System Status: Agentic Workflows Online

The Future of Hospitality is Agentic.

Building intelligent API ecosystems and AI-first product strategies for the next generation of hospitality technology.

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Core Expertise

Bridging Legacy Systems with Agentic Innovation.

AI-First Product Strategy

Moving beyond simple features to autonomous agentic workflows. Integrating LLMs with reliability using frameworks like AWS Bedrock and Deepeval.

API Connectivity Strategy

Navigating the hospitality "spaghetti" of integrations. Designing scalable partner-facing REST APIs for PMS, CRS, and Channel Manager ecosystems.

Product Leadership

Fractional CPO/Product Leader services for B2B SaaS. Managing full product lifecycles from discovery to enterprise-class launch.

Proven Track Record

Experience that Scales.

Product Leadership & Connectivity
Duetto
2023 — Present
Las Vegas, NV

Senior Product Manager, Growth

Leading Duetto’s AI-first innovation for customer insights and market trends. Owning the API ecosystem strategy to optimize connectivity for thousands of hotel partners across global networks.

AI-First Innovation API Sourcing
Groupon
2022 — 2023
Chicago, IL

Senior Product Manager | Scheduling & Reservation APIs

Led a team focused on building Groupon's supplier and distributor API connectivity partnerships, merchant strategy, and product roadmap for global scheduling workflows.

Partner APIs Merchant Strategy B2B SaaS
BnBerry
2020 — 2021
Product Strategy

Product Strategy Consultant

Directed the development of a supplier extranet and distribution roadmap. Successfully delivered critical integrations with TravelClick (Amadeus) and DerbySoft to scale inventory reach.

Extranet Architecture Inventory Mgmt Global Distribution
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MGM Resorts
2019 — 2021
Las Vegas, NV

Director 3rd Party Connectivity

Architected enterprise-class API integrations with premier PMS, channel managers, and Central Reservation Systems (CRS) for MGM's global resort portfolio.

PMS/CRS Ecosystems Enterprise Integration Partner Mgmt
Expedia Group
2014 — 2019
London & Denver

Connectivity Manager | Supplier APIs

Managed global E2E integration projects for connectivity APIs (XML/JSON) across multiple distribution ecosystems and strategic hotel chain accounts.

Connectivity APIs XML/JSON Strategy E2E Integration

Case Study

Scaling Distribution for BnBerry.

1.5 Years
Strategic Advisor Tenure

"A focus on building the infrastructure for scale—connecting niche inventory to global distribution channels through robust product roadmapping."

The Challenge

BnBerry required a centralized ecosystem to manage diverse supplier inventory and expand its global footprint through top-tier hospitality switches and reservation systems.

01 Supplier Extranet

Architected and built a custom supplier extranet from the ground up, featuring advanced reporting dashboards and dynamic inventory management functionalities.

02 Distribution Roadmap

Developed the long-term product vision for key distribution partnerships, identifying high-value integration targets to drive revenue.

Key Deliverables: Tier-1 Integrations

DerbySoft Integration
High-performance connectivity switch management.
TravelClick (Amadeus)
Seamless connectivity with Amadeus global distribution.
Istvan Szelezsan

The Consultant

Istvan Szelezsan

I founded Szeli Consulting to help hospitality tech companies move past the era of static integrations and into the age of intelligence.

My career has been defined by a single question: How can we make these systems talk more effectively? From managing Expedia’s global connectivity to building AI-driven insights at Duetto, I bring a product leader's lens to technical complexity.

✓ AWS Bedrock & LLMs
✓ REST/JSON API Strategy
✓ B2B SaaS Product Mgmt
✓ PMS/CRS Ecosystems

Let's Connect

Ready to Design Your AI Roadmap?

Book a 15-minute introductory call to discuss your API strategy, product vision, or agentic workflow implementation.

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LV | NV | USA
istvan@szeliconsulting.com