Baltasar A.

I’m an AI and Backend Engineer specializing in production-ready LLM applications, scalable backend systems, and workflow automation. I currently work at one of the largest technology companies in Latin America, where I contribute to AI-powered solutions using LLMs to improve digital customer experiences and operational workflows. My background also includes several years building high-traffic backend systems in the fintech sector. Unlike developers who focus only on prototypes, I can help you build the complete system around an AI solution: backend services, APIs, business logic, data workflows, integrations, monitoring, and deployment. My main areas of expertise include: • LLM-powered applications and AI agents • AI workflow and business-process automation • Backend development with Go and Python • REST APIs, microservices, and third-party integrations • Fintech systems, transaction flows, KYC, and user validation • PostgreSQL, Docker, AWS, and GCP • Data processing, analysis, and automation Before moving into software engineering, I worked as a Process Engineer and completed an Erasmus Mundus Master’s degree in Nanoscience and Nanotechnology in Belgium and Germany. This background gives me a structured, analytical approach to complex systems, experimentation, optimization, and problem-solving. Why clients work with me: • Production experience in a large-scale technology environment • Strong combination of AI, backend engineering, fintech, and data • Clear communication in English and Spanish • Experience working in international and Agile teams • Proven Upwork track record with a 5-star review and more than $5,000 billed I can help you turn an AI idea into a reliable product—not just a demo.