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Full-stack software engineer for discovery-AI start-up (first-employee status + equity + leadership)

Moonsift

Moonsift

Software Engineering, Data Science
United States · Canada · Mexico · Europe · North America · United Kingdom
GBP 45k-45k / year + Equity
Posted on Dec 26, 2025
Moonsift is building your “digital twin” for product discovery. Our mission is to help people discover products online by leveraging the power of their own data, our growing community and cutting-edge data science. We’re flipping the Internet on its head; instead of advertisers and biased platforms controlling what you see, you’ll be able to tune your own recommendation engine to bring to you the items that interest you. In more practical terms, think of something like Pinterest for shopping with a much better-than-Spotify recommendation AI.Who are we looking for? Just two things really: competence and ambition. A few things we are specifically paying attention to are: The importance of writing good, clean code and understanding software engineering principles. Knowledge of algorithmic performance, security and NoSQL databases. Ambition to lead and manage. We’re also keen on building an inclusive and diverse team in terms of gender, race, sexual orientation and interests.What will you be working on? Building new features for our web-app that is currently predominantly used by personal stylists to curate collections for their clients. Becoming lead developer of the web-app as well as our browser-extensions and our forthcoming mobile app. Being actively involved in product design decisions and researching and choosing elements of our tech-stack. The role will be flexible and tailored to both your goals and the company. Early worksets you could own include: Owning the build of our mobile-app; Adding a collection-search functionality; Building our paid-membership programme.Our current tech stack: Lots of Node, some Python, React+Redux, Firebase, Javascript Chrome browser extension, Google Cloud Platform (GCP). Full time, hours negotiable. We’re not expecting you to work more than 40 hours per week.What do we think is a good working environment? We’ve been working remotely for almost two years, but keen to have an office base one day. Flexible working times with agreed core hours. We’ve invested in a high-quality, scalable and low-maintenance tech stack where errors get fixed and not ignored. We have regular product design meetings and code reviews with both founders and our junior front-end developer. Some pair programming, but mostly you’ll be expected to work well independently. We want to continue to be a small team of highly capable individuals. We’re really excited to have a team study plan in place; if you aren’t learning things from us, you’ll be expected to spend some working hours studying new methods we can apply.Benefits: If things go well, you’ll get official first-employee status and equity. Salary in British pounds (something upwards of 45k). A free personal stylist session on request. We’ve recently raised funds from investors that include Entrepreneur First (London) and Boost VC (Silicon Valley). We’re building something totally new — an experiment based on a “contrarian” approach following the “zero-to-one” method.How to apply: No application forms, just send a short email to davidw@moonsift.com and your LinkedIn profile and we’ll take it from there.