Full Stack Engineer (Java Development / API testing)

Description: Hybrid 50% on site in either Merrimack, NH or Westlake, TX We are seeking 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 Responsibilities: • 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 Experience Requirements: Core skills needed: • Java & Spring Boot API Development (net-new development required) • 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 Role requires: • 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 GitHub Copilot or similar developer assist tools (preferred). Education Requirements: • 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). Recruitment Transparency Notice Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening and hiring process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team (, ) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group's use of these tools, including AI tools, as part of the application and hiring process. Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range. W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are 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. If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following: When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc. Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group. If you have any indication of fraudulent activity, please contact . About Eliassen Group: Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients' capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve. Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affirmative Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws. Don't miss out on our referral program! If we hire a candidate that you refer us to then you can be eligible for a $1,000 referral check!