Senior Software Engineer
St. Louis, MO
Category: Development
Industry: Financial Services
Reference ID: JN -082026-108318
Date Posted: 08/18/2026
Shortcut: http://careers.eliassen.com/0VoYD2
Description:
Hybrid 4 days in office in St. Louis, MO
Our client seeks a hands-on Senior Software Engineer to modernize and maintain a mission-critical enterprise application in AWS GovCloud. The role focuses on practical engineering, reliability, and collaboration with architects and scrum teams to deliver scalable microservices and micro-frontend solutions.
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: $85.00 to $95.00/hr. w2
JN -082026-108318
Responsibilities:
- Design and implement microservices using Java, Spring Boot, and TypeScript supporting event-driven and RESTful patterns.
- Build solutions on AWS GovCloud services including ECS or EKS, Lambda, EventBridge, and RDS within microservices and micro-frontend architectures.
- Reduce technical debt through dependency and framework upgrades with strong test automation.
- Implement UI test automation and BDD practices to ensure quality.
- Collaborate with enterprise architects and scrum teams to translate architecture into scalable solutions.
- Apply reusable patterns and best practices for architectural consistency.
- Participate in architecture and code reviews and technical discussions aligned with enterprise standards.
- Document designs and decisions with clear technical writing.
- Troubleshoot production issues, optimize performance, and deliver robust features.
- Contribute to both new feature development and ongoing production support in Agile sprints.
Experience Requirements:
- 5+ years of hands-on software engineering experience.
- Advanced proficiency with Java and the Spring Boot ecosystem.
- Experience with AWS Cloud services such as ECS or EKS, Lambda, and RDS or Aurora, and IaC tools like CDK or CloudFormation.
- Experience with Angular. Familiarity with micro-frontend architecture using module federation is a plus.
- Background in microservices architecture and modernization patterns such as the strangler pattern.
- Strong technical writing and communication skills.
- Collaborative approach and effective problem solving in cross-functional teams.
- Comfort with AI-enabled tools and willingness to learn and apply emerging technologies. Experience with GitLab CI/CD and Copilot is beneficial.
- Preferred experience with FedRAMP High, FISMA, or similar compliance environments.
- Track record in reducing technical debt through refactoring and automation.
- Familiarity with CI/CD, artifact management, and security scanning.
- Familiarity with observability tools such as CloudWatch, Grafana, and OpenSearch.
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 contact fraud@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