Senior Java Full Stack Developer Consultant

Ampcus Inc; Holyoke (MA); On-site; USD 100,000 - 130,000; Full time

Job summary

Ampcus Inc is seeking an experienced Senior Java Full Stack Developer consultant in Holyoke, Massachusetts. You will play a key role in designing and implementing data pipelines while enhancing existing applications. Strong expertise in enterprise integration, AWS, database development, and front-end technologies is essential.

Your responsibilities will include developing new front-end interfaces, optimizing database performance, and collaborating with the IT Development team. Employer will not sponsor applicants for employment visas.

Qualifications

• Strong proficiency in Java 17/21 and Spring MVC.
• Experience working with Oracle databases.
• Excellent communication skills and adaptability under pressure.
• Experience with AWS services including ECS, S3, and SQS.

Responsibilities

• 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.
• Deploy containerized applications on AWS ECS with Fargate.

Skills

Java 17/21

Spring MVC

Oracle databases

HTML/CSS/Bootstrap/AJAX

JUnit and Mockito

AWS services (ECS, S3, SQS)

Apache Camel

SQL skills

CI/CD with Jenkins

Python scripting

Education

Bachelor's Degree

Job description

Description

Our client is seeking an experienced Senior Java Full Stack Developer consultant with 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.

Primary Responsibilities

• 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

Minimum Requirements

• 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/ActiveMQ for asynchronous messaging
• Hands‑on experience with AWS services including ECS, S3, and SQS
• Strong SQL skills with experience in Oracle or PostgreSQL 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

Employer will not sponsor applicants for any employment visas, at hiring or in the future, including but not limited to H-1B visas. Corp‑to‑Corp or subcontract personnel will not be considered for this position.

iTech Solutions, Inc. is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, protected veterans or individuals with disabilities.