21st sits at the intersection of three networks (students, alumni, industry partners), each with different reasons to engage. Communicating value to a single audience is hard; doing it to three at once, without flattening into a generic "innovation hub" page, is harder.

The brief was clear: a digital presence that speaks credibly to all three, drives event registrations, and earns the brand trust that lets CentraleSupélec compete for visibility with the Station F portfolio.

Two streams of work informed every product decision that followed:

• Competitive teardown of 14 comparable academic–professional programs (HEC Stories, Polytechnique X-UP, MIT Sandbox, Y Combinator, Station F portfolio sites), mapping what worked, what didn't, and where the white space was.
• Persona work with the program leadership and a sample of each audience, surfacing what each group expected from the platform on first visit and what would convert them.

• Current Student. Looking for credible career signals and resources.
• Alumni. Wants to stay connected and discoverable, with low friction.
• Industry Professional. Seeks talent pipeline and partnership clarity.

Three product decisions drove the design:

1. Audience-segmented entry. The homepage routes each persona to its own narrative path within one click. No generic "learn more".
2. Event registration as the primary funnel. Turning passive interest into measurable action, designed as a 3-step flow with no friction.
3. Brand system that signals serious. Neither "startup chic" nor "corporate academia", but a deliberate in-between that earned credibility on both sides.

Tight loop with an Art Director on typography and brand language, plus the program leadership for content validation. My role: own the UX/UI, drive the product decisions, and translate brand direction into measurable interface choices.

• Early user feedback (n=12) emphasised navigation clarity over visual polish, informing multiple iterations on the event-flow and homepage routing.
• Two design reviews with program leadership to align persona priorities against the institutional voice.
• Handover documentation written for a dev team I'd never met, and the site shipped without a revisit.

• Audience-routed homepage with three distinct value-prop paths.
• Streamlined event-registration flow (3 steps, no friction), built to be the primary conversion metric.
• Consistent visual identity across web and social, built to scale across recurring program editions.

Designing for multiple audiences forces a discipline I bring to every brief: stop trying to please everyone in one frame. Segment the entry, then unify the experience. The work was a brand-trust exercise as much as a UX one. The lesson: those two are inseparable when you're building credibility for a new institution.