segron logo

What Does End-to-End Testing Mean for Telecoms?

The digitization of telecommunications has led to the adoption of many software testing methodologies, including end-to-end (E2E) testing. Sometimes confused with system testing, E2E testing goes much farther, validating the interoperability of different network components and their complex interactions.

Telcos often treat E2E testing as a necessary evil, an expensive and labor intensive process that doesn’t always deliver clear ROI. But automating E2E testing can help overcome some of its challenges.

The Purpose of E2E Testing

The testing team already conducts thorough and thoughtful tests on individual units, systems, and integrations. So you’d think that everything would interact as designed, right? Not always.

Sometimes there are “communication breakdowns” between different network components, which must seamlessly share command and data information. These timing and content issues often emerge only in the context of E2E testing. Essentially, E2E testing ensures that the whole network ecosystem works as more than simply the sum of its parts.

E2E testing should focus on real-user scenarios and validate a system and its individual components for not only integration, but also data integrity. When executed well, E2E testing detects issues with components, subsystems, and workflows, contributing to increased efficiency and reliability of the entire system.

Challenges of E2E Testing

E2E testing requires complex test scenario planning. In a perfect world, the test team would have a comprehensive, detailed list of conditions for every single user function. But in reality, the time and resources required for manual testing usually mean that E2E testing can only be completed for some user stories.

Since other tests should catch many critical issues, this selective E2E testing can be adequate. However, more complete E2E testing is naturally preferable. Automation of E2E testing can help telcos attain a more thorough, rigorous E2E testing protocol, along with reducing the costs associated with manual E2E testing. However, automation can present its own set of challenges:

  • Scalability: E2E testing protocols will continue to become more complex in the coming years. And every change to a mission-critical system means that the E2E test must be updated and documented. While this increased demand makes automation absolutely critical, tests much also be run in parallel, demanding more resources.
  • Coordination: Workflows for E2E tests must be scheduled in the same sequence they would be executed in the real world. The intricate interdependencies of all these systems can be difficult to manage across diverse testing scenarios. 
  • Accessibility: E2E tests run across entire systems in a pre-production environment, and often each system is administered by a different team. Once tests are automated, individual testers lose the ability to improvise in the case of exceptions, because they can’t access the E2E test itself.

Best Practices in E2E Testing Automation 

These challenges shouldn’t deter telcos from automating E2E testing; the potential benefits far outweigh these challenges. Following best practices can help maximize the advantages of automated E2E testing.

  • Put end users first. Design E2E tests with user stories, acceptance tests, and behavior-driven design (BDD) in mind. This approach helps to keep the focus on features, rather than implementation. 
  • Stick to the “happy path.” Focus on high-use cases that represent typical use-case scenarios. These are sometimes called the “happy path” or “golden path.” Limit exception testing to lower unit- or integration-level testing. 
  • Remember your risk analysis. E2E testing is expensive. Focus on features that are high-risk, that is, those that are more likely to fail and will also have significant impact on customer experience. 
  • Choose the right framework. Look for a testing automation partner that offers full access to systems under test. That access should include signaling trace and system log analysis.
  • Use a common-sense testing sequence. When you test a single application, it’s relatively easy to diagnose and fix a failure. But E2E testing looks at much more complex systems, so identifying the root cause of a failure can be much more difficult. Save E2E testing for last, after more straightforward testing has been used to address most bugs.
  • Create the ideal testing environment. Build an efficient test environment, thoroughly document its requirements, and communicate those requirements to the entire testing team. Be sure to address how to handle updates and other changes. 
  • Concentrate on the most common devices. Given the vast variety of connected devices, E2E testing on every device is basically impossible. Use the most popular iOS and Android devices for physical testing, and use simulations or emulators for less popular devices.
  • Avoid direct interaction with user interfaces (UI). Changes in UI can cause test failure. By separating your test logic from UI elements, you’ll get a more stable test. When a test must interact with UI, be sure to set wait times just a bit longer than it should normally take for a UI element to appear. That way the test won’t fail unnecessarily due to brief UI-related delays. 
  • Account for manual testing needs. Not everything can be automated; testing usability, for example, will remain a manual task. Don’t forget to account for the cost and time associated with this manual testing. 

Interested in our Products ?

Scroll to Top
Segron logo black blue

Senior SaaS System Administrator

Technical Skills :
  • Oversee the sysadmin related tasks in our SaaS infrastructure (partially cloud based, partially bare metal)
  • Daily operation and maintenance of the system
  • Analysing and resolving incidents
  • Follow and help improving the incident and change management procedures
  • Design procedures for system troubleshooting and maintenance
  • Incorporating base OS updates and security patches
  • Ensure that systems are safe and secure against cybersecurity threats by raising change requests where potential threat is possible
  • Performing SW updates for the Segron SaaS SW stack (distributed architecture with clusters)
  • Configuring solutions like reverse proxy, firewalls, etc.
  • Building tools to automate procedures & reduce occurrences of errors and improve customer experience
  • Tutoring & coaching newcomers & less senior experts in the team
  • Interworking with the architects and IT admins of Segron to have the SaaS procedures inline with the Segron processes
Non-technical skills:
  • We are looking for a self-motivated, self-improving individual with a highly independent mindset and open and straightforward technical communication to help us to improve and maintain our cloud infrastructure of our powerful end-to-end testing solution ATF (Automated Testing Framework)
  • 3+ years hands-on experience with operation and monitoring of cloud / linux systems
  • 3+ years of hands-on experience with network devops elements: configuring routers, switches, networks
  • Hands-on experience with running live systems with infrastructure as a code mode of operation
  • Specific knowledge which brings direct advantage: Docker, Docker Compose, Grafana, Prometheus, Ansible, Debian Linux OS administration, Security
  • Experience in building and maintaining distributed systems (incl. redundancy, resiliency, load-balancing) is welcome
  • Excellent knowledge of English
Location :
  • Place of work: Bratislava (partially home office possible)
  • Rate: from 30 EUR/hour (possible higher rate, depends on experience)
Segron logo - The Next Generation of Active Testing
Segron logo black blue

CI/CD Senior Developer

Technical Skills :
  • A senior role with a proven expertise in software development, cloud computing, DevOps, and CI/CD
  • Experience in planning, designing, and overseeing the CI/CD strategy and architecture on the level of organization
  • Ability to tailor testing strategies which define and follow the best practices, standards, and policies for the software delivery process
  • Hands-on experience in creating and managing CI/CD pipelines and workflows (PaaC)
  • Ability to evaluate and recommend the best tools, technologies, and methodologies for the CI/CD implementation
  • Prior hands-on experience working with different CI/CD toolsets (Jenkins, Bitbucket, GitLab, artifactory, Ansible ..)
  • Proficient with DevOps tools API automation capabilities
  • Proficient with Atlassian Tools (BitBucket, Jira, Confluence) and agile SW development methodologies
  • Familiar with cloud patterns and best practices
  • Familiar with web performance best practices
  • Comfortable working in cloud DevOps ecosystem
  • Comfortable working with Linux platforms
  • Initial working experience in SW development is an advantage.
Non-technical skills:
  • Effective communication with technical as well and business stakeholders
  • Self-motivating, self-improving mindset
  • Ownership of relevant industry certificates is a plus
Location :
  • Location: Bratislava, Slovakia (with hybrid flexibility)
  • Rate: from 30 EUR/hour (possible higher rate, depends on experience)
Segron logo - The Next Generation of Active Testing
Segron logo black blue

Test Automation Engineer

Job description, responsibilities:

  • ATF system configuration, integration, operations & maintenance in customer environments.
  • Building tools to automate procedures & reduce occurrences of errors and improve customer experience.
  • Hardware Verification, Testing and Preparation within the Staging Process.
  • Contribution to customer and service partner technical support across multiple accounts by sufficiently managing priorities and deadlines for own work.
  • Segron Laboratory equipment configuration and maintenance support.
  • Hardware order and logistics support.
  • Problem analysis of ATF issues, troubleshooting and fault correction.
  • Interface towards SEGRON Development Team in case of product or software issues.
  • Interface towards the SEGRON Technical Sales Team to support planned activities.
  • System and Integration documentation and guidelines.
  • Perform root cause analysis for production errors.
  • Deployment of software updates and fixes.
  • Ability to work in a team environment serving multiple global customers.
  • Willing to travel for 3-5 days onsite deployments
Requirements/ Skills:
  • Excellent knowledge of English
  • Operating Systems: Linux, Windows, MacOS
  • Good Knowledge of Containers and Virtual Machines
  • Telco experience welcome
  • Python or other scripting experience or knowledge preferable
  • Educational Qualification: Computer Science/Engineering or work experience equivalent
  • Work Experience: 3-4 years preferred


  • Full time job (employment)
  • 3 days onsite, 2 days home office
  • Offered salary: from 1800 Euro (depends on seniority and skills level)
  • Variety of financial benefits
  • Place of work: Bratislava
Segron logo - The Next Generation of Active Testing
Segron logo black blue

Senior Python Developer

Technical Skills :

  • A solid, experienced SW developer with at least 10 years of experience in active SW development in different programming paradigms
  • Minimum 5 years of professional Python development experience
  • Master or college degree from Computer Science, Mathematics or STEM domain
  • Well educated in design and programming patterns that increase software’s efficiency and readability.
  • Very good analytical and problem solving skills.
  • At least three skills out of the following 4 skills are requested:
    • Microservices based architectures (Docker containers)
    • Linux
    • Ansible
    • Robot  Framework
  • Comfortable with sysadmin and DevOps skills (Ansible, YML files, Network Programming, IP protocols, designing and developing proxy servers for different protocols – example: streaming, integrating and compiling third party libraries on Linux (Debian))
  • Proficient with Atlassian Tools (BitBucket, Jira, Confluence) thorough understanding of Git and version control best practices
  • Familiar with cloud patterns and best practices
  • Familiar with web performance best practices

Non-technical skills:

  • Ability to work under pressure
  • Ability to abstract and explain your work
  • Strong understanding of Agile development process and experience working in an agile team
  • Strong communication skills with both technical and non-technical stakeholders
Location :
  • Bratislava, Slovakia (with hybrid flexibility)
  • Rate: from 35 EUR/hour (possible higher rate, but depends on experience)
Segron logo - The Next Generation of Active Testing