segron logo

Streamlining Test Automation with eSIM Technology

In the fast-paced world of telecommunications and testing, SEGRON is committed to ensuring that we are always at the cutting edge of technology. That is why eSIM support plays a significant role in the field of test automation to simulate various subscriber profiles in many different test locations.

Bridging the Gap: The eSIM Revolution

The Shift from Physical SIMs to eSIMs

Traditionally, testing relied on physical SIM cards, but their limitations were all too familiar. They are costly to procure, maintain, and susceptible to hardware failures, leading to testing downtime. This is where eSIMs, or embedded SIMs, come into play. eSIMs eliminate the need for physical cards. Instead, they depend on digital profiles that can be effortlessly downloaded onto your testing devices. This transition presents a multitude of advantages, notably in cost-efficiency.

A major advantage of the eSIM over the conventional SIM card is the ability to change the SIM profile – especially the operator contract – remotely without having to change the eSIM itself. This is extremely important for the testing with different subscriber profiles as device manufacturers or communication service providers can store several operator profiles on a device and switch between them remotely – even if only one profile can be used at a time.

The Motivation Behind eSIM Integration

What motivates this transition is not just a simple change in SIM cards. It is a comprehensive shift in how connectivity is managed. Here is why this shift is a game-changer for our customers:

- Local eSIM Multiplexing

Our local eSIM multiplexing approach empowers our customers to take control of eSIM profiles stored in the eSIM chip on a device. The activation of the desired eSIM profile is controlled by the test cases.

On Android devices we can switch between 6 eSIM profiles, and on iOS ones between 8. The eSIM profiles stay on the device and are activated and deactived per test, hence we talk about local eSIM multiplexing.

- Central eSIM Multiplexing

With our central eSIM multiplexing approach we enable the switch of eSIM profiles between different devices. The SM-DP+ Platforms are building the Basis for that as they allow the download of an eSIM profile on a dedicated device per test. Once finished the eSIM is released and can easily be migrated to another smartphone anytime in a very short time. The eSIM profile migration to another smartphone is fast, efficient, and without the need for rebooting. This method streamlines the SIM Multiplexing setup, making it more agile, adaptable, and secure.


The transition to eSIMs reduces hardware costs significantly. Unlike physical SIM cards that require managing multiple cards for various devices, eSIMs enable you to streamline your testing setup using a single digital profile that can be deployed across multiple devices. This results in substantial savings in both capital expenditure (CAPEX) and operational costs (OPEX) as expensive and complex hardware like a SIM Array is not needed anymore or a large number of mobile devices (device farm) can be reduced to a handful of devices without affecting testing capabilities.

creased Reliability

Hardware failures can be a headache for testers. Physical SIM cards are prone to such failures, disrupting testing processes and causing delays. With eSIMs, the risk of hardware-related issues is minimized, as there are no physical components to fail. This means enhanced reliability and uninterrupted testing.


One of the standout advantages of eSIMs is their versatility. With eSIMs, communication service providers can test a wide range of devices using a single eSIM profile. This adaptability streamlines the testing process, allowing them to cover more ground with fewer resources. Whether testing on smartphones or IoT (Internet of Things) devices is required, eSIMs offer a seamless solution for all possible testing requirements.

The Promise of the Future: GSMA Intelligence Report

The future of eSIMs in general is incredibly promising. According to the latest GSMA Intelligence report, a staggering 98% of operators plan to offer eSIM services by 2025. This indicates a massive shift toward widespread eSIM adoption, which will undoubtedly reshape the way we interact with mobile devices.

In conclusion, eSIM technology represents more than just a change in physical cards. It is about revolutionizing how connectivity is managed in the world of telecommunication and in consequence also test automation. SEGRON provides advanced solutions that empower our customers to embrace eSIM technology which helps them to transform the testing processes for the better.
If you are eager to explore how eSIM multiplexing can benefit your organization, please get in touch with our team. Stay tuned for more updates and insights from SEGRON on our LinkedIn page.


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