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[TSO] Application Support Engineer L3 (Telco)

Posted February 17, 2026
Full-time Mid-Senior Level

Job Overview

Project – the aim you’ll have

Our clients are the largest mobile network operators in Poland and in Europe. We deliver solutions and services that transform their networks and provide innovative services to millions of subscribers. We are looking for highly - skilled engineers to join our team and help us implement, deliver and maintain smooth operation of applications for our clients.

Position – how you’ll contribute

  • Analysis and resolution of incidents escalated from L2 Support (3rd line support)
  • Diagnosing application issues using logs, monitoring tools, and debugging techniques
  • Reproducing defects and identifying root causes (application, database, integrations, configuration, user behavior)
  • Implementing changes in subordinate systems

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