Sergio Castillo
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Jalisco, Mexico
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Résumé
Jobs
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Senior Product ManagerApptegyJan 2024 - Current (2 years 9 months)• Lead the Platform team to migrate the authentication service in 3 quarters to support 9M+ registered users and 200k MAU.
• Lead the Rooms team to rebuild and optimize the data ingestion, doubling capacity from 400 to 800 school districts while ensuring scalability and reliability.
• From 0→1, built and launched an internal Retool suite in 1 month, saving 180 engineering support tickets and increasing security among the support team. Implemented a new AI flow using v0.
• As the Product Leader for the Platform team, I maintain direct communication with Marketing, Sales, and Support to define the marketing strategy for any new feature, ensuring that our go-to-market strategy is effectively aligned with product launches.- Product ManagerSalesloftJan 2021 - Jan 2024 (3 years 1 month)• Led the Conversations team to become an enterprise-ready product, achieving a +30% increase in adoption and incorporating AI features such as Summaries and Action Items previews, while successfully reducing the word error rate for transcripts from 24% to 7%.
• Led the Deals team to double adoption and usage by integrating it with the rest of the platform, leveraging my understanding of CRM systems to enhance user experience and data management.
• Co-led with other PMs the development of the first coaching dashboard, achieving an 18% usage rate in the first 3 months, while managing the entire product lifecycle from discovery and ideation to development, validation, launch, and growth, ensuring alignment between user needs, te - Product Lead & Engineer ManagerKueskiJan 2019 - Jan 2021 (2 years 1 month)• As Product Data Lead, built the first data lake & ingestion system in 3 quarters; reduced retraining time from 2 weeks to 2 hours (-99.45%).
• From 0→1, built the first application leveraging the Risk AI model, enabling the Risk team to tune parameters in real time and adjust loan acceptance variables during COVID.
• As Eng Manager, increased loan acquisitions via mobile app from 30% → 60% in 8 weeks, reducing CAC.
• As Eng Manager, launched Kueski Pay, leading BNPL in México with the first vendor VivaAerobus.
• Oversaw the entire data lifecycle as Product Lead for the Data team, collaborating closely with Engineering, Accounting, Finance, and Data Science teams to understand their data needs. This involve - Engineer ManagerTCSJan 2017 - Jan 2018 (1 year 1 month)• Built first nearshore delivery team of 8 members for a major financial institution, enabling consistent release velocity. Build trust to create 4 more after the first year. • Delivered long-delayed releases by aligning execution with quarterly goals using agile best practices; achieved 70% commitments per quarter.
- TFounder Engineer & Engineer ManagerTomatuCarJan 2015 - Jan 2017 (2 years 1 month)• Founding engineer for tomatucar.com.mx, peer-to-peer car rental startup featured in El Universal. The platform hosted up to 2000 cars for rentals across Mexico. • Owned architecture, product strategy, and took the product from ideation to implementation in 3 months, 0 to 1 .
- CSoftware Engineer & IT ManagerConcours Mold, ImpactRx, SofttekJan 2010 - Jan 2015 (5 years 1 month)• Held progressive software engineering roles across Manufacturing, Pharmaceutical, and Banking sectors, delivering robust solutions tailored to industry-specific challenges.
Education
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- AAI Product Management Bootcamp & CertificationAI Product AcademyMay 2025 - Jul 2025 (3 months)
- AI Product Management 101 & Certification - Building AI Products end-to-endMavenJan 2025 - Mar 2025 (3 months)
- Advanced AI Product Leadership CertificationMavenJan 2025 - Mar 2025 (3 months)
- Building Impactful ProductsMavenOct 2022 - Jan 2023 (4 months)
- Machine Learning Nano DegreeUdacityJun 2016 - Jan 2017 (8 months)
- MSc. Advanced Computing Machine LearningUniversity of BristolSep 2015 - Jan 2016 (5 months)
- BSc. Software EngineeringUniversidad MaderoSep 2005 - Jan 2010 (4 years 5 months)