Cellular RAN Test Engineer

About Lynk

Lynk is the inventor of satellite direct to device or D2D technology and has the worlds only commercial license from the FCC to operate a commercial D2D system. Today Lynk allows mobile network operators subscribers to send and receive text messages to and from space via standard unmodified mobile devices. Lynks service has been tested and proven on all seven continents has regulatory approvals in more than 30 countries and is currently being deployed commercially based on more than 40 MNO commercial service contracts covering approximately 50 countries.

Our technology will enable all 8 billion people on the planet to stay connected with the existing standard phone in their pocket. Everywhere. No matter what.

By joining Lynk you will have the opportunity to directly touch the lives of billions. Your mission will be to bring mobile broadband to billions pull hundreds of millions out of poverty and save countless lives.

Job Summary

We are seeking a highly motivated organized and accountable Cellular Radio Access Network (RAN) Test Engineer to help lead the testing of the Lynk Network. In this role you will be included in the architecture design and validation of Lynks cellular network. You will work closely with the development team and the product manager to understand the product requirements and provide feedback. You will then be responsible for designing test plans procedures and scripts for verifying system requirements are met and identifying bugs.

To be successful as a test engineer you should have a strong background in engineering testing and quality assurance with a focus on cellular network technologies and standards. You should also have excellent communication problemsolving and analytical skills. You should be able to work independently and as part of a team and be able to handle multiple tasks and deadlines.

We are looking for people who:

• Enjoy working as part of a development team to verify functionality and debug potential issues.

• Are passionate about providing highly reliable connectivity to the entire world.

• Enjoy designing setting up and executing softwareintheloop and hardwareintheloop tests and simulations to verify technology functions (or concepts) and characterize the performance.

• Enjoy a challenge and have a track record of creative thinking to solve unconventional or unexpected problems.

• Proactively run manual tests as needed to validate functionality while also working to automate all test cases.

Core Responsibilities

Specific responsibilities include:

• Evaluating the performance of the cellular base station in simulation and on the target platform.

• Developing test software and drivers to support unit integration and system testing of base station software functions.

• Work as part of the telecom development team in close coordination with product management to become a resident expert on system requirements and system design.

• Leveraging your expertise of the Lynk Network design endtoend test plans procedures and scripts for verifying system requirements are met and bugs are identified.

• Ownership of testing new releases including new features and regressions.

• Ownership of system performance characterization and metrics.

• Communicate test progress results and issues to stakeholders by maintaining uptodate bug reports and performance metrics.

• Conduct and organize testing efforts and plans.

• Perform manual testing when automation doesnt yet exist (e.g. new features) and automated testing using our automated testing frameworks.

• Design and implement automated test cases using languages such as Python ROBOT etc.

• Contribute to test automation frameworks and data analysis tools.

• Leverage various tools and methods such as network analyzers traffic generators simulators emulators etc..

• Selection and/or development of software tools to support system verification.

• Identify document and report bugs and defects related to cellular network performance functionality and compatibility.

• Analyze test results and provide recommendations for improvement.

• Collaborate with the development team and the product manager to ensure quality standards and customer expectations are met.

• Debug and troubleshoot issues that arise during testing (including functional and performance testing).

• Documentation of testing plans operational procedures and results.

• Stay updated with the latest cellular network trends and technologies such as 5G LTE and IoT.

• Design development and optimization of Lynks testing procedures/policies for our ongoing test campaign for our telecommunications technology.

• Implement continuous improvements and best practices within the team and larger organization.

• Operation maintenance and calibration of test equipment.

Required Qualifications

• A Bachelors degree (or higher) in Electrical/Computer Engineering Software Engineering Computer Science Telecommunications Engineering or a related field.

• At least four years of experience integrating and testing cellular communications systems.

• Indepth understanding of the 3GPP RAN protocols and architecture including GSM LTE and/or 5G.

• Experience using network testing tools and frameworks such as QXDM Wireshark iPerf Traceroute etc.

• Proficiency with C/C Python Bash and Git.

• Proficiency with Linux Operating Systems and Docker.

• Experience developing automated test cases.

• Ability to write clear and concise test documentation and reports.

• Excellent verbal and written communication skills.

• Exceptional organizational skills and highly accountable.

• Attention to detail and quality orientation.

• Critical thinking and troubleshooting skills.

• Ability to work in a fastpaced and dynamic environment.

Optional Qualifications

• Knowledge of software defined radios (SDRs) and their implementation.

• Deep understanding of communication theory and signal processing related algorithms design (e.g. timing recovery signal estimation and detection RF impairment estimation and correction channel modeling and estimation Doppler compensation techniques).

• Familiarity with existing telecommunications software stacks (e.g. LTE 5G NR implementations).

• Proven experience leading product testing.

• Familiarity with concepts such as DevOps IaC CICD and SCM.

• Experience with infrastructure automation tools such as Gitlab Jenkins AWS Cloud Terraform Ansible Docker and Kubernetes.

Job Location

Washington DC area