Senior Fullstack Engineer

LifeStance Health is a leading mental health practice group dedicated to helping individuals and communities with their mental health needs. The Sr. Full Stack Engineer will be responsible for delivering scalable software solutions across web and backend layers, collaborating with cross-functional teams to enhance user experiences and ensure technical excellence.

Responsibilities:

• Develop and maintain scalable, high-quality software solutions across the full stack (Node.js, TypeScript, React, microservices, and cloud infrastructure)
• Mentor and support junior engineers through collaborative processes like code reviews and pair programming
• Execute autonomously, taking ownership of feature development, technical design, and implementation while collaborating with cross-functional stakeholders
• Write clean, maintainable, and well-tested code, ensuring the reliability, performance, and security of our applications
• Architect and implement backend services and APIs, integrating with external and internal systems while adhering to best practices in microservice development
• Ensure front-end excellence, developing modern, responsive web applications that enhance user experience
• Troubleshoot and resolve issues proactively, minimizing downtime and ensuring system reliability
• Collaborate with product managers and designers to understand requirements and translate them into technical implementations that align with business goals
• Contribute to technical discussions, code reviews, and architectural decisions, fostering a culture of engineering excellence
• Stay current on emerging technologies and industry trends, continuously improving your skills and applying best practices

Requirements:

• 5+ years of experience in full stack development, with strong proficiency in Node.js, TypeScript, React, and microservice architectures
• Experience with React workflows via Redux/Flux
• Strong front-end development experience, including modern JavaScript frameworks, UI component design, and performance optimization
• Deep understanding of backend development, including RESTful APIs, asynchronous processing, and database interactions
• Proficiency in cloud-based architectures (AWS preferred), containerization, and serverless computing
• Ability to work independently, managing tasks efficiently with minimal supervision
• Strong problem-solving skills and the ability to troubleshoot complex issues across the stack
• Experience with DevOps practices, including CI/CD pipelines, logging, and monitoring solutions
• Collaborative mindset, excellent communication skills, and an eagerness to contribute to a team-oriented culture
• Experience with GraphQL, WebSockets, and event-driven architecture
• Familiarity with Kubernetes, Terraform, or Infrastructure as Code (IaC) tools
• Background in building highly available, scalable, and secure applications
• Prior experience working in a healthcare, behavioral health, or regulated industry environment