Job Offers at T.O.N Corporate Services – Apply Now

About the job

• We’re looking for an Infrastructure Support Manager to maintain, optimize, and scale our core voice infrastructure and networks. This includes managing VoIP systems such as FreeSWITCH, OpenSIPS, and Kamailio, handling SIP trunk configurations, and ensuring backend stability for reliable, high-quality calls.
• The ideal candidate is not only a hands-on engineer but also a strong collaborator who thrives on solving complex infrastructure problems, improving uptime, and ensuring performance. If that sounds like you, we’d love to meet you.

Key Responsibilities

Infrastructure Reliability & VoIP System Support

• Maintain, monitor, and optimize FreeSWITCH, OpenSIPS, Kamailio, and other core VoIP infrastructure
• Troubleshoot and resolve SIP trunk issues to ensure consistent, high-quality voice service
• Build and maintain secure, scalable SIP server configurations (IVRs, routing rules, extensions, call queues)

Collaboration & Support

• Interface with customers and internal teams to resolve VoIP- and network-related issues
• Support Product and Engineering teams with voice infrastructure needs and implementations
• Collaborate with Operations and Growth teams on CRM and call center tool integrations

Network Performance & Security

• Ensure network configurations (firewalls, NAT, QoS) support optimal VoIP performance
• Diagnose call quality issues using tools like Wireshark, RTCP, and SIP debugging utilities
• Implement secure call handling through SIP authentication, encryption, and compliance standards

Documentation & Optimization

• Keep infrastructure documentation up to date and accessible
• Implement best practices for upgrades, patch management, and performance tuning
• Contribute to cost-effective international routing strategies and billing systems

Key Success Metrics

• Your performance will be measured by:
• Issue Resolution Time – Reduction in VoIP and network troubleshooting time
• Uptime & Availability – Maintaining >99.9% availability for all voice infrastructure
• Process & Documentation – Ensuring infrastructure documentation is always current and clear

Qualifications & Experience

• 4+ years of experience with VoIP technologies (FreeSWITCH, OpenSIPS, Kamailio, Asterisk, etc.)
• Proven expertise in SIP trunking, PBX systems, call routing, and SIP protocol handling
• Strong networking knowledge: TCP/IP, NAT, VPN, QoS, firewalls
• Experience with tools like Wireshark, RTCP, and SIP command-line debugging tools
• Scripting and automation experience is a strong plus
• Familiarity with VoIP integrations with CRM and call center tools (e.g., Salesforce, HubSpot)
• Strong skills in documentation, incident management, and cross-functional communication

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Job Description

• We’re looking for a QA Software Engineer who is passionate about quality and automation. Your role will be to ensure every release is stable, secure, and user-friendly. You’ll work closely with software engineers and product managers to define test strategies, write automated tests, and identify bugs before they reach our users. If you have a sharp eye for detail and enjoy thinking through every possible scenario, this role is made for you.

Key Responsibilities

Testing & Quality Assurance

• Develop and execute comprehensive test plans for new features, enhancements, and bug fixes
• Perform manual and automated testing across web and mobile platforms
• Identify, document, and track bugs and inconsistencies

Automation & Process Improvement

• Write and maintain automated test scripts for critical user flows
• Suggest improvements to QA processes and tools to ensure faster, more reliable testing

Collaboration & Communication

• Collaborate with developers during sprint planning and code reviews to ensure adequate test coverage
• Work closely with the Product team to clarify requirements and edge cases
• Communicate testing outcomes and risks clearly and promptly

Performance & Regression Testing

• Conduct performance, stress, and regression testing for major releases
• Ensure backward compatibility and consistent performance across updates

Product Knowledge & Customer Experience

• Understand the customer journey and anticipate common issues
• Test with empathy to simulate real-world usage and user behavior

Key Success Metrics

Your performance will be measured by:

• Bug Detection Rate – Percentage of critical issues caught before production
• Test Coverage – Breadth of manual and automated test scenarios
• Release Quality – Reduction in post-release bugs and customer-reported issues
• Deployment Velocity – Impact of QA on faster, safer releases

Qualifications & Experience

• 3+ years of experience in QA Engineering, preferably in a fast-paced tech environment
• Strong experience with automated testing tools and frameworks — especially Playwright and Pytest
• Familiarity with API testing, mobile testing, and cross-browser compatibility
• Ability to write clear bug reports and detailed documentation
• Experience with CI/CD pipelines and release management practices
• Exposure to frontend frameworks like Vue.js and Django/Python
• Strong attention to detail, analytical skills, and a user-first mindset