Senior Backend Software Engineer
C#, ASP.NET Core · Clean Architecture · REST APIs · DevOps (CI/CD)

📍 Aparecida de Goiânia – GO, Brazil
💼 10+ years of experience building robust and scalable backend systems

Backend Software Engineer with over 10 years of experience designing, developing, and maintaining enterprise-grade systems.

Strong advocate of Clean Architecture, SOLID principles, and Domain-Driven Design (DDD), with solid experience handling complex business rules, especially in financial and accounting systems.

One of my key achievements was optimizing a critical process, reducing execution time by over 90%, delivering significant performance and cost gains.

I value technical leadership, collaboration, and continuous improvement, always focusing on quality, scalability, and long-term maintainability.

Feb 2023 – Present

• Design and maintenance of RESTful APIs in .NET Framework and .NET Core
• Development of geolocation, messaging, and financial automation services
• Integration with Pix CNAB, WhatsApp APIs, and multiple third-party services
• Worked with Intercom, Postmark, Meta API, Google Maps, Here API, AWS SNS, Azure Service Bus, Amazon S3 & Rekognition
• Applied Clean Architecture, SOLID, and DDD
• Reduced CPU usage by 40% and API latency by up to 50%
• Integrated OpenAI for audio-to-text transcription

Jan 2019 – Feb 2022

• Full ERP modernization, migrating from VB6 to VB.NET
• Modernization of core modules: Accounting, Fiscal, Payroll, eSocial, Condominium, and Core Manager
• Database migration from Microsoft Access to Firebird and MySQL
• Integration with Tecnospeed for fiscal automation
• End-to-end involvement: analysis, development, deployment, and support

Apr 2016 – Feb 2023

• Development and maintenance of desktop ERP systems
• Led VB6 → VB.NET migrations
• Integrations with FPW (LG Sistemas) for HR and payroll
• Mentorship of junior developers and promotion of best practices
• Strong exposure to complex accounting and financial rules

• Postgraduate Degree in Software Architecture & AI Solutions
  XP Educação (2025 – 2026)

• Bachelor’s Degree in Information Systems
  UNIALFA (2013 – 2018)

• Microsoft Certified: Azure Fundamentals
• Solutions Architect – IGTI

• 💼 LinkedIn: https://www.linkedin.com/in/seoeliseu
• 📧 Email: seoeliseu@gmail.com

🚧 Profile README under continuous improvement.