Test Engineer, 100% in Zug Zug, Switzerland

Telecom26; Zug; Remote; CHF 90,000 - 120,000; Full time

Job summary

Telecom26 AG is seeking a Test Engineer to join our team in Switzerland. You will design, automate and run tests across our platform, covering backend services, APIs and the SIM Portal web application, with end-to-end testing of mobile telecom functions.

4+ years of relevant experience in quality engineering is required. We value test automation, API validation, and proactive defect reporting, plus hands-on experience with RESTful and gRPC services, SQL databases, and UI automation tools.

Qualifications

• 4+ years of relevant testing experience in distributed systems.
• Strong QA background with focus on automation and reliability.
• Experience testing APIs, backend services and UI is preferred.

Responsibilities

• Design test strategies, plans and cases for complex systems.
• Build and maintain automated test suites (functional, integration, regression, end-to-end).
• Test APIs and backend services, validate end-to-end data flows.
• Report defects clearly and collaborate with developers to reproduce and fix.

Skills

REST APIs testing

Automation frameworks

CI/CD

SQL (PostgreSQL)

UI test automation

Tools

Playwright

Cypress

Selenium

Docker

Git

Jira

Confluence

Job description

Telecom26 delivers mobile services built for a borderless world. Our culture emphasizes innovation, collaboration, and rewards success. We strive for diversity and encourage each other to solve problems in creative ways, take on new responsibilities, extend our experiences and turn the impossible into possible. Our commitment to you is that we will grow together.

Telecom26 has an immediate need for a Test Engineer to join our world-class team.

Key responsibilities:

We are looking for a Test Engineer to help our engineering team deliver reliable mobile telecom provisioning, data-processing, and analytic services. You will work closely with our developers to design, automate and run tests across our platform, from backend services and APIs to the SIM Portal web application. The role also covers end-to-end testing of mobile network functionality and our BSS (provisioning, rating, charging and billing) systems, so hands‑on experience in the mobile telecom domain is a strong advantage.

Candidates should have 4+ years of relevant experience.

Technical Skills:

Candidates should have deep understanding / extensive experience in the general quality engineering areas of:

• Designing test strategies, test plans and test cases for complex, distributed systems
• Building and maintaining automated test suites (functional, integration, regression and end‑to‑end)
• Testing APIs and backend services, including validating data flows end to end.
• Reporting defects clearly and working with developers to reproduce, triage and resolve them

Candidates should have significant experience with the following technologies / in these technical areas:

• Testing RESTful APIs and gRPC services
• SQL and relational databases (PostgreSQL) for test data setup and result validation
• UI test automation for web applications (e.g. Playwright, Cypress or Selenium)

Candidates should have experience with:

• Integrating automated tests into CI/CD pipelines
• Docker and containerized test environments
• Source control (git), collaboration tools (e.g. Jira, Confluence)

Preference given to candidates who have:

• Experience in mobile telecom: SIM/eSIM lifecycle, subscriber provisioning, roaming, voice/SMS/data services, or core network elements (HLR/HSS, PCRF, Diameter)
• Experience testing BSS systems such as rating, charging, billing, CDR processing or order management
• Field or device testing on mobile handsets and networks
• Experience testing OAuth/OIDC authentication flows
• Performance and load testing experience (e.g. Locust, k6)
• Listed examples of open-source work (e.g. github accounts)

Personality/Character:

We are looking for candidates with:

• Ability to work in a multicultural environment
• Must be organized and won't stop until the job is "solved forever"
• Attitude and aptitude are key. These traits trump all others