Senior Full Stack Engineer, Slingshot AI
3-5 days a week in office
Foundational model for psychology
Open for applications
Foundational model for psychology
1-20 employees
Open for applications
3-5 days a week in office
1-20 employees
Company mission
To use AI to make Mental Health Care more accessible.
Role
Who you are
- 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
- And navigate the nitty-gritty of mobile app development, such as offline functionality, push notifications, or deep linking
- You're highly autonomous and love tackling big, ambiguous problems
- You don't wait for someone to tell you what to do—you figure it out
- You're always learning and happy to pick up new tools and frameworks on the go
- You're a team player who cares deeply about product quality and impact
- You take ownership of your work, but you're always thinking about how it fits into the bigger picture and how to move the whole product forward
- You can ship fast. We work at lightning speed
- 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
- Experience working in a fast-paced, <100 person startup environment, is a strong plus
- You want to build things that matter. 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
- You want direct exposure and mentoring from a founding team with a successful exit and track record (Neil scaled Casper through IPO)
- You care about our mission, and are willing to do what it takes to make it happen
What the job involves
- 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
- We use gRPC and GCP (Kubernetes, Cloud Run) as our primary cloud provider
- You’re not required to be an expert in all of these tools, but we would like you to come with a learning mindset and to not be afraid of getting your hands dirty with whatever tool the job might require
Our take
Use-cases of machine learning in the previous three decades have gone from the impressive but impractical achievements of beating Chess Grand Masters to being integral to some of the world’s most used commercial applications like Google Search.
Slingshot is taking Large Language Models in a new direction, using its machine-learning tools to train generative AI in deep psychology. The aim is to build machine learning models that can perform modern therapy through Ash, set to be the first AI counselor, driving down the cost of mental healthcare.
Slingshot is attempting to democratize access to mental health care through the increasingly complex capabilities of ML. What started for Slingshot as a general exploration of machine learning has developed into a potentially significant and singular product. Whilst the proof will be in the pudding, Ash still being in development, Slingshot has won investor confidence evidenced by its $6 million seed fundign round in 2022.
Freddie
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 3 rounds)
Jan 2025
$40m
SERIES A
Aug 2024
$30m
SEED
Total funding: $76.2m
Company benefits
- Hybrid environment, highly collaborative, fast-paced culture
- Unparalleled growth opportunity - learn faster than you would anywhere else
- Have a massive impact on the next generation of ML engineering
- Work with a passionate team that cares about creating an AI world that's not winner-takes-all
- Learning and development budget
- Company offsites and events
- Lunch on us when you are in the office
Company HQ
Civic Center, New York, NY
Leadership
Daniel Reid Cahn
(CEO)Graduated with a Master's at Imperial with distinction and an award for novel work in Deep Reinforcement Learning. Prior to Slingshot, they were a Machine Learning Engineer at Instabase filing two patents that redirected the strategy of the company at large.
Neil Parikh
(Co-founder)Neil is co-founder of Casper, the global sleep company which he helped grow to over $500million in revenue and IPO'd in 2020.
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