Principal Full Stack Engineer
Merrimack, NH
Category: Development
Industry: Financial Services
Reference ID: JN -032026-106203
Date Posted: 03/30/2026
Shortcut: http://careers.eliassen.com/op5Lw3
Description:
Hybrid 50% onsite a month in Merrimack, NH
We are seeking a Principal Full Stack Engineer to join a high‑impact technology team within the financial services industry, supporting modern information delivery and recordkeeping platforms. This role is hands‑on and highly technical, with a strong emphasis on API development, cloud‑native architecture, and scalable backend systems.
You will work closely with architects, product owners, and engineering leadership in an Agile environment, helping to design, build, and evolve event‑driven, high‑volume applications on a modern, cloud‑ready stack. In addition to deep technical contribution, this role carries technical leadership and mentorship responsibilities across the squad.
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: $69.00 to $73.00/hr. w2
Responsibilities:
- Lead full‑stack development efforts with a strong backend focus
- Design and build RESTful APIs using Java (Java 21) and Spring Framework
- Develop and optimize database‑centric solutions using Oracle and PostgreSQL, including advanced PL/SQL
- Build and support event‑driven, multi‑threaded applications for high‑data‑volume processing
- Leverage Microsoft Azure services, including messaging, functions, gateways, and storage
- Use GitHub Copilot or similar GenAI tools to enhance development efficiency
- Define and maintain Java development standards and best practices
- Lead design reviews, code reviews, unit testing, integration testing, and performance testing
- Collaborate with product and Agile partners to refine backlog items and guide implementation
- Mentor junior engineers and provide technical leadership within the team
Experience Requirements:
- 12+ years of hands‑on full‑stack development experience
- Proven expertise in Java, Spring, API development, and relational databases
- 2+ years of hands‑on cloud experience, preferably Microsoft Azure
- Strong understanding of software design patterns, SDLC best practices, and Agile/Scrum
- Demonstrated ability to act as a self‑starter and technical leader in fast‑paced environments
- Excellent communication skills, including the ability to lead technical discussions and client demos
- Experience with GitHub Copilot or similar generative AI tools.
Additional Technical Experience
- CI/CD pipeline development using tools such as Jenkins, Maven, uDeploy
- Strong version control practices using Git
- Experience with Spring Batch, messaging technologies (e.g., JMS, Kafka, Azure messaging services)
- ORM frameworks such as Hibernate or MyBatis
- ETL and data movement technologies (e.g., Kafka, Informatica)
- Familiarity with modern IDEs and tools such as Eclipse, Postman, SQL Developer, SOAP UI
- Frontend experience with Angular is a nice to have
Education Requirements:
- Bachelor’s degree in Computer Science, Engineering, or a related field
- Azure-related certification (preferred).
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 fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contactInfoSec@eliassen.com.
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, as indicated above