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Leidos logo
Leidos

Leidos is an innovation company rapidly addressing the world’s most vexing challenges in national security and health.

Full Stack Python Engineer

Backend EngineerSoftware EngineerFull TimeRemoteLeadTeam 10,001+Since 1969H1B SponsorCompany SiteLinkedIn

Location

United States

Posted

75 days ago

Salary

$87.1K - $157.5K / year

Seniority

Lead

Job Description

Full Stack Python Engineer

Leidos

• Own the GRACE application layer end-to-end — Chainlit lifecycle hooks, chat profiles, session management, streaming configuration, data persistence, and human feedback integration • Build and extend custom Chainlit components in React/TypeScript • Design, build, and maintain Python backend services and API integrations • Own the Entra ID OAuth 2.0/OIDC authentication integration within Chainlit • Design and maintain secure file handling pipelines of all types • Build and maintain multi-LLM routing logic across OpenAI GPT, Anthropic Claude, and Google Gemini • Collaborate with the GRACE product team and ARPA-H stakeholders to translate user feedback into shipped improvements • Lead code reviews, set engineering standards, and mentor teammates

Job Requirements

  • Bachelor's degree in computer science or data science
  • 7+ years of non-internship professional software development experience
  • 7+ years of Python as a primary programming language in production environments
  • 7+ years of leading design or architecture (design patterns, reliability and scaling)
  • Experience building and shipping production LLM/AI chat applications
  • Experience with Chainlit or a comparable Python-first conversational AI framework
  • Experience building and owning REST APIs and backend service integrations end-to-end
  • Experience with OAuth 2.0 / OIDC authentication flows in production systems
  • Experience with cloud infrastructure (Azure preferred) and containerization (Docker)
  • Experience with modern JavaScript/TypeScript tooling and frameworks
  • Experience working with relational databases (eg PostgreSQL)

Benefits

  • Health and Wellness programs
  • Income Protection
  • Paid Leave
  • Retirement

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