André Paul Grandsire

Senior Software Engineer with over 10 years of experience, originating from ERP systems and evolving to modern web applications and scalable architectures. Focus on backend development, legacy system modernization, and API development, connecting technology to business rules in financial, accounting, fiscal, human resources, and corporate contexts.

Experience with PHP (Laravel), Node.js (NestJS), TypeScript, and cloud environments (AWS and GCP). Combines product vision — built as founder of own software company — with technical depth to modernize legacy systems and scale applications.

Software Engineer at Xtreed (2023-01 – 2026-01)

Worked in an educational e-commerce SaaS environment, with products over 5 thousand sales and global 6-digit revenue, focused on application evolution, architecture modernization, and infrastructure implementation.

• Developed APIs and integrations to support product operations in SaaS environment
• Evolved systems with focus on scalability, organization, and maintenance
• Set up environments with Docker and cloud (AWS/GCP)

Founder & Full Stack Developer at Startap Desenvolvimento Digital (2019-01 – Present)

Developed customized solutions (internal and external), with over 5 projects delivered that served more than 100 end users.

• Developed web applications and digital solutions focused on customer acquisition and operations
• Implemented customized solutions for specific business needs
• Built reusable components and internal development patterns
• Integrated with MySQL databases and external systems
• Defined architecture and technical decisions for digital product evolution

Systems Developer at SIAGRI (2020-01 – 2021-12)

Worked on agricultural ERP in Delphi 7 and Microsoft SQL Server, with complex business rules and critical operational processes.

• Implemented and maintained agricultural ERP in Delphi 7 and Microsoft SQL Server
• Fixed bugs and inspected defect reports before development acceptance
• Provided technical support for complex business rules

Financial Coordinator at Ability Gestão Contábil (2017-01 – 2019-12)

Managed financial administration for accounting office and third parties, connecting financial management to fiscal and accounting processes.

• Managed accounts payable and receivable and budget restructuring
• Issued and verified invoices
• Handled accounting and administrative organization for the office and third parties

Developer at Santri Sistemas (2017-01 – 2017-12)

Worked on Desktop environment for enterprise ERP, facilitating inventory management, organization, and cataloging of over 1,500 registered items.

• Implemented ERP for construction materials segment
• Participated in creating the Warehouse module
• Implemented product storage and location processes
• Integrated with data collectors for inventory verification

Developer / R&D / Web Designer at InfoMais Sistemas (2012-01 – 2016-12)

Worked on internal and external tools, providing technical support and assistance to over 40 clients with hundreds of weekly sales. Gained broad experience in critical areas such as Billing, Finance, and technical documentation.

• Implemented and maintained ERP in Delphi and PostgreSQL
• Developed automations for internal processes
• Configured and maintained pipelines using Jenkins
• Automated Delphi builds
• Created Batch scripts to optimize repetitive tasks
• Improved software delivery processes
• Developed institutional website in Ruby on Rails and customer service backend

IT Technician at ART LENS Distribuidora de Produtos Ópticos (2009-01 – 2010-12)

• Deployed ERP for laboratories, with training and technical support for employees
• Administered corporate networks and Linux and Windows servers