Full Stack Engineer; Java Development​/API testing

Hybrid 50% on site in either Merrimack, NH or Westlake, TX

We are seeking a senior full stack engineer to build, test, and engineer REST APIs for a data platform. The role requires strong Java and Spring Boot skills, API design expertise, and experience deploying and supporting applications on AWS. You will contribute to strategic roadmaps, collaborate in an agile environment, and support high‑scale, production‑grade systems for an organization focused on modernizing financial platforms that help customers achieve long‑term financial success.

The team values innovation, diversity of thought, and engineering excellence, and works in a collaborative agile environment where every voice matters.

Due to client requirements, applicants must be willing and able to work on a W2 basis. For our W2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.

Rate: $65.00 to $70.00/hr w2

• Design, develop, and maintain REST APIs using Java and Spring Boot
• Build and support applications deployed in AWS
• Follow Domain‑Driven Design principles and API lifecycle best practices
• Create and maintain Swagger / OpenAPI specifications
• Write unit and integration tests using JUnit, Cucumber, and REST Assured
• Support CI/CD pipelines using Jenkins, Maven, and Docker
• Monitor and support production applications using log aggregation tools (e.g., Splunk)
• Partner closely with business and technology stakeholders to prioritize work based on impact and strategic value
• Contribute to platform scalability, performance, availability, and monitoring
• Mentor and collaborate with other engineers in an agile environment

• AWS (cloud‑based application deployment and support)
• API testing using either Postman or Insomnia
• Strong verbal and written communication skills with both engineers and business stakeholders

• 8+ years of hands‑on software development experience.
• Java and Spring Boot API development, including greenfield / new services.
• Domain‑driven API design with Swagger or OpenAPI specifications and API lifecycle management.
• Proficiency with core Java, Spring MVC/Core/Boot, and SOAP/REST web services.
• Experience in UNIX and Windows environments with AWS cloud services.
• Test‑driven development with unit and integration testing using JUnit, Cucumber, and REST Assured.
• Familiarity with Postman or Insomnia for API testing.
• Familiarity with Git Hub Copilot or similar developer assist tools (preferred).

• Bachelor's or Master's degree in Computer Science or Engineering, or equivalent and practical / relevant experience alongside 8+ years of software/web development in a Java centric environment.
• AWS certification (preferred).

A W2 employee of Eliassen Group who is regularly scheduled to work 30 or more hours per week is eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre‑tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked‑in state/locality.