Guillermo Anta Alonso

rebAI, S.L. — Technical Lead / Software Architect — AI-Assisted & Agentic Software Engineering

• Technical leadership in the re-engineering and modernization of legacy platforms.
• Designed AI-assisted software engineering and agentic workflows with multi-agent orchestration.
• Applied LLM-based code analysis, codebase intelligence, automated code review and AI-assisted testing.
• Designed prompts and instructions, human-in-the-loop systems and guardrails to preserve human control and engineering quality.
• Defined evaluations and quality gates to detect regressions and support reliable delivery.

The Phone House Spain, S.L. — Senior Backend Engineer

• Designed and developed a new architecture based on Java microservices.
• Designed and developed an internal ticket management application.
• Technologies: Spring, Java, PostgreSQL/MariaDB, AWS, Terraform and Docker.
• Achievement: replaced an external ticketing tool, saving more than 100 licenses per year.

The Telecom Boutique, S.L. — Senior Backend Engineer / Tech Lead

• Led a team of 5 developers.
• Led the migration of more than 2,500 JavaScript lambdas to a TypeScript microservices architecture based on hexagonal principles.
• Implemented engineering practices, CI/CD pipelines, testing and improved deployment workflows.
• Technical design, backlog management, code reviews and coordination with infrastructure, vendors and client technical teams.
• Results: reduced AWS costs from €40,000/month to less than €10,000/month; built a document generation service processing more than 60,000 documents per day.

Esker Ibérica, S.L. — Software Engineer

• Developed document automation tools using OCR engines and neural networks.
• Backend development with JavaScript on Azure and continuous collaboration with international teams.

HP Printing and Computing Solutions S.L.U. — Full Stack Developer

• Sole developer of a real-time application for managing network-connected equipment.
• Owned the full lifecycle: requirements, development, deployment and maintenance.
• Technologies: Vue, JavaScript, Node.js, Express, Socket.io and MongoDB.

Silver Storm Solutions, S.L. — Software Engineer

• Developed a cloud CRM with Angular, JavaScript and MariaDB.
• Implemented integrations with Jira, SharePoint and similar platforms.

Graduate in Computer Engineering

Specialized in Software Engineering.

University of Valladolid (Spain).