35FIT

35FIT is a premier, high-tech fitness ecosystem based in Tallinn, Estonia. As the country's first AI-driven smart gym, it utilizes advanced cloud technologies and automated training systems to optimize user progress.

NSWEB stepped in as the core technology partner for 35FIT, taking full ownership of their digital transformation. Over a two-year collaboration, we engineered a unified digital infrastructure consisting of a high-performance reactive website, an internal CRM subsystem, an IoT hardware management layer, and a native mobile application for staff.

1. 35FIT brand ecosystem engineered by NSWEB

The Challenge

When we onboarded, 35FIT’s infrastructure relied on a legacy Ruby on Rails application developed by a third party, which was highly unstable and prone to critical bugs. Furthermore, the gym depended heavily on a rigid, third-party partner CRM. The partner was unable to adapt to 35FIT's custom business workflows, resulting in:

• Extreme Administrative Overhead: The accountant had to manually generate, track, and send invoices based on fragmented membership packages, costing days of manual labor.
• Frictional Customer Onboarding: Off-site registration was impossible. Processes like validating corporate fitness vouchers (Stebby) and processing online payments required staff to manually create contracts and active codes.
• Disconnected Hardware: Smart water/beverage machines operated independently from member contracts, making it impossible to enforce package limits or track consumption automatically.

Our Solutions

Vue.js

CSS

Ruby

Ruby on Rails

Swift

1. High-Performance Web Application (V2.0)

After stabilizing the legacy platform, NSWEB completely rearchitected and rebuilt the web interface from scratch.

• Reactive Frontend: Developed a clean, highly responsive, and interactive frontend using Vue.js, replacing the static legacy views with smooth animations and dynamic states.
• Client Self-Service & Onboarding: Built a fully automated client portal powered by a robust Ruby on Rails REST API. Customers can now sign up, choose membership tiers, generate their own legally-binding contracts, and manage profiles without human intervention.
• Fintech Integrations: Integrated regional payment gateways (Paysera) and corporate wellness systems (Stebby). Contract activation and coupon validation are now completely automated.

2. Custom User Portal Interface

3. Automated multi-step registration and contract generation

2. Custom CRM Subsystem & Financial Automation

To bypass the limitations of the third-party provider, we engineered a custom middleware CRM subsystem that overlays the existing database, taking full control of core business logic.

• Instant Billing Script: Developed an automated invoicing engine. The script processes thousands of member accounts, checks individual package criteria, calculates payment dates, generates compliance-ready invoices, tracks payment statuses, and sends automated reminders.
• Smart Ambiance Automation: Implemented background operational scripts, including a custom integration with the Spotify API that automatically handles gym music scheduling, powering the facility's ambient atmosphere dynamically based on operating hours.

3. IoT Hardware Integration (Smart Vending via UDP)

We bridged the gap between digital contracts and physical gym hardware by establishing real-time communication with the facility's intelligent water machines.

• Socket Communication: Developed a low-latency networking layer using UDP sockets.
• Contract-to-Hardware Validation: When a member requests a beverage, the hardware queries our database in real time. The system validates if the user's current package includes beverage rights, tracks the exact consumption volume, and caps access based on their contractual limits.

4. Native iOS App for Staff (Swift)

To empower the operational team, we designed and deployed a native iOS application built with Swift for coaches and administrators.

• Real-Time Booking & Push Alerts: Whenever a member books a private session, the designated trainer instantly receives a push notification detailing the session time, goals, and the client's preferred language.
• Internal Facility Controls: Granted staff members direct, mobile-controlled access to hardware overrides and unlocked unlimited beverage station privileges.

4. iOS Trainer App interface for real-time schedule management

The Business Outcome

• 99.9% Administrative Time Reduction: The manual billing and invoice generation process, which previously consumed 5 full working days of the accountant's time every month, was replaced by an automated script that completes the entire cycle in a few seconds.
• Zero-Touch Onboarding: Staff members were completely freed from manual contract entries and Stebby code validations. 100% of registrations and payment flows now run autonomously via the website.
• Reduced Revenue Leakage: By connecting smart water machines directly to database contracts via UDP, 35FIT eliminated unauthorized beverage usage and successfully upsold premium membership packages.
• Enhanced Operational Readiness: The native trainer app completely eliminated missed sessions, ensuring staff members are always prepared with client profiles, scheduling, and real-time alerts.