1&1 Telecommunication SE Tech Stack

German telecoms operator with 16M customers and Open-RAN 5G infrastructure

Telecommunications Montabaur, Rheinland-Pfalz 1,001–5,000 employees Public Company

1&1 operates one of Germany's largest telecom networks—16 million customer contracts, 50,000+ km of fiber backbone, and a proprietary Open-RAN 5G deployment. The tech stack reveals dual operational modes: enterprise infrastructure (Active Directory, Cisco, Juniper, Check Point) supporting carrier operations, alongside modern application layers (Python, Kubernetes, Docker, AWS/Azure). Active hiring across sales, engineering, and product with a 10-person senior cohort signals parallel focus on network expansion and digital product innovation, corroborated by concurrent projects in AI customer care, campaign automation, and analytics infrastructure.

Tech Stack 58 technologies

Core StackPower BI Active Directory Confluence Python Cisco PHP MySQL Jira PyTorch TensorFlow Docker Kubernetes AWS RAG Adobe Premiere Pro ServiceNow Configuration Manager PowerShell Check Point Juniper Adobe Analytics Tealium IQ OWASP Symfony Ray Azure Adobe After Effects SOAP DAX Adobe XD+28 more

What 1&1 Telecommunication SE Is Building

◆Challenges

Optimizing b2b campaign performance
Improving b2b retention
Optimizing sales and customer value
Identifying performance deviations early
Ensuring scalability across teams
Ensuring budget transparency
Optimizing data architecture
Ensuring data consistency
Identifying performance patterns
Software and hardware updates

▲Active Projects

Develop ai security guardrails
Holistic analytics strategy for broadband customer retention
Introducing new technologies
Expanding existing it infrastructure
B2b campaign execution across push and pull channels
Control center development
Integration of new functions into digital contact and crm landscapes
End-to-end development of ai products in customer care
Integration of ai solutions into crm and process landscapes
Conversion-optimized new customer campaigns

Hiring Activity

Accelerating25 roles · 25 in 30d

Department

Sales

Engineering

Ops

Product

Data

Marketing

Security

Seniority

Senior

Mid

Lead

Manager

Junior

Intern

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About 1&1 Telecommunication SE

1&1 Telecommunication SE is Germany's fourth-largest telecom provider by customer base, operating mobile networks, broadband services, and fixed-line infrastructure. The company owns and operates over 50,000 kilometers of fiber-optic cable forming the backbone of its nationwide network, and is actively building a Open-RAN-based 5G network across Europe. With over 3,200 employees and headquarters in Montabaur, the organization serves both consumer and B2B segments. Current initiatives span AI-driven customer care systems, campaign performance optimization, broadband retention analytics, and integration of new technologies into existing CRM and contact center infrastructure.

HeadquartersMontabaur, Rheinland-Pfalz

Company Size1,001–5,000 employees

Hiring MarketsGermany

Frequently Asked Questions

What tech stack does 1&1 use?

1&1's stack spans enterprise infrastructure (Active Directory, Cisco, Juniper, Check Point), analytics (Power BI, Adobe Analytics, Tealium IQ), application frameworks (Python, PHP, Symfony), ML (PyTorch, TensorFlow, Ray), containerization (Docker, Kubernetes), cloud platforms (AWS, Azure), and service management (ServiceNow, Jira, Confluence).

How many customers does 1&1 have?

1&1 serves nearly 16 million customer contracts across mobile, broadband, and fixed-line services in Germany, making it one of the country's largest telecom operators.

How this profile is built

1&1 Telecommunication SE's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.