We create technology to combat sexual assault and harassment.

1-15 employees
  • Non-profit
  • Headquarters address
    San Francisco, CA
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    About Callisto:

    Callisto is a San Francisco-based nonprofit organization that creates technology to combat sexual assault, empower survivors, and advance justice. Specifically, we create websites that detect repeat sexual assailants and make it easier for sexual assault survivors to report. We are funded by earned revenue from partnering institutions and philanthropic supporters, including, Y Combinator, Greylock Partners, and the Skoll Foundation.

    We are a small but powerful team, united in the belief that we can create a more just world. The culture around us is changing rapidly and the demand for Callisto has never been greater. We will soon expand to address sexual assault and professional sexual coercion in multiple industries, connecting victims of the same predator to each other and with legal support.

    Executive Team:

    Jess Ladd, Founder & CEO:

    Jess Ladd is the Founder & CEO of Callisto. Jess has been honored as a TED Fellow, a Fearless Changemaker by the Case Foundation, and an Emerging Innovator by Ashoka and American Express. Before founding Callisto, Jess founded a series of online services for STD prevention and control, and worked in the White House Office of National AIDS Policy as a Public Policy Associate at The AIDS Institute. She holds a Master of Public Health degree from the Johns Hopkins Bloomberg School of Public Health.

    Anjana Rajan, CTO:

    Anjana Rajan is the Chief Technology Officer of Callisto. Previously, Anjana worked at Palantir Technologies in London, leading new product development in the Middle East. Before that, she worked as a technologist at Johnson & Johnson and was a founding employee of Instinctiv, a machine-learning tech startup. Additionally, Anjana was a triathlete on Team USA and earned her status as a professional athlete for USA Triathlon in 2015. Anjana was a Knight Scholar at Cornell University, receiving her Bachelor's and Master's degrees in Operations Research Engineering.

    Our Values:

    As a tech nonprofit working in the social justice space, we focus on three core values to drive our mission:

    1. Survivor Centric: Our mission is to support survivors by making the reporting process a safe, easy, and empowering experience. This means we are highly focused on protecting their data, designing trauma-informed UX, and ensuring high quality control.
    2. Truth Seeking: We’re all about the impact. We make decisions through grounded, logical, data-driven arguments. We value a culture of humility where we can own our mistakes and learn from them.
    3. Systems Focused: We understand that social justice is complex and requires sophisticated solutions. We see the big picture in order to solve audacious and impactful problems.

    Our Interviewing Process:

    Round 1: Portfolio Review (Come prepared to walk your interviewer through your past portfolio of work)
    Round 2: Technical Interview (A chance to chat with our engineers so we can learn about your technical expertise and a small take-home project for you to demonstrate your work and communication style)
    Round 3: In-person Interview (A chance for you to come to our SF office and chat with the Executive Team)
    Final Steps: Reference Checks, Offer Extended, Background check upon offer acceptance.

    Tech stack

    NodeJS, Angular5, TypeScript, Django, Heroku


    Health and wellness

    Health insurance
    Dental insurance
    Vision insurance