, design, test, and implement enterprise Java/J2EE web applications and REST services. Support SDLC activities, mentor junior analysts, ensure code quality and security, work with microservices and databases, and collaborate with stakeholders to deliver reliable production applications.

Leads enterprise technical strategy and roadmap execution while designing, building, and enhancing scalable software systems. Provides technical leadership across engineering teams, drives architecture and cloud adoption, ensures solution quality and performance, mentors engineers, and improves development practices. The role requires deep Java and software architecture expertise, experience with microservices, DevOps, Azure, cloud infrastructure, security protocols, monitoring, and large-scale system design.

Design, build, and operate secure, scalable Java microservices for a high-traffic consumer platform. Develop production LLM features using RAG, agentic workflows, and tool-use patterns. Lead design discussions and code reviews, improve quality and testing, partner with product, security, and platform teams, and resolve performance and scalability issues. Deploy and operate services on AWS using Docker and Kubernetes while applying event-driven architecture, CI/CD, infrastructure as code, and automated testing.

Designs, develops, tests, maintains, and troubleshoots Java software supporting NASIC mission systems. The role enhances applications with modern frameworks, resolves defects and performance issues, creates technical documentation, and collaborates with software, systems, network, and storage engineers across multiple secure environments. Work requires an active TS/SCI clearance, CI polygraph, SCIF access, and compliance with security procedures.

Design, build, and lead development of enterprise Java applications and RESTful APIs. Analyze complex systems, improve architecture, enforce engineering standards, and ensure secure, compliant solutions. Collaborate with technology and business teams, mentor developers, manage technical risks, and guide projects from planning through implementation in a global financial-services environment.

Provides technical leadership for designing, developing, modernizing, testing, and supporting enterprise applications. Leads full-stack Java, Spring Boot, Angular, and React engineering; architecture and code reviews; database and API design; automated testing; CI/CD and DevSecOps practices; production incident troubleshooting; observability; and root-cause analysis. Mentors engineers and collaborates across architecture, product, UX, QA, DevOps, database, and operations teams.

Leads the architecture, development, testing, deployment, and production support of scalable full-stack applications. Builds React and TypeScript frontends, backend APIs and microservices, and cloud-native AWS solutions. Drives system design, observability, security, performance, CI/CD, and automated testing while mentoring engineers and guiding architecture and code reviews. Collaborates with product, design, architecture, and business stakeholders to deliver enterprise-grade solutions and resolve complex production issues.

Leads the architecture, development, deployment, and support of scalable full-stack applications using React, TypeScript, backend services, cloud platforms, and distributed systems. Owns features end to end, drives technical design and code reviews, implements testing and observability strategies, resolves production issues, mentors engineers, and collaborates with product, architecture, design, and business stakeholders.

Lead design, development, and integration of backend systems for a large-scale video streaming platform. Build Java-based APIs and microservices, manage data and recommendation pipelines, handle video ingestion and metadata workflows, deploy services on cloud and Kubernetes, ensure performance, reliability, and test automation, and collaborate with product and operations teams to deliver scalable streaming solutions.

Design, build, and maintain scalable Java backend and microservices systems using Spring Boot. Develop and optimize Apache Spark data pipelines, databases, and secure REST APIs. Lead code reviews, enforce engineering standards, mentor developers, and collaborate with frontend, product, and DevOps teams. The role also involves performance optimization, cross-functional delivery, and ownership from concept through deployment.

Leads a team developing scalable Java software for counterparty credit risk management. Responsibilities include hands-on architecture and development, technical mentoring, code reviews, cloud-native and AI/ML adoption, project delivery, agile practices, stakeholder communication, and oversight of systems integrating trades, collateral, and market data.

Design, develop, and maintain secure, scalable Java backend services and APIs in distributed, microservices-based environments. Build event-driven processing, troubleshoot production issues, optimize performance, and support system reliability and observability. Collaborate with product, engineering, QA, and operations teams; contribute to architecture, coding standards, reviews, and Agile practices. Mentor developers and help ensure compliance with security, privacy, and industry standards while supporting global aviation customers.

Develop and operate low-latency Java connectivity platforms for equities electronic trading, including exchange and client connectivity, order management, algorithmic access, and direct market access. The role involves performance optimization, concurrency, high-throughput architecture, automated testing, monitoring, reconciliation, application recovery, stakeholder collaboration, project execution, and mentoring junior engineers.

Develop and support a mature Java court case management platform. Diagnose production issues across application, database, and integration layers; investigate ESB defects; work with XML/XSLT, JMS, SOAP, and REST services; collaborate on issue triage and documentation; and contribute to modernization from legacy Java frameworks toward Spring MVC and modern front-end technologies.

Diagnose and resolve complex production issues in a Java court case management platform. Responsibilities include debugging backend services, databases, ESB integrations, XML/XSLT transformations, JMS messaging, SOAP/REST services, and third-party e-filing systems. The engineer will collaborate on issue triage, document root-cause analyses, participate in code reviews, support legacy modernization toward Spring MVC and modern front-end frameworks, and maintain production system reliability.

Maintain and support Java-based healthcare SaaS applications across multiple customer environments. Responsibilities include bug fixes, feature delivery, refactoring, deployments, security remediation, SQL and data migrations, code reviews, configuration improvements, and production support. The role requires a generalist software engineer comfortable with Java, Angular, SQL, REST APIs, enterprise applications, and customer-facing environments.