Senior Backend Engineer focused on long-lived systems.

I design, build, and operate backend software that has to remain reliable over many years, often in regulated and resource-constrained environments. My work sits at the intersection of backend engineering, systems reliability, and real-world process modeling.

I care about clarity over novelty, explicit models over hidden magic, and software that people actually use without friction.

• Backend systems that act as a single source of truth
• Process-driven software (workflows, roles, traceability, auditability)
• Long-running production systems with low operational cost
• Conservative, maintainable architectures over trend-driven designs

Most of my professional work has been in environments where systems cannot be rewritten every two years and failure has real consequences.

• Languages & Frameworks: Python, Django
• Databases: PostgreSQL, SQL (data validation, reporting, traceability)
• Systems: Linux, production operations, system reliability
• Infrastructure: Docker, Nginx
• Architecture: Process modeling, modular monoliths, long-lived system design

I deliberately avoid over-claiming experience in areas I haven’t operated at scale in production.

• Senior Backend / Systems Engineer in government-regulated environments
• Experience supporting ISO 9001 quality management systems
• Former ISO 9001 Lead Auditor (IRCA)
• Comfortable working close to real users, auditors, and operational staff

Here you’ll find:

• Backend projects focused on clarity and maintainability
• Experiments and tools extracted from real operational needs
• Documentation-first approaches to system design

Not everything here is polished or trendy. Most of it is honest.

📍 Tlaxcala, Mexico · 🌍 Remote
🔗 LinkedIn: https://www.linkedin.com/in/javier-sanchez-toledano