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Sr. Software Engineer, Back-End

rebuy

$130,000 - $180,000
Oct 2, 2025
Remote, US
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Rebuy is looking to solve the problem of revolutionizing shopping with intelligent, personalized experiences by developing their backend AI technology on their r.AI team. This involves building AI agent systems that empower merchants and power AI shopping experiences.

Requirements

  • Experience with LLM systems: Gemini, Claude, OpenAI, and/or other.
  • GCP or other cloud hosting platforms (AWS, Azure).
  • Kubernetes / GKE, Docker, and general containerized workflow experience
  • Hands on programming experience: TypeScript/JavaScript, Python, other
  • Experience with relational databases (PostgreSQL / MySQL)
  • Memory stores and caching (Redis)
  • Networking/Security: Cloudflare, IAM, service accounts, secrets management, load balancers, JWT & OAuth

Responsibilities

  • Work with a small team building and launching a new product into the market.
  • Develop AI systems to include: Agentic Assistants, Generative UI, Search RAG, Tracing and Evals using LangSmith.
  • Engineer authentication and authorization across GCP hosted systems
  • Build a compelling and easy to maintain codebase with eye toward scalability
  • Technical member of our design partnerships that drive our customer focused product development
  • Leverage SOTA in Agentic systems to support company development processes such as CI/CD.

Other

  • The ability to get your hands dirty in the code and take ownership of solutions.
  • A collaborative mindset and work approach with the ability to lead projects and mentor others.
  • The ability to thrive in a fast paced environment with a high level of autonomy and responsibilities.
  • Excellent communication skills especially being able to explain technical concepts to both technical and non-technical audiences.
  • A positive attitude, enthusiasm to be a problem-solver, self-motivated, and a passion about e-commerce.