Senior Frontend Software Engineer, AI UX @ Pebl

What Makes You a Great Fit

• 8+ years of professional software engineering experience, full-stack, with demonstrated strength and a clear preference for frontend/UX work.
• 1+ years of hands‑on experience building LLM‑powered or agentic products — not just calling an API, but designing how an agent reasons, uses tools, and hands control back to the user.
• Experience building interfaces for AI‑powered or agentic products — conversational UIs, copilots, assistants — including exposure to generative/dynamic UI techniques where the interface adapts to model behavior.
• Solid understanding of LLM design patterns, prompt engineering, and observability/instrumentation for agentic systems.
• Strong command of modern frontend (React/TypeScript) paired with a solid understanding of how frontends integrate with backend services, APIs, and real‑time/streaming data.
• A track record of helping build products beyond standard CRUD apps and dashboards — something with real craft, polish, or a distinctive user experience.
• Comfort working across the full stack when needed (backend, infra) — this isn’t a pure frontend role.
• A lean mindset — focus on delivering customer value by minimizing waste, optimizing workflows, fostering continuous improvement, and prioritizing quick iteration with quick feedback cycles.
• Excitement for working in a space that’s evolving rapidly, where the best patterns for AI‑driven UX are still being discovered — and a desire to help discover them.

This role will require in‑office collaboration Monday‑Wednesday in our Toronto, Ontario office.

How You’ll Make an Impact

• Design and build full‑stack features for our conversational AI assistant, with particular depth and ownership on the frontend/UX side.
• Apply hands‑on experience with LLM‑based and agentic systems — prompt design, tool/function calling, multi‑step agent reasoning, evaluation — to shape both how the assistant behaves and how that behavior surfaces in the UI.
• Bring product taste and a strong point of view on what makes an AI‑driven experience great — push for a better UX rather than shipping
• Push the boundaries of what conversational and generative AI interfaces can feel like — prototype and propose new interaction patterns as the underlying models and agent capabilities evolve.
• Help shape the future of how people interact with software at Pebl — you’ll be working at the edge of what’s possible in conversational and agentic UX, not maintaining what’s already been figured out.
• Build and maintain both frontend and backend components (TypeScript/React on the frontend; comfortable enough on the backend to design clean contracts and APIs that support agentic workflows).
• Lead by example in clean, maintainable code across the stack; mentor junior team members and foster a culture of constant learning and improvement.
• Contribute to technical discussions, design reviews, and code reviews to maintain high engineering standards.
• Troubleshoot issues end‑to‑end (frontend and backend) in production, including AI‑specific failure modes (e.g., bad model output, latency, dropped tool calls).

Let’s Connect If You Have

• 8+ years of professional software engineering experience, full‑stack, with demonstrated strength and a clear preference for frontend/UX work.
• 1+ years of hands‑on experience building LLM‑powered or agentic products — not just calling an API, but designing how an agent reasons, uses tools, and hands control back to the user.
• Experience building interfaces for AI‑powered or agentic products — conversational UIs, copilots, assistants — including exposure to generative/dynamic UI techniques where the interface adapts to model behavior.
• Solid understanding of LLM design patterns, prompt engineering, and observability/instrumentation for agentic systems.
• Strong command of modern frontend (React/TypeScript) paired with a solid understanding of how frontends integrate with backend services, APIs, and real‑time/streaming data.
• A track record of helping build products beyond standard CRUD apps and dashboards — something with real craft, polish, or a distinctive user experience.
• Comfort working across the full stack when needed (backend, infra) — this isn’t a pure frontend role.
• A lean mindset — focus on delivering customer value by minimizing waste, optimizing workflows, fostering continuous improvement, and prioritizing quick iteration with quick feedback cycles.
• Excitement for working in a space that’s evolving rapidly, where the best patterns for AI‑driven UX are still being discovered — and a desire to help discover them.

Our Commitment to You

At Pebl, we’re committed to supporting our team with comprehensive rewards and benefits designed to meet