SiftStack
Software Engineer, Frontend (Agentic AI)
$160K–$200K
San Francisco, CA · Hybrid · Full-time · Posted Oct 27, 2026
- Experience
- 3+ years of professional software engineering experience.
- Visa sponsorship
- Must be a U.S. citizen, lawful permanent resident, or protected individual such as an asylee or refugee, in compliance with ITAR/EAR regulations.
About the job
Build and own frontend experiences for Sift Agents, helping hardware engineers use AI agents to investigate telemetry and review test and flight data.
What you'll do
- Partner with customers and product to translate review workflows into agent capabilities, and own frontend features from MVP through iteration.
- Design and build agentic interfaces for streaming interactions, long-running tasks, interruptions, and explainable agent work.
- Render agent findings alongside large telemetry datasets while maintaining performance; contribute to shared UI components and collaborate on agent-session API design.
What they ask for
- 3+ years of professional software engineering experience.
- Experience building complex, high-performance web applications with React, NextJS, TypeScript, or similar.
- Interest in product ownership, including customer conversations, prioritization, and shipping.
- Attention to interface details such as micro-interactions, latency, and frame-rate performance.
Nice to have
- Shipped LLM-powered features or chat/agentic interfaces.
- Experience with web performance, visualization technologies, modern CSS/component libraries, technical-user tools, or scientific computing and hardware telemetry.
Pay
$160,000 - $200,000 per year (base salary)
Tools
React, NextJS, TypeScript, Web Workers, OPFS, Tailwind, Radix UI, WebGL
AI focus
Build dependable browser-based agentic interfaces for investigating anomalies, reviewing telemetry, generating dashboards and analysis scripts, and surfacing insights; the role is product engineering, not research.
Model-written summary · the original posting is authoritative