Senior Backend Engineer (NodeJS) at Helium Health

Responsibilities

• Design, build, and maintain scalable, secure, and high-performance backend services using Node.js and TypeScript.
• Develop and maintain RESTful APIs and integrate with internal and third-party services.
• Design and optimize data models and services using PostgreSQL/MySQL, MongoDB, and Redis.
• Build reliable, maintainable, and well-tested software with appropriate unit, integration, and API testing.
• Design and evolve scalable architectures, including microservices and event-driven systems where appropriate.
• Deploy and operate backend services in AWS/cloud environments, working with CI/CD and containerization.
• Monitor and optimize applications for performance, scalability, availability, and reliability.
• Collaborate with Product, Frontend, QA, DevOps, and other teams to deliver high-quality products.
• Participate in code reviews, technical design, and architecture decisions.
• Mentor and provide technical guidance to junior and mid-level engineers.
• Leverage AI-assisted development tools to improve engineering productivity, code quality, testing, and problem-solving.

Requirements

• Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience with 5+ years of professional backend/software engineering experience.
• Strong hands-on experience with Node.js and TypeScript.
• Python experience is a plus, particularly in AI/ML, automation, and data-intensive applications.
• AI-native experience is a strong plus; experience building products or backend services where AI/LLMs are a core part of the product or workflow, including integrating AI APIs, RAG, agents, embeddings, or similar technologies
• Strong experience designing and developing REST APIs and integrate with internal and third-party services.
• Experience with relational and NoSQL databases, particularly PostgreSQL/MySQL and MongoDB.
• Experience with infrastructure and deployment tooling 
• Experience with Redis or other caching technologies.
• Good understanding of microservices, distributed systems, and event-driven architecture.
• Experience with AWS/cloud platforms, Docker, Git, and CI/CD.
• Experience with automated testing and writing clean, maintainable, production-ready code.
• Strong understanding of security, authentication, authorization, and API best practices.
• Strong problem-solving, communication, and collaboration skills.
• Familiarity with AI-assisted development tools such as GitHub Copilot, Cursor, Claude, or ChatGPT.