Test Engineer – Telecom
Are you passionate about telecom networks and advanced lab testing? Do you have strong expertise in 3GPP protocols, RAN testing, and troubleshooting complex network scenarios? At Knowit Connectivity, we are looking for a skilled Test Engineer to join our team and contribute to the validation of cutting-edge LTE and 5G solutions.
The Role
As a Test Engineer, you will be deeply involved in lab setup, integration, and testing – the foundation of this role. You will work with both real and simulated environments to validate network performance, troubleshoot issues, and ensure high-quality delivery for our clients. Every aspect of your work will be tied to building, maintaining, and executing tests in state-of-the-art telecom labs.
Key Responsibilities
Perform end-to-end RAN testing for LTE/5G networks, including functional, performance, and stability validation
Configure, monitor, and control UEs and network nodes, including log analysis and troubleshooting
Work with single-server gNodeB deployments and ensure integration with surrounding network components
Execute protocol-level testing and analyze L1, L2, and L3 signaling according to 3GPP specifications
Participate in lab setup, integration, and testing using both real and simulated environments (core responsibility of the role)
Develop and execute test cases for carrier acceptance, feature validation, and network performance
Apply troubleshooting and problem-solving skills to complex lab and test issues
Required Skills & Expertise
Telecom Protocols: Deep knowledge of 3GPP protocols and LTE/5G NR stack; strong hands-on experience with L1, L2, and L3 signaling; understanding of ENI design
RAN Testing: E2E RAN traffic testing expertise, including RAN configuration, UE control, RF troubleshooting, and log analysis
UE Simulation Tools: Hands-on experience with Viavi TM500/E500, FsUE, LTE Sim, UCTool, and other UE simulation platforms
Network & Debug Tools: Proficiency in C2RS, QXDM, Moshell, ICA, TGF, Ixia, Vector Spectrum Analyzer, Signal Generator, and similar tools
Deployment & Platforms: Knowledge of single-server gNodeB deployment, RHOSP, and CNIS for network integration and testing
Automation & Analysis: Experience with test automation frameworks; strong ability to debug, analyze, and report results efficiently
Who You Are
You are a detail-oriented engineer who thrives in technically challenging environments. You are motivated by problem-solving, curious about new technologies, and capable of turning complex testing scenarios into actionable insights. A background with several years in telecom lab environments is highly valued.
What We Offer
At Knowit Connectivity, you’ll be part of a forward-thinking team that combines deep technical expertise with a collaborative culture. We value innovation, knowledge sharing, and the drive to build future-ready networks. We offer:
An environment where you can grow and develop your skills
The opportunity to work with leading-edge telecom technologies
Flexible working arrangements and a healthy work–life balance
A supportive and knowledgeable team that values both personal and professional growth
Interested?
We are excited to hear from you! Apply today and join our team at Knowit Connectivity to help shape the networks of tomorrow.
- Areas of expertise
- Embedded Software Engineering
- Platser
- Stockholm

Om Knowit Sweden
Curious to learn more about Knowit? Vistit www.knowit.se <3
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