Top Java Developer Jobs in Philadelphia, PA

The Software Engineer Lead manages Java development and application support, mentors team members, and ensures project delivery in an Agile environment. The role includes API development, database integration, and technical documentation.

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.

The Java Engineer will develop applications for international use, focusing on full lifecycle development with a backend emphasis in a team of ten.

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 high-performance Java applications, work on web and mobile applications, and collaborate in Agile/Scrum teams.

As a Junior Java Developer, you will design and develop web components, perform testing, manage software deployment, and enhance existing code.

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.

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 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.

Design, build, and maintain scalable Java/Spring Boot backend services; implement event-driven systems with Kafka (producers/consumers, stream processing); design and optimize caching with Redis and in-memory strategies; perform performance tuning and bottleneck analysis; take end-to-end ownership of components, debug production issues, and collaborate in fast-paced environments while enforcing code quality and reusable designs.

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.

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.

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.

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, develop, test, and deploy Java/J2EE applications and integrations. Lead implementation planning, gather and specify requirements, mentor junior developers, resolve defects, support production (on-call), and ensure database and SOX-compliant process documentation.

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.

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.

Lead migration of legacy COBOL systems to Java-based microservices and develop scalable, secure full-stack solutions on Azure. Build RESTful APIs, optimize performance, ensure DoD cybersecurity compliance, collaborate across teams, document architectures, and participate in Agile ceremonies.