Full Stack Engineer

Full Stack Engineer

Raleigh, NC | In-office | Full-time

Hey — Scot here, CEO and co-founder of Re Fi Buy . If you're the kind of engineer who reads release notes for fun, ships on day one, has been quietly building agents on the side, and gets a little restless on teams that talk more than they build — keep reading. Let's dig in.

A few quick notes up front:

• No recruiters, please.
• Applicants must have permanent work authorization in the US. We're not sponsoring visas for this role.

• This is an in-office role. We're default in-office in Raleigh, NC. If you're not in the Triangle, you'd need to relocate at your own expense — we don't have a relocation budget for this seat.

• You’ll work daily with our Dublin engineering team across the Atlantic. Comfort with async + a couple of early/late calls a week is part of the job.

You’ll help us build an AI-native, agentic ecommerce platform end-to-end — shipping features across a Next.js + Type Script front end and a C# .NET 9 back end on .NET Aspire that powers an event-driven, multi-tenant SaaS platform. You’ll spend as much time wiring up production agent workflows (enrichment, scoring, multi-engine monitoring) as you do building UI. We don’t have room for people who want to specialize in one corner — we want builders who own the whole feature: schema to UI to telemetry to rollout.

To be concrete about scale: today we’re running tens of thousands of SKUs through agentic enrichment, distributing optimized catalogs to engines like ChatGPT, Perplexity, Gemini, and Copilot, and tracking visibility back from each one daily. The work is real, the customers are real, and the agents are in production.

• Frontend: Next.js, React, Type Script, Tailwind + shadcn, SSR/ISR, server components, plus a Chrome extension surface for sales/SE workflows.
• Backend: C# .NET 9 on .NET Aspire, microservices, minimal APIs, DI, background workers, feature-flagged rollouts.
• Data: Postgre
  
  SQL, Redis, Neo4j, vector stores.
• Eventing: Event-driven Dapr architecture with pub/sub.
• AI-native: Auto Gen, Semantic Kernel, frontier LLMs (OpenAI / Anthropic / Google), retrieval, function/tool calling, prompt + response evals, agent orchestration in production.
• Integrations: Shopify, Bloomreach, Power Reviews, Google UCP, OpenAI Catalog Feed, marketplace + retailer feeds (and many more in flight).
• Cloud + Platform: Azure, AWS, Supabase, Fly.io, Docker.
• Dev Ex: Git Hub monorepo, Git Hub Actions, trunk-based dev with feature flags, Linear for cycles + tickets.

• Observability: Open Telemetry tracing/metrics/logs, dashboards, and a growing fleet of internal Claude-powered ops agents.

• Build product experiences in Next.js + Type Script with polished UX — the kind that makes customers screenshot it and send it to other vendors and say “Why can’t your UX be this clean?!”.
• Design resilient .NET Aspire services and event-driven workflows — idempotency, retries, DLQs, the unglamorous stuff that keeps agents and feeds honest at 100k+ SKU scale.
• Ship and own production LLM agent processes: catalog enrichment, attribute generation, QA automation, and the Visibility + Quality Digital Shelf scoring loop. Get customers past the “it works on 25 products” phase to running cleanly across tens of thousands.
• Build the multi-engine monitoring layer — how we measure presence and quality across ChatGPT, Perplexity, Claude, META, Gemini, and Copilot.
• Wire up agentic ops: extend the agents that run feed health, PR reviews, backlog audits, and prod monitoring — and add new ones as the team grows.
• Work on Reinforcement Learning with AI Feedback Loops. Do you stop everything and watch or listen when a new Andrej Karpathy pod drops? Come join us on the bleeding edge. Implement this as your main gig and not a fun hobby.
• Own features end-to-end: schema/design, API contracts, evals + tests, telemetry, feature-flag rollout, learnings.
• Contribute to platform and devex: CI/CD, preview envs, AI coding tools, internal libraries.

• 3+ years shipping production apps with modern Type Script/React or C#/.NET.
• Solid grasp of SSR, state management, API design, and relational data modeling.
• Hands‑on experience with…