Senior Product Engineer

Methodfi; City of London; On-site; GBP 80,000 - 100,000; Full time

Job summary

An innovative mental health solutions company in London is seeking a Senior Product Engineer to join their passionate team. You will work across their tech stack, from mobile applications to internal tooling, improving mental health access globally. The ideal candidate will possess strong engineering experience, thrive in fast-paced environments, and show interest in AI. This role offers competitive compensation and unique perks, including a generous personal therapy budget.

Benefits

Competitive compensation

Travel between NYC / London offices

Free lunch

Generous learning budget

Budget for personal therapy

Qualifications

• Experience building mobile and web applications zero-to-one.
• Familiarity with modern technologies and distributed architectures.
• Self-starter capable of learning new tools and languages quickly.

Responsibilities

• Collaborate with Engineering team to design and launch new features.
• Work across the tech stack from app to internal tooling.
• Investigate and resolve bugs to enhance product stability.

Skills

Strong software engineering experience

Knowledge of multiple programming languages

Experience with microservices

Ability to work in a fast-paced environment

Interest in AI

Tools

Kotlin

Flutter/Dart

Next.js/TypeScript

Python

SQL/NoSQL

Job description

Overview

Slingshot AI is the team behind Ash, the first AI designed for mental health. Our mission is to make support more accessible and help people change their lives in the ways they want.

We’re building a world-class team by empowering individuals with the autonomy, flexibility, and support they need to do their best work. We dream big, iterate fast, and care deeply. If that sounds like you, we’d love to hear from you.

Our team spans machine learning, product, engineering, conversational design, clinical, growth, and operations, with offices in both New York City and London.

We're a well-funded Series A company, having raised $93M from Andreessen Horowitz, Radical Ventures, Forerunner Ventures, plus top-tier tech investors involved in ElevenLabs, Captions, Shopify, Plaid, Notion, Canva, Twitch, Airtable, and many others.

The role

This is a chance to join a passionate team leveraging cutting-edge AI to improve mental health access globally. As a Senior Product Engineer, you will play a critical role in building the systems and services that make the Ash product possible.

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 our systems scalable, performant, and secure. Once you’re embedded in the team, you will get the opportunity to lead projects of your own, with goals to make our products better, faster, and more reliable.

You will have the opportunity to interact and contribute to our entire tech stack. From our backend services (Kotlin), our mobile app (Flutter/Dart), internal tooling (Next.js/TypeScript), and model training pipelines (Python). We use gRPC and GCP (Kubernetes, Cloud Run) as our primary cloud provider.

About you

• Thrive building mobile and web applications zero-to-one. Working with different technologies across the whole vertical, including frontend, databases, and any relevant infrastructure.

• Strong software engineering experience in multiple general-purpose programming languages and with modern technologies and architectures, e.g. microservices, message queues, caching layers, and databases (ideally, SQL and NoSQL)

• Driven by building a world-class product with a world-class team, want to own what you build, and you’re comfortable building and throwing away code.

• Experience working in a fast paced environment, working at lightning speed to ship fast.

• Self starter and a keen learner with an ability pick up new tools, languages, and concepts on the job. We don’t need you to be an Machine Learning Engineer, but having an interest in AI helps!

Key responsibilities

• Collaborate within our core Engineering team, Product Manager and Designer to quickly design, build, and launch new features in our app, taking ownership of the whole stack.

• We encourage everyone to be comfortable working in all parts of our stack, which includes the app (Dart/Flutter), internal tooling (Next.js/TypeScript), and ML scripts for evaluation, data processing, and model training (Python).

• Elevate user experience by continually refining app reliability, performance, and polish.

• Rapidly investigate, diagnose, and resolve bugs to ensure product stability.

• Taking initiative to independently prototype new features based on customer feedback and your own product intuitions.

What we offer

• A chance to join a passionate tight-knit team working on something to change the world

• Competitive compensation (we target 90th percentile)

• Travel between our NYC / London offices

• Usual startup perks like free lunch in our offices + generous learning budget

• Generous budget to cover your personal therapy