Daniel Jimenez Maldonado

• Architected a fully serverless, event-driven IIoT Switch Railway Monitoring System on AWS, deployed across 3 major EU operators, improving switch reliability by 20%. • Built KONUX’s AI-powered smart alerting platform (microservices) processing 80M+ train-trace events for near real-time alerts, reducing delays by 20% and maintenance costs by 25%. • Migrated the Switch Maintenance Quality Check System to an event-driven architecture, enabling predictive insights that cut maintenance operations by 66%.

• Engineered core loyalty platform modules and led end-to-end deployment with Spring Boot on AWS EC2, integrating Oracle/PostgreSQL in a distributed system processing 40M+ daily transactions across global partners. • Migrated United Airlines’ loyalty platform to a scalable Spring Boot cloud architecture serving millions of users. • Optimized database performance and backend services, improving data workflows and boosting throughput by 15% for high-volume, real-time transactions.

• Designed and optimized high-performance backend services (Java, Spring Boot, REST) for a global e-learning platform serving 25M+ users and 2M+ monthly active learners, improving API responsiveness and scalability under peak traffic. • Delivered complex product features end-to-end in collaboration with cross-functional teams, increasing release velocity by implementing CI/CD pipelines and improving platform reliability through logging, monitoring, and observability upgrades.

- Developed backend services in Java for Goldcar’s connected car platform, supporting real-time tracking and telemetry for a fleet of over 50,000 vehicles across Europe. - Built secure, real-time data transfer mechanisms to ensure that customer payment status reflects consistently in the connected car system, handling over 20,000 booking updates daily. - Improved system reliability and data integrity, reducing booking-to-vehicle access delays by 30%, enhancing the overall customer rental experience.

Developed and maintained backend modules for 1,000+ Volkswagen & Audi dealerships in Spain, supporting 50K+ monthly transactions. Built real-time sync services handling 100K+ daily updates on inventory, pricing & customer data. Delivered enhancements with product & QA teams, cutting dealer onboarding time by 20% and boosting vehicle availability accuracy by 30%.