Jasper
de Winter.
Senior product manager building data products, API ecosystems, and AI/GenAI at commercial scale.
// ABOUT ME
Senior product manager with 15+ years building commercial digital products, data platforms, and API-first ecosystems — across Booking.com, TUI, and KPN, and more recently as founder of Langbly (B2B translation API) alongside freelance AI work in the public sector.
That work gave me direct exposure to AI governance, compliance, and adoption at organizational scale, which is increasingly where commercial product decisions are made too.
I'm technical enough to build the PoC myself, commercial enough to own the business case, and entrepreneurial enough to care about what actually ships.
Years building products
Users served (Police RAG)
Languages via Langbly API
Markets managed (TUI)
// EXPERIENCE
Founder
- Built and launched a B2B translation API covering 140+ languages as a strict drop-in replacement for Google Translate v2.
- Published official SDKs in Python, JS/TS, and PHP with full documentation and migration guides.
- Defined tiered pricing model and monetization strategy, positioning against Google Translate at 81–90% lower cost.
GenAI Strategy Consultancy (Freelance)
- Developed comprehensive GenAI strategy in one of the Netherlands' most highly regulated environments.
- Led stakeholder engagement across technical, legal, ethics, and operational units to align AI strategy.
- Created actionable technical roadmap balancing innovation velocity with compliance.
Founder
- Built and launched two-sided marketplace for interim recruitment, matching clients with freelance professionals.
- Developed end-to-end product: intake workflows, requirement-based matching, and broker handoff automation.
- Achieved product-market fit and strategic exit within 8 months.
Data Product Consultant (Freelance)
- Owned end-to-end product development of multi-source RAG application serving 60,000+ police employees.
- Used scalable architecture with semantic search, vector databases, and custom retrieval mechanisms.
- Defined data contracts and interface specifications governing data access and retrieval standards.
Senior Product Owner - AI/ML Pricing
- Initiated and delivered ML-based dynamic pricing product serving TUI's entire flight inventory across multiple markets.
- Established KPIs and testing framework to measure ML vs rules-based performance, demonstrating significant margin improvement.
- Navigated pricing compliance and internal financial controls across 8+ source markets.
Manager E-commerce
- Owned commercial product strategy for KPN mobile app, managing P&L and driving feature prioritization.
- Led multidisciplinary team of 8 FTEs managing digital commerce across web and mobile app.
- Implemented real-time targeting using machine learning models to predict customer intent and optimize conversion.
Product Manager
- Conceptualized and launched white-label solution enabling event venues to sell hotel inventory (0-to-1).
- Achieved 50% decreased bounce rate, 100% increased bookings, 200% higher upsell.
- Reduced single-channel dependency from 90% to 55%, significantly lowering business risk.
Store Interface Manager BE-NL
- Led cookie consent implementation for Dutch website, addressing first-in-Europe regulatory mandate.
- Coordinated cross-functional team (legal, product, UX, analytics) to deliver compliant solution.
Junior Product Owner
- Increased conversion rate on Desktop Hotel Page through experimentation and data-driven UX improvements.
- Developed methods to scale customer support without expanding CS team.
Search Specialist
- Led SEO/SEM strategies for major brands including Lexus, Volkswagen and KPN, managing > €1MM digital spend.
// CAPABILITIES & EXPERTISE
AI & GenAI
Product Leadership
Data & APIs
Tech Stack
// SIDE PROJECTS & VENTURES
SnapTale
2023AI-generated book summary app and YouTube channel (>25K followers). Overcame early LLM context window limitations through innovative chunking, summarization chains, and retrieval mechanisms.
Taxatio
2021ML-driven real estate pricing app that reached #7 in NL amusement app rankings. Built end-to-end data pipeline and prediction models.
Langbly
2025B2B translation API covering 140+ languages. Strict drop-in replacement for Google Translate v2 with official SDKs and developer ecosystem tooling.
EDUCATION
HEC Paris Grande École
Executive Master (MSc), Innovation & Entrepreneurship
GPA: 3.7/4.0
Amsterdam University of Applied Sciences
Bachelor of Business Administration (BBA), Marketing
GPA: 8/10.0
LEARNING & CERTIFICATION
Amazon Web Services (AWS)
Generative AI with Large Language Models
DeepLearning.ai & OpenAI
- • LLM Application Development (Embeddings, LangChain, RAG)
- • Serverless Agentic Workflows with Amazon Bedrock
- • OpenAI: Reasoning with o1
- • ChatGPT Prompt Engineering for Developers