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Other
bachelor degree
Flexible working hours, Hybrid work environment, Training programs, Upskilling and reskilling opportunities, Internal growth and mobility, Health and well-being programs
Posted 20d ago
Apply by Oct 5
~40 hrs/week
Responsibilities
The VoIP L3 Expert is responsible for ensuring the reliability and security of global IP telephony and SIP trunking infrastructure. This role involves managing critical incidents, performing root cause analysis, and executing complex platform upgrades and migrations.
Requirements
Candidates must have at least 5 years of advanced experience in IP telephony and VoIP engineering within a telecom or managed service provider environment. A bachelor's degree in a technical field is required, along with deep expertise in SIP protocols, SBC configuration, and Microsoft UC ecosystems.
Full job description
Orange Business is here!
About us
Join us at Orange Business!
We are a network and digital integrator that understands the entire value chain of the digital world, freeing our customers to focus on the strategic initiatives that shape their business.
Every day, you will collaborate with a team dedicated to providing consistent, sustainable global solutions, no matter where our customers operate. With over 30,000 employees across Asia, the Americas, Africa, and Europe, we offer a dynamic environment to develop and perfect your skills in a field filled with exciting challenges and opportunities.
About the role
Scope:
Deliver expert-level L3 support for global VoIP platforms, carrier integrations, and associated telephony ecosystems. Acting as the last line of defense before vendor escalation, this high-impact role combines deep technical expertise with strong stakeholder engagement, covering complex incident resolution, platform upgrades, proactive service improvements, and cross-functional collaboration with operations, transition, presales, and lifecycle teams. As a VoIP L3 expert, you play a critical role in maintaining service reliability, high availability, and optimal performance for carrier-grade infrastructure, while paving the way for career growth into architecture, technical service design, or leadership roles
Job Description:
Mission
The primary mission of the VoIP L3 Expert is to ensure optimal functionality, security, and reliability of the global IP telephony and SIP trunking infrastructure, aligning with organizational goals through efficient service delivery, exceptional client support, and continuous improvement initiatives
Main activities
Ensure optimal functionality, security, and reliability of global IP telephony and SIP trunking infrastructure to support organizational objectives.
Manage advanced and critical incidents involving global SIP interconnects, carrier-grade Session Border Controllers (SBCs), and voice routing services.
Perform thorough root cause analysis for major incidents and recurring issues to establish long-term resolutions.
Lead technical recovery operations during system outages, coordinating with global teams for effective communication and rapid resolution.
Execute and validate complex change requests, platform upgrades, and telephony migration projects.
Participate in release cycles, introducing new features, SIP trunks, and routing policies.
Review, validate, and onboard new customers and services in collaboration with operational readiness teams.
Support technical design reviews and customer audits, ensuring compliance and accuracy of documentation.
Maintain and improve internal knowledge bases and operational procedures.
Contribute to knowledge transfer through training and mentoring of L1/L2 support teams.
Monitor incident trends and platform health through regular service reviews to identify improvement opportunities.
Provide technical expertise during presales activities, supporting service assurance and complex solution design.
Fulfill any additional reasonable tasks as assigned, including on-call rotation responsibilities.
About you
Key Skills, Knowledge and Abilities
Desired Professional skills:
Demonstrates extensive hands-on experience deploying, managing, and troubleshooting VoIP and IP telephony systems in carrier or CPaaS environments.
Possesses expert knowledge of SIP protocol, SDP negotiation, RTP/RTCP media handling, and global dial plans following E.164 standards.
Skilled in deploying and configuring carrier-grade Session Border Controllers including setup, routing policies, header manipulation, and security measures.
Capable of deep-dive incident analysis through SIP traces, Syslog, and packet analysis tools such as Wireshark and Homer.
Understands VoIP network edge fundamentals such as NAT traversal mechanisms including ICE, STUN, TURN, as well as TLS and SRTP security implementations.
Maintains a strong networking foundation covering TCP/IP, VLANs, VPNs, IP routing, and enforced Quality of Service (QoS) for voice traffic.
Proficient in automation and scripting languages such as Python and REST APIs to streamline telecom provisioning and reporting processes.
Experienced in root cause analysis and producing clear, well-structured technical documentation.
Effectively manages crisis communication and incident coordination to maintain service continuity.
Applies ITIL frameworks for Incident, Problem, and Change Management to align technical tasks with operational best practices.
Preferred Qualifications (Strongly Prioritized):
Extensive experience with the Microsoft UC ecosystem, specifically Teams, Phone System, and Direct Routing.
Expertise in Teams Voice components, including user provisioning, voice routing, policies, and dial plans.
Hands-on experience integrating AudioCodes SBCs with Microsoft Teams Direct Routing.
Proficiency navigating the M365 admin center for service health monitoring and troubleshooting.
Experience handling hybrid voice setups and integrating third-party/legacy PBXs (ISDN, PRI, BRI) with modern UC platforms
Additional Advantages (Nice-to-Have):
Automation & Development: Proficiency in scripting (e.g., Python, PowerShell) or utilizing REST APIs to streamline telecom provisioning, reporting, and billing.
API & Connectors: Familiarity with Webhooks, CPaaS integrations, or utilizing the Power Platform (Power Automate, Power BI) for operational reporting and automated workflows.
Interpersonal Skills:
Collaboration & Teamwork: Work effectively with distributed global teams and stakeholders to achieve common goals.
Escalation & Crisis Management: Skilled in managing crises and escalating issues effectively to ensure minimal impact.
Leadership: Mentor junior engineers, lead transversal initiatives, and drive operational synergy.
Ownership & Resilience: Take ownership of tasks and proactively drive them to completion under pressure.
Qualifications:
Education:
Bachelor’s degree in Telecommunications, Information Technology, Computer Engineering, or a related technical field.
Experience:
5+ years of advanced hands-on experience in IP telephony and VoIP engineering within a telecom, CPaaS, or Managed Service Provider environment.
You bring rigor, passion for challenges, and determination. You seek the opportunity to expand your expertise, achieve your goals, and thrive.
What we offer
• Global Opportunities: Work in multi-national teams with opportunity to collaborate with colleagues and customers from all over the world.• Flexible Work Environment: Flexible working hours and possibility to combine work from office and home (hybrid ways of working).• Professional Development: training programs and upskilling/re-skilling opportunities.• Career Growth: Internal growth and mobility opportunities within Orange.• Caring and Daring Culture: Health and well-being programs and benefits, diversity & inclusion initiatives, CSR and employee connect events.• Reward Programs: Employee Referral Program, Change Maker Awards.
Only your skills matter
Regardless of your age, gender identity, race, ethnic origin, religion/belief, sexual orientation, marital status, neuroatypia, disability, veteran status or appearance, we encourage diversity within our teams because it is a strength for the collective and a vector of innovation. Orange Group is a disabled-friendly company and equal opportunity employer: don't hesitate to tell us about your specific needs.
In a world that never stands still, possibility is everywhere. New technologies open doors every day, for our customers, for the communities we serve, and for you.
Across 65 countries, our experts bring together connectivity, cloud, cybersecurity, AI and data to turn complexity into progress. We make the ambitious possible and the complex clear, for our customers and for society.
What makes us different is our people. Diverse backgrounds, cultures and expertise come together every day to solve real problems, share knowledge and create lasting impact. We don't just deliver technology. We work side by side with our customers to bridge the gap between ambition and execution, turning "what if" into "what is.“
At Orange Business, possibility isn't something you wait for. You build it. Each of us has a role to play in that journey: learning a new skill, leading a project, making a real difference every day. Whether you're working with teams across the globe or deepening your expertise in the technologies of tomorrow, you'll find here the space to grow, take initiative, and leave your mark.
Because when people and technology move forward together, possibility becomes progress.
Possibility starts with tech you trust. Orange Business is here.
Offices: La Plaine Saint Denis, Paris, 93457 Cedex, FR · 217 Bath Rd SL1 4AA Slough, Slough, Berkshire SL1 4AA, GB · Якиманская наб., д. 4 стр. 1, Moscow, 115487, RU · 100 Galleria Parkway, Atlanta, GA 30339, US · #04-02 TechnoPark@Chai Chee, Singapore, 469000, SG
telecommunicationsmobilityvideoconferencingnetworkingcloud computingsecurityunified communicationsand machine-to-machineBusiness Information SystemsInformation Technology
How many Software jobs are open in Cairo, Egypt right now?
There are currently 792 open software positions in Cairo, Egypt listed on Clera. New openings are added daily as companies post roles.
Which companies are hiring for Software roles in Cairo, Egypt?
Companies currently hiring include Orange Business, PwC, Capgemini, Accenture, Scale Army Careers, among others. Browse the listings above to see every active employer.
Are there remote or hybrid Software jobs in Cairo, Egypt?
Yes — 324 of the 792 open software positions offer remote or hybrid work (104 remote, 220 hybrid).
How do I apply for Software jobs in Cairo, Egypt?
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.