Romain Untereiner

• Lead a ~10-person product and engineering team (grown from 5) on a B2B produce platform with 500k+ orders a year for retailers like Aldi, Carrefour, Kroger, E.Leclerc, and Metro; set up release train, on-call, QA gates, AI-assisted coding.
• Hands-on, ~170 merged PRs a year (Go, TypeScript/React, Terraform): Cloud Armor WAF tuned on 24M requests (zero false positives), Postgres migration runbooks and cutover, IaC modules, SFTP for EDI, NATS JetStream, offers and tenders backend.
• Technical lead on enterprise retailer integrations (workshops, API specs, ADRs, ERP exporter): a major retailer's supplier marketplace from kickoff to Phase 1 in 5 months.
• Set the direction for LLM order parsing with cross-provider fallback (team-built): AI rose from 12% to 67% of imports in a year; emails and PDFs drive ~2/3 of orders.
• CISO: ran ISO 27001/27017/27018 (two surveillance audits passed) and security reviews; specified and led enterprise SSO/SCIM; ran incidents, incl. a ~100× index fix.

Stack: Go, TypeScript, React, React Native, PostgreSQL, NATS, GKE, Terraform, Cloud Armor, Vertex AI, Prometheus, Sentry, 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 Q4 2023; 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: delivered work for 40+ client teams, 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.