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I'm Guilherme Fath, a full-stack product engineer who designs, builds and ships production software across CRM, e-commerce, fitness and real estate. I own product definitions, UX flows, frontend and backend APIs, data modeling, multi-tenant architectures and deployment. I integrate AI agents, messaging, payments, shipping and automation into SaaS platforms. I deploy on AWS, monitor performance with modern tooling, and collaborate with cross-functional teams to deliver user-centric solutions.…I'm Guilherme Fath, a full-stack product engineer who designs, builds and ships production software across CRM, e-commerce, fitness and real estate. I own product definitions, UX flows, frontend and backend APIs, data modeling, multi-tenant architectures and deployment. I integrate AI agents, messaging, payments, shipping and automation into SaaS platforms. I deploy on AWS, monitor performance with modern tooling, and collaborate with cross-functional teams to deliver user-centric solutions.

Guilherme Fath

Full Stack Developer, Back-End Developer, Front-End Developer, +3

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I'm Guilherme Fath, a full-stack product engineer who designs, builds and ships production software across CRM, e-commerce, fitness and real estate. I own product definitions, UX flows, frontend and backend APIs, data modeling, multi-tenant architectures and deployment. I integrate AI agents, messaging, payments, shipping and automation into SaaS platforms. I deploy on AWS, monitor performance with modern tooling, and collaborate with cross-functional teams to deliver user-centric solutions.…I'm Guilherme Fath, a full-stack product engineer who designs, builds and ships production software across CRM, e-commerce, fitness and real estate. I own product definitions, UX flows, frontend and backend APIs, data modeling, multi-tenant architectures and deployment. I integrate AI agents, messaging, payments, shipping and automation into SaaS platforms. I deploy on AWS, monitor performance with modern tooling, and collaborate with cross-functional teams to deliver user-centric solutions.

Available to hire

I’m Guilherme Fath, a full-stack product engineer who designs, builds and ships production software across CRM, e-commerce, fitness and real estate. I own product definitions, UX flows, frontend and backend APIs, data modeling, multi-tenant architectures and deployment.

I integrate AI agents, messaging, payments, shipping and automation into SaaS platforms. I deploy on AWS, monitor performance with modern tooling, and collaborate with cross-functional teams to deliver user-centric solutions.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

Portuguese

Fluent

English

Advanced

Work Experience

Marketing Assistant at Grupo Pegasus · Automotive

May 1, 2023 - December 1, 2023

Supported campaigns, visual communication, social media, promotional initiatives and collaboration with automotive sales teams.

Marketing Assistant at Grupo Pegasus

May 1, 2023 - December 1, 2023

Supported campaigns, visual communication, social media, promotional initiatives and collaboration with automotive sales teams.

Founder & Full-Stack Product Engineer at Fatek Solutions

January 1, 2023 - Present

Built and shipped 5+ business systems across CRM, e-commerce, fitness and real estate, including two SaaS products running in production. Owned product definition, UX flows, frontend, backend, PostgreSQL data modeling, APIs, multi-tenant architecture and deployment. Integrated AI agents, WhatsApp Cloud API, payments, Melhor Envio shipping, webhooks and operational automation. Deployed and maintained services on AWS EC2 with Nginx, SSL, PostgreSQL/Neon, Cloudflare and production monitoring.

Computer Support and Maintenance Technician at Self-employed

May 1, 2019 - May 1, 2025

Provided hardware maintenance, operating system configuration, troubleshooting and technical support for individuals and small businesses.