Guillermo López Marín

Profile

Technical Product Manager with 10+ years taking connected hardware-software products (IoT and medical devices) from zero to market. Currently Product Manager for APIs and B2B connectivity at Avantio (Travel Tech): API-first strategy, API metrics as a product and the integrations ecosystem. I founded eKuore, a medical device company, at age 27 and led it for 10 years with a team of 28 people: 10 products launched to the medical and veterinary markets, the medical devices under ISO 13485 and CE marking (MDD/MDR), distribution in 10+ countries, 10,000+ units and around €1M in revenue for 2 consecutive years.

Experience

1. Product Manager — APIs, Channel Manager & App · Avantio

   Mar 2025 – Present · Valencia

   1 yr 8 mos

   • 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-first

   OpenAPI / REST

   API metrics

   Observability

   Travel Tech

   B2B

2. Engineering Manager (Embedded Systems Team Lead) · Littelfuse (Embed UK)

   Jul 2023 – Feb 2025 · Remote

   1 yr 8 mos

   • Led a multicultural 7-person embedded systems team within an automotive environment undergoing constant change.
   • End-to-end people management: hiring, career development, promotions and performance reviews, prioritizing team health and wellbeing.
   • Organized mentoring, knowledge-sharing sessions and technical processes; defined the resources needed to meet project objectives.
   • As Project Manager: assessed requirements, defined plans, managed stakeholders and risks, and adapted the plan to scope changes.

   C++

   Embedded systems

   GitHub

   Automotive

3. Product Manager · eKuore Medical Devices

   Jan 2020 – Jun 2023 · Valencia

   3 yrs 6 mos

   • Led two 5-person squads with Agile/Scrum methodology: user stories, sprint planning, review and backlog grooming.
   • Managed the product roadmap aligned with business strategy and customer needs.
   • Releases that increased sales by 50% (from €800K to €1.2M).
   • Customer satisfaction improved from NPS 6 to NPS 8.
   • Release velocity went from 6 months to 1.5 months (4x faster).
   • Managed the medical device product lifecycle under ISO 13485 and CE marking (MDD/MDR), coordinating requirements and documentation with quality and regulatory.

   Figma

   Jira

   Confluence

   Mixpanel

   Scrum

   Medical devices

   ISO 13485

   CE marking (MDR)

4. Sales Manager & Business Developer · eKuore Medical Devices

   Apr 2013 – Feb 2020 · Valencia

   6 yrs 11 mos

   • Defined the business strategy for the medical market across 5+ countries.
   • Negotiated B2B contracts that doubled revenue in 2019 (from €400K to €800K).
   • Built a 5-person sales team and expanded distribution to 10+ countries.
   • Led the presence at 15+ international trade fairs (Dubai, Florida...).

   B2B Sales

   Business Development

   Zoho

   MailChimp

5. Engineer — Co-founder · eKuore Medical Devices

   Feb 2012 – Apr 2013 · Valencia

   1 yr 3 mos

   • Developed part of the first electronic product and established manufacturing supplier contacts while validating market interest.
   • Launched a hardware-software product for the veterinary market in under a year.

   Hardware

   Prototyping

   Supplier management

6. Postgraduate Fellowship — Electronics Engineer · Endesa

   Feb 2012 – Oct 2012 · Spain

   9 mos

   • R&D in SmartGrid for deployment in a SmartCity project.

   SmartGrid

   R&D

   SmartCity

7. Industrial R&D projects — Electronics Engineer · Albatron srl

   May 2011 – Dec 2011 · Guarene, Italy

   8 mos

   • Electronic prototyping and PCB design for industrial projects.

   PCB

   Prototyping

   Industrial electronics

8. Fellowship — Electronics Engineer · Premo Group

   Apr 2010 – Apr 2011 · Málaga

   1 yr 1 mo

   • R&D in electronic systems using LabVIEW.
   • Developed prototypes to measure component quality.

   LabVIEW

   Prototyping

Education

Languages

Skills