Cloud-native architecture
Context
The situation before the platform
Why a hotel group needed one connected ecosystem instead of a property management system, a key-card desk and a phone line.
| The business |
A hospitality group in Greece running hotels and resorts, serving guests alongside the operators, front-of-house staff and vendors who deliver the stay. |
| The starting point |
Hotels ran on disconnected applications and outdated systems that did not talk to each other. Guest experiences felt inconsistent, and behind the scenes the gaps between systems produced confusion, delays and inefficiency. |
| The trigger |
Daily operations still depended on manual coordination between teams, from bookings to guest requests. Staff workload kept rising while response times and service delivery slowed down. |
| What they wanted |
One centralised Progressive Web App ecosystem covering room access, smart room controls, service requests and hotel communication for guests, with centralised dashboards and integrations for operators. |
| Constraints |
Guest journeys spread across website, mobile, front desk and other touchpoints had to become consistent · the platform had to connect to existing property management systems without disrupting live operations · growing digital interaction meant guest data security and compliance had to hold up as volume increased · performance had to stay reliable through peak demand. |
System
What it runs at today
The platform as delivered, live across guest, operator and vendor portals.
Manual coordination
30%
Reduction in manual coordination between hotel teams after automation and centralised dashboards shipped
Core capabilities
5
Smart room access, unified guest portals, hospitality automation, cloud scalability and the mobile-first PWA
Engagement length
24+
Months, as an enterprise engineering partnership through growth and scaling
Team size
4+
Design, engineering and QA covering the PWA, integrations and cloud infrastructure
The engineering problem
Four gaps that shaped the build from day one
Not vague pain points — the specific tensions in connecting rooms, systems and staff inside one hospitality platform, each paired with what we did about it.
0
1
Multiple disconnected applications, one stay
Hotels relied on several applications and outdated systems that did not communicate well with each other. Keeping a smooth, consistent experience for guests was difficult, and the gaps showed up as confusion, delays and operational inefficiency behind the scenes.
What we did
A centralised digital hospitality platform bringing room access, service requests and communication with staff into a single application, so the guest journey runs as one connected flow rather than several disconnected tools.
0
2
Coordination between teams done by hand
A large part of hotel operations depended on manual coordination between teams. From managing bookings to handling guest requests, staff had to invest significant time and effort, which increased workload and slowed down response times and service delivery.
What we did
Smart automation for room management and guest requests, with centralised dashboards giving operators real-time visibility into room status, guest preferences and open requests so work is routed rather than relayed.
0
3
Website, app and front desk pulling apart
Guests interacted with hotels through websites, mobile apps, the front desk and more, but those experiences were not always aligned. The inconsistency reduced convenience and made a personalised journey across touchpoints much harder to deliver.
What we did
A mobile-first Progressive Web App with simplified interaction flows, delivering the same responsive experience across smartphones, tablets, desktops and hotel devices, backed by dedicated portals for guests, operators and vendors in one system.
0
4
More digital interaction, more exposure
With the rise in digital transactions and online guest interactions, hotels faced growing pressure to ensure data security and meet compliance standards. Handling sensitive guest information securely while keeping up with regulatory requirements was an ongoing challenge.
What we did
Security treated as a design focus alongside simplicity and scalability, with BLE-based smart access, controlled portal roles and testing that validated smart device communication, operational workflows and compliance before release.
Architecture
How it fits together
Simplified — the shape rather than every service.
0
1
Clients
React.js · Tailwind CSS · PWA · Chat assistant widget
One Progressive Web App serves guests, operators and vendors across smartphones, tablets, desktops and hotel devices, so a guest can unlock a room from a phone and staff can work the same system from a desk.
0
2
Gateway
.NET API layer · Standardised PMS APIs · Portal roles
A .NET service layer exposes standardised APIs for property management system connectivity and handles requests from every portal, keeping guest, operator and vendor access on one contract.
0
3
Services
e-Keys smart access · Guest services · Operational dashboards · Messaging & translation · Payments
RabbitMQ carries messages between services, so smart access, service requests, dashboards and payments can be tuned or extended without destabilising the others.
0
4
Data & infra
Azure hosting · Cloud-native deployment · IoT integration
The platform runs cloud-native on Azure, sized to absorb more guests, rooms and services as the group grows and to hold performance through peak operational periods.
The integration framework was planned as its own piece of architecture rather than added per property: a scalable, flexible layer connecting property management systems, BLE smart devices, IoT services and cloud infrastructure so new connections do not mean new plumbing.
Solutions
Six systems doing the actual work
Not a features list — the specific things we built behind every number above.
Smart room access
Guests unlock and access rooms securely with BLE-enabled digital access from their own devices, removing the dependency on physical key cards and the risk of losing them.
Unified guest portals
Dedicated portals for guests, hotel staff and vendors, all connected inside one centralised system so each group reaches the information it needs without chasing another team.
PMS integration framework
Standardised API integrations connect the platform to existing property management systems and third-party services, allowing quick onboarding and smooth data exchange without disrupting operations.
Smart hospitality automation
Room management and guest requests run through automation instead of manual handoffs, improving coordination between teams and making service faster and more accurate.
Real-time operational dashboards
Centralised dashboards give operators live visibility into room status, guest preferences and open requests, with analytics behind them for decisions and performance review.
Cloud-native scalable infrastructure
Built to handle growth and high demand, holding consistent performance and availability through peak operational periods so hotels scale without hitting system limits.
Key features
What the platform does day to day
Five integrated capabilities, each closing one of the gaps identified above.
| Capability | Runs | Refresh | What it does |
|---|---|---|---|
| Smart room access | Guest device | On unlock | Lets guests securely unlock hotel rooms using digital access technology, with no physical key card |
| Unified guest portals | Guest · operator · vendor | Continuous | Provides connected portals for guests, hotel operators and vendors in one centralised hospitality ecosystem |
| Smart hospitality automation | Automated | On request | Automates guest requests, room operations and service workflows to improve efficiency and responsiveness |
| Cloud-based scalability | Azure cloud | On demand | Supports growing hotel operations and rising guest traffic on a scalable cloud-native infrastructure |
| Mobile-first progressive web app | Any device | Live | Delivers the hospitality experience across smartphones, tablets, desktops and hotel devices |
Integrations
How the moving parts plug in
Property management systems, IoT devices, messaging and payments reach the platform through one integration layer rather than sitting beside it as separate tools.
External systems
Avantio & Loggia PMS
Property management connectivity
e-Keys & IoT devices
BLE smart access, room automation
Vonage WhatsApp APIs
Guest messaging channel
Gr4vy payment APIs
Payment gateway processing
↓
through one standardised integration layer ↓
Platform integration layer
.NET API layer
One contract for every portal
RabbitMQ messaging
Events between services
Azure hosting
Cloud-native deployment
↓
into the core services ↓
Core services
Room access
Guest services
Automation
Dashboards
Payments
Google Maps, Google Translation, AADE and Musement APIs plug into the same layer, so local information, language support, statutory reporting and guest activities are additions to an existing contract rather than separate builds.
Security
What protects guest data and room access
Digital transactions and online guest interactions grew together, so security and compliance were designed in alongside simplicity and scalability.
Secure keyless access
BLE-enabled digital access lets guests open their rooms from their own device, improving security compared with physical key cards that can be lost or misplaced.
Guest data protection
Sensitive guest information is handled under the platform's security design, addressing the compliance standards hotels are held to as digital interaction increases.
Controlled portal access
Guests, hotel staff and vendors each work in their own portal within the centralised system, so people reach the information their role requires and no more.
Reliable cloud infrastructure
Cloud-native hosting keeps performance, reliability and availability consistent during peak operational periods, so access and services do not degrade when occupancy is highest.
Process
How we got there
Five stages, starting with how a hotel actually runs day to day rather than a feature list.
0
1
Discovery
A deep dive into the client's hospitality operations — workflows, daily challenges and guest engagement methods — to find the bottlenecks limiting efficiency and to understand long-term growth goals.
0
2
Planning
Platform architecture and the feature roadmap were structured from those insights, then divided into agile iterations for faster development, quick feedback cycles and continuous improvement.
0
3
UI/UX strategy
A mobile-first, minimalistic design approach so both guests and hotel staff could navigate the platform easily, reducing learning time and improving day-to-day efficiency.
0
4
Development
Built as a cloud-native Progressive Web App and integrated with PMS systems, IoT devices, BLE-based smart access and centralised dashboards to form one connected ecosystem.
0
5
Quality assurance
Extensive testing across devices, integrations and real-world scenarios, validating every workflow and feature for performance, security and reliability.
Business impact
What changed for the business
Beyond the headline numbers, three things guests and operators noticed first.
One connected digital ecosystem
Traditional hospitality workflows became a fully connected digital ecosystem built around guest convenience, operational efficiency and smart automation.
Operations run from one view
The centralised PWA architecture simplified guest interactions while unified dashboards, real-time integrations and cloud scalability improved operational visibility for operators.
Positioned as a technology-led brand
Service personalisation improved and the group now presents itself as a technology-driven modern hotel experience provider rather than a traditional operator.
Commercial outcome
What the engineering choices are worth in operating terms
Every headline number traces back to a specific decision, not a vague platform effect.
| Engineering decision | Operating outcome | Measured effect |
|---|---|---|
| IoT room automation & BLE smart access | Guests handle room access and controls themselves instead of calling the front desk | 58% fewer service requests |
| Unified PWA for guests, staff and vendors | More of the stay is transacted digitally through one interface | 42% more digital engagement |
| Real-time dashboards & PMS integration | Requests are routed and acted on with live visibility of room and guest status | 35% faster response time |
| Smart hospitality automation | Team-to-team handoffs for rooms and requests stop being manual | 30% less manual coordination |
Stack
What it's built on
The actual technologies, not feature names with icons attached.
Frontend
- React.js
- Tailwind CSS
- PWA
- Chat assistant widget
Backend
- .NET
- RabbitMQ
Cloud & devices
- Azure hosting
- IoT integration
- e-Keys
Integrations
- Avantio PMS
- Loggia PMS
- AADE APIs
- Musement APIs
- Google Maps
- Google Translation
- Vonage WhatsApp APIs
- Gr4vy payment APIs
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