Senior Java Full Stack Developer

Title: Senior Java Full Stack Developer (Contract) – Job#5939

Location: Springfield, MA area / Hybrid Remote

Our client located in the Springfield, MA area has an immediate opening for a Sr. Java Full Stack Developer to join their team. The Senior Java Full Stack Developer will have strong expertise in enterprise integration, AWS cloud technologies, and database development. This Consultant will play a key role in designing and implementing data pipelines that bridge multiple source systems, contributing immediately upon onboarding.

The Consultant will work closely with the IT Development team and business stakeholders to build scalable integration solutions using Spring Boot, Apache Camel, and AWS services (ECS, S3, SQS). Additionally, the role involves enhancing existing applications, developing front-end interfaces, optimizing database performance for high-volume workloads, and collaborating with architects on technology evaluations and best practices.

• Enhance existing applications using Java 17/21 and Spring Boot
• Interact with Oracle databases using SQL and PL/SQL
• Develop new front end pages with HTML, CSS, Bootstrap and AJAX
• Enhance existing front ends using Thymeleaf, HTML, CSS and AJAX
• Write thorough, correct unit tests using JUnit and Mockito
• Deploy code using Jenkins
• Interact with end users to determine requirements
• Design data pipelines to extract, transform, and bridge data from multiple source systems into formats required by downstream applications
• Deploy containerized applications on AWS ECS with Fargate and utilize S3 for object storage and SQS for asynchronous message processing
• Design and optimize database schemas with partitioning strategies for high-volume tables (10M+ rows) in Oracle or PostgreSQL
• Build integration adapters using Apache Camel for message routing, transformation, and orchestration across messaging systems (AMQ/JMS/SQS)
• Collaborate with architects on technology evaluations, document integration designs, and mentor team members on Spring Boot and AWS best practices

• Bachelor's Degree
• Strong proficiency in Java 17/21 and Spring MVC
• Experience working with Oracle databases
• Experience building front ends using HTML, CSS, Bootstrap and AJAX
• Experience writing Unit tests with JUnit and Mockito
• Excellent communication skills, highly adaptable and resilient under pressure
• Independent worker able to clear their own blocks
• Experience with Apache Camel for enterprise integration patterns and JMS/Active
  
  MQ for asynchronous messaging
• Hands‑on experience with AWS services including ECS, S3, and SQS
• Strong SQL skills with experience in Oracle or Postgre
  
  SQL database development (PL/SQL or PL/pgSQL)
• Experience optimizing database performance including partitioning and indexing strategies for high-volume tables
• Understanding of RESTful API design and microservices architecture
• Experience with Thymeleaf or similar server‑side templating engines
• Familiarity with CI/CD pipelines using Jenkins
• Python scripting experience for data processing and file manipulation; knowledge of Spring Batch for batch processing

Delphi-US is a national recruiting firm based in Newport, Rhode Island. We specialize in IT, Engineering and Professional Staffing services for premier corporations and a multitude of industries across the United States. We are the Peacemakers In The Talent War – bringing the best and brightest talent to Employers of Choice, enabling critical project success, fostering progressive employment relationships, and promoting competitive advantages for our Clients and the Talent Marketplace we serve.

Delphi accomplishes this with a proprietary skill-based and cultural matching process that results in higher qualified submissions along with increased interviews and offer rates. You’ll find our team is highly experienced, friendly, professional and ready to advocate on your behalf, armed with industry trends, and an understanding of employer expectations.