Sofia Castillo

Co-founder @ Simera 🌎 | Forbes 30 under 30 | 2x Tech Founder 1x Exit | Building the better way to do global hiring | Led by Love | Guatemalan | Wife & Mother

San Francisco, California, United States

About

We are responsible for what the world becomes, and for the speed at which it becomes 🌈 I’ve been leading development initiatives in Latam since I was 16. At 20 (thanks to a poetry session) I got into tech, data, and AI for systems innovation. I decided to focus on transforming 3 systems through tech: education, employment, and wellness. At 21, I founded Core Code, an edtech company that trained thousands of software developers across Central America and became one of the region’s fastest-growing startups. Two years later, I sold the company to Simera, to hop into the mission of reshaping learning, remote work, and employment globally. IG: @honestbubble Background in co-creation facilitation, learning experience design and iteration, innovation practice, agile program, product and project management, technology team management, systems mapping and practice, event coordination, branding & marketing, experience with start-ups, non-profits, profitable and multinational companies, meditation and mental health research.

Experience

  • Co-Founder & Chief Innovation Officer at Simera
    Aug 2023 - Present · 2 yrs 11 mos

    The inefficient hiring system is a data problem that impacts billions. We are solving this by closing information gaps between candidates and companies, starting with Latam and Middle Eastern talent.

  • Resident Builder & Friend at The Residency
    Jan 2025 - Present · 1 yr 6 mos

    Incubator backed by Sam Altman. Building my company and community next to tech founders in Silicon Valley.

  • Fellow at Sigma Squared Society
    Jan 2024 - Present · 2 yrs 6 mos

  • Entrepreneurship Advisory Board at MuniGuate
    Mar 2025 - Present · 1 yr 4 mos

    Boosting the ecosystem for Guatemalan entrepreneurs to excel beyond borders.

  • Technology Advisory Board at ITO de AGEXPORT
    Mar 2024 - Feb 2025 · 1 yr

    Boosting the ecosystem for Guatemalan technological talent and services to excel beyond borders.