Sr. Full Stack Engineer

Sr. Full Stack Engineer (Senior) — On-Site, U.S. Citizenship Required

Clearance: Ability to obtain/maintain Public Trust (IRS)

Work Location: On-site

• Authorized work sites:
  • IRS Main Building — 1111 Constitution Ave NW, Washington, DC 20224
  • IRS New Carrollton Federal Building (NCFB) — 5000 Ellin Rd, Lanham, MD 20706
  • IRS Ogden Office — 2484 Washington Blvd Ste 200, Ogden, UT 84401
  • IRS Farmers Branch Office — 4050 Alpha Rd, Farmers Branch, TX 75244

Work Hours: Mon-Fri 8:30am-5:30pm (some flexibility)

Contract Term: Anticipated 12-month base period; government may exercise options or surge CLINs. Role is contingent on award/funding.

• Candidate Pay: $60.66 - $64.66/hr
• Employment type:
  
  Full-time W-2

You’ll lead full‑stack design and delivery of secure APIs and services that power high‑impact federal applications. This is a hands‑on leadership role owning architecture, code quality, CI/CD, and production reliability while mentoring a small team.

• Architect, build and ship resilient services and modern web frontends
• Design and document REST/Graph
  
  QL APIs and service contracts
• Establish and enforce engineering standards, testing strategy, and code reviews
• Own CI/CD pipelines, container builds, and infrastructure‑as‑code
• Optimize performance, reliability, and observability (metrics/tracing/logging)
• Collaborate closely with product, data, and security to deliver roadmap commitments

• 7‑10+ years professional software engineering with recent senior/lead experience
• Expertise in one or more back‑end stacks (Node/Type Script, Java/Spring, Python/FastAPI) and a modern UI framework (React/Angular/Vue)
• Strong API design, SQL/No
  
  SQL, distributed systems, and security fundamentals (OAuth/JWT, TLS, secrets)
• Cloud proficiency (AWS/Azure/GCP) and containers (Docker/Kubernetes);
  IaC (Terraform/Cloud Formation)
• U.S. work authorization; eligibility for Public Trust

• Microservices/event architectures; message brokers (Kafka/SNS/SQS)
• Advanced testing (contract tests, e2e), performance profiling, feature flags
• FedRAMP/FISMA awareness; 508/USWDS familiarity

• Bachelor’s in Computer Science, Information Systems, Engineering, or closely related field
• Equivalent experience may substitute for degree (industry‑standard substitution)