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Pebl is a global work platform that uses AI to help companies hire, pay, and manage employees across 185+ countries. The company is building Alfie, a conversational AI assistant, and seeking a Senior Frontend Software Engineer to lead the design and development of user-facing AI experiences.
In this role, you'll own the frontend and UX strategy for conversational AI interfaces, working full-stack but with primary focus on frontend/product engineering. You'll design and build features that handle streaming responses, error recovery, fallback states, user trust, and human-in-the-loop interactions. Your work will shape how users interact with agentic systems—moving beyond standard chatbot patterns to define what AI-native UX should look like.
Key responsibilities include: designing full-stack features with deep frontend ownership; applying hands-on LLM and agentic system knowledge (prompt design, tool calling, multi-step reasoning) to shape both assistant behavior and UI representation; bringing strong product taste to push for exceptional UX rather than shipping incremental solutions; prototyping and proposing new interaction patterns as model capabilities evolve; building and maintaining TypeScript/React frontend and supporting backend components; mentoring junior engineers; and troubleshooting end-to-end issues including AI-specific failure modes.
You'll need 8+ years of professional software engineering experience with demonstrated strength in frontend/UX work, plus 1+ years building LLM-powered or agentic products (beyond simple API calls). Experience building conversational UIs, copilots, or assistants is essential. You should have solid understanding of LLM design patterns, prompt engineering, and observability for agentic systems. Strong React/TypeScript skills paired with backend integration knowledge, a track record of building distinctive user experiences, comfort working full-stack, and excitement for rapidly evolving AI-driven UX patterns are all important.
Perbl offers flexible time off, parental leave, health and dental insurance, retirement savings, and an employee incentive plan.
