# Romain Untereiner **Engineering leader & CISO, entrepreneur, lecturer** Barcelona, Spain · romain@untereiner.com · [romain.untereiner.com](https://romain.untereiner.com) · [LinkedIn](https://www.linkedin.com/in/romainuntereiner) · [GitHub](https://github.com/romainframe) ## Summary Engineering leader with over a decade across telecom, venture capital, and B2B SaaS. Telecom engineer by training, hands-on across infrastructure, backend, security, and AI. Co-founded and sold a cloud telecom company (Cantoo, acquired by 42com), built the technology backbone of a €150M VC platform, and now lead engineering and information security at Consentio while teaching the "Developer to CTO" module at Harbour.Space University. ## Experience ### Director of Engineering & CISO — [Consentio](https://consentio.co) 2023 – present, Barcelona - Lead the engineering organisation (backend, frontend, mobile, QA) of a fresh-produce trading platform serving 7,000+ users and 1,000+ producers; own technical direction, hiring, and delivery reporting to the board and investors. - As CISO, own the ISO 27001:2022, ISO 27017, and ISO 27018 information security management system: audits, enterprise security questionnaires and RFP responses, pentest remediation, and IAM hardening with enterprise SSO (OIDC, SAML, SCIM). - Drive real-time trading and automated ordering used by retailers such as Aldi, Carrefour, Kroger, E.Leclerc, and Metro, including multi-month ERP integrations (SAP, Microsoft Dynamics) with enterprise retail groups. - Took AI order-document processing (Magic Order) from a template-based vendor to in-house multi-model LLM parsing with a fallback ladder, onboarding 15+ retailer formats in one semester. - Run platform operations on GCP/GKE with Terraform: cluster migration, autoscaling resilience, observability, incident response and post-mortems; led technical due diligence and platform-consolidation options for a strategic acquisition. Stack: Go, React, React Native, PostgreSQL, GKE, Terraform, CircleCI, Prometheus, Sentry, Vertex AI, Vanta ### Co-Founder & CTO — [Cantoo](https://cantoo.co) 2021 – present - Designed and built the full stack of a cloud telecom platform (voice, SMS, DID) from zero: cloud-native distributed voice infrastructure with auto-scaling and auto-healing. - Built a real-time routing engine optimising cost, quality, and latency, plus a real-time billing pipeline. - Registered telecom operator in the UK, France, and Germany; profitable in under two years at €400k annual revenue. - Acquired by 42com in 2024; led the full post-acquisition technical integration. - Built and led a remote engineering team on a decentralised microservice architecture, with 24/7 on-call. Stack: Kubernetes, Go, TypeScript, Vue/Nuxt, Kamailio, FreeSWITCH, PostgreSQL, ClickHouse, Redis, Pulsar, Terraform, ELK, GCP/AWS, GitLab CI ### Lecturer — [Harbour.Space University](https://harbour.space) 2021 – present, Barcelona - Created and teach the "Developer to CTO" Master module: business strategy, system design, and technical leadership. - Mentor development and data science students from 20+ countries; students build real ventures during the module. ### Founder & CEO — [Kamina.io](https://kamina.io) 2019 – present - Founded a subscription-based engineering studio for SaaS companies across Europe: 40+ teams shipped, 48-hour average turnaround, 99.99% uptime SLA. - Deliver senior engineering, premium managed hosting, and open-source tooling. - Run a GitOps platform (Flux) deploying curated open-source stacks on customers' Kubernetes clusters, and maintain a multi-tenant SaaS template (React Router, Convex, Tailwind) reused across client projects; incubating Alich.ai, an LLM-powered Kubernetes SRE agent in Go. Stack: React, Next.js, React Router, TypeScript, Convex, Tailwind CSS, Cloudflare, Kubernetes, Flux, AWS, GCP ### Co-Founder & CTO — Algora 2019 – 2020, Barcelona - Co-founded a value-added voice services company for professionals and communities: designed and built the platform from zero and ran 10 months of commercial activity before the venture wound down. Stack: Kubernetes, Kamailio, FreeSWITCH, Vue.js, Terraform, PostgreSQL, Redis, GCP, GitLab CI ### CTO — [OneRagtime](https://oneragtime.com) 2017 – 2019, Paris - Built and led the technology team (product, development, data) of a European VC platform with €150M AUM, 50+ portfolio companies, and 250+ investors. - Designed the three core products: the investor Platform, the operations Core, and the Deepdive data pipeline from web scraping to AI-driven recommendations. - Led technical due diligence on deal-flow startups, screening 4,000+ deals per year. Stack: Python, Django, Vue.js, Docker Swarm ### Telecom Architect — [Legos](https://legos.io) 2015 – 2016, Paris area - Managed critical infrastructure for the first IMS operator in France: 4G, SIP core, SMS/MMS, roaming, and fraud detection. - Platform serving 100+ operators across 110 countries: 1.2 billion minutes and 360 million SMS per year. - 24/7 on-call and incident response with a team of four; integrations with Cisco, Sonus, Red Hat, and VMware; open-source telecom stack (Kamailio, FreeSWITCH, SMPP). ### Network & Software Intern — Sovitec International 2014, Barcelona - Refactored the IT infrastructure across 5 sites and built a supply-chain planning tool covering 60+ products on 8 supply chains. ### Sales, Web & Events — Initialis 2013, Paris area - Ran the recruitment fair at Paris Expo Porte de Versailles, launched the first Initialis Serious Games, and doubled visitor numbers year on year. ## Education ### Engineer's degree in Telecommunications & MSc in Communication Networks & Services — [Télécom SudParis](https://www.telecom-sudparis.eu) 2012 – 2015 ### Preparatory classes for engineering schools (PCSI – PSI*): physics, mathematics, engineering — Lycée Henri Poincaré, Nancy 2010 – 2012 ### Machine Learning certificate — Stanford University (Coursera) 2017 ## Skills - **Leadership:** Engineering leadership, cross-functional and remote team management, hiring, technical strategy, board and investor reporting, M&A technical due diligence, teaching and mentoring - **Security:** ISO 27001/27017/27018 ISMS ownership, security questionnaires and RFP responses, pentest remediation, IAM and enterprise SSO (OIDC, SAML, SCIM), compliance automation (Vanta), Cloud Armor and Cloud IDS - **Architecture & practices:** Distributed systems, high availability, microservices, DDD and event-driven design, observability, CI/CD, database design, incident management and post-mortems, product management, UX/UI - **Engineering stack:** Go, Python, TypeScript/Node.js, React, React Native, Next.js, Vue/Nuxt, PostgreSQL, ClickHouse, Redis, Pulsar/Kafka, Kubernetes (GKE), Docker, Terraform/Terragrunt, Flux, GCP, AWS, Cloudflare, gRPC/Protobuf, OpenAPI, CircleCI, GitLab CI - **AI engineering:** LLM document-extraction pipelines (Vertex AI, Claude), multi-model fallback strategies, agentic developer tooling (Claude Code plugins, MCP servers) - **Telecom:** SIP, IMS, VoIP, WebRTC, SS7/SIGTRAN, Diameter, GTP, SMS/SMPP, Kamailio, FreeSWITCH, MVNO platforms ## Languages - French: Native - Spanish: Bilingual - English: Full professional proficiency - Catalan: Elementary - Italian: Elementary