# Rafael Santos

> Rafael Santos is a angel investor backing Venture Capital and Legal. See 18 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: Angel Investor
- Total investments: 18
- Last investment: Jun 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/rafaelsantos/
- X (Twitter): https://twitter.com/rafaelstartup
- Website: https://linktr.ee/rafaelstartup
- Facebook: https://www.facebook.com/rafael.costa.santos

Rafael Santos is a angel investor focused on Venture Capital and Legal. ______________________________SUMMARY: AI Agents Engineering, Systems Design, Tech Leadership:★ DirtAI, MIT Educator (Generative AI & AI Agents, Data Leadership, Marketplaces)★ FCJ Startup Ecosystem (320+ Startups) Investor and AdvisorPast: CPO @ MC1, Product Leader @ Creditas, Founded 4 startups (ARR>$2M, Team>50,Funding>$2M)I am an AI-first Tech Engineer, CTO, and advisor with 25+ years of experience scaling startups and SaaS products. As a founder of 4 startups and Product & Tech leader of 2 scale-ups, I’ve developed digital solutions across IoT, Consumer Behavior, ERP for SMBs, IP Telephony, Used Car and Real Estate Platforms, on B2B and B2C models.______________________________WHAT DRIVES ME:Passionate about using AI and emerging technologies to solve complex challenges and build scalable products. Experienced in team building, managing large engineering teams (100 people), aligning product vision with business goals.______________________________HIGHLIGHTS:★ AI & Emerging TechLeading AI-driven projects since 2016 with expertise in LLMs (Frameworks, Agents, RAG), delivered solutions like foot-traffic analysis, WiFi fingerprinting and LLM-based solutions★ Entrepreneurial and Product LeadershipFounded 4 startups, scaling 10+ SaaS products from zero to $200k/month in early stages, and up to $1M/month in scale-ups. Today acting as Strategy/Tech Advisor and Fractional CPTO for startups★ Engineering Leadership25y leading engineering teams, hands-on creating and launching 10+ digital products (SaaS and Services) from scratch, scaling teams from 0 to 100★ Educator @ MIT Professional EducationTeaching Generative AI, Data Leadership and Marketplace★ Technical ExpertiseHands-on with strong technical background in system architecture and platform scaling- Distributed systems: Microservices, Kubernetes, API, Queue Management, AWS, Docker, Terraform- Languages: Typescript/Javascript, C/C++, Golang, PHP, Java, Assembly, Basic, Perl, Shell Script- Backend: Node.js, NestJS, Fastify, FastAPI- Frontend: React, Vue- Gen AI: Agents, LLMs, RAG, Computer Vision, Python- Data Engineering: Airflow, Spark, Queue Management- IoT: Embedded systems, OTA updates, real-time data processing______________________________NOTABLE PRODUCTS:★ Foot-traffic Analysis: AI-driven insights, boosting foot traffic and optimizing store placements (Consumer Behavior, Traffic Flow, Store Expansion Planning, Rent Negotiation, Store Closure Strategy)★ IoT Platform: Managed 1,200+ IoT devices globally, processing 20M+ requests/hour★ Climate Footprint Monitoring: Advanced monitoring of forest cover and carbon accounting★ VoIP and Gatekeeper in 2003 - first 2 VoIP providers in Brazil

## Contacts

5 contacts available for Rafael Santos: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/rafael-santos-fd37?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Venture Capital | 4 | 22% |
| Legal | 2 | 11% |
| Legal Tech | 2 | 11% |
| Angel Investment | 2 | 11% |
| AgTech | 1 | 6% |

14 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Angel | 7 | 39% |
| Funding Round | 6 | 33% |
| Venture - Series Unknown | 4 | 22% |
| Equity Crowdfunding | 1 | 6% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| InvestPlus | Invest Plus connects to quality alternative investments, providing secure opportunities in new tech for a better future. | $47.7K | Equity Crowdfunding | Jun 01, 2024 | https://investplus.vc/ |
| Vetor AG Ventures | Venture Builder - A partnership between FCJ and Andrade Gutierrez |  | Angel | Dec 26, 2023 | https://vetorag.ventures/ |
| RevisaPrev | RevisaPrev is a technology company that specializes in retirement review and pension planning services. It presents an unprecedented technological solution that is able to plan and revise a retirement. |  | Angel | Jun 07, 2023 | https://revisaprev.com.br/ |
| FCJ Triangulo Venture Builder | FCJ created Open Venture Builder, or Venture Builder 4.0, where it incorporates the culture of open innovation together with the traditional venture builder, that is, instead of creating its own startups, the market seeks existing innovative solutions to develop them and support them through their ecosystem.Innovation is in the DNA of FCJ VentureBuilder and it was believing that in 2018 the FCJ Triangulo was launched. FCJ Triangulo is the branch of the FCJ Group in Triangulo Mineiro and Alto Paranaiba, with operations in the segments: agtech edtech, fintech, logtech, retail and health tech. We support and are present in the regional ecosystem by encouraging companies and investors on the one hand and developing projects, startups, on the other. Our purpose is to develop projects that deliver to society (regional, Brazilian and worldwide) technological solutions for a much better world with more efficiency, transparency, productivity, gain in scale, longevity and humanization and on the other hand a very interesting return for investors. |  |  | May 04, 2023 | https://www.fcjtriangulo.com.br/ |
| Algar Telecom Venture Builder | Venture firm of Algar Holding. |  | Venture - Series Unknown | Mar 15, 2023 | https://algartelecomventurebuilder.com.br/ |
| Energy Hub Ventures | Venture Builder - A partnership between FCJ and Sai do Papel (SdP) |  | Angel | Feb 01, 2023 | https://energyhub.ventures/ |
| FCJ Venture Builder | FCJ Venture Builder, was the pioneer in the Venture Builder branch in Brazil, starting its work in 2013. Since 2018, it has licensed its Venture Builder and Corporate Venture Builder model, in the modalities B2C, B2B and B2G. |  | Venture - Series Unknown | Jan 10, 2023 | http://www.fcjventurebuilder.com |
| ATMosfera Ventures | Corporate Venture Builder - partnership between FCJ and Tecban |  | Angel | Dec 21, 2022 | https://atmosferaventures.com/ |
| NovoAgro Ventures | We are a Venture Builder in the Agribusiness sector, which continuously selects applied innovations and startups focused on the agribusiness sector, who have a passion for the business purpose with a focus on generating value for the market. |  | Venture - Series Unknown | Dec 16, 2022 | https://novoagro.ventures/ |
| Capri Venture Builder | Capri Venture Builder is a pioneer in the development of startups on pet markets. The company's goal is to make the pet world even more tech, investing in innovative and disruptive startups. |  | Angel | Dec 13, 2022 | https://capri.builders |

10 of 18 investments shown.

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## FAQ

### What does Rafael Santos invest in?

Rafael Santos invests primarily in Venture Capital, Legal and Legal Tech startups, most often at Angel and Funding Round stage. Most of the 18 investments tracked by Shizune back companies in Brazil. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### How do I contact Rafael Santos?

Public channels for Rafael Santos include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.

### When did Rafael Santos last invest?

The most recent investment recorded for Rafael Santos closed in Jun 2024. Shizune tracks 18 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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