Senior Fullstack Engineer (Next.js/AI Agents)

Apply for the Senior Fullstack Engineer (Next.js/AI Agents)
We're looking for a product-minded fullstack engineer to join a fast-moving team building AI-powered products at the intersection of great UX and applied AI. This role is heavy on product thinking, UI craft, and building with multi-agent systems and LLMs — not on infrastructure or distributed systems work. You'll be working across a modern Next.js/React stack while designing agentic workflows and MCP server integrations, so strong instincts for both clean interfaces and reliable AI system design are essential. This is a great fit for someone who loves building polished, delightful products and is excited to work at the leading edge of applied AI (multi-agent systems, RAG, voice agents).
Key Responsibilities
- Design, build, and ship fullstack features across the product, from UI to backend logic
- Build and maintain agentic workflows, including multi-agent systems and MCP server integrations
- Collaborate closely with design to implement polished, animated, high-quality UI using Material UI and Figma specs
- Build and maintain RAG pipelines and integrations with multiple LLM providers (Gemini, GPT, Claude, Perplexity)
- Work with async job processing (Inngest) and Postgres-backed data models
- Contribute to internal tooling and back-office workflows (Retool)
- Partner with product and design to translate requirements into technical solutions
- Write clean, maintainable code and participate in code review
Core Requirements
- Strong experience with Next.js (Pages Router) and React 18
- Experience building and reasoning about multi-agent AI systems and agentic workflows
- Solid backend experience with Postgres and building APIs (e.g., Next.js API routes)
- Strong product sense and a genuine interest in UI quality, animation, and design systems
- Experience integrating with LLM APIs (e.g., OpenAI, Anthropic, Gemini) and/or RAG pipelines
- Excellent written and verbal communication skills in English
- Ability to work independently in a remote, fast-paced environment
Nice-to-Have
- Experience designing or building MCP (Model Context Protocol) servers
- Experience building voice agents
- Familiarity with Material UI and translating Figma designs into production UI
- Experience with async job frameworks like Inngest
- Familiarity with Qdrant or other vector databases for RAG
- Experience using AI coding tools like Codex or Claude Code
- Experience with Retool or similar internal tooling platforms
Additional
- US Timezone Overlap: Required overlap with 9am–3pm PT (GMT-7)
- This role is not infrastructure-heavy — you won't be working on massive distributed systems or large-scale data problems. The ideal candidate is more energized by product craft, UI polish, and applied AI than by backend scale challenges.