AI behavior design developer for SARA3.0 (weight loss companion for whatsapp)

Freelance UX / AI Developer – Behavioral Design (SARA 3.0)

At Elysee Life (Elysee.ai), we are building the next step in medical weight loss: a fully integrated approach where GLP-1 treatments are strengthened by daily, intelligent AI coaching.

SARA is our AI weight loss coach. She supports clients throughout their journey with medications like Ozempic or Mounjaro, while also acting as an extension of our medical and lifestyle team. Not a replacement for humans — but a powerful layer on top. Humans in the loop.

1. The Mission: design behavior, not just interfaces

This is not about building features.
It’s about creating lasting change.

SARA 3.0 is grounded in behavioral science, including the Fogg Behavior Model.

Your role:

• Translate motivation, ability, and triggers into a daily experience that feels natural

• Design an AI coach that intervenes at the exact moments people tend to fall back into old habits

• Make healthy behavior easier than unhealthy behavior

The goal is simple: help people lose weight — and sustain it.

2. Ability: make the right behavior effortless

GLP-1 medication changes biology. You ensure behavior follows.

You design flows that:

• make nutrition, lifestyle, and medication easy to adhere to

• reduce cognitive load to an absolute minimum

• adapt to each phase of the journey (onboarding, progress, plateau, maintenance)

This includes:

• intuitive interactions around food and eating behavior

• seamless integration with medication, prescriptions, and - live - consults with Elysee nurses and dietists.

• connecting AI with Elysee’s back-office and e-commerce systems (appointments, programs, nutrition)

SARA becomes the daily layer that ties the entire treatment together.

3. Prompt: timing drives behavior

Without the right trigger, nothing happens.

You design prompts that matter:

• subtle nudges during moments of “food noise” or cravings

• timely motivation when someone is about to disengage

• notifications that align with real user behavior — not generic schedules

Less food noise. Better timing.

4. What you’ll build

You evolve SARA from a first version into a true behavioral system:

• a conversational AI that feels relevant and personal

• a UX that is lightweight, intuitive, and supportive

• a platform that works seamlessly with doctors, nurses, and lifestyle coaches

Everything focused on one thing: daily support that actually sticks.

5. Who you are

You are a UX-driven developer with a strong interest in behavior and AI.

You:

• think in flows, not screens

• understand that technology only works if behavior changes

• can translate behavioral principles into real product decisions

• take ownership of the full experience

Experience in health, AI, or behavioral design is a strong plus.

6. Why this matters

You’re not building a tool.
You’re building something that helps people regain control.

The combination of GLP-1 treatment and daily AI coaching is still largely unexplored — this is where it comes together.

Apply

Send your application to Albert Akkermans , Managing Director and show how you use technology to drive real behavioral change.