Sully.ai

Staff Software Engineer, Full-Stack – AI Systems

Sully.ai

full-time

Posted on:

Location Type: Remote

Location: Remote • 🇺🇸 United States

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Salary

💰 $200,000 - $230,000 per year

Job Level

Lead

Tech Stack

AWSAzureCloudGoogle Cloud PlatformNode.jsPythonReactTypeScript

About the role

  • Architect and implement cross-agent systems that power core Sully.ai experiences.
  • Build and scale full-stack product components using TypeScript/React and Python services.
  • Design, implement, and optimize core components across frontend, backend, and model integrations, while driving engineering direction in close collaboration with our co-founders.
  • Integrate LLMs into production workflows with strong contracts, observability, and test coverage.
  • Develop shared UI components and typed SDKs to unify cross-agent experiences.
  • Lead engineering direction, collaborating with founders and cross-functional stakeholders.

Requirements

  • Staff/Principal-level full-stack experience in React, TypeScript, and Node.
  • Proven ability to design, ship, and scale LLM-powered applications.
  • Expertise in API design, streaming, and CI/CD pipelines.
  • Strong cloud infrastructure background (AWS, GCP, or Azure).
  • Track record of building reliable systems with measurable performance and error budgets.
  • Experience with WebRTC or audio-aware UI design is a nice-to-have.
  • Hands-on work with agentic AI frameworks is a nice-to-have.
  • History of creating design tokens, SDKs, or cross-agent platforms is a nice-to-have.
Benefits
  • Offers Equity 📊 Resume Score Upload your resume to see if it passes auto-rejection tools used by recruiters Check Resume Score

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard skills
TypeScriptReactPythonNodeAPI designLLM-powered applicationsCI/CD pipelinescloud infrastructureWebRTCagentic AI frameworks
Soft skills
leadershipcollaborationengineering directioncommunication