Full Stack Engineer - AI Integrations

About the role

p> strong>Compensation /strong>: Competitive base salary based on experience /p> p> br> /p> p> strong>ABOUT PERFORMANCE AI /strong> /p> p> strong>Mission /strong>: make Performance AI easier to run internally and easier for customers to adopt successfully. /p> p>Performance AI helps organizations deploy governed AI workflows across business operations, customer delivery and enterprise systems. We work with real customers in healthcare, enterprise operations, and regulated /p> p>environments where AI adoption must be governed, measurable, and operationally useful. /p> p> br> /p> p> strong>ABOUT THE ROLE /strong> /p> p>This is a high-ownership engineering role for someone who thrives at the intersection of full-stack development and AI systems. You will build the interfaces, backend services, and AI pipelines that power Performance AI s platform - from intuitive front-end experiences to the retrieval, reasoning, and integration layers that make our AI useful in the real world. /p> p>This is not a support or maintenance role. It is for someone who takes architectural ownership, ships /p> p>production-quality code, and can navigate complexity across frontend, backend, and AI layers simultaneously. /p> p> br> /p> p> strong>WHAT YOU LL OWN - FRONTEND DEVELOPMENT /strong> /p> p>- Build modern, responsive user interfaces using React.js, Next.js, and TypeScript. /p> p>- Implement server-side rendering (SSR) and static site generation (SSG) using Next.js. /p> p>- Translate UI/UX designs into high-quality, reusable components with Tailwind CSS or styled systems. /p> p>- Develop intuitive interfaces for AI-powered features, including chat experiences, workflow builders, and data interaction layers. /p> p> br> /p> p> strong>WHAT YOU LL OWN - BACKEND DEVELOPMENT & AI INTEGRATIONS /strong> /p> p>- Design, architect, and maintain modular, scalable, and secure backend services using Node.js, Express, and TypeScript, following clean module-based folder structures. /p> p>- Build robust RESTful and GraphQL APIs with industry-standard validation using Joi, centralized error handling, and async/await patterns. /p> p>- Lead development of integration layers connecting external systems - Google Drive, OneDrive, and third-party APIs - into unified workflows. /p> p>- Collaborate with cross-functional teams to deliver end-to-end solutions and own technical decisions across backend architecture, integrations, and AI systems. /p> p>- Design and implement RAG (Retrieval-Augmented Generation) pipelines, including data ingestion, chunking, embedding, indexing, and retrieval strategies. /p> p>- Build and orchestrate LLM-powered workflows using LangChain and LlamaIndex, including multi-step reasoning, tool usage, and agent-like behaviors. /p> p>- Integrate structured and unstructured data sources into AI systems with a focus on context relevance and /p> p>performance. /p> p>- Optimize prompt design, response quality, latency, and cost for production LLM applications. /p> p>- Optimize data access layers for MongoDB (aggregation pipelines, indexing, transactions) and MySQL (joins, indexing strategies, query optimization). /p> p>- Implement microservices and event-driven systems using queues, background workers, and efficient /p> p>communication patterns. /p> p>- Containerize backend services using Docker, maintain environment parity across dev/staging/production, and implement CI/CD workflows. /p> p>- Integrate Stripe and other payment gateways with secure webhook handling, subscription logic, billing flows, and PCI-friendly design patterns. /p> p>- Develop healthcare EMR integrations using HL7/FHIR with a strong focus on compliance, data normalization, mapping, and secure API interactions. /p> p>- Work with blockchain technologies (Ethereum via ethers.js) to implement wallet flows, contract interactions, event listeners, and secure on-chain/off-chain data orchestration. /p> p> br> /p> p> strong>WHAT WE RE LOOKING FOR /strong> /p> p>- 5+ years of full-stack engineering experience with production-grade React/Next.js and Node.js/TypeScript applications /p> p>- Hands-on experience building and deploying RAG pipelines, LLM integrations, or AI-powered products /p> p>- Solid understanding of API design (REST and GraphQL), async patterns, and backend architecture /p> p>- Experience with MongoDB and/or MySQL at scale, including schema design and query optimization /p> p>- Familiarity with Docker, CI/CD pipelines, and maintaining environment parity across deployment stages /p> p>- Strong written communication and ability to work autonomously across time zones /p> p>- High ownership, urgency, and follow-through - you ship and you care about quality /p> p> br> /p> p> strong>STRONG PREFERENCE FOR /strong> /p> p>Experience with healthcare data standards (HL7/FHIR); blockchain/Web3 integrations (ethers.js, Solidity); payment gateway integrations (Stripe); LangChain or LlamaIndex in production; or experience in regulated industries such as healthcare, f