Marine Sergent is a Senior Product Designer currently at Meta, designing products used by billions across WhatsApp, Messenger, Instagram, and Facebook — with a focus on bridging technology and people. Before Meta, she ran her own design studio working with startups across AI and cultural tech. She also teaches, mentors, and writes about the intersection of design and technology.

LinkedIn contact@marinesergent.com
Meta AI
2022–2023

Meta AI — Generative AI Product Experiences

In 2022, Meta entered the generative AI space — building on a decade of AI research to create a new category of consumer AI products. Before established design patterns or org structures existed, I helped shape how generative AI would work as a consumer product across Meta's apps.

The work involved design sprints, C-suite reviews, and rapid prototyping — spanning a taxonomy of potential use-cases, a design language for AI conversations, and setting up early cross-team infrastructure. This served as the design foundation for Meta AI, which launched across WhatsApp, Messenger, Instagram, and Facebook in September 2023.

Meta Newsroom ↗
2018

Birds.ai — AI-Powered Asset Inspection

Birds.ai uses drones and AI to inspect wind turbines and solar panels, replacing manual climbs at 130+ metres. I designed their inspection platform, helping asset managers navigate from a spatial view of the asset to individual findings and their photos, which turned what used to be 600-photo paper reports into a dozen pages.

I designed the full product end-to-end — from wind turbines to solar panels — including a design system built for a single front-end developer but structured to scale to new asset types like crop fields and protected natural areas.

The startup raised €1M after the first version launched, using the prototype to present the solution to investors.

Facebook Shops — WhatsApp Facebook Shops — IG Direct Facebook Shops — Messenger
2020–2022

Facebook Shops — Designing Across Meta's Apps

Facebook Shops launched in 2020 as the first commerce product designed to work natively across both Facebook and Instagram.

I led the design of the core product page and, over two years, expanded into leading the cross-app unification effort. Each app had been built independently — its own design system, codebase, and team processes — so I defined a shared information architecture and initiated the commerce product system, a unified set of building blocks that enabled teams to ship once across multiple apps.

The product system was adopted by 40+ teams, extended to WhatsApp and Messenger, and became a model for cross-app product development at Meta.

Meta Newsroom ↗
2017–2019

Cultcheers — A Platform for Cultural Exchange

Cultcheers connects local cultural talents — historians, artists, scientists, philosophers — with curious people for 60-minute experiences hosted in someone's home. I designed the full digital platform, working within startup constraints of time and budget.

Most platforms like this organise around events. I designed around subjects instead: a talent builds a library of what they know, and adds dates when the moment is right.

As the sole designer, I led the product end-to-end, shaping work across engineering, content, and marketing — shipping a credit-based wallet, a hosting system, a brand identity, and a design system spanning 250+ screens. The startup raised €600K after launch.