Top Java Developer Jobs in Philadelphia, PA

Senior backend-focused engineer responsible for designing, building, and supporting high-scale Java/Spring Boot microservices, driving CI/CD and DevOps practices, mentoring teammates, implementing automated tests, troubleshooting performance issues, and contributing to pipeline automation and continuous improvement.

Backend developer role building services using statically typed languages (Scala, Java 8). Work includes REST APIs, dependency injection, scalable distributed systems, and using Git and CI/CD pipelines. Contract role with relocation and benefits.

Contract Java Developer to perform Java development (2–5 years), testing and test-data creation/management, data conversion and file migration, report generation, SQL query work, and use IBM RAD. Requires a BA/BS in IT.

Design, develop, and implement web-based Java applications and RESTful services using Java and Python. Build services on Hadoop data environments, create design documents, perform coding, testing, debugging, and help scale prototypes to production. Support a recommendation system for sales associates and address security/authentication concerns.

Develop and maintain high-performance Android applications, design new features, troubleshoot code, and work with REST/Web Services in a multi-threaded environment.

The Backend Engineer will develop cloud-native applications, engage in full life-cycle development, and work with various technologies including Java/Kotlin and AWS in a remote environment.

Design, develop, and implement web-based Java applications following SDLC. Create design documents, perform coding, testing, debugging, and collaborate with operations and QA to ensure successful releases. Required to use Scala/Akka/Play, Java, Spring MVC, Cassandra and related technologies. Contract role; interviews via phone and Skype.

Design, develop, and implement web-based Java applications following SDLC. Create design documents, code, and test features; debug and resolve technical issues; collaborate with operations and QA to deliver releases in an agile environment.

Architect and design n-tier Java EE web applications, translate functional requirements into technical designs, lead and mentor developers, implement development best practices (TDD, CI), work with stakeholders, and oversee delivery for high-quality deployments.

Contractor will build web services and REST APIs on Hadoop data environments to create a recommendation system for sales associates. Role focuses on backend development using Java, Python, J2EE and Spring.

Build web services and a recommendation system using Hadoop data environments. Develop Java/J2EE applications with Spring, implement RESTful services, and apply Python for data-related tasks to support sales associate recommendations.

Develop the VOD DataMart to provide end-to-end visibility into VOD ingest workflows and reporting. Implement Java Spring Boot services with Spring Security, RESTful APIs and an AngularJS front end to surface asset status, errors, and triage information for internal teams and partners.

Technical lead to migrate legacy Java services to a microservices architecture using Spring Boot and Pivotal Cloud Foundry. Implement microservices, ensure code quality with SonarQube, work in Agile/Scrum, and use GoCD for continuous delivery. Requires 5+ years Java experience and at least one full lifecycle Spring Boot engagement.

Enhance and support a cloud-based in-memory Data Grid platform and microservices for resiliency and stability initiatives. Develop Java-based services using Spring, Hibernate/JPA, REST/SOAP, NoSQL and relational databases, and work with AWS, CI tools, and source control.

Develop and maintain Java/J2EE applications with UI built using AngularJS/JavaScript. Implement and troubleshoot VoIP/SIP solutions, participate in SDLC and project lifecycle activities, perform design and architecture reviews, collaborate with global teams, and work within networking and cable domain. May require occasional travel.

The Software Engineer III will design, develop, and maintain Java EE applications, collaborating with teams, conducting testing, and supporting deployment in a fast-paced environment.

The Software Engineering Lead - Java oversees enterprise Java solutions, leading developers, collaborating with analysts, and ensuring code quality and operational support.

Develop and maintain Java Spring Boot microservices, write automated tests and API validations, debug and optimize performance, collaborate with architects, front-end developers and product owners, participate in Agile ceremonies, document designs, perform peer code reviews, and support deployments and release activities.

Design, develop, and maintain Java-based web applications and responsive frontends (Angular/React). Build and consume RESTful APIs and microservices, perform code reviews, mentor junior devs, collaborate with cross-functional teams, troubleshoot production issues, and ensure security, scalability, and reliability.

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.

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 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.

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