Fullstack Engineer

Position Overview

Note: No recruiters please. Applicants must have permanent work authorization in the US as we do not sponsor visas. This is an in-office position based in Raleigh, NC/Triangle area; candidates not local must relocate at their own expense.

Join us at ReFiBuy to build an AI-native, Agentic e-commerce platform. You’ll ship end-to-end features across a Next.js/TypeScript frontend and a C#/.NET backend, powering a cutting-edge, event-driven, multi-tenant SaaS platform that values rapid iteration, strong ownership, and real customer impact. Our tech stack includes Next.js, React, TypeScript, C#/.NET 9, PostgreSQL, Redis, Neo4j, and advanced AI-native components such as AutoGen, Semantic Kernel, and vector databases.

Key Responsibilities

• Build product experiences using Next.js and TypeScript with a polished UX.
• Design resilient .NET services and event-driven workflows with considerations for idempotency, retries, and DLQs.
• Integrate and evaluate LLMs/agents including retrieval systems, tools, and guardrails.
• Own features end-to-end: from schema and design to API contracts, tests, telemetry, rollout, and learnings.
• Contribute to platform and developer experience by enhancing CI/CD pipelines, preview environments, code generation/AI coding tools, and internal libraries.

Required Qualifications

• 3+ years’ experience with modern TypeScript/React or C#/.NET shipping production applications.
• Solid grasp of SSR, state management, API design, and relational data modeling.
• Experience with containers and cloud deployment.
• Proficiency in version control (Git) and automated testing fundamentals.

Preferred Qualifications

• Experience with Next.js App Router, React Server Components, and Tailwind/shadcn.
• Familiarity with .NET 9, minimal APIs, background jobs, Clean Architecture, and CQRS.
• Knowledge of event-driven messaging using Dapr.
• Exposure to vector databases, RAG, LLM tool use/agents, and prompt/response evaluation.
• Experience in e-commerce domains such as catalogs, marketplaces (Amazon/Walmart/eBay), and feeds.

Benefits & Perks

• Health, Dental, Vision: 80% of the base plan is covered by ReFiBuy.
• 401k w/ match: 100% match on contributions up to 1% of salary and 50% up to 5%, with no vesting.
• Incentive Stock Options (ISOs): Early stage startup benefits with 4-year quarterly vesting.
• Parking expenses covered.
• Modern office amenities at our Raleigh location, including a spacious breakroom, hang out areas, and a Wellness room.