Drimva

Protagonist

Senior Full Stack Engineer (AI Platform)

$95K–$141K

Washington DC +1 · Senior · Full-time · Posted Sep 4, 2026

Location
Washington DC
District of Columbia, United States
Experience
5+ years building production software; degree alternatives: 5 years with a bachelor’s degree or 3 years with a master’s degree.
Education
Bachelor’s in Computer Science, Computer Engineering, or a related technical field; or master’s degree in one of these fields. The posting does not state an equivalent-experience alternative.

About the job

Build and evolve Protagonist’s internal AI platform, owning production software across backend services, data infrastructure, LLM systems, and analyst-facing applications.

What you'll do

  • Own platform features end-to-end, from design and implementation through testing and production.
  • Build LLM-powered services and data/ML workflows, including agents, RAG retrieval, and document processing.
  • Shape platform architecture and roadmap with technical leadership and translate analyst and customer needs into scalable software.

What they ask for

  • U.S. person eligible to work on government contracts.
  • Bachelor’s degree and 5 years of experience, or master’s degree and 3 years of experience, in Computer Science, Computer Engineering, or a related technical field.
  • 5+ years building production software, with demonstrated ownership of full-stack systems.
  • Expert Python; deep Django (or equivalent framework) and PostgreSQL experience; strong TypeScript/React skills; experience with LLM applications, search infrastructure, event-driven architectures, AWS, Docker, Kubernetes, Git, CI/CD, and Terraform.

Nice to have

  • Active or prior SECRET clearance.
  • Experience with ML/data orchestration or NLP pipelines, compliance-constrained environments, data visualization, or analyst-facing tools.

Pay

$95,000-$141,000 (base salary)

Tools

Django REST APIs, React/TypeScript, AWS Bedrock, OpenSearch, Metaflow, Argo Workflows, Kubernetes, PostgreSQL

AI focus

Build production LLM agents and RAG systems using AWS Bedrock and OpenSearch, including prompt engineering, evaluation, and cost/usage controls; develop data and ML workflows for ingestion, enrichment, classification, and document processing.

Model-written summary · the original posting is authoritative

First seen Oct 31, 2026 · Last verified Nov 4, 2026 (UTC)