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Founding Engineer

Job in San Francisco, San Francisco County, California, 94199, USA
Listing for: Weekday AI (YC W21)
Full Time position
Listed on 2026-02-11
Job specializations:
  • Software Development
    Cloud Engineer - Software, Full Stack Developer
Salary/Wage Range or Industry Benchmark: 130000 - 180000 USD Yearly USD 130000.00 180000.00 YEAR
Job Description & How to Apply Below

This role is for one of the Weekday's clients.

Salary range: $130k - $180k

Experience:

5+ YoE

Overview

Join a passionate founding team and work closely with the leadership to design and deliver highly scalable systems that transform the LLM developer experience. This is a rare opportunity to shape a product from inception, influence its technical direction, and make a significant impact on the future of AI observability.

Key Responsibilities
  • Feature Development:
    Design, develop, and implement new features to enhance the platform and improve developer experience.
  • Backend & Frontend Services:
    • Frontend:
      Next.js, Tailwind CSS
    • Proxy worker:
      Wrangler/Cloudflare
    • Application database:
      Supabase
    • Analytics database:
      Click House
    • Backend services:
      Express/AWS ECS
    • Queue systems:
      Kafka
  • End-to-End Ownership:
    Manage projects from ideation to deployment and post-launch optimization.
  • Deployment & Operations:
    Oversee deployment workflows and ensure smooth, reliable system operations.
  • Collaboration:

    Work on feature requests, integrations, and documentation enhancements to improve usability.
  • Community Engagement:
    Gather user feedback, encourage contributions, and iterate on the product based on real-world use cases.
Preferred Skills
  • Type Script Expertise:
    Strong experience in Type Script (core to the majority of the codebase).
  • Database Knowledge:
    Proficiency with SQL and similar technologies, with experience in Click House, Supabase, and Postgres.
  • Cloud Services:
    Familiarity with cloud deployment workflows; experience with Cloudflare is advantageous.
  • Problem-Solving & Communication:
    Ability to simplify complex problems and communicate effectively with both technical and non-technical stakeholders.
  • Adaptability:
    Quick learner who thrives in a dynamic, fast-paced startup environment.
  • AI Knowledge:
    Solid understanding of LLMs and the AI ecosystem.
  • Hands-On Product Familiarity:
    Prior use of the platform is preferred to bring valuable user insights into development.
Tech Stack
  • Languages:

    Type Script, Python
  • Frameworks:
    Next.js, Tailwind CSS, Express, ShadCN
  • Hosting:
    Kubernetes, AWS, GCP, Vercel, Supabase
  • Services:
    Docker, Postgres, Click House, Cloudflare Workers, Redis
  • Developer Tools:
    Unix, CLI, Git
  • LLM Integrations:
    OpenAI, Anthropic, Gemini, Together

    AI, and others
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