--- title: Stratos Theodorou — Cloud, Data & Applied AI description: Hands-on engineer and technical co-founder. From customer problem to production across real-time data platforms, cloud services and applied AI. location: Athens, Greece contact: stratos.theodorou@gmail.com linkedin: https://www.linkedin.com/in/stratostheodorou/ cv: /Stratos_Theodorou_CV.pdf --- # Stratos Theodorou **Cloud, Data & Applied AI** · Hands-on engineer · Technical co-founder · From proof of concept to production Product-minded engineer and technical co-founder with 15+ years of turning customer problems into cloud platforms, real-time data services and AI solutions. Takes engagements from discovery and architecture through proof of concept to production, and stays accountable afterwards. ## Key facts - **10,000 weather stations** streaming real-time data into the WeatherXM platform; built its proof of concept and helped build the production system. - **National grid:** designed, built and operated the weather-data service used by ADMIE (Greece's transmission system operator) for grid balancing; two years in production. - **10 years:** sole technical and customer owner for Fysiko Aerio's gas and electricity demand-forecasting data, since 2016. - **€500k+:** follow-on projects opened by an industrial IoT pilot at Olympia Odos. ## Selected customer work ### Real-time data — WeatherXM Built the proof of concept and helped build the production platform that ingests real-time data streams from 10,000 weather stations: multi-instance ThingsBoard, Kafka and PostgreSQL. Built the first Android app and the client-facing API on top of it. ### Energy — ADMIE Independently designed, built and operated the weather-data backend used by Greece's electricity transmission system operator to support national grid balancing: Node.js services, message queues and document storage. Migrated the production system to Azure single-handedly. Two years in production. ### Energy — Fysiko Aerio Sole owner of the customer relationship and technical delivery since 2016. Built and maintains the weather-data services behind gas and electricity demand forecasts for Athens and Thessaloniki, reviewing requirements with the customer and adapting the systems as they evolve. ### Industrial IoT and edge AI — Olympia Odos Built the edge and cloud stack for a motorway-tunnel jet-fan monitoring pilot: RevPi gateway, local time-series storage and processing, synchronization with ThingsBoard. Installed and commissioned sensors on site overnight, performed FFT-based vibration analysis and co-authored the customer report. The pilot led to a €200,000 follow-on project and opened the way for a €300,000–€400,000 smart-camera situation-awareness project, where he helped build the edge-to-cloud pipeline: machine-vision algorithms on NVIDIA edge devices streaming detection events to the cloud. ## Applied AI (current work at WeatherXM) - **Company-wide AI adoption:** led the move to agent-led work across software, support and business operations (160 repositories). Recommended and helped implement Open Knowledge Format as the specification for the shared company knowledge base; configured integrations for a Slack-based agent that analyses tickets and leads, gathers requirements, writes code and operates cloud infrastructure. - **AI governance in practice:** multi-agent delivery workflows with approval matched to risk — low-risk website changes ship directly; backend changes require a human-reviewed pull request. - **Retrieval-grounded support:** Dify-based first-line support agent grounded in help-desk docs and historical tickets, with escalation to a person. - **New AI product:** [agent.weatherxm.com](https://agent.weatherxm.com/) — a weather-data API that AI agents discover and pay for per request (x402), with marketplace listings and automated deployment on Cloudflare. - **Forecasting & data science:** backtesting pipeline evaluating a time-series foundation model (TimesFM) against weather prediction markets; evaluated GenCast, Aurora, AIFS ENS and XGBoost post-processing for point-location wind forecasts. - **Prototyping:** proposed a mobile AI assistant and led two AWS AI hackathon teams; the assistant reached production within one month. Co-presented the AWS for Startups keynote, October 2025. ## Experience - **WeatherXM** — Co-founder, 2021–present. Founder & Builder (2025–), Chief Product Officer (2023–2025), Head of Engineering (2021–2023). - **Ex Machina** — Co-founder, May 2015–present. Full-stack and cloud engineering, customer delivery and UX. - **Globo** — Lead Android Developer, 2014–2015. - **OpenCanvas** — Co-founder, Android & Mobile UX Engineer, 2013–2014. - **NCSR Demokritos** — Research Associate, 2011–2013. - **Mobzili** — Android Developer & UI Designer (part-time), 2011–2013. ## Technical capabilities - **Solution engineering:** requirements discovery, architecture trade-offs, proofs of concept and pilots, customer demos, technical proposals, UX-led product design. - **Data:** real-time streaming and IoT ingestion at scale (Kafka, MQTT, edge gateways); edge video-analytics event streams; PostgreSQL, MySQL, MongoDB (earlier Cosmos DB); SQL; data-lake querying and ETL (Athena, Glue); forecasting and signal analysis. - **Cloud & distributed systems:** cloud infrastructure, cross-cloud migration, event-driven architectures, messaging, caching, object storage, edge networking. AWS and Cloudflare; earlier production work on Azure. - **Applied AI:** knowledge-grounded (RAG) assistants, multi-agent workflows, tool integrations, risk-based human review. OpenClaw, Dify, Claude, Codex; exploring Azure AI Foundry. - **Software:** full-stack web and mobile, REST APIs, GitHub-based CI/CD. TypeScript / Node.js, Java / Android. ## Education - MSc, Human-Computer Interaction with Ergonomics — UCL, 2010 (Distinction; dissertation hosted by Sony Computer Entertainment Europe). - MEng, Electrical & Computer Engineering — Aristotle University of Thessaloniki, 2008. Languages: Greek (native), English (full professional proficiency).