Senior Product Designer — AI Dev Tools (Remote, Equity)

castaigroupinc; United States; Remote; USD 49,000 - 80,000; Full time

Benefits offered by this job

Equity options

Remote-first environment

Learning budget

Annual hackathon

Team-building budget

Job summary

castaigroupinc is seeking a Senior Product Designer to join a small, senior design team focused on an AI-driven coding platform for engineering and platform teams. You’ll own end-to-end design across a CLI agent, desktop app, inference/spend console, and IDE tooling, applying a strong point of view in ambiguity while remaining hands-on with the codebase.

You will lead user research end-to-end, prototype in code when faster, and contribute to strategic product conversations with evidence from

Qualifications

• Portfolio or case study showing senior-level design work on developer tools, AI or LLM products.
• Own research end-to-end — not just contributing to studies run by someone else — and using it to influence product direction.
• Comfort working directly with AI-assisted development workflows, and genuine interest in staying hands-on with the codebase rather than only handing off specs.
• Demonstrated ability to operate with a strong point of view under ambiguity and make a defensible call without leaning on a fixed process.
• Experience designing for technical, engineering-savvy users and holding your own in conversations about APIs, architecture, and system constraints.
• Strong async communication: short, clear documents that make a case in writing as convincingly as in a meeting.

Responsibilities

• Own problems end-to-end across the product surface — CLI, desktop app, inference and spend console, or developer tooling — from research through shipped design and measured outcome.
• Lead user research initiatives independently: plan them, run them, synthesize findings, and turn them into a clear case for what the product should do next.
• Prototype directly in code using AI-assisted workflows when that is faster than static mockups, to test ideas in the actual product.
• Bring a strategic point of view to product conversations, grounded in research evidence, direct product usage, and competitor awareness.
• Participate in cross-squad design reviews to surface overlap early, raise the quality bar, and stay aware of what other designers are building.
• Track design debt in owned areas and push for prioritization when risk factors or user feedback make it urgent.

Skills

Senior design

Developer tools

AI/LLM products

Coding agents

SaaS for engineers

Job description

castaigroupinc is seeking a Senior Product Designer to join a small, senior design team focused on an AI-driven coding platform for engineering and platform teams. You’ll own end-to-end design across a CLI agent, desktop app, inference/spend console, and IDE tooling, applying a strong point of view in ambiguity while remaining hands-on with the codebase.

You will lead user research end-to-end, prototype in code when faster, and contribute to strategic product conversations with evidence from