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Senior Software Developer

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: Eliassen Group
Full Time position
Listed on 2026-08-08
Job specializations:
  • Software Development
    Java Developer, Full Stack Developer, Angular Developer, AWS
Salary/Wage Range or Industry Benchmark: 100 - 125 USD Hourly USD 100.00 125.00 HOUR
Job Description & How to Apply Below
Location: St. Louis

Description:

Hybrid 2-3 days on-site in St. Louis, MO

Our client seeks a Senior Software Developer to support modernization and maintenance of a mission-critical enterprise application in AWS for the U.S. Treasury. The role requires full-stack development across Java/Spring Boot services and Angular/Type Script front ends, with emphasis on security remediation, cloud-native patterns, and application upgrades. You will collaborate across scrum teams, align with enterprise architecture, and contribute reusable patterns and robust test automation.

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
  • Vision benefits
  • 401k with company matching
  • life insurance

Rate: $100.00 to $125.00/hr. w2

Responsibilities:
  • Design and implement microservices using Java/Spring Boot and Type Script for event-driven and RESTful integrations.
  • Upgrade and modernize Angular applications and support micro-frontend approaches.
  • Build cloud solutions using AWS services including ECS/EKS, Lambda, Event Bridge, and RDS.
  • Remediate technical debt by upgrading dependencies and frameworks.
  • Ensure comprehensive test automation and maintain technical documentation.
  • Implement security best practices aligned to FRB System and U.S. Treasury guidelines, including vulnerability scanning and remediation.
  • Coordinate with Dev Ops, Info Sec, Program Management, and multiple scrum teams.
  • Communicate status, risks, and blockers to stakeholders.
Experience Requirements:
  • 5+ years of software engineering experience.
  • Proven AWS experience with ECS/EKS, Lambda, RDS/Aurora, and infrastructure as code with CDK or Cloud Formation.
  • Strong Java, Spring Boot, Spring Cloud, and Hibernate experience, with Tomcat exposure.
  • Strong Angular and Type Script experience. Micro-frontend architecture experience is a plus.
  • Microservices architecture experience, including use of the strangler pattern for legacy modernization.
  • Experience with observability tools such as Cloud Watch, Grafana, and Open Search.
  • Experience with test automation and development accelerators is preferred.
  • Proven technical leadership with cross-team collaboration.
  • U.S. citizenship required for a FedRAMP High environment.
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Position Requirements
10+ Years work experience
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