Senior Software Engineer (Contract to Hire)
Company:Sully.ai
Location:US, EST, PST
Languages:English
Seniority level:Senior, Senior-level
Experience:Senior-level
Skills:
AWSBackend DevelopmentPythonArtificial IntelligenceCloud ComputingFrontend DevelopmentFull Stack DevelopmentGCPMachine LearningReact.jsSoftware ArchitectureTypeScriptAzureCI/CDDevOps
Requirements:
Senior-level full-stack experience in React, TypeScript, and Node.js 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
Responsibilities:
Design, implement, and optimize core components across frontend, backend, and model integrations Drive engineering direction in close collaboration with co-founders Audit current cross-agent flows for UI/UX cohesion Implement shared components and typed contracts for reliability Establish instrumentation for frontend performance and model round-trip tracing Deliver end-to-end tested, production-grade agentic workflows with <5% error rates Launch cross-agent design system and SDK used by at least 2 internal teams Establish weekly “deploy and measure” cadence with performance metrics and error budgets
