Esneider M.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I'm a Senior Software Engineer with nearly 20 years of experience building, troubleshooting, modernizing, and scaling production systems across backend, frontend, cloud, and DevOps environments. My strongest areas are Java/Spring Boot, C#/.NET, Python, Node.js, enterprise APIs, distributed systems, cloud infrastructure, and DevOps. I also work extensively with Angular and Vue on complex business applications. I have hands-on experience with enterprise platforms and business-critical workflows, including Odoo, NetSuite, ERP integrations, data and ETL pipelines, payment-related systems, fintech workflows, operational platforms, and systems where data accuracy, permissions, reliability, and auditability are critical. I'm particularly effective when a project is technically complex: an existing system needs to be understood quickly, production issues are difficult to isolate, performance is degrading, integrations are failing, architecture needs improvement, or a team needs a senior engineer who can take ownership without constant direction. My core engineering stack includes Java/Spring Boot, C#/.NET and ASP.NET Core, Python/Django/Flask/FastAPI, Node.js/TypeScript, Angular, Vue, PostgreSQL, MySQL, Redis, Kafka, REST APIs, microservices, AWS, Docker, Kubernetes, and CI/CD. Beyond development, I'm strong in production debugging, performance optimization, database and API troubleshooting, authentication and permissions, distributed workflows, cloud deployments, infrastructure, legacy modernization, and release engineering. I've also worked with enterprise integration and automation scenarios involving ERP systems, synchronization pipelines, external APIs, background processing, financial data flows, payment-related logic, and multi-step operational workflows. I use modern AI-assisted engineering tools extensively, including Claude, Cursor, GitHub Copilot, and ChatGPT. I use them for code analysis, debugging, refactoring, test generation, architecture review, documentation, change-impact analysis, and development acceleration. I also work with LLM integrations, RAG, OpenAI APIs, Anthropic APIs, and AI-enabled backend systems. Recent Upwork projects include Spring Boot/PostgreSQL performance troubleshooting and backend/data-pipeline consulting. My completed contracts maintain a 100% Job Success Score with 5-star client feedback, including recognition for senior-level problem solving, code quality, reliability, and ownership. I'm a strong fit when you need someone who can: - Take ownership of an existing production system - Build or modernize backend services and APIs - Diagnose difficult production and performance problems - Work across Java, .NET, Python, or Node.js systems - Build and support Angular or Vue enterprise applications - Integrate Odoo, NetSuite, ERP, payment, and fintech workflows - Design and troubleshoot databases, Kafka, and data pipelines - Work across AWS, Docker, Kubernetes, CI/CD, and production environments - Modernize legacy applications and integrations - Add AI capabilities to existing software - Work independently with technical and product teams If the problem crosses application code, APIs, databases, business workflows, infrastructure, deployment, or architecture boundaries, that is exactly the kind of engineering work I specialize in.