Xavier Mas Leszkiewicz
Engineering leader — distributed systems, cloud & AI at scale.
10+ years shipping at scale — Telefónica (IPTV data across two continents), Elliptic (blockchain forensics), General Motors (serverless systems), eDreams (ML in production).
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Track record
Proof, not promises
2 continents, 1 pipeline
Telefónica
Merged Spain and LATAM's IPTV event infrastructure into a single terabyte-scale pipeline serving millions of households (Python, Kafka, MongoDB).
15-person product team
Elliptic
Led feature delivery as second-in-command on Elliptic's blockchain investigation product — graph-based cross-chain forensics used by institutional compliance analysts.
100% serverless
General Motors
Designed and built GM's alert and notification system — TypeScript, API Gateway, Lambda and DynamoDB, architected for bursty traffic with zero servers to manage.
Now
What I'm building
Founder & CTO, BlueBerryBytes ↗
Running a product and engineering studio from Dubai — leading engineering across several funded startups in parallel, architecting AI-driven, cloud-native systems.
Fractional CTO for funded startups
Owning technical strategy, architecture and engineering operations for companies like Dress Up & House Group, Qantara Sports and Dawlati.
Building Plan AI
An open-source AI meeting assistant for software teams — from recorded meeting to scoped tickets, specs and diagrams.
Plan AI
From meeting to shipped tickets
Plan AI records your engineering meetings, understands your codebase through a code graph, and automatically produces properly scoped Jira, Linear or Trello tickets, technical specs and architecture diagrams. Open-source core, built at BlueBerryBytes.
