Full Stack Engineer

Apply Here: https://refibuy-inc.breezy.hr/p/2bf286845f67-full-stack-engineer

Full Stack Engineer — Raleigh, NC · In-office · Full-time

Hey — Scot here, CEO and co-founder of ReFiBuy. 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.

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 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. Comfort with async + a couple of early/late calls a week is part of the job.

About the role

You'll help us build an AI-native, agentic ecommerce platform end-to-end — shipping features across a Next.js / TypeScript 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 want builders who own the whole feature — schema to UI to telemetry to rollout.

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.

Our stack

• Frontend: Next.js, React, TypeScript, Tailwind / shadcn, SSR/ISR, server components, plus a Chrome extension surface.
• - Backend: C# / .NET 9 on .NET Aspire, microservices, minimal APIs, DI, background workers, feature-flagged rollouts.
• - Data: PostgreSQL, Redis, Neo4j, vector stores.
• - Eventing: Event-driven Dapr architecture with pub/sub.
• - AI-native: AutoGen, Semantic Kernel, frontier LLMs (OpenAI / Anthropic / Google), retrieval, function/tool calling, prompt + response evals, agent orchestration in production.
• - Integrations: Shopify, Bloomreach, PowerReviews, Google UCP, OpenAI Catalog Feed, marketplace + retailer feeds.
• - Cloud / Platform: Azure, AWS, Supabase, Fly.io, Docker.
• - DevEx: GitHub monorepo, GitHub Actions, trunk-based dev with feature flags, Linear for cycles + tickets.
• - Observability: OpenTelemetry tracing/metrics/logs, dashboards, and a growing fleet of internal Claude-powered ops agents.

What you'll do

• Build product experiences in Next.js + TypeScript with polished UX.
• - 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, Q&A automation, and the Visibility / Quality / Digital Shelf scoring loop.
• - Build the multi-engine monitoring layer — measuring 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.
• - Work on Reinforcement Learning with AI Feedback Loops as your main gig, not a 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.

Minimum qualifications

• 3+ years shipping production apps with modern TypeScript/React or C#/.NET.
• - Solid grasp of SSR, state management, API design, and relational data modeling.
• - Hands-on experience with at least one LLM API and an agent or RAG pattern — even side projects count, but you've actually wired up tool calling and seen what breaks.
• - Comfort with containers, cloud deploys, Git, code review hygiene, and automated testing fundamentals.

Nice to have

• Next.js App Router, React Server Components, Tailwind / shadcn.
• - .NET 9 + .NET Aspire, minimal APIs, background jobs, Clean Architecture, CQRS.
• - Event-driven messaging with Dapr (or Kafka / NATS / SNS+SQS).
• - Production agent work: AutoGen, Semantic Kernel, LangChain, or your own framework. Bonus for evals, guardrails, and cost/latency tuning.
• - Vector DBs, RAG, hybrid retrieval, response evaluation.
• - Ecommerce: catalogs, marketplaces (Amazon / Walmart / eBay), feeds, attribute taxonomy, retailer integrations.
• - Linear / cycle-based planning, feature-flag-driven release engineering, on-call comfort.

How we work

Builder culture → fast iterations, small PRs, daily deploys, trunk-based development, feature flags as the default rollout mechanism. We run on Linear cycles and we keep the PR review queue tight. We're in the office because we believe the best work happens at a whiteboard with the team you're shipping with.

Benefits

• Healthcare — Three BCBS plans. ReFiBuy covers 80% of the base plan.
• - Dental, Vision, and Life Insurance available alongside the medical plans.
• - 401(k) through Human Interest with a company match (100% up to 1% + 50% up to 5%). No vesting.
• - Incentive Stock Options (ISOs) — 4-year vesting, quarterly.
• - PTO — 15 days/year, accruing each pay period, up to a 120-hour cap.
• - Parking covered by ReFiBuy.
• - Office at 509 W. North St, Raleigh, NC 27603 (Glenwood South).
• Note: Benefits are eligible 30 days after start.

About ReFiBuy

ReFiBuy is the Agentic Commerce Optimization (ACO) platform for brands, retailers, and agencies. We help commerce teams compete and win in a world where AI shopping agents — ChatGPT, Perplexity, Gemini, Copilot, Claude, and whatever ships next month — increasingly decide what gets discovered, recommended, and purchased.

We were founded by four ecommerce operators with serious mileage — ChannelAdvisor, Rithum, MikMak, and Walmart. We're working with real brands and retailers today, on real catalogs, in production.

If this sounds like your kind of room, send us your resume and a few links to things you've shipped — bonus points for an agent or LLM project, even a weekend one.

— Scot Wingo, CEO

Apply Here: https://refibuy-inc.breezy.hr/p/2bf286845f67-full-stack-engineer