# Aleksi Kallio AI Solutions Architect. Builder. Former CTO. I design AI and cloud systems that hold up in production, EU-sovereign when it matters, and I still write the code.\* \* Only occasionally these days. Mostly AI writes the code and I review and approve it. [Get in touch](https://www.kallio.cloud/contact/) [What I'm doing now](https://www.kallio.cloud/now/)  ## What I do * ### AI & agents Multi-agent systems, RAG pipelines and AI orchestration, on GCP Vertex AI, Mistral and Azure AI Foundry. * ### Cloud architecture AWS serverless, CDK, Terraform, event-driven and hexagonal architecture. Built to be boring in production. * ### Sovereign when needed EU-resident stacks, EU inference and EU vendors, for when data location actually matters. * ### Technical leadership CTO experience: strategy, team practices, release processes, ISO 27001. ## Featured work * [done AI platform for an ESG SaaS Planmark, CTO (2024–2026) Architected and led the AI platform of an ESG SaaS as CTO: multi-agent systems, RAG-based reporting and AI orchestration on GCP Vertex AI and Gemini. GCPVertex AIGeminiFirebaseTypeScript](https://www.kallio.cloud/work/planmark-ai-platform/) * [live Kassavirta / Codefox Cashflow Codefox Cash flow visualization for SMBs with integrations to multiple fintech apps. Full EU residency, with AI inference moving to Mistral. A Codefox product. UpCloudSupabasePostgreSQLReactMistral](https://www.kallio.cloud/work/kassavirta/) * [building AskForKey Codefox End-to-end encrypted secret requests: send a single-use link, the other side encrypts in their browser. Runs entirely on bunny.net. A Codefox product. Bunny Edge ScriptsBunny DatabaseBunny StorageBunny DNSDeno](https://www.kallio.cloud/work/askforkey/) [All work →](https://www.kallio.cloud/work/) ## Finnish or English, both fine. [aleksi \[at\] kallio.cloud](mailto:aleksi@kallio.cloud)