Top Java Developer Jobs in Philadelphia, PA

Join a product team building web and mobile apps for frontline associates and managers. Lead iterative design, develop back-end services, collaborate with designers and engineers, apply best practices (TDD, SOLID), rapidly prototype, and guide product delivery.

The Java Developer will enhance data utilization for a large state-run project, involving data aggregation, web application development, and collaboration with other teams.

Develop and maintain deep Windchill Java customizations (services, listeners, processors, TAM types/attributes, JSP/HTML UI), optimize performance, lead upgrade and migration efforts, provide post-go-live support, document architecture and runbooks, and mentor junior engineers while enforcing PTC customization best practices and engineering standards.

Design, develop, test, deploy, and maintain enterprise Java applications for USPS. Build RESTful APIs with Spring, translate requirements into architecture, implement CI/CD/DevSecOps, integrate relational databases, troubleshoot complex issues, and collaborate with cross-functional Agile teams to deliver high-quality software solutions.

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.

Design, develop, test, and deploy full-stack Java applications (backend Java/Spring Boot, frontend React/Angular, PostgreSQL). Lead architecture decisions, mentor developers, perform code reviews, troubleshoot issues, implement testing strategies (JUnit, Cypress, Playwright), collaborate with product/QA/DevOps in Agile, and support VA mission-critical initiatives while meeting security and clearance requirements.

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.

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 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.

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.

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.

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.

Design, build, and maintain server-side Java applications and RESTful APIs. Optimize performance and scalability, ensure security, collaborate with cross-functional teams, perform code reviews, troubleshoot production issues, and document system architecture.

Analyze legacy TIBCO BusinessWorks/MFT processes to extract business logic, design and build a decoupled Java/Spring Boot microservices platform, migrate protocols to Kafka/RabbitMQ/REST, translate XML-heavy transformations to modern formats, and validate performance and SLAs to match legacy throughput.

Design, build, and maintain Java/J2EE multi-layer applications and APIs. Collaborate with architects and DevOps to implement CI/CD, code quality, testing, and database solutions (DB2/Oracle, PL/SQL). Support cross-team delivery, resolve technical roadblocks, and drive process improvements in an asset management/financial services context.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Build and maintain backend services and REST APIs using Java (11/17+) and .NET (ASP.NET Core). Implement business logic, data access, and integrations; write well-tested code with JUnit/xUnit/NUnit; contribute to CI/CD and DevOps; participate in design, code reviews, and Agile ceremonies.

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 Senior Full Stack Java Developer will design and maintain enterprise applications using Java and modern front-end technologies while collaborating in Agile teams and mentoring junior developers.

The Java Developer will work on projects requiring strong Java development skills, particularly with Spring, REST, and CI/CD practices. 7+ years of experience is necessary.

The candidate will develop and test business logic and user interfaces for a financial application, focusing on both front-end and back-end technologies.

We are seeking Java developers with Scala experience for a 6-month contract position. Responsibilities include developing applications, working with databases, and collaborating in a team-oriented environment.

The Java Developer will design, develop, and implement web-based Java applications, support business requirements, resolve technical issues, and follow lifecycle methodologies.

Seeking a Java Developer with experience in Java 8 development, writing Restful web services, and Spring framework. DevOps experience is a plus.