Senior Backend Engineer [.Net] (work until 9 p.m. CET)

Client

Our client operates in the travel and hospitality industry and is building a high-volume distribution and integration platform connecting downstream systems with multiple Hotel Property Management Systems (PMS) and hospitality platforms.
The platform supports mission-critical availability, rate, and inventory flows and is designed for scale, performance, and resiliency.

Project overview

The project focuses on high-throughput, low-latency distribution, handling complex hospitality concepts such as ARI (Availability, Rates, Inventory), restrictions, inventory blocks, and state reconciliation across event-driven and polling-based models.
The platform is built using Microsoft technologies (.NET and Azure), with strong emphasis on Azure infrastructure, DevOps, and relational data consistency.

Position overview

As a Senior Backend Engineer you will design, build, and maintain core backend integrations between the client’s platform and Hotel PMS / CRS / hospitality systems. This role requires hands-on experience integrating with at least one hospitality platform and strong domain knowledge of hotel distribution, combined with solid experience operating backend systems on Azure and SQL-based architectures.

Eastern European candidates are expected to maintain a 4–6 hour working overlap with the US Eastern Time zone.

Technology stack

.NET / C#;
Azure, including: Azure Virtual Machines, Azure App Gateway, Azure App Services / Functions, Azure Service Bus, Azure DevOps (pipelines, CI/CD);
SQL databases (Azure SQL, SQL Server);
REST APIs (JSON);
Event-driven architectures;
OAuth2 authentication;
Docker;
Observability & logging (Azure Monitor, Application Insights or similar).

Responsibilities

• Design, build, and maintain backend integrations with Hotel PMS and hospitality platforms.

• Implement idempotent ARI (Availability, Rates, Inventory) update mechanisms.

• Handle complex hotel distribution concepts (rate plans, restrictions, inventory blocks).

• Build and operate high-volume, low-latency distribution systems.

• Reconcile system state across event-driven and polling models.

• Design resilient integration patterns (idempotency, retries, deduplication).

• Ensure data integrity and performance in SQL databases.

• Contribute to Azure deployments, CI/CD pipelines, and operational readiness.

• Collaborate with product, QA, and partner technical teams on integration contracts.

• Troubleshoot and resolve production issues with external hospitality systems.

Requirements

• Strong experience in the travel industry and with APIs

• Strong understanding of ARI (Availability, Rates, Inventory), rate plans, restrictions, and inventory allocation.

• Experience with hospitality APIs and reconciling state across event-driven and polling systems.

• 5+ years as Backend Engineer with system-to-system integrations.

• Proficient in .NET/C#, Azure (VMs, App Gateway, App Services, Service Bus), and Azure DevOps CI/CD.

• Strong in REST APIs, event-driven architectures, and SQL databases (schema design, performance).

• Knowledge of idempotent API design, concurrency, retries/backoff strategies.

• Experience with high-throughput production systems and good English communication skills.

Nice to have

• Direct experience integrating with one or more of the following platforms:

• Oracle OPERA Cloud / OHIP

• Amadeus Hospitality Suite

• Sabre SynXis

• Cloudbeds

• Mews PMS

• Infor HMS

• Agilysys Stay

• Shiji Daylight PMS

• Experience with distributed tracing and observability

• Familiarity with high-availability, low-latency architectures

• Understanding of Agile / Scrum methodologies

What We Offer:

• Vacation days: Up to 26 business days per year.

• 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types

• Health and life insurance (Luxmed)

• MyBenefit platform with Multisport option

• Internal psychological support service

• English language classes from the first working day

• Access to external learning platforms: O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training

• Flexible workplace: work from the office, from home, or choose a hybrid option

• Tech Skills Mentoring Program

• Opportunities to develop as a public speaker, mentor, or technical interviewer

• Fully paid idle (bench) when not involved in a project

• Certification reimbursement (AWS, GCP, Microsoft, etc.)