OpenRTB, auction logic, SSP/DSP integrations, identity (cookies, universal IDs) and consent (GDPR/TCF).
Async PHP (Swoole) in production, profiling, Redis and Aerospike as hot memory, Kafka and ClickHouse for events. I measure cost per request and bring it down.
Multi-region GCP, weighted progressive rollouts, canaries, A/B tests against the live system and hot deployments with zero downtime.
Usual stack:
Mostly PHP; I've used Node, Go and Python when the problem called for it. What scales isn't the language, it's the system design and how you use memory, queues and data.
Programmatic SSP for apps, web and CTV: 500+ publishers, 160B+ ad requests/month, 190+ countries.
First web version of the product (Google reviews management SaaS) and LLM integration.
E-commerce and affiliate platform. CTO transition: captured the outgoing CTO's knowledge, documented it and handed it over to the new leadership, then stayed on as Tech Lead.
The idea was a partner's; the platform, a sponsored-article marketplace, I built end to end.
Price comparison sites: APIs, high-volume crawlers, CDN and server optimisation.
RTB bidder architecture and exchange integrations: 20 billion auctions a day. Async PHP, Redis, Druid, Elasticsearch, Grafana.
Scaled the ad server to 1 billion impressions a day. Campaign delivery algorithm.
Ad server management system redesign, email marketing at millions of sends a day, and web architecture for public-administration digitisation.
Websites and applications in PHP and MySQL, crawlers in Java, networks and systems. That's where it all started.
Education: Computer Engineering studies, University of the Basque Country (1996–2001).
Born from a price increase at a relative's nursing home. Publishes the fees of 4,867 nursing homes in Spain with source, date and regulation: official gazettes, freedom-of-information requests, company registry, notice boards. Four languages, published methodology, legal review.
PHP 8.5 · Docker · Caddy · MySQL · DuckDB · continuous deployment with GitHub Actions. Live since October 2026.
On async PHP at scale, cost per request in the cloud and hot deployments with A/B tests in production. First articles coming here soon.
Looking for projects where scale and latency genuinely matter: AdTech, media, marketplaces or any high-traffic platform. Remote from Tarragona; hybrid in Barcelona. Spanish native, fluent written English.
