Senior Software Engineer TWE40822 Job at twentyAI, New York, NY

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  • twentyAI
  • New York, NY

Job Description

We're hiring on behalf of one of the most exciting early-stage AI software companies in the market today. Backed by Y Combinator and top-tier VCs, this NYC-based startup has already achieved proven product-market fit , serving 150+ enterprise customers and scaling rapidly.

Founded by a world-class team of engineers from Palantir, Google, and Uber , they’re building developer-first infrastructure and tools that are transforming how modern software teams build and ship products. Now, they’re looking to add a Senior Software Engineer to their elite founding team—someone who’s deeply product-minded, thrives in high-ownership environments, and wants to play a pivotal role in shaping the future of AI-driven development.

🛠 What You’ll Do

  • Work closely with the founding team to define product direction and shape the user experience
  • Drive architectural decisions and maintain a high bar for performance, quality, and scalability
  • Partner cross-functionally with product and design to create intuitive, developer-friendly workflows
  • Contribute to the evolution of the product and culture at a company that values autonomy, speed, and craft

💡 You Might Be a Fit If You…

  • Bring 4+ years of hands-on engineering experience building complex products
  • Are product-obsessed —you care deeply about solving user problems, not just writing code
  • Thrive in fast-moving environments and take pride in shipping quickly without sacrificing quality
  • Have a keen eye for clean, scalable developer experiences
  • Enjoy working collaboratively but are confident operating independently when needed

⭐️ Bonus Points For

  • Experience at a high-growth SaaS startup
  • Familiarity with OpenAPI , Conjure (Palantir), or Smithy (AWS)
  • Background building tools or platforms used by other developers

Tech Stack:

  • Microservices: Express (Node.js), FastAPI (Python)
  • Postgres + Prisma ORM (Database)
  • Anthropic + Bedrock (LLM)
  • AWS (Cloud)

Why This Team?

  • Backed by YC and some of the most respected names in venture capital
  • Led by proven builders from Palantir, Google, and Uber
  • Already working with over 150+ customers , with strong demand and product-market fit
  • A lean, fast-moving team where your impact will be felt immediately
  • Competitive compensation, meaningful equity, and a chance to help shape the early DNA of a category-defining company

Interested in learning more?

  • We’re partnering exclusively with this client to help grow their team. Apply here or reach out directly to start a confidential conversation.

Job Tags

Immediate start,

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