Testimonials

Colleagues, clients, and collaborators on working with Samuel Castillo.

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For services, donations, and consultation calls, X Money is the preferred way to pay.

For services, donations, and consultation calls, X Money is the preferred way to pay.

All products

One path is a forecast you can explain. The other is less time in the numbers.

  1. Veteran entrepreneur
  2. Freelance funnel builder, landing pages & AI automation
  3. Video editor, motion graphics & 2D animation
  4. Founder, AI-powered data visualization
  5. Senior software engineer
  6. Senior product manager, healthcare analytics
  7. Technical business strategist, networking, IoT, security & 5G
  8. Mentor, product & education advisor

Client and delivery work

Veteran entrepreneur

I gave Sam very vague requirements about what I was looking for in a data analysis project. He was able to work with me to better define the scope of my project and iterated on my needs to ensure he provided a product that was useful and provided the insights I was looking for. He was able to accomplish this all under the budget I set aside for the project. He discovered patterns in the data that I never expected to see, pairing his expertise with my industry knowledge perfectly. I'd strongly recommend Sam for any data task you may have.

Freelance funnel builder, landing pages and AI automation

Working directly with Sam has been a pleasure, especially on more technical projects. Technical projects can often have many unknowns, but Sam always knew and expressed what the overarching end goal was. By focusing on the end goal, this created flexibility and made it a lot easier (and enjoyable) to achieve wins along the way. The coordination he did between the different members and making sure everyone had the things they needed was the reason everything moved along.

Video editor, motion graphics and 2D animation

Sam and I have worked together for 8 months on a freelance platform. Sam has been running a teaching business for 18 months and teaches data science. Besides being easy to work with, he has been extremely consistent with project management. We have had many tight deadlines and last-minute changes, but he always provided me with clear instructions and asked me what my workload was like before sending project proposals so that I never felt overworked. No need to say more. His talent, demeanor, professionalism, and attitude speak volumes!

Community

Founder, AI-powered data visualization

Had the pleasure of meeting Sam in a local indie-hacker meetup. He immediately stood out as someone who values hands-on experience over theorizing. Whether it was copywriting or engaging an audience on social media, Sam's practical advice raised the bar of our group. His invaluable insights on promoting my own project definitely elevated my thinking. Sam's real-world experience on how to promote a business would make him an asset to any team!

Senior software engineer

I met Sam about three months ago in a local meetup for entrepreneurship and innovation. 1) Sam has been co-hosting virtual meetings ever since the COVID-19 pandemic began and is an integral part of keeping that community going. 2) In these sessions, Sam listens to others' ideas and offers advice for overcoming struggles. 3) Sam seeks to help people unlock business value by making connections between problems and the skills and expertise that could make a difference. 4) Sam strikes me as someone dedicated to seeking growth and willing to go outside his comfort zone.

The firm

Senior product manager, healthcare analytics

Sam and I worked in a small group to try to improve data visualization design within our firm. Sam took action and created a data visualization survey to better understand which tools others were using so that we could tailor design decisions to match our end users. He also helped to create an R library called mr_workflow for R users within the firm. Sam is a great person to connect and work with. He goes out of his way to improve the work experience for others. He takes action when it is needed, which was much appreciated for the projects we worked on together.

Independent work

Technical business strategist, networking, IoT, security, and 5G

I have known Sam for over six months now, exchanging ideas 1-on-1 and participating with him in weekly local indie-hacker meetup meetings which he is a Co-Organizer of. On weekly voice calls, developers and entrepreneurs "talk shop" about side projects and business ideas. Sam is constantly expanding his horizons by learning new skills and he is driven by curiosity and problem-solving. He has helped dozens of people learn to utilize their technical skills outside of their jobs in independent, freelance projects by connecting problems with solutions, and facilitating networking between those with needs or questions and those who have relevant skills, advice, or connections. His quiet reflective nature comes from his ability to listen, digest, then facilitate. He is truly a great asset, and he constantly strives to expand his knowledge and personal network. And he is fun to talk to and work with!

Teaching

Mentor, product and education advisor

Sam is making predictive analytics approachable and accessible to new talent in the actuarial field. It's a tough subject and a hard thing to do, but he has proven he's up to the task. I've observed that he is always looking for ways to improve the experience of his customers and students, as well as the quality of content he publishes. Sam is the kind of hard-working, humble, smart person everyone wants to work with.

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