Contact person: Business Client

Phone:Show

Email:Show

Location: Alcantarilla, Spain

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Description

We are looking for an experienced full-stack developer to build the MVP of Chromic, a medical SaaS product for dentistry, with:

Web application

Android app

iOS app

Chromic is a clinical tool, not a consumer app.
Architecture, role integrity, and data reliability are far more important than flashy UI.

Project overview

Chromic allows dental clinics and patients to track tooth-whitening treatments over time using images and AI analysis.

Core idea:

Clinics provide patients with physical cards

Patients register using a valid card (serial or QR)

Clinic and patient are automatically linked

Patients upload images during treatment

Images are processed via an external AI pipeline (already available)

Results are shown through clinical charts and tables

Core requirements (MVP)

1. Authentication & roles (CRITICAL)

Email and/or OAuth login

Two roles only:

Clinic

Patient

Role selection on first login

No default role

Role must be explicit, persisted, and never inferred

Strict role-based routing and permissions

2. Onboarding

Clinic onboarding

Clinic name

Contact email

Country + postal code

Dental notation (FDI / ADA)

Clinic logo (optional)

Patient onboarding

Nickname only (no real names)

Age ranges (not date of birth)

Country + postal code

Habits (brushing, staining drinks, smoking)

All onboarding must be GDPR-compliant.

3. Card-based access model

Clinics create cards with unique serials / QR codes

Patients must enter or scan a valid card to access the app

Card automatically links patient to clinic

No manual patient creation

Card is the gatekeeper of the system

4. Dashboards

Clinic dashboard

Patient list

Treatment progress overview

Per-patient detail view

Messages / basic communication

Patient dashboard

Upload progress images

View whitening score over time

Simple, clear progress visualization

5. Image processing integration

Image upload from web and mobile

Trigger external webhook (Make / API already available)

Receive structured analysis:

Whitening score

Per-tooth color (VITA scale)

Store and visualize results over time

6. Platforms & architecture

We expect:

Web app

Android app

iOS app

Preferred approaches (open to discussion):

Web: React / [login to view URL] or similar

Mobile: React Native / Flutter / similar

Backend: Node / Django / Laravel or similar

Relational database preferred

You may propose a different stack if you justify it clearly.

7. Visual style

Clinical / medical aesthetic

Black, white, greys

Minimal accent colors only where informative

No playful or “colorful SaaS” look

What we value

Clean role-based architecture

Clear separation between auth, business logic, and UI

Ability to think in flows and states, not just screens

Experience with SaaS, health-tech, or regulated products

Honest estimates and clear communication

Deliverables

Web app (production-ready MVP)

Android app

iOS app

Clean, documented code

Basic deployment setup

Ownership of source code

To apply, please include:

Relevant past projects (links if possible)

Proposed tech stack (web + mobile)

Estimated timeline

Fixed-price estimate for the MVP

Any architectural concerns you foresee

Existing MVP (important)

An initial web-based MVP already exists, including:

Core product flows

Screen structure and navigation

Data model and entities

Image processing logic (via external webhook)

This MVP is not required to be reused, but it should be used as:

A functional reference

A validation of product scope and flows

A baseline to accelerate development and avoid rethinking solved problems

The new implementation should improve structure and robustness, not reinvent the product." (client-provided description)