Top Senior Java Developer Jobs in Seattle, WA

Lead backend engineer on Merchant and Fraud Prevention team delivering secure, stable, and scalable production software. Design, develop, test, and troubleshoot backend and streaming systems, use SDLC toolchains and CI/CD, work with large data sets, and apply enterprise-authorized AI-assisted development tools while ensuring responsible AI use and operational resiliency.

Looking for an experienced Java Developer with expertise in Spring, SOAP/REST services, JAXB, OSGI, Oracle, and Hibernate. Position available as contract or full-time.

The role involves architecture, design, and development of Java-based systems, overseeing projects, and advising clients. Extensive experience in Java development is essential.

Seeking a Java Developer with expertise in Microservices, Spring Boot, and RESTful services, with a focus on API-first methodology and relevant technologies.

The Lead Java Developer will be responsible for leading agile teams, developing Java applications from scratch, and utilizing Docker for deployment. Must drive collaboration between onshore and offshore teams.

The Senior Java Developer will design, architect, and improve application software, leading technical solutions and mentoring team members in complex projects.

Develop large scale applications using Java, Python, and Hadoop. Oversee full life cycle development with significant experience.

The Senior Software Engineer will develop rich media applications using Java and Spring, focusing on REST services and Google Cloud. Experience in object-oriented design, iOS/Android support, and high-performance internet applications is required.

Build and maintain scalable full-stack platforms using Java, React, microservices, containers, databases, and cloud services. Responsibilities include designing distributed systems, contributing to architecture, leading design sessions and code reviews, developing reusable components, supporting Azure-based development workflows, mentoring engineers, improving engineering practices, and performing application implementation and maintenance with minimal direction.

The Sr Staff Software Engineer will drive technical strategy, design scalable systems, lead engineering activities, and mentor teams while managing platform improvements and integrations.

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 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.

Lead design and delivery of scalable, resilient distributed systems. Act as technical authority across teams, mentor engineers, drive architecture and CI/CD best practices, troubleshoot production issues, optimize performance, and enhance observability while writing production-grade Java.

Design, implement, test, and maintain scalable Java/J2EE microservices using Spring technologies. Collaborate with architects, follow SDLC, perform unit/system testing, troubleshoot distributed cloud applications, and work in Agile teams to meet enterprise performance and security standards.

Lead Software Engineer responsible for designing, developing, testing, and maintaining a distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements, implement cloud and big-data solutions (Spark/Hadoop), and ensure program standards and reliable delivery.

Develop, test, and maintain a complex distributed processing application using Python and Java. Collaborate with product owners, data coaches, analysts, DBAs, and Agile teams to meet backend/frontend requirements. Work with distributed workloads (Spark/Hadoop), SQL/Snowflake, AWS, shell scripting, and job scheduling/process automation. Support delivery under Agile/SAFe practices and ensure alignment with program standards.

Design, develop, and maintain web-based UI and REST middleware for federal health IT systems. Participate in Agile/SAFe ceremonies, write design documents, implement features, resolve bugs, and support CI/CD pipelines while collaborating with product, QA, and stakeholders.

Lead backend architecture and implementation for Java Spring microservices, validate and own AI-assisted code, mentor engineers, collaborate with product to deliver features, and drive technical excellence and scalable, test-covered systems.

Develop Java/J2EE applications using Spring Boot and microservice architecture with AngularJS front-ends. Work with Cassandra and RabbitMQ concepts; cloud experience (Pivotal Cloud Foundry or AWS) is a plus. Requires 5+ years experience and a bachelor’s degree. Contract role with relocation and benefits.

Develop and maintain ATG/Java J2EE applications across the full SDLC. Implement REST/XML services, front-end features (AngularJS, jQuery, AJAX, JSON), and server-side components using Struts, Spring, Hibernate. Work with WebLogic, Oracle DB, JDBC/PLSQL, debug and document code, and collaborate with cross-functional teams.

Senior Java Developer to design, build and maintain Java/J2EE web and client/server applications. Work includes OOA/OOD, distributed systems, databases, messaging, APIs/frameworks, UI/frontend frameworks, SOA/web services, and automation in an Agile/TDD environment. Preferred experience with Cassandra, RabbitMQ, Pivotal Cloud Foundry and Spring Boot.

Senior Java Developer responsible for designing, implementing, and testing web and client/server applications using Java/J2EE and related frameworks (Spring, Hibernate). Work includes frontend integration (Angular/Bootstrap), database development and optimization (Oracle/SQL), messaging (MQ/JMS), CI/build tooling, testing, version control, and participating in Agile ceremonies and SDLC activities. Mentors team members and supports deployments.

Develop and maintain enterprise-class software for centralized management of hyper-converged data center products. Collaborate with cross-functional teams in an Agile/Scrum environment, integrate core product components, implement REST APIs, and automate firmware/software updates. Troubleshoot complex technical issues and drive maintainable software design using Java, Python, Spring, Cassandra and VMware technologies.

Design, build, and maintain backend services and large-scale data pipelines that ingest, transform, enrich, and index billions of records. Own features end-to-end, contribute to architecture, write testable performant code, perform reviews, support production systems, and collaborate with product and data science teams. Apply AI/LLM tooling to improve development and delivery.

Lead a small engineering team while writing production Java backend code daily. Design and own data ingestion, enrichment, entity resolution, and search-indexing systems. Ensure reliability, performance, observability, and technical quality; mentor engineers; collaborate with product and partners; drive down technical debt; use cloud, containerization, and CI/CD best practices to deliver scalable services.