Staff Engineer, Full Stack

SonderMind is a company focused on providing personalized mental health care through innovative technology. As a Staff Engineer, you will own end-to-end features across backend services and collaborate with cross-functional teams to design and optimize scalable applications while mentoring junior engineers.

Responsibilities:

• Design, build, and maintain scalable Ruby/Rails, TypeScript/Node, and Python services and RESTful or gRPC APIs that integrate with agentic GenAI systems
• Optimize MongoDB and PostgreSQL queries and service performance
• Collaborate with cross-functional squads to define requirements and deliver features
• You will work on AI Agents, MCP servers and various other AI enabled tools and frameworks and so must be comfortable working with ambiguity and rapidly evolving technologies
• Identify and drive process, architecture, and toolchain improvements
• Mentor junior engineers (code reviews, pair-programming etc)
• Serve as a technical lead for complex projects, balancing scope, risk, and not compromising deliverable quality

Requirements:

• 8+ years building web services or full-stack applications
• Strong hands-on experience in Ruby/Rails, TypeScript/Node, Python or similar backends
• Deep understanding of APIs, PostgreSQL, and some performance tuning
• Proven ability to balance short-term delivery with long-term technical investments and continuous improvement of quality
• Comfortable working in a fast-paced, ambiguous environment where requirements evolve over time
• Excellent problem-solving, communication, and collaboration skills
• Some knowledge of AI/ML is desired but not a requirement
• Experience with LLMs or AI-driven toolchain (Langchain/Langgraph) is highly desirable