We're a team of machine learning engineers training task-specific generative models for psychology. Our goal is to build an AI therapist to help people change their mind and their lives in the ways that they want to. We partner with organizations around the globe and power use cases, including AI-assisted crisis text response, while securing best-in-class datasets to power our models. We're a well-funded, seed-stage startup backed by top-tier tech investors involved in Huggingface, ElevenLabs, Replit, Captions, Shopify, Plaid, Notion, Canva, Twitch, Airtable, and others.
We're building a powerful team by empowering our engineers with the autonomy, flexibility, and resources to do their best work. This is a chance to join a passionate team leveraging cutting-edge AI to improve mental health access globally. As a Senior Full Stack Engineer, you will play a critical role in building the user experience for our AI Therapy application, Ash. You will work closely with our ML team to implement new features, ranging from UX improvements to completely new AI-driven features. As a core member of a small but highly skilled team, we expect you to act as an owner and to care passionately about keeping building meaningful experiences for our end users.
Our tech stack uses Dart/Flutter for our apps, Kotlin for core backend services, Python for our ML work, as well as Rust for low level media streaming. You have experience building and shipping mobile-first consumer apps and are comfortable working across the stack and designing end-to-end user features. Experience with modern multi-platform frameworks like Flutter, React Native, Ionic, or similar is a big plus.
You understand the broader picture of software development—things like app performance, UX tradeoffs, analytics, and crash reporting. You're a team player who cares deeply about product quality and impact. You can ship fast. 3+ years of software development experience, with a strong focus on mobile-first applications.
~ Experience building and maintaining consumer-facing apps using modern development frameworks (e.g., React, Vue, Ionic, Flutter, Kotlin Multiplatform, etc.).
~ JVM experience is a plus (Java, Kotlin), or at least a strong willingness to learn.
~ Based in London or New York - we’re operating on a hybrid basis but love spending time together in person.
~ You love seeing your creations come to life and get used, whether that’s a small prototype demonstrator or foundations behind the scenes.
You want first hand experience of AI and Machine Learning in practice. You’ll be part of a team that pushes the frontiers of how modern AI can be employed to make a difference.
Competitive compensation (90th percentile).
Hybrid environment, highly collaborative, fast-paced culture.