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T Hub - Senior VoIP (IMS) DevOps Engineer
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Offer summary

(Summary generated by AI based on the full job description)

The project focuses on VoIP and IMS systems in telecommunications with emphasis on AI Calling and real-time speech processing. Technologies include Kubernetes, Python, Terraform, GitLab CI and monitoring tools like Prometheus, Grafana, ELK. Responsibilities cover analyzing and designing systems, developing and automating cloud-native components testing, operating Kubernetes platforms, automating CI/CD pipelines, and participating in critical systems on-call duties.

T Hub - Senior VoIP (IMS) DevOps Engineer

Company: T-Mobile

from: 3 July 2026
to: 2 August 2026
salary not specifiedcontract of employment (full-time)
Offer parameters
level:senior
working mode:remote • hybrid
Warszawa, Mokotów
Warszawa, MokotówMarynarska 12View on map

Requirements

Expected technologies

IMS-MRF
OneiDNS
VoIP Support Systems
GitLab
CI
Artifactory
Terraform
AWX
FluxCD
Python
Bash
Prometheus
Grafana
ELK
Jira
Confluence

Our requirements

  • Detailed VoIP know-how (SIP, SDP, (s)RTP, Diameter, IMS, able to explain call-flows on protocol level)
  • Containers & Cloud: Kubernetes (kubectl, Helm), VMware
  • CI/CD: GitLab CI, Artifactory
  • Automation: Terraform, AWX, FluxCD
  • Programming / Scripting: Python, Bash
  • Observability: Prometheus, Grafana, ELK
  • IMS & VoIP: SIP & Media debugging (Wireshark, sngrep)
  • Agile tools: Jira, Confluence
  • Systems You Will Work With
  • IMS-MRF (Media Resource Function) deployed on Kubernetes
  • OneiDNS – a cloud‑native DNS service for IMS nodes in fixed and mobile networks
  • VoIP Support Systems within the IMS fixed network provisioning chain

Your responsibilities

  • We are looking for Voice Over IP Team Members to join an International Team of experts!
  • You will be located in Poland and work as part of International Team of Deutsche Telekom, which serves millions of customers and delivers services across the Globe. As a voice expert you will have the following responsibilities:
  • Analyze and design functional and technical requirements for Voice & Messaging systems, platforms, and AI services
  • Develop, maintain, and automate testing for cloud‑native IMS components
  • Operate and improve Kubernetes‑based telco platforms in a DevOps setup
  • Support and automate CI/CD pipelines to ensure high quality and fast delivery
  • Perform structured troubleshooting and root cause analysis
  • Participate in on‑call duty and call‑out procedures for critical systems
  • Actively contribute to the development of a new AI Calling system, enabling real‑time speech processing and translation within IMS call flows
Company

What we offer

Working at T Hub will offer you an unique and highly rewarding experience on IT market. As a leader in the telecommunications industry, we do not only provide a platform to hone your technical skills but also empower you to be a catalyst for innovation.
You'll have the opportunity to work at the forefront of modern technologies, from 5G to IoT and AI, shaping the future of connectivity.

Benefits

  • sharing the costs of sports activities
  • private medical care
  • sharing the costs of foreign language classes
  • sharing the costs of professional training & courses
  • life insurance
  • flexible working time
  • corporate products and services at discounted prices
  • integration events
  • mobile phone available for private use
  • no dress code
  • parking space for employees
  • extra social benefits
  • sharing the costs of tickets to the movies, theater
  • holiday funds
  • birthday celebration
  • sharing the costs of a streaming platform subscription
  • employee referral program
  • charity initiatives
  • extra leave
  • Benefit Platform

Recruitment stages

  • 1.
    Let’s meet to better understand each other's expectations.
  • 2.
    Hiring Manager will receive your application after meeting.
  • 3.
    Technical meetings with the Hiring Manager and/or team.
  • 4.
    Time to decide!

T-Mobile

Working at T-Mobile’s T Hub will offer you an unique and highly rewarding experience on IT market. As a leader in the telecommunications industry, T-Mobile not only provides a platform to hone your technical skills but also empowers you to be a catalyst for innovation. You'll have the opportunity to work at the forefront of cutting-edge technologies, from 5G to IoT and AI, shaping the future of connectivity. Our commitment to fostering a diverse and inclusive workplace means you'll collaborate with a wide range of talented professionals, learning and growing together. T-Mobile encourages a culture of continuous learning and development, offering mentorship and support to help you thrive in your career.

This is how we work

T Hub - Senior VoIP (IMS) DevOps Engineer
I apply to:
T-Mobile
Warszawa, Mokotów
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