Product Engineer

Zero Gravity; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Monthly Socials

Company MacBook

Central London Office

Share options

Christmas Shutdown

Zero Gravity Card

Private Healthcare

Job summary

Zero Gravity is seeking an impactful Product Leader to own the AI layer of Zero Gravity Tutor. You will shape prompting strategy, model selection, and retrieval design to deliver adaptive coaching across subjects.

You will work hands-on to prototype features, run evals, and ensure output quality that genuinely supports student learning. You will guide the product lifecycle from discovery to delivery in both B2C and B2B contexts, collaborating with Growth and Commercial to scale the business.

Qualifications

• Proven track record of AI-powered product building.
• Hands-on coding ability to prototype ideas, run evals and debug model outputs.
• Deep understanding of LLM fundamentals: context windows, RAG, prompt engineering.
• Strong product lifecycle ownership: discovery to delivery across B2C/B2B.
• Data-driven decision making using analytics tools, defining success.
• Excellent communication and stakeholder management to align teams.

Responsibilities

• Own the AI layer of Zero Gravity Tutor: prompting strategy, model selection, context architecture, retrieval design and output quality.
• Build and iterate adaptive tutor systems responding to how students think and learn.
• Tackle AI problems: move from objective to subjective, ensure quality as product scales.
• Design and run evals measuring output quality and learning impact.
• Prototype features with hands-on coding and POCs before engineering investment.
• Own the product roadmap: prioritise bets and guide team focus.

Skills

AI product management

Prompting architecture

LLM fundamentals

End-to-end lifecycle

Data-driven decisions

Stakeholder mgmt

Communication

Tools

Ruby

Rails

JavaScript

Postgres

AWS

Job description

Responsibilities

• Own the AI layer of Zero Gravity Tutor - prompting strategy, model selection, context architecture, retrieval design, and output quality across every subject and mode
• Build and iterate on the systems that make Zero Gravity Tutor genuinely adaptive - coaching that responds to how each student thinks, learns, and prepares
• Tackle the hard AI problems: moving from objective subjects into the subjective, solving for evaluation at scale, and maintaining quality as the product expands
• Design and run rigorous evals to measure output quality, hallucination rates, and whether the product is actually helping students learn
• Prototype new features hands-on - you'll write code, build POCs, and stress-test ideas before committing engineering resource
• Own the product roadmap - sequencing bets, setting priorities, and keeping the team focused on what moves the needle for students
• Define what success looks like and hold the team to it: clear metrics on every release, honest post-mortems when things don't land, and a bias toward learning fast
• Act as the voice of the student and the teacher - run user research, synthesise feedback, and translate real-world insight into product decisions
• Work closely with Growth and Commercial to design the loops that turn engaged users into a sustainable, scaling business
• Shape the product experience for schools and the educators inside them - a largely unsolved problem, and one Zero Gravity is well-placed to own
• Work directly with partner schools and teachers to validate what we're building, gather the insight that shapes the roadmap, and earn the trust that unlocks growth
• Help define how Zero Gravity Tutor is packaged and positioned for institutional buyers - working with the commercial team to turn product value into revenue
• Champion a culture of curiosity, testing, and learning - challenge assumptions, seek new ideas, and help raise the bar for product excellence
• Collaborate closely with the engineering squad - set clear priorities, unblock decisions, and keep pace high
• Contribute to Zero Gravity's wider AI strategy, sharing what works in Zero Gravity Tutor across the organisation

Benefits

• Monthly Socials: Join us for fun team socials, completely on-the-house. Quarterly, we go big with sports days, BBQs, and more
• Company MacBook: Get the latest Apple gear to stay ahead of the game
• Central London Office: Work from our beautiful Zero Gravity HQ in Barbican/Old Street, while enjoying flexible WFH options
• Share options: Own a piece of Zero Gravity with our 'Zero Gravity For All' options scheme
• Christmas Shutdown: Enjoy 3 extra festive days off, plus 25 days of annual leave and 8 bank holidays
• Zero Gravity Card: £500 annually to spend on your personal development with your very own Zero Gravity Card
• Private Healthcare: Extensive private health insurance, including dental, mental health support, and gym discounts

Requirements

Proven track record of building AI-powered products - not just bolting a chatbot on, but thinking hard about prompting architecture, model behaviour, and what genuinely good AI UX looks like.

Technically hands-on: comfortable enough with code to prototype ideas, run evals, and debug model outputs using AI coding tools. You don't need to be a software engineer, but you should be able to move fast without waiting for one and move towards contributing to the codebase (Ruby, Rails, Javascript, Postgres, and AWS).

Deep understanding of LLM fundamentals - context windows, RAG, prompt engineering, fine-tuning trade-offs, and how to measure model quality rigorously.

Strong product instinct with experience owning end-to-end product lifecycles - from discovery and definition through to delivery and iteration - across B2C and/or B2B contexts.

Data-driven decision-maker: comfortable with analytics tools (e.g. Metabase, Mixpanel, Google Analytics) and able to define what success looks like before a single line of code is written.

Excellent communication and stakeholder management skills - able to align engineers, commercial teams, and a founder-CEO behind a clear product direction without a lot of process.

Passionate about impact: you care about outcomes, not outputs, and you want the product you build to genuinely change life chances.

Nice to have:

• Experience in EdTech, consumer subscription apps, or B2B SaaS with an end-user product component
• Familiarity with UK education - exam boards, curriculum structure, how schools buy and adopt software
• Experience taking a product from early traction to scale - you've navigated the messy middle and know what it takes
• Have worked alongside a Growth team and understand how product and growth interlock
• Have worked in a company at the 20-50 person stage, where everyone does more than their job title suggests