Staff Decision Scientist, Marketplace

Relay is fundamentally reshaping how goods move in an online era. Backed by Europe’s largest-ever logistics Series A ($35M) led by deep-tech investors Plural, and a recently closed Series B ($95M), Relay is scaling faster than 99% of venture-backed startups.

As a Staff Decision Scientist, Marketplace at Relay, you'll decide which Marketplace problems are real and which only look real, before anyone builds a fix. You'll design how Marketplace decides: which signals count, and what good looks like for booking, matching, and pay. You'll tell the squad lead what to change and what to stop, and get a decision. You'll build the thing that decides: data applications, monitors, and alerts, not decks, using Claude and agents to ship your own tools.

The team consists of around 160 people, with 45+ advanced degrees across computer science, mathematics, and operations research. Thousands of data points are captured, calculated, analysed, and predicted for every single parcel handled.

Responsibilities:

• Decide which Marketplace problems are real and which only look real
• Design how Marketplace decides: which signals count, and what good looks like for booking, matching, and pay
• Tell the squad lead what to change and what to stop, and get a decision
• Build the thing that decides: data applications, monitors, and alerts
• Go and look when the data and the street disagree
• Get the missing data built, and prove whether each change worked

Requirements:

• Have owned the decisions a matching, pricing, or incentive model fed, in a two-sided marketplace or gig platform
• Have seen their work acted on: a leader changed a plan, a team adopted your method, or engineers built what you asked for
• Can trace why drivers or couriers stop booking or cancel, and can read the experiments behind a pricing or incentive change
• Have been through real change, such as a pivot, fast growth, or a new market, and rebuilt something because of it
• Are hands-on and fluent in SQL, with or without AI, and happy to build their own analysis apps, monitors, and alerts
• Would rather ship a working answer this week than a perfect one next quarter

Benefits: No specific benefits mentioned.

Who Thrives at Relay?

• Aim with Precision: You define problems clearly and measure your impact meticulously
• Play to Win: You chase bold bets, tackle the hard stuff, and view constraints as fuel, not friction
• 1% Better Every Day: You believe that small, consistent improvements lead to exponential growth
• All In, All the Time: You show up and step up, taking ownership from start to finish
• People-Powered Greatness: You invest in your teammates, giving and receiving feedback with care and candour
• Grow the Whole Pie: You seek out win-win solutions for merchants, couriers, and customers