You will get Full-Stack Developer for a Fitness App with booking, analytics & payments
Rising Talent
Project details
I will build a production-ready full stack fitness platform that helps you attract users, automate bookings, and grow your business fast. With over 10 years of experience in SaaS, HealthTech, and sports platforms, I deliver products that look great, scale easily, and perform flawlessly.
You will get a clean and secure app built with React, Node.js, Firebase, Stripe, and AWS. Every part is designed for high performance, analytics, and smooth user experience.
I led development of large fitness solutions like Sportclubby with more than 1M users and 17M bookings, and I bring the same level of quality and precision to your project.
Whether you need a powerful MVP or a full SaaS platform, I will guide you from idea to launch with transparent communication, weekly updates, and measurable results at every stage.
You will get a clean and secure app built with React, Node.js, Firebase, Stripe, and AWS. Every part is designed for high performance, analytics, and smooth user experience.
I led development of large fitness solutions like Sportclubby with more than 1M users and 17M bookings, and I bring the same level of quality and precision to your project.
Whether you need a powerful MVP or a full SaaS platform, I will guide you from idea to launch with transparent communication, weekly updates, and measurable results at every stage.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$3,500
|
Standard
$4,200
|
Advanced
$8,500
|
|---|---|---|---|
| Delivery Time | 21 days | 42 days | 63 days |
Number of Revisions | 2 | 3 | 4 |
Number of Pages | 4 | 7 | 9 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Additional Revision
+$300
Additional Page
(+ 2 Days)
+$500Frequently asked questions
3 reviews
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CH
Charlie H.
Feb 19, 2026
Senior Full-Stack Developer for Healthcare SaaS
JP
Julia P.
Oct 27, 2025
React Native Developer for Healthcare App
Alina and her team did an excellent job. They worked fast, kept a high professional level and delivered everything with great quality. Communication was easy, clear and always on time. Highly recommend.
AK
Alex K.
Jun 20, 2025
Full Stack Developer (Node.js and React) for Wellness/Healthcare Web Development
Alina delivered everything quickly and with great quality. The code is clean, stable, and exactly what I needed. She’s easy to work with, communicates clearly, and notices things others might miss. Really happy with the experience, I’ll definitely reach out to her again for future projects.
About Alina
Full Stack Developer | Web Developer | Mobile app developer | HIPAA
100%
Job Success
Kharkiv, Ukraine - 3:19 am local time
Exceptional 5.0⭐ feedback
100+ happy clients
100% Job Success Score
10+ years of certified experience (Node.js, React, Next.js, NestJS)
150+ projects successfully delivered as a Full Stack Developer
I’m a Full Stack Developer and CEO, focused on HealthTech, IoT, and AI-driven platforms. With over 10+ years of experience in the full stack developer field, I’ve personally helped healthcare startups, clinics, and wellness providers bring their platforms to life. I’m not just a CEO - I stay involved in every full stack project, from discovery to deployment. I regularly use Laravel , React , Python , React Native , Expo , Shopify , as well as AI integrations (OpenAI, LangChain) for analytics and personalization.
Whether it’s building a patient-facing mobile app, integrating wearables, or connecting with EHR systems, as a Full Stack Developer ai I care about getting the details right. As a Full Stack Developer I value long-term collaboration and take pride in building real 5⭐️ partnerships here on Upwork. I have solid experience as a Full Stack Developer working with Python and AI models, as well as developing user interfaces in React and integrating Shopify for e-commerce solutions.
What I bring like a Full Stack Developer & Web Developer:
🟢 11+ years of hands-on development experience as a Full Stack Developer - 30+ HealthTech products launched
🟢 Full Stack dev expertise – from scalable backends to intuitive frontends across web & mobile
🟢 My core stack: React, Node.js, React Native, Next.js
🟢 I use Python and AI to power features like wellness insights, sleep analytics, and behavior tracking
🟢 I’ve built Shopify stores for medical brands with custom flows and real-time data sync
🟢 I use HTML5, Tailwind CSS, Bootstrap, and JavaScript to create responsive, accessible interfaces
🟢 I know BLE inside and out
🟢 I’ve connected apps to EHR systems using HL7 and FHIR
🟢 Backend experience: Firebase, MongoDB, MySQL
Projects with real impact:
✔️ 57% faster response time for anxiety events (IoT mobile app)
✔️ 19% earlier detection of health risks in elderly care
✔️ 11% better sleep quality, 8% fewer apnea events using AI
✔️ 45% increase in engagement with BLE-based wellness trackers
✔️ 14% productivity boost, 17% fewer resource losses in IoT-enabled workflows
✔️ MVP launch time reduced by 40% using Expo + React Native + Firebase
✔️ SaaS product adoption grew by 23% after full-stack redesign with subscription logic and real-time updates
✔️Up to 57% faster care & 23% higher SaaS adoption
I can help you as a Full Stack Developer:
🟢 Custom web platforms using React + Node.js , like Full Stack Developer
🟢 Mobile apps in React Native - BLE-connected, native-feeling, cross-platform
🟢 Backend logic with Python - AI scoring, health tracking
🟢 Shopify storefronts for medical or wellness brands
🟢 EHR/EMR integration (HL7, FHIR, real-time data exchange)
🟢 BLE device integration with Firebase or custom backends
🟢 Web design that meets HIPAA, GDPR, and WCAG standards
🟢 Clean, maintainable APIs - or rescuing legacy codebases
I work as a Full Stack Developer confidently with HTML, HTML5, CSS, CSS3, Tailwind CSS, and Bootstrap to build responsive, modern interfaces. I use JavaScript, TypeScript, jQuery, React, React Native, and Redux for developing web and mobile apps. I also have basic experience with Angular and Vue.js and can pick them up quickly when needed.
On the backend, I use Node.js and Python, and work with SQL, MySQL, MongoDB, and Firebase to build secure, stable systems. I worked with Laravel and CodeIgniter, and PHP about 7 years ago and can refresh those skills if required. I handle REST and GraphQL APIs and have solid API integration experience.
I build cross-platform mobile apps for iOS & Android using React Native - including BLE, push notifications, and smartphone integrations. I'm familiar with Android App Development and iOS Development, and have real-world experience in Mobile App Development. I am mobile developer.
I use Git daily for version control and CI/CD. I develop Web Applications and handle Web Development and Full-Stack Development , from frontend to backend. I create accessible, UX-friendly Web Design. I have basic experience with WordPress and can edit or adapt existing themes.
I design scalable systems with a focus on clean architecture and maintainability (Software WEB Design). I also use Adobe Photoshop as a Full Stack Developer for basic graphic edits, design adjustments, and preparing mockups for development.
Send me a message, I'm a Full Stack Developer with HIPAA compliance
Steps for completing your project
After purchasing the project, send requirements so Alina can start the project.
Delivery time starts when Alina receives requirements from you.
Alina works on your project following the steps below.
Revisions may occur after the delivery date.
Kickoff and requirements
We start with your brief and goals. Together we define your core features like booking, payments, analytics, and admin dashboard.
Architecture and setup
I build a full stack structure, connect databases, and prepare a secure environment in AWS or Firebase.