Staff Engineer, Full Stack

About Sonder Mind

At Sonder Mind, we believe everyone deserves one personalized, connected, and effective mental health destination to take care of their mental health and well-being at any stage of life. Sonder Mind care encompasses everything from therapy and medication management to meditation and mindfulness exercises. Our clinicians leverage our digital tools and research to deliver increasingly high-quality care and to develop thriving practices.

Combining technology and human connection, Sonder Mind drives better outcomes through our comprehensive approach. Learn more about Sonder Mind at  or download the mobile app, available on iOS and Android. To follow the latest Sonder Mind news, get to know our clients, and learn about what it's like to work at Sonder Mind, you can follow us on Instagram, Linkedin, and Twitter.

Additionally, we expect all team members to effectively leverage modern AI technologies as part of their everyday workflow, and to continuously adapt as new tools emerge. Familiarity with job-relevant AI platforms such as Gemini, ChatGPT, Claude, Git Hub Copilot or other industry-standard AI productivity tools is expected and considered essential for success at this company.

About the Role

Step into a groundbreaking role at the forefront of revolutionizing mental healthcare. Sonder Mind is seeking a Staff Full Stack Engineer (Software Engineer IV) to join our innovative team in building AI-powered tools that truly partner with therapists. You won't just be coding features-you'll be helping architect the future of therapy by developing software that acts as an intelligent copilot, enhancing provider capabilities and transforming the lives of countless clients.

Your contributions will drive product enhancements, optimize customer acquisition, and position us as leaders in redefining the intersection of technology and mental health. This is your opportunity to make an immediate, meaningful impact on the design, implementation, and strategic direction of AI-assisted therapy.

Join a passionate team engaged in cutting-edge design and architecture discussions, explore emerging technologies to enhance our platform, and contribute to a mission-driven organization that values collaborative debate, shared success, and societal impact in mental health.

What you'll do

* Build end-to-end full-stack features (Angular/Type Script, CSS, Node.js, Python, Ruby on Rails, Postgre

SQL) with a strong front-end focus, delivering user-centric experiences.

* Collaborate with the UX team on design systems and partner cross-functionally with Product, Engineering, and Applied Science.

* Own the full software lifecycle-design, build, test, and operate-while maintaining high code quality through unit, functional, and end-to-end tests.

* Identify and implement AI-driven solutions that streamline provider workflows and reduce administrative burden. Mentor junior engineers via code reviews and pair programming, and champion internal standards for style, maintainability, and best practices.

* Ship features consistently with minimal guidance, troubleshoot issues through data and code analysis, and evaluate emerging tools and technologies.

What does success look like?

* Writes maintainable code and tests

* Provides helpful, timely code reviews. Consistently follows best practices, able to defend technical decisions in code review feedback.

* Contribution towards design patterns and architecture decisions to minimize tech debt and maximize development speed

* Successful feature delivery towards key business metrics and OKRs

* Collaborate with teammates and stakeholders to deliver a solid product

* Lead specific team projects independently and in collaboration with other leads

* Accountable, end-to-end ownership of features through planning, deploy, maintenance, and monitoring potential issues

Who You Are

Required:

* 8+ years of experience as a full-stack engineer, specializing in UI development, scalable front-end architecture, and design systems.

* Proficient in Type Script/Angular.

* Prior experience with Ruby on Rails / Willingness to learn.

* Experience with relational databases like Postgres

* Highly motivated to learn how to build the agentic application and experience of LLM applications.

* Ability to clearly and concisely communicate about complex technical, architectural, and/or organizational problems and propose thorough, iterative solutions

* Proven ability to work closely with other Engineers, Product Managers, and other Stakeholders

* Proven ability to thrive in fast-growing, product-driven companies by effectively navigating loosely defined tasks and managing competing priorities or deadlines.

Preferred:

* MS in Computer Science or related field.

* Strong experience developing and documenting design systems (e.g., Storybook, Iris)

* Experience leveraging AI coding assistant tools (e.g., Cursor, Claude)

* Prior experience with programming languages like C++ , Java or Go ( preferred, not required)

* Experience working with Ruby on Rails, Postgres…