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Senior Full Stack Engineer

Job in St. Louis, Saint Louis, St. Louis city, Missouri, 63105, USA
Listing for: Strategic Staffing Solutions
Full Time position
Listed on 2026-01-16
Job specializations:
  • Software Development
    Full Stack Developer, Software Engineer
Salary/Wage Range or Industry Benchmark: 125000 - 150000 USD Yearly USD 125000.00 150000.00 YEAR
Job Description & How to Apply Below
Location: St. Louis

STRATEGIC STAFFING SOLUTIONS (S3) HAS AN OPENING!

Strategic Staffing Solutions is currently looking for a Full-stack engineer
, a W2 contract opportunity with one of our largest clients!

++Candidates should be willing to work on our W2 ONLY, NO C2C++
Senior Full Stack Software Engineer

Location:

Charlotte, NC, or St. Louis, MO

Duration: 12 Months

About the Role:

Strategic Staffing Solutions has an immediate need for a hands-on Senior Full Stack Software Engineer who thrives in the code and takes true ownership of what they build. This is a role for a doer, not a coordinator, someone who leads by example, contributes directly to implementation, and is passionate about delivering high-quality software.

You’ll work across the full stack, building modern, scalable applications while collaborating closely with other engineers, product partners, and stakeholders. Curiosity, initiative, and a genuine passion for technology both inside and outside of work are essential.

Our team actively uses AI-assisted development tools such as Microsoft Copilot and Git Hub Copilot, and we value engineers who are open to embracing these tools to improve productivity, code quality, and innovation.

Responsibilities
  • Design, build, and maintain full-stack applications using modern backend and frontend technologies
  • Develop and maintain RESTful APIs using Spring Boot
  • Build responsive, user-friendly interfaces using React and Type Script
  • Write clean, maintainable, and well-tested code across the stack
  • Create and execute unit and automated tests to ensure reliability and quality
  • Contribute to system design discussions and help guide technical decisions
  • Lead by example through strong coding practices, ownership, and delivery focus
  • Leverage AI-assisted development tools to accelerate development and improve outcomes
  • Continuously learn, experiment, and bring new ideas to improve the team and the product
Required Qualifications
  • 4 years of professional software engineering experience, or equivalent demonstrated through work experience, consulting, training, military service, or education
  • Strong experience with full-stack development
  • Ability to take ownership of features from design through delivery
  • Comfortable working in a collaborative, fast-paced environment
Required Skills & Experience
  • Spring Framework, including Spring Boot (building JSON REST APIs)
  • React

    JS with Type Script
  • MongoDB
  • Apache Kafka
  • Unit testing experience (e.g., JUnit with Mockito, Jest)
  • Automated testing experience (e.g., Rest Assured, Selenium, or Playwright)
  • Familiarity with cloud technologies
  • Experience with Git Hub hooks and automation
  • Experience or interest in AI-assisted development tools such as Microsoft Copilot and Git Hub Copilot
  • Strong delivery mindset with the ability to lead while contributing directly to code
  • Passion for technology, including learning and experimentation outside of work

Beware of scams. S3 never asks for money during its onboarding process.

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Position Requirements
10+ Years work experience
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