Hi, I'm Pablo Vallejo.

Founded a science-first AI mental health platform grounded in Cognitive Behavioral Therapy (CBT), owning the product end-to-end from architecture to public launch.

• Designed and deployed a scalable backend powering real-time AI-driven conversations with LLMs, including an advanced memory system and voice chat under a 1s SLA.
• Architected a sustainable Big Data system on Google Cloud Platform (GCP) to handle sensitive user data with high availability and compliance.
• Launched on the Google Play Store, reaching 1k+ downloads with a 30% 7-day retention rate through continuous data-driven iteration.
• Incorporated the company in Delaware and led legal, privacy and data-handling compliance from day one.

Telecommunications client serving 10M+ subscribers. Owned the core network anomaly detection backend and the real-time Big Data pipeline behind it.

• Engineered the core network anomaly detection backend for a 10M+ client telecommunications network.
• Optimized critical microservices under a 300ms SLA, delivering an estimated 60% reduction in average response time.
• Architected and implemented a real-time Big Data pipeline processing millions of network events daily, integrating Elastic Machine Learning for predictive anomaly detection.
• Redesigned complex queries in ClickHouse, BigQuery and MariaDB, cutting data retrieval latency by 30% and ensuring stability during national peak traffic.
• Deployed and operated containerized services on Kubernetes (Rancher / OpenShift), guaranteeing high availability for mission-critical services.
• Built a real-time client status backend that drastically reduced incident resolution time for the customer support department.

Renewable energy consultancy. Built the backend powering real-time solar generation analytics for a client-facing mobile application.

• Designed and implemented a backend system to process real-time solar panel generation data.
• Created high-performance microservices to serve generation metrics to the client-facing application.
• Contributed to the mobile app interface (Expo / React Native) and ensured seamless backend integration.
• Stepped up to lead the app's final development phase, working in fast-paced 1-week SCRUM cycles.

Independent full-stack work for small and mid-sized businesses across retail and services.

• Designed digital presence and SEO strategies for 10+ SMEs in retail and service sectors.
• Handled everything from domain management to full-stack deployment and ongoing maintenance.