Juan Requena

AI Contract Review: Built an AI-powered contract review platform that automated risk detection and redline suggestions. Developed scalable microservices with Node.js, TypeScript, and Redis (BullMQ) for asynchronous workflows, covering file ingestion, data normalization, DB persistence, LLM-driven analysis, and real-time user feedback. Delivered a scalable end-to-end contract review system, cutting review time by 50% and improving accuracy.

AI Data Extraction: Developed an intelligent extraction system that identifies customer-defined smart fields (e.g., effective dates, payment terms) across contracts. Implemented bulk scalable extraction, accelerating multi-document processing and significantly reducing manual review time.

AI Assistant (Conversational Chat): Created an AI-driven assistant enabling real-time, context-aware Q&A on contract data. Integrated OpenAI APIs with WebSockets streaming and job queues to ensure low-latency, reliable responses. Optimized token usage, summarization, and routing strategies, reducing costs while maintaining accuracy.

Contract Version Timeline: Designed a timeline visualization for full contract versioning, enabling traceability, side-by-side comparisons, and retrieval of previous versions. Enhanced transparency and compliance for end-users.

Technologies: NodeJS, TypeScript, MongoDB, PostgreSQL, Redis, ReactJS, Docker, AWS, BullMQ, WebSockets, OpenAI API, Langchain / Langgraph, Python, RESTful APIs, NX monorepo, Grafana, Jest, Mocha, Sinon, Playwright

Migrated a monolithic insurance platform to microservices architecture in Typescript/Node.js, improving scalability and maintainability.

Developed RESTful APIs to manage insurance policies, products, coverages, offers, quotes, and broker interactions; integrated with third party services. Built AWS Lambda functions to integrate microservices with Third-party APIs.

Led resolution of live production incidents, ensuring service reliability. Converted complex business requirements for large projects into technical designs and Jira tasks, resolving cross-team challenges and ensuring stakeholder alignment.

Mentored junior developers and contributed to hiring.

Technologies: Typescript / Node.js, Express.js, NestJS, Jest, MongoDB, Kafka, AWS, Lambda, ELK, PostgreSQL, Keycloak

RESTful APIs and development of modules in the backend of Rocket.Chat (instant messaging, video calls) for the mobile application MedsBla. Provides private and secure communication for medical colleges, hospitals.

RESTful APIs for social network project, managing posts, feeds, likes, comments, shares, hashtags, and recommendation systems.

RESTful APIs to manage Medical users. Single Sign-On (SSO) user provider, authentication types: JWT and OAuth2 server/client for the connection between web/mobile and backends.

RESTful APIs for Vademecum project. Standardized responses with different and large databases models (Spain, Latam, Meast, India). Interactions, active ingredients, pathologies...

RESTful APIs for medical college's admin project. including massive user registration (RabbitMQ/ActiveMQ), push notifications, surveys, and analytics insights.

Led migration of a monolithic PHP application to Node.js/TypeScript microservices, improving scalability and performance.

Improve database performance.

Ensured high-quality, testable code with unit, integration, and e2e tests.

Technologies: Node.js, TypeScript, Express.js, Meteor.js, Sockets, Jest, Mocha, Chai, ReactJS, MongoDB, MySQL, Redis, JWT, OAuth2, RabbitMQ, ActiveMQ, AWS EC2, S3, RDS, Elastic Beanstalk, ECS, Symfony 3, Symfony 4, PHP7, Doctrine2, PHPUnit, Linux, Docker, Git, Jenkins, Scrum, Jira, Confluence