Product Engineer

THE OPPORTUNITY We’re building the future of learning: a world where every student on the planet can access, enjoy, and benefit from world-class education. And we’re on a mission to create the first AI learning unicorn to make it happen. Millions of students already use our personalised AI learning companion daily & we just raised €27m to capture the AI learning market at an inflection point, finally enabling true personalisation at scale for 1bn students. YOUR MISSION You have the opportunity to shape how students learn in the future Engineering is at the core of the company, it really drives knowunity, main character, you can end to end own this revolution yourself across parts such as: - Videos - First ones that build video on large scale truly personalised - Topic prediction, real guidance / personalisation as biggest opportunity in AI - Holy grail is personalisation and guidance, we have a lot of data, you can crack that - Future of practice, quizlet is outdated, practice in future needs to be more guided and diverse - Multi-Modality of outputs - We do not believe in wall of text, we are building cards, graphs, interactive practice elements in the chat - no one has solved this yet - New ways of learning of Gen Alpha - Figure out how this generation learns - In a world of personal AI companions, there will still be in person learning and interaction, how can an AI companion include social use cases and still bring students together - Ability to ship A/B tests to millions of users quickly Why this matters: Knowunity is on a mission to become the #1 AI learning companion for 1 billion students. As a Product Engineer, the features you build will shape how students study, stay motivated, and succeed - while helping us grow DAU, retention, and long-term impact. What success looks like: You’ll ship fast, learn quickly, and see your work used by millions of students around the world. You’ll contribute to both product direction and engineering quality - bringing clarity to trade-offs, opinions to discussions, and impact to metrics. Over time, you’ll become a key voice in the product-engineering loop, known for turning ideas into shipped, loved, and measurable outcomes for millions of students. WHO YOU ARE Your mindset You’re the type of person who: - Builds with urgency and care - you love moving fast without cutting corners, and you take pride in getting things shipped - Thinks product-first - you see code as a means to serve the user, not as an end in itself - Owns outcomes, not just tasks - you don’t wait for perfect specs or process; you figure out what’s needed and make it happen - Loves simplicity - whether it's UX or code, you cut complexity and focus on what delivers value - Leverages AI - as a force multiplier in everything you do - Values excellence over comfort - mediocrity isn’t in your vocabulary Must-haves - Experience with software engineering in a startup or fast-paced environment - Proficiency with Flutter or Experience with building a B2C app for a large userbase - Strong interest in consumer products and solving real user problems - Fluent English; German is a plus - Ready to work from our Berlin office Our Tech Stack Our app is written in Flutter with Riverpod. Our Golang backend is powered by PostgreSQL and hosted on AWS with Kubernetes. Our AI stack consists of several LLM providers (OpenAI, Gemini, Anthropic, and Mistral), custom routing engines, and fine-tuned models. Our data stack consists of BigQuery and dbt. WHAT WE OFFER Not for everyone, everything for the right ones. - Competitive compensation and equity: We’re building Knowunity to dominate the global AI learning market. Your compensation package includes a competitive salary paired with meaningful equity in a company with genuine unicorn potential. Team members who help us reach that goal will be rewarded accordingly. - Elite team and true ownership: You’ll work alongside 60 exceptional people who match your ambition within a flat hierarchy - direc