I

IONOS Tech Stack

European hosting, domains, and cloud infrastructure for SMBs and enterprises

IT Services and IT Consulting Karlsruhe, Baden-Württemberg 1,001–5,000 employees Founded 1988 Public Company

IONOS operates a diversified hosting and cloud platform serving 6M+ SMBs and enterprises across 18 markets. The tech stack spans full-stack web (React, Node.js, TypeScript) and infrastructure (Kubernetes, Ceph, Linux), with active adoption of containerization (Helm, Terraform) and AWS WAF—indicating a shift toward cloud-native ops and DDoS hardening. Hiring is accelerating across engineering, security, and sales, with notable gaps in cloud transformation and legacy SAP migration, suggesting the company is racing to modernize core infrastructure while scaling upmarket.

Tech Stack 200 technologies

Core StackJavaScript TypeScript React Svelte Node.js Podman Kubernetes SAP Oracle QuickBooks Python Java GraphQL GitLab CI/CD GitHub Actions Linux Webpack HubSpot Go HTML5 CSS Git Excel REST npm Yarn Linux Kernel RDMA C Bash+170 more

AdoptingKubernetes Helm Terraform CDN AWS WAF

ReplacingSAP S/4HANA SAP R/3

What IONOS Is Building

◆Challenges

Identifying security gaps
Scaling performance
Building enterprise sales capability
Cloud transformation
Security risk management across corporate group
Protecting infrastructure from ddos attacks
Migrating legacy sap r/3 to s/4hana
Payroll process digitization
Operational inefficiencies
Identifying market gaps

▲Active Projects

Ai agent platform
Automation of ceph deployments
Core application for agents
Ceph performance optimization
Managed kubernetes product improvement
Cloud security architecture development
Ddos-defense strategy and roadmap
Internal tool development
Test suite automation from scratch
Pricing and promotion strategy implementation

Hiring Activity

Accelerating330 roles · 150 in 30d

Department

Engineering

67

Sales

48

Support

37

Marketing

31

Security

31

Ops

24

HR

23

Finance

20

Seniority

Senior

138

Mid

67

Manager

43

Intern

25

Junior

25

Staff

6

Director

5

Lead

5

Notable leadership hires: Head of Tax, Team Lead, Digital Art Director

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About IONOS

IONOS is a public company (founded 1988, headquartered in Karlsruhe, Germany) providing a unified digital platform for SMBs: domain registration, web hosting, e-commerce, and online marketing tools. For enterprises, they offer cloud solutions with European data sovereignty compliance. The product surface spans managed Kubernetes, Ceph-backed storage, DDoS defense, and internal AI agent systems. The company operates across 1,001–5,000 employees with manufacturing, sales, and support footprints in Germany, Philippines, United States, Spain, Romania, and the United Kingdom. Current operational challenges include SAP R/3 to S/4HANA migration, cloud security architecture, and building enterprise sales motion.

HeadquartersKarlsruhe, Baden-Württemberg

Company Size1,001–5,000 employees

Founded1988

Hiring MarketsGermany, Philippines, United States, Spain, Romania, United Kingdom

Frequently Asked Questions

What tech stack does IONOS use?

Frontend: React, Svelte, TypeScript, JavaScript. Backend: Node.js, Python, Java, Go. Infrastructure: Kubernetes, Podman, Ceph, Linux, RDMA. Observability/CI: GitLab CI/CD, GitHub Actions. Currently adopting Helm, Terraform, and AWS WAF.

What is IONOS working on?

AI agent platform and core agent application; managed Kubernetes product improvements; Ceph deployment automation and performance optimization; cloud security architecture; DDoS defense strategy; test suite automation; pricing and promotion strategy for SMB and enterprise tiers.