Top Senior Java Developer Jobs

Leads the design, development, testing, and maintenance of full-stack applications using Java, Spring, React, databases, and APIs. Owns medium- to large-scale features through production, contributes to architecture, reviews code and designs, and improves observability, performance, reliability, and resiliency. Participates in incident response and root-cause analysis while mentoring engineers and collaborating across Product, Design, QA, and engineering teams.

Develop and maintain scalable Java and Spring Boot backend applications, microservices, and RESTful APIs. Responsibilities include database integration, code reviews, performance optimization, production troubleshooting, testing, CI/CD, cloud deployment, and collaboration with product, QA, and DevOps teams.

Design, develop, and maintain Java enterprise applications, scalable microservices, REST APIs, and modern Angular or React interfaces. Collaborate with stakeholders, participate in Agile ceremonies and code reviews, support production deployments, resolve issues, and contribute to high-performance technical solutions.

Designs, develops, tests, deploys, and supports scalable full-stack enterprise applications for Fidelity’s retirement platforms. Builds RESTful APIs and transactional systems using C#, .NET, and Java; develops cloud-neutral, containerized services; participates in architecture and code reviews; modernizes legacy systems; supports production releases; and mentors junior developers within Agile Scrum teams.

Build and maintain scalable Java backend services for internal platforms, integrating with Salesforce and other distributed systems. Design APIs, data flows, and event-driven architectures; write tested, maintainable code; troubleshoot complex integrations; and improve reliability, observability, performance, and CI/CD practices. Contribute to internal web applications and Salesforce development as needed. Collaborate with engineers, product managers, technical program managers, and business teams in an agile environment. This is a US-based remote role.

Designs, develops, integrates, tests, deploys, and maintains enterprise web applications using Java and Angular. Translates complex requirements into scalable solutions, develops APIs and database interfaces, supports the full software development lifecycle, and troubleshoots Linux-based applications. Participates in Agile/Scrum activities, automated CI/CD, DevOps practices, peer reviews, documentation, and stakeholder collaboration. The role supports an Intelligence Community customer and requires an active TS/SCI clearance with polygraph.

Develop and deploy Java-based analytic software supporting target discovery and mission analytics. Collaborate with analysts and stakeholders to translate mission needs into automated workflows, rapidly prototype solutions, evaluate and integrate analytic capabilities, and support software through testing, documentation, operational deployment, and sustainment. Work within approved cloud architectures and perform design reviews, configuration management, unit testing, integration testing, debugging, and performance evaluation.

Develop, test, deploy, and maintain enterprise Java applications using Spring and related technologies. Conduct code reviews, optimize application performance, contribute to architecture and project planning, and mentor developers. Collaborate across development teams to maintain consistent processes and deliver projects on time. The role requires extensive full-stack Java experience, REST and microservices expertise, database and version-control knowledge, and familiarity with CI/CD, caching, service discovery, and Agile methodologies.

Develop and sustain front-end interfaces for intelligence reporting and geospatial collaboration tools. Responsibilities include enhancing Section 508 accessibility, redeveloping user interfaces, integrating and troubleshooting application interfaces, and performing software development, testing, maintenance, and problem resolution using Java, GWT, PrimeFaces, Quarkus, HTML, CSS, and JavaScript.

Develop and sustain a high-performance geospatial collaboration and intelligence reporting tool. Responsibilities include implementing mission-driven enhancements, maintaining existing code, troubleshooting application interfaces, testing, integration, and resolving production issues. The developer will work with Java, C/C++, scripting languages, databases, search platforms, REST services, and Linux. Participation in a rotating pager schedule is required for emergency 24/7 support.

Develop and maintain scalable full-stack applications using Java, Spring Boot, Angular, REST APIs, and microservices. Build responsive Angular interfaces, troubleshoot production issues, optimize performance, participate in technical design and code reviews, and follow testing and CI/CD practices. The role requires payment application and prior IBX experience, plus hands-on use of AI-assisted development tools such as GitLab Duo and Gemini. This is an onsite senior position in Cleveland, Ohio.

Develop and maintain Linux-based tools and services supporting products including GitLab, Artifactory, MinIO, Jupyter, and SPARTANDESK. Build Java applications and Bash, Python, and PHP automation scripts; implement infrastructure as code with Ansible; manage CI/CD pipelines, Docker containers, Git workflows, and system documentation. Collaborate with developers, administrators, project managers, and mission customers to deliver integrations and sustain mission applications.

Develop and support software solutions for national security missions. Responsibilities include Java software engineering, requirements gathering, workflow documentation, problem solving, and collaboration using Confluence and Jira. Preferred experience includes AWS, Maven, Git/GitLab, MapReduce, JUnit, Python, Linux, streaming capabilities, and AI. The role requires a current Top Secret/SCI clearance with favorable polygraph and U.S. citizenship.

Develop and maintain software solutions supporting national security missions. The engineer will assist with daily software engineering responsibilities and contribute to timely, innovative solutions using Python, Kotlin, Java, Terraform, Elasticsearch/OpenSearch, and AWS. The role requires substantial experience on comparable programs, a relevant bachelor's degree or equivalent experience, and an active Top Secret/SCI clearance with a favorable polygraph.

Develop and maintain scalable Java and Spring Boot backend applications and REST APIs. Optimize CPU, memory, and overall application performance; identify bottlenecks; resolve production issues; and contribute to architecture, code reviews, reliability, and scalability. The role also involves Node.js or Python FastAPI services, cross-functional collaboration, and potential work with GraphQL, generative AI, cloud platforms, containers, CI/CD, and monitoring tools.

Develop and support enterprise full-stack applications using Java, Spring Boot, React, PostgreSQL, and REST APIs. Design secure UIs, database schemas, integrations, and data migrations; manage deployments, version control, and CI/CD pipelines. Participate in agile development and O&M support while ensuring accessibility and security compliance. The onsite Washington, D.C. role supports government customers and requires an active Top Secret clearance with SCI and CI polygraph eligibility.

Develop and support enterprise full-stack applications using Java, Spring Boot, React, and PostgreSQL. Design secure REST APIs, responsive user interfaces, database schemas, and migration solutions. Manage deployments, version control, CI/CD pipelines, documentation, accessibility, security compliance, and full software lifecycle activities within an agile Scrum environment. The role is onsite at a government facility in Washington, D.C.

Design and develop Java Spring Boot backend microservices for a Master Data Management platform, including data ingestion, validation, match-merge, golden records, workflows, REST APIs, and downstream integrations. Build AWS-based processing and orchestration solutions, implement security controls, optimize performance, write tests, support containerized CI/CD deployments, and contribute to architecture, documentation, code reviews, and Agile delivery.

Lead full-stack engineering within Payments Technology: design, develop, and maintain secure, resilient Spring Boot/Java services; drive CI/CD, Kafka event-driven solutions, AI-assisted engineering adoption, and architectural reviews to improve stability and delivery.

Designs, develops, tests, documents, and maintains web-based applications throughout the full software development lifecycle. Builds J2EE web applications, Java client/server solutions, database systems, and web interfaces based on business requirements. Collaborates on requirements gathering and analysis while producing software design and engineering documentation. Works independently or collaboratively to deliver high-quality solutions under tight deadlines.

Develop and deploy high-performance, highly available Java server-side applications and evolve existing systems into large-scale service architectures. Responsibilities include object-oriented design, distributed computing with Hadoop, Spark, and Akka, unit testing, debugging, integration, networking and security implementation, and participation in agile CI/CD and DevOps practices.

Designs, develops, tests, documents, and operates large-scale distributed software products for Allstate’s Enterprise Payments organization. Responsibilities include building Java and Spring Boot REST APIs, designing microservices, collaborating on system architecture, practicing paired programming and test-driven development, establishing CI/CD pipelines, improving performance, securing APIs, supporting production applications, and contributing to Agile planning, retrospectives, and knowledge sharing.

Join the US Bank Accounts team to design, build, and scale banking products. Own end-to-end projects, implement high-quality APIs and tooling, improve platform robustness, and collaborate across teams to deliver production services that handle large-scale distributed workloads.

Lead architecture and technical strategy for mission-critical, cloud-native payment applications. Mentor engineers, design high-performance Java backends, APIs (REST/gRPC), multi-region resilient systems, promote Kubernetes and cloud platforms, enforce engineering standards, and drive adoption of AI-assisted engineering practices and SDLC automation.

Lead full‑stack development of scalable, secure services and UI using Java, Python, and React. Build AI/agentic capabilities with Smart SDK, design data/search solutions (PostgreSQL, OpenSearch), drive cloud-native engineering on AWS with Terraform, improve SDLC via AI-assisted tooling, mentor engineers, and deliver operational reliability.