Johann Rymill

About Johann Rymill

Growth engineer and marketplace scaler taking tier-1 VC-backed startups from zero to Series A and beyond.Current:Building the first battle-tested and fully-managed outbound platform designed specifically for Creator and Influencer acquisition at scale. Hyper targeted segmentation (persona, city, language). We manage end-to-end execution.Prev:• Built TourHero’s (Sequoia + Lightspeed) entire acquisition engine - driving 93.7% of new customers and 40% MoM growth for 7 consecutive months.• Co-founded & CSO of Prestanza - LatAm’s first asset-backed liquidity fintech using crypto hedging to convert property/vehicle titles into cash in 48 hours.• Founding team at Zapp (raised $300M Series A+B from Lightspeed, Atomico, Rocket Internet)- grew headcount 1003% in year one, Europe’s second-fastest-growing company of 2021.• Led Rappi’s (Sequoia, Andreessen Horowitz) secretive special projects team expanding Big Dark Stores across LatAm.Tech:• Python, BigQuery, web scraping, dbt, applied machine learning classifiers, large language model systems, marketing automation.What i do:• Design the GTM, write the code, run the numbers, scale the ops.Leadership style:• High-energy builder who thrives on ambiguity and ships fast.• Experience across UK, US and LatAm tech ecosystems.Education:• University of Bath alumnus.• London School of Economics (LSE) startup accelerator mentor. TEDx speaker on entrepreneurship.Always open to advising or investing in mission-driven startups where AI and automation unlock unfair advantages - with the objective of accelerating the path to exit or IPO.

Experience

1. Founder

   Stealth Startup

   Jul 2025 — Present · NY, US

   Building the first battle-tested, fully-managed outbound platform designed specifically for Creator and Influencer acquisition at scale, leveraging the knowledge gained from the explosive growth it caused at TourHero.No logins, no confusing SaaS subscriptions. We fully manage end-to-end execution from data collection and model training right up until platform sign-ups and booked partnership meetings.The MVP I built at TourHero- Delivered 93.7% of all leads and completely replaced paid media by month 2- Increased weekly sales calls from 70 to 1,229- 9% reply rate over 1 million outbound emails (unheard of)-$9M+ in revenue generated- 40% MoM company growth for seven consecutive months,$100M+ in GMVWe have taken the learnings from building a powerful internal tool to create a purpose-built system to work for 100’s of other companies struggling to acquire Influencers and Content Creators at scale in specific cities, languages or niches.If you\'re a brand, platform, or agency struggling to scale quality partnerships and don’t want another spam-cannon SaaS tool that everyone else is using, let’s connect.

Education

• Colegio San Carlos

  High School

• University of Bath

  Bachelor of Science - BSc (Hons), Politics & International Relations (with placement)

  2015 — 2019

• Massachusetts Institute of Technology

  Computational Thinking using Python, Computer Science

  2020 — 2021

Skills

• Spanish
• Negotiation
• Sales
• Debating
• Politics
• Teamwork
• Time Management
• Emotional Intelligence
• Portuguese
• Social Networking
• Independent Thinking
• Self-Confidence
• Sports