Romain Untereiner

• 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

• 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

• 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.

• 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-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

• 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

• 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).

• Refactored the IT infrastructure across 5 sites and built a supply-chain planning tool covering 60+ products on 8 supply chains.

• Ran the recruitment fair at Paris Expo Porte de Versailles, launched the first Initialis Serious Games, and doubled visitor numbers year on year.