Lead / Principal Full-Stack Engineer (Node.js & Next.js) - Remote (South America)

**Location: Remote (South America)** This role is open to candidates worldwide. We hire across multiple countries and regions, including South America (LATAM), Asia, and other approved locations. Platform \& Product Engineering — LumiMeds Location: Remote / Hybrid Seniority: Staff / Principal (IC \+ Tech Leadership) **Role Overview** LumiMeds is a high\-growth telehealth platform building the next generation of virtual telehealth infrastructure. We are looking for a Principal Full\-Stack Engineer to lead our technical architecture and delivery. In this role, you will be the technical owner of our core platforms. You are expected to be a force multiplier: writing high\-impact code, designing resilient systems, and leveraging AI\-assisted development (Cursor, Copilot, LLMs) to maintain a high velocity. You will balance 70% hands\-on architecture/coding with 30% team leadership and mentorship.Core Technical Domains (Project Scope) You will architect and scale the following critical healthcare systems: * **EMR \& Clinical Data Engine:**  Designing high\-availability Electronic Medical Record (EMR) systems with complex data modeling for patient history and clinical notes. * **Prescription Management (e\-Prescribing):**  Building secure, auditable workflows for medication orders, pharmacy integrations, and state\-machine\-based fulfillment tracking. * **Virtual Care Infrastructure:**  Implementation of real\-time patient\-provider interfaces, including WebRTC video, secure messaging, and async consultation flows. * **AI Clinical Copilot:**  Integrating LLMs to automate clinical documentation, summarize patient charts, and optimize provider workflows. * **Billing \& Claims:**  Engineering logic for insurance eligibility, automated medical coding, and secure payment processing. **Key Responsibilities** * **Architecture \& Design:**  Own the end\-to\-end technical roadmap for Node.js backends and Next.js frontends. Ensure the system is modular, scalable, and secure. * **Technical Leadership:**  Manage the engineering backlog, conduct rigorous code reviews, and unblock the team on complex technical hurdles. * **AI Integration:**  Lead the adoption of AI\-driven development practices and build AI\-powered product features to improve clinical efficiency. * **Production Excellence:**  Define and enforce standards for API contracts, database schema migrations, CI/CD pipelines, and system observability. * **Compliance \& Security:**  Ensure all systems meet HIPAA/SOC2 standards, focusing on data encryption, audit logs, and PII protection. **Required Hard Skills \& Tech Stack** **Backend \& API:** * Node.js Mastery: Deep expertise in runtime performance, event\-driven architecture, and TypeScript. * API Design: Expert knowledge of RESTful, GraphQL, and TypeSafe APIs (tRPC). * Database: Advanced PostgreSQL (complex joins, indexing strategy, performance tuning) and Redis for distributed caching. **Frontend:** * Next.js \& React: Expert\-level knowledge of App Router, Server Components (RSC), and hydration optimization. * State Management: Expertise in Zustand, TanStack Query, or similar. **Infrastructure \& AI:** * Cloud \& DevOps: Professional experience with AWS (EC2, RDS, Lambda, S3\), Vercel, and GitHub Actions. * AI Tools: Proven ability to integrate LLM APIs (OpenAI/Anthropic) into production environments. **Candidate Qualifications** * 8\+ years of professional software engineering experience. * 2\+ years in a Lead, Staff, or Principal role. * Full\-Stack Capability: Equally comfortable in deep backend logic and high\-performance frontend engineering. * High Agency: Ability to operate in ambiguous environments and make high\-leverage decisions without constant supervision. * Communication: Professional proficiency in English for technical documentation and collaboration. **Why Join LumiMeds?** * High Complexity: Work on "hard" engineering problems involving real\-time data, complex state machines, and high\-stakes reliability. * Tech\-First Culture: We value engineering excellence and encourage the use of cutting\-edge AI tools to solve problems faster. * Direct Impact: Your architecture will directly affect patient outcomes and the efficiency of healthcare providers.