Juan Requena

AI Contract Review: Built an AI engine to analyze contracts and suggest redlines with optimized workflows. AI Data Extraction: Developed a feature to extract smart fields at scale, reducing manual review from contracts. AI Assistant: Enabled real-time Q&A using OpenAI APIs, WebSockets. Contract Timeline: Developed versioning visualizations for traceability, comparisons and retrieval of previous versions. Tech: NodeJS, TypeScript, MongoDB, Redis, React, Docker, OpenAI API, BullMQ, Grafana, Jest, Mocha.

Migrated a monolithic insurance platform to microservices in TypeScript/Node.js, improving scalability. Developed REST APIs for policies, products, quotes, and broker interactions, integrating third-party services via AWS Lambda. Led production incident resolution, translated complex requirements into technical designs and Jira tasks, and mentored juniors. Tech: TypeScript, Node.js, Express, NestJS, Jest, MongoDB, Kafka, AWS, Lambda, ELK, PostgreSQL, Keycloak.

Developed RESTful APIs and backend modules for MedsBla (secure medical communication via chat/video). Built APIs for social networks, SSO auth (JWT/OAuth2), Vademecum drug data, and medical admin systems (RabbitMQ, analytics, notifications). Led migration from PHP monolith to Node.js/TypeScript microservices, boosting scalability and DB performance. Tech: Node.js, TypeScript, Express, MongoDB, Redis, RabbitMQ, AWS, Docker, React, Jest, PHP, Symfony.

Developed an internal web app (frontend & backend) for managing LaLiga employee expense sheets (travel, representation, transport) with role-based limits. Designed approval workflows with status tracking, notifications, and hierarchical routing to managers and admin. Added history, user profiles, charts, and reports. Tech: Symfony 3, PHP7, MySQL, Doctrine2, HTML5, JavaScript, jQuery, Ajax, CSS3, Linux, Git, Jira.

Built and maintained admin panels for high-traffic download webs (e.g. mp3.es, uTorrent.es, jdownloader.com). Integrated third-party APIs: advertising affiliates, browser extensions, SMS premium, Facebook/Twitter auth. Technologies: Symfony 3, PHP7, MySQL, Doctrine2, HTML5, JavaScript, jQuery, Ajax, CSS3, Linux, Git, Jira

Developed and maintained high traffic eMule.com websites (software, games, videos), handling frontend and backend functionality. Integrated third-party APIs (advertising affiliates, browser extensions, SMS providers) and implemented SEO improvements for better search engine visibility. Technologies: Zend Framework 2, PHP, MySQL, HTML5, JavaScript, WordPress, jQuery, Ajax, Linux, Git, AWS EC2, AWS RDS, Piwik, Google Analytics, SheerSEO

Developed an intranet web application to manage company accounting, including reports, tables, and filters for account history and balances. Technologies: PHP, HTML, JavaScript, jQuery, Ajax, PostgreSQL, TcpPDF, PhpExcel