Rafael Miller

Experience

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  Rede Emancipa

  Apr 2011 - Dec 2012

  Professor de Física e Matemática
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  Universidade de São Paulo

  Sept 2012 - Dec 2015

  • Estagiário - Monitor Bolsista

    Aug 2015 - Dec 2015

  • Pesquisador (Iniciação Científica)

    Sept 2012 - Aug 2015
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  Menu.com.vc

  Jan 2016 - Dec 2017

  CTO / Full-Stack Developer

  • Built a marketplace platform for connecting restaurants and grocery stores to numerous suppliers using PHP Magento Framework and MySQL. Created a Backend service using Node to enhance Magento Back-office functionalities by decoupling marketplace purchases and splitting to suppliers via connection with multiple Enterprise Resource Planning systems.• Guided international outsourcing team in developing Android and iOS apps.

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  Hypercube.be

  Jan 2018 - Nov 2019

  Freelancer Full-Stack Developer

  • Developed enterprise applications tailored for internal and B2B file management, as well as digital signature systems used in Radiodiagnosis and Nuclear Medicine document workflows. Full-stack app created with Vue, Node, MongoDB and AWS EC2 infrastructure.• Conceptualized and constructed an e-commerce platform for the sale of online courses, with primary focus on exam preparation for the Brazilian Bar Association (AOB) approval assessments. This project was executed using PHP Magento Framework and MySQL. Show less

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  Neomove

  Jun 2018 - Nov 2019

  CTO / Data-Science and Engineering Leader

  • Guided a team of 18 Developers and Data-Scientists consultants execution of numerous Data and Machine Learning proof of concept projects for major Brazilian enterprises.No-Churn Model: solution that effectively identified "fake-canceling" calls and automated discount offers, resulting in annual savings exceeding $10 million.Data Warehousing: Data Lake infrastructure and ETL processing using Python, AWS Redshift, AirFlow, Spark and Hadoop for in-depth analysis of telemarketing call data, enabling pattern recognition and creating new Audible Response Unit pathways, reducing over 6% in maintenance-related call issues.• Machine Learning Engineering Products: Continuous learning models for transcribing and clustering millions of monthly calls, Constructed company dashboards for data analysis utilizing Vue and ML models using AWS Redshift, SageMaker and Lambda. Show less

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  FRST - Falconi Road of Skills and Talents

  Nov 2019 - Oct 2020

  CTO / Full-Stack Software Engineer

  • Led the team of five developers into implementing a B2B professional education solution using the JavaScript technologies with React, React-Native, Node, MySQL using AWS Cloud infrastructure.• Transition from outsourced development model to in-house software engineering team; Application of Scrum and Agile methodologies for measure and monitor feature delivery. Improvement for the technical product knowledge, accelerating feature development, enhancing product quality and reducing the development costs by over 65%. Show less

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  Lampejo

  Nov 2019 - Jan 2024

  CEO / CTO & Founder

  • Designed and developed an educational WebApp and API using React, Node, DynamoDB and a React-Native App. This platform supports high-school students in their preparation for the ENEM (SAT-like exam). Actually with over 56,000 Monthly Active Users and 200,000 app downloads.• Implemented scalable and cost-effective infrastructure in AWS with Serverless Framework that serves millions of requests daily. Fast MVP / Lean Startup iterations and UX/UI groups with early-users using Figma and Maze to validate initial designs concepts.• Integration with OpenAI's GPT-4 for offering essay corrections expanding the app capabilities.• Executed a backend architecture migration, adopting TypeScript, Clean/SOLID Principles, Test-Driven Development (TDD), high-coverage testing, Introduction of CI/CD pipelines with GitHub Actions; improved maintainability, understandability and flexibility, reducing average bug fix time by 30% and onboarding time for interns and junior developers considerably. Show less

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  Mendable

  Dec 2023 - now

  Principal Full-Stack Developer
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  Firecrawl

  Apr 2024 - now

  Principal Full-Stack Developer

  • Design and implementation of scalable solutions for an open-source crawler/scraper platform tailored to LLM pipelines, enabling data processing for clients like Zapier and handling hundreds of thousands of daily scraping requests.• Oversee the open-source community by addressing feedback, reviewing contributors’ code, and fostering collaboration to continuously improve the platform’s capabilities.• Build and maintain a robust front end using Next.js and React.js while optimizing backend systems with Express.js and BullMQ to meet evolving customer needs. Show less