Calsoft - Senior Quality Assurance Engineer - 4G/5G

Location : Pune

Employment Type : Full-time

Experience Level : 4-8 years

Notice Period : Immediate- 30 Days

SQA engineer for Embedded Software SQA of AirLink Routers.

QA : Telecom Networking & Protocol Validation Quality Assurance Engineer (4+ Years) for Cellular Routers & Gateways Mandatory Skills : Deriving and executing test cases from (BDD) test strategy and domain experience

1. Expertise in Networking Protocols : Strong hands-on QA experience with TCP/IP, DHCP, DNS, BGP, and in-depth understanding of Wifi, 4G/5G cellular network behavior.

2. Infrastructure & Security Validation : Proven capability in testing VLAN, LAN/WAN configurations, captive portals, and applying iptables/NFT-based network filtering rules.

3. End-to-End Functional & Regression Testing : Experience in comprehensive validation of router features across varying network configurations, including VPN (OpenVPN) and protocol-level regression cycles.

4. Network Troubleshooting & Analysis : Advanced skills in diagnosing network behavior, analyzing protocol flows, and ensuring QA coverage across system-level telecom functionalities.

Job Summary :

We are seeking a dedicated Software Quality Assurance Engineer to ensure the quality and reliability of high-performance cellular routers and gateways. In this role, you will design and execute comprehensive test strategies for embedded systems running on Linux and RTOS platforms, validate wireless connectivity features (4G/5G, Wi-Fi, Bluetooth), and test user interfaces for router management. You'll collaborate with development teams to identify issues early and ensure world-class product quality. This is an excellent opportunity to advance your QA expertise in embedded systems and wireless networking while contributing to mission-critical networking solutions.

Responsibilities :

- Design, develop, and execute test plans and test cases for embedded software systems in cellular routers, focusing on functionality, performance, and reliability (35%).

- Perform comprehensive testing of wireless connectivity features (4G/5G, Wi-Fi, Bluetooth) and network protocols across different environments and configurations (25%).

- Test web-based user interfaces for router configuration, monitoring, and management functionality, ensuring usability and cross-platform compatibility (20%). - Collaborate with development teams to identify, document, and track defects through resolution, and participate in root cause analysis (15%).

- Maintain and enhance automated test frameworks and contribute to continuous integration and testing processes (5%).

Minimum Qualifications :

- Bachelor's degree in Computer Science, Electronics, Electrical Engineering, or related field.

- 4+ years of experience in software quality assurance, testing, or related technical role.

- Strong understanding of software testing methodologies, test case design, and defect management processes.

- Experience with testing embedded systems, networking equipment, or hardware-software integrated products.

- Knowledge of networking protocols (TCP/IP, HTTP/HTTPS) and wireless technologies testing.

- Familiarity with Linux environments and command-line tools for testing and debugging.

- Experience with test management tools, bug tracking systems, and version control.

- Strong analytical and problem-solving skills with attention to detail. Desired Qualifications :

- Experience testing cellular technologies (4G/5G), modem functionality, or wireless communication systems.

- Knowledge of network security testing (VPNs, encryption, authentication protocols).

- Experience with automated testing frameworks, scripting languages (Python, Shell), and CI/CD pipelines.

- Familiarity with performance testing, load testing, and stress testing methodologies.

- Understanding of web application testing, API testing, and UI/UX validation.

- Experience with test automation tools (Selenium, Postman, or similar) and network testing equipment.

- Knowledge of RTOS environments, embedded system debugging, and hardware-in-the-loop testing.

- Experience with agile development methodologies and cross-functional team collaboration.

- Understanding of regulatory compliance testing and certification processes for networking equipment.

- Strong communication skills and ability to work effectively with development teams.