I am a Senior Software Engineer with over 7 years of experience designing and implementing scalable, mission-critical backend systems. I specialize in transforming complex business requirements — from Fintech and Banking Compliance (BNA standards) to high-performance modular architectures — into robust corporate applications using Go, Python, and .NET.
My focus is on building software that delivers tangible business results through Clean Architecture, CQRS patterns, and a deep commitment to Data Integrity and the pillars of Observability (Logging, Tracing, and Monitoring).
- Specialized Backend: Expert in Go (Golang) for high-concurrency systems, .NET for enterprise-grade solutions, and Python for modern backends.
- Architecture & Modeling: Clean Architecture, SOLID, DDD, and Hexagonal Design. Proficiency in C4 Model, UML, and BPMN for strategic system design.
- Database & Data Integrity: Advanced SQL (PostgreSQL, MySQL) with a focus on Schema Mastery (Atlas), Integrity Hashing, and Automated Audit Logs. Experience in NoSQL (MongoDB, Redis).
- Financial Compliance: Deep experience with Banking Standards (BNA), including XML Digital Signatures, gRPC protocols, and automated financial reporting.
- Messaging & Distributed Patterns: Implementation of asynchronous messaging and resilience patterns such as Transactional Outbox and Circuit Breakers.
- Infrastructure & DevOps: Proficient in Docker & Docker Compose, Cloud Storage (MinIO), and CI/CD pipeline automation.
| Project | Description | Status |
|---|---|---|
| Go Enterprise Micro | Industrial-Grade Template for complete microservices. | 💎 Commercial |
| Fixed Asset Management | Enterprise system for automated tracking, depreciation, and audit of corporate assets. | ⚙️ Production |
| Performance Evaluation | Advanced HR platform for competency mapping, 360° feedback, and KPI tracking. | 📊 Production |
I am passionate about sharing knowledge and creating tools that improve developer productivity.
| Project | Description | Highlights |
|---|---|---|
| backend-project-structure | A blueprint for scalable Go applications. | 🏆 87+ Stars |
| golang-modular-software | Complex modular architecture implementation in Go. | 💎 51+ Stars |
| go-nopain | A productivity library to simplify Go development. | ⚡ 49+ Stars |
| golang-pocs | Research & Development (R&D): Proof of concepts for Go features. | 🧪 22+ Stars |
| go-signer-core | Mission-critical engine for XML Digital Signatures (Sefaz/BNA standards). | 🔒 Security Focused |
| Dotnet_Templates | Enterprise-grade templates for ASP.NET Core (REST, CQRS, RabbitMQ). | 🏗️ Architecture |
- Logica_de_Programacao_CSharp: A comprehensive collection of logic exercises based on academic literature. This repository serves as a foundational guide for beginners, with 14+ stars and a focus on clear, functional problem-solving.
I lead and maintain specialized organizations focused on providing production-ready boilerplate and architecture standards across different ecosystems:
- Golang Templates: 🐹 Enterprise-level Go templates including gRPC, WebSockets, and MessagePack implementations.
- Dotnet Templates: ⚡ High-performance .NET templates featuring CQRS, NATS, Redis, and SOAP-to-REST transitions.
- Python Templates: 🐍 Modern Python backends with a focus on MongoDB integration, gRPC, and clean naming standards.
- Leadership: Focused on healthy Tech Lead behaviors, mentoring, and team growth.
- Technical Writing: I share insights on Medium and Dev.to.
- Location: Based in Luanda, Angola 🇦🇴 (Specializing in Remote Work for Brazil 🌍).
- LinkedIn: /in/ortiz-david
- Portfolio: ortizdavid.github.io
"Complexity is a sign of technical debt; Simplicity is a sign of mastery."