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Guilherme Fath

Experience

Engineering shaped by real service work.

Before building products, I worked close to users, support requests, sales teams and day-to-day business problems.

Fatek Solutions

Founder & Full-Stack Product Engineer

May 2025 to Present

Building SaaS products and internal systems for teams that need their sales, finance, communication and automation work in one place.

  • Built and shipped 5+ business systems across CRM, e-commerce, fitness and real estate.
  • Designed and developed two SaaS products that are live with real users.
  • Worked across product architecture, frontend, backend, data modeling, integrations and infrastructure.
  • Developed systems involving AI agents, WhatsApp, payments, shipping, inventory and operational dashboards.
  • Deployed and maintained applications and APIs after launch.
  • Turned messy business processes into screens, data models and reliable product behavior.

Self-employed

Computer Support and Maintenance Technician

May 2019 to May 2025

Handled computer support, maintenance and troubleshooting for people and small businesses that needed practical help, not jargon.

  • Diagnosed hardware, software and operating system issues.
  • Performed computer assembly, upgrades and preventive maintenance.
  • Installed and configured systems, drivers, applications and peripherals.
  • Assisted individual and small business clients with troubleshooting and technical recommendations.
  • Managed service requests and customer communication independently.

Grupo Pegasus

Marketing Assistant

May 2023 to December 2023

Worked close to the sales floor, supporting campaigns, social media and day-to-day marketing execution for an automotive group.

  • Supported digital and offline marketing initiatives.
  • Created and adapted visual materials.
  • Assisted with social media, campaigns and promotional actions.
  • Collaborated with automotive sales teams.
  • Supported daily marketing operations and reporting.