Top Java Developer Jobs in Philadelphia, PA

Lead backend Java development and architecture for enterprise applications. Design and deliver scalable, resilient microservices and APIs, mentor developers, lead technical decisions, support production incidents, and implement CI/CD and cloud-native solutions on AWS.

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 maintain Java-based backend services and APIs for KeeperApp. Own backend components, optimize MySQL schemas/queries, ensure performance and reliability, apply secure coding practices, participate in code reviews, and collaborate with product and engineering teams to deliver features iteratively.

Lead design, development, testing, and maintenance of enterprise Java microservices and front-end applications. Build APIs, CI/CD pipelines, and containerized deployments; troubleshoot production, ensure security/compliance, mentor junior developers, and collaborate within Agile teams.

Build and deliver backend enterprise web applications for Citi's Integrated Digital Assets Platform using Java/Spring and web3 technologies. Collaborate with distributed teams, follow best practices and design patterns, write technical documentation, resolve issues, and ensure scalability, reliability, and performance.

Design, build, and maintain secure, high-performance RESTful APIs and microservices using Java and Spring Boot. Collaborate with cross-functional teams, implement API security (OAuth2/JWT/OpenID Connect), optimize databases, integrate messaging systems, write unit/integration/API tests, participate in code reviews and architecture decisions, troubleshoot production issues, and contribute to CI/CD and DevSecOps practices.

Lead architecture and delivery of enterprise Java full-stack applications. Hands-on development with Java/Spring Boot, microservices, AWS cloud-native services, database tuning (Oracle/RDS), CI/CD pipelines, monitoring, and incident resolution. Mentor engineers, enforce code quality, run architectural reviews, and collaborate with product, DevOps, and security teams to ensure scalable, secure, high-availability solutions.

Design, build, and maintain scalable enterprise full-stack applications using Java, Spring Boot, microservices, and modern front-end frameworks. Implement cloud-based solutions on AWS, contribute to CI/CD and DevOps automation, optimize performance and security, and integrate AI-driven capabilities using Python and orchestration tools like LangChain and LangGraph.

Develop, maintain, and optimize backend services and APIs for a scalable healthcare platform using Node.js, Java, or .NET. Integrate third-party services, ensure performance, reliability, and security, collaborate with cross-functional teams, participate in code reviews, and work in an Agile environment to deliver high-quality server-side applications.

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.

Design, build, and maintain scalable Java Spring Boot microservices and REST APIs. Deploy and operate cloud-native applications on GCP, implement CI/CD, optimize performance and databases, ensure security and reliability, collaborate with cross-functional teams, and troubleshoot production issues.

Lead architecture and delivery of large-scale Java microservices. Define standards, mentor teams, design RESTful and event-driven systems, ensure scalability, resiliency, CI/CD, observability, and data governance while collaborating with stakeholders and managing technical risk.

Lead architecture and delivery of Java-based microservices, define standards, mentor engineers, collaborate with stakeholders on technology roadmap, ensure scalability, resilience, monitoring, CI/CD, and data governance for large-scale production systems.

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.