Guilherme Fernandes
Tech Lead at Quantica
São Paulo, Brazil
Summary
👤
Senior🎓
Top SchoolGuilherme Fernandes is a tech lead and full-stack engineer with 13 years of experience building scalable web and cloud-native systems, currently leading engineering at Quantica and projects like Savings Collaborative from São Paulo. He combines deep hands-on skills in TypeScript/JavaScript, PHP, Node/Express, React and relational databases with extensive AWS operational experience (EC2, RDS, S3, CloudFront, Elastic Beanstalk), enabling reliable distributed deployments. In recent years he has specialized in applied AI—LLMs, RAG, embeddings, Pinecone and orchestration with LangChain/LangGraph—bringing production-ready AI features into customer-facing products. His background includes transitioning legacy backends to modern architectures, driving data-informed dashboards with Metabase, and close collaboration with field teams to turn user insights into product improvements. Early work on World Bank’s Evoke and socially focused projects like HerMoney and Savings Collaborative give him a practical, empathetic approach to technology for social impact. Colleagues note his clear, assertive communication and aptitude for translating product needs into maintainable, well-documented code.
13 years of coding experience
9 years of employment as a software developer
Bachelor, Information Systems, Bachelor, Information Systems at University of São PauloInstituto Federal de Educação, Ciência e Tecnologia de São Paulo
Portuguese, English, Spanish
Github Skills (3)
ruby-on-rails2
rails2
ruby2
Github contributions (5)
Guihrmsfo/restrot
Sep 2016 - Nov 2016
Contributions:89 PRs, 137 pushes, 66 branches in 2 months
FuiOrganization/ruby_backend
Sep 2017 - Dec 2017
Contributions:33 PRs, 83 pushes, 28 branches in 2 months
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