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The Rise of Travel eSIMs: SEGRON’s Role in Ensuring Seamless Connectivity

The digital landscape is continuously evolving, and eSIMs are at the forefront of this transformation. These embedded SIMs (eSIMs) allow remote provisioning of subscribers without needing a physical card and are already widely used in IoT and M2M scenarios.

With the anticipated advent of new devices like the iPhone 16 as an eSIM-only device, the popularity and demand for eSIM technology are growing in the consumer segment. The first real use case appears to be the roaming market, where travel eSIM providers are emerging and revolutionizing how we stay connected while traveling. This shift presents both opportunities and challenges for connectivity providers and travelers alike.

eSIMs: The Future of Travel Connectivity

Travel eSIMs are gaining traction among international travelers who seek cost-effective connectivity without the hassles to buy local SIM in beforehand or upon arrival.

The high cost of traditional roaming outside Roam-Like-At-Home (RLAH) areas is the primary driving factor for travel eSIM adoption.  By 2028, it is estimated that 22% of international travelers will use travel eSIMs, reflecting a significant shift in consumer behavior towards digital-first connectivity solutions. The global eSIM market, valued at $4.8 billion in 2023, is projected to grow at a compound annual growth rate (CAGR) of 25.4% to reach $14.8 billion by 2028. (Source)

travel esim projected market growth
Projected travel eSIM market growth (2023 - 2028)

SEGRON's Global Service Enabler (GSE): A Solution for Travel eSIM Providers

As the adoption of travel eSIMs increases, so does the need for robust monitoring and quality assurance solutions. Travel eSIM providers can ensure that the agreed service quality can actually be guaranteed by the host MNO (Service Level Agreement) and can react quickly in the event of restrictions, providing appropriate arguments to remedy them as soon as possible. Longer service disruptions can be quickly verified, and downtime reports help in future negotiations. 

SEGRON, a leader in next-generation testing and monitoring solutions, offers the Global Service Enabler (GSE) to address this need. GSE verifies communication services around the globe on commercial smartphones.

Key Features of SEGRON's GSE:

  • Testing with Non-Rooted Smartphones: Ensures the integrity of testing with devices that are representative of actual consumer devices.
  • Remote Provisioning Testing: Allows for the testing of remote provisioning capabilities, ensuring that eSIM profiles can be downloaded and activated without any issues.
  • Roaming Performance: Evaluates the performance of eSIMs in various roaming scenarios, ensuring reliable connectivity for travelers.
  • Network Quality Assurance: Continuously monitors and tests network quality, providing real-time insights and diagnostics to maintain high service standards.
  • Layer 3 Capability: Offers deep packet inspection and analysis at the network layer, providing detailed insights into network performance and potential issues.

For more details, visit SEGRON’s Global Service Enabler.

The Future of Travel eSIMs

The travel eSIM market is poised for exponential growth, driven by technological advancements and changing consumer preferences. As more travelers opt for the convenience of eSIMs, providers must ensure their services are reliable and user-friendly. SEGRON’s GSE plays a crucial role in this ecosystem, enabling travel eSIM providers to deliver exceptional connectivity solutions.

In conclusion, the eSIM is here to stay. With the right tools and solutions, such as SEGRON’s GSE, providers can meet the growing demand and deliver exceptional experiences to travelers worldwide.


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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)
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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)
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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
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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)
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