Integration Expert for Enterprise Core Services

T-Systems is part of the Deutsche Telekom Group, with around 30.000 employees worldwide. We create technology with purpose to generate a positive impact on society. We are looking for curious talent, eager to learn, take on challenges, and contribute ideas that transform our customers’ experience.

We trust people: we offer autonomy, continuous support, and a collaborative environment where you can grow without limits. We are one global team, guided by respect, integrity, and a passion for doing better every day.

Job Description

Project description

At the Telco Hub in Madrid, we are pioneers in merging IT and Telco, building and scaling Telco as a Platform (TaaP) on our proprietary layered cloud. Our teams operate in cross-country and cross-functional squads, delivering cutting-edge services to Europe´s most valued Operator.

Our mission is to create the best customer experience based on three core principles:

✅ Cloud-based – Harnessing the latest technologies for scalability and performance.

✅ Automated – Driving efficiency through AI, automation, and DevOps.

✅ Sustainable – Building a future-ready, environmentally conscious infrastructure.

We are looking for top engineering talent eager to grow technically and professionally in an innovative, dynamic, and collaborative environment. If you are passionate about shaping the future of telecommunications, this is your place!

The Data Tribe (T-DAT) within the Services & Platforms (T-SP) division bears holistic responsibility for all data services in the fixed and mobile networks throughout their entire lifecycle. The Packet Core Supersquad/Enterprise Core Squad is responsible for our business customer services in our mobile core networks. In this position, you will integrate and test all necessary developments and adaptations to realize new customer and business requirements in our development labs and in our state-of-the-art cloud native 4G and 5G core networks.

Responsibilities and Duties

Install and integrate all new developments, adaptations and configuration changes to implement new customer requirements in our mobile core network test laboratory

Use CI/CD-pipelines and test automation environments

Test and verify that all requirements are met correctly and completely

In case of failure, conduct root cause analyses, secure evidence and initiate corrections

Programming and automating test cases

Improve implementations to optimize customer experience, reliability and efficiency

Contribute to the design and implementation of automated CI/CD pipelines and test automation for cloud-native applications

Verify and improve high availability solutions and disaster recovery plans to ensure service stability and rapid recovery

Provide support for complex projects across development, quality assurance, and project planning, as well as assist with the implementation of new mobile core software releases

Collaborate closely with involved implementation teams to streamline processes, enhance software and system performance and apply innovative technologies and concepts

Qualifications

Must-have requirements:

In-depth understanding of mobile core network components, including their functions, procedures and processes, interfaces, and protocols in 4G enhanced packet core (4G ePC), 5G non-standalone core (5G NSA), and 5G standalone core (5G SA) networks and their interconnection with customer networks.

Several years of experience in integrating and testing of mobile services and CNF applications (ideally Mavenir products) in cloud-native environments.

Several years of experience in applying and programming test automation in cloud-native environments.

Good knowledge of tracing and protocol analysis in microservice architectures with REST APIs and modern security protocols in cloud-native environments.

Deep end-to-end understanding of the functionality and protocols of heterogeneous IPv4/IPv6