Guillermo López Marín
Product Manager · Founder · Maker
Profile
Product-obsessed and deeply customer-oriented Product Manager, with over 10 years taking hardware-software products from zero to market. I founded a medical device company at age 27 and led it for 10 years with a team of 28 people: distribution deals in 10+ countries, 10,000+ units distributed, and around €1M in revenue for 2 consecutive years. I've launched 10 hardware-software products to the medical and veterinary markets. Currently Product Manager for APIs and B2B connectivity at Avantio (Travel Tech): API-first strategy, API metrics as a product, and the integrations ecosystem.
Experience
- Product Manager for Avantio's public API portfolio (PMS REST & SOAP, Portals, Web and Accounting) and B2B connectivity (Channel Manager and App) in Travel Tech.
- API-first approach: OpenAPI contract before implementation, design conventions (versioning, errors, pagination), public documentation and a deprecation policy with migration guides.
- Led the launch of the Web REST API and the progressive deprecation of the XML API, migrating customers without breaking integrations and reducing onboarding time for new integrations.
- Defined API metrics as a product (adoption per endpoint and consumer, uptime, p95 latency, error rate) with observability dashboards for business and engineering.
- Defined the API alerting and incident-response system to operate against explicit SLOs, coordinating engineering, CX and sales across the full lifecycle.
API-firstOpenAPI / RESTAPI metricsObservabilityTravel TechB2B
Education
Electronics Engineer
Universidad de Málaga · Sep 2009 – Jun 2017
Completed while co-founding and running eKuore.
Technical Electronics Engineer
Universidad de Málaga · Sep 2006 – Jun 2010