Job Summary

Role Category

Technical Lead for enterprise telephony solutions, including TOIP, Teams Phone, Direct Routing, SBC, SIP trunks and associated services integrated with Microsoft 365.

Activities Performed

- Design the technical architecture for Teams and TOIP telephony solutions.
- Build, maintain and evolve the product technical roadmap.
- Ensure performance, quality, resilience and service availability.
- Drive monitoring, automation and industrialization for telephony services.
- Supervise SBCs, SIP trunks, numbering plans and Direct Routing.
- Handle integration, deployment, operations and level 3 support.
- Ensure QoS, media quality, reporting, security and compliance across the voice landscape.
- Work with Product Owner, network, Teams, Exchange, cybersecurity and architecture teams.
- Mentor engineers and contribute to complex incident resolution and post-incident reviews.

Deliverables

- Telephony technical roadmap.
- Detailed architecture and technical documentation.
- Test and technical validation plans.
- Automation and industrialization scripts.
- Telephony KPIs covering QoS, media quality and availability.
- Post-incident reports and improvement plans.

Requirements

Mandatory Skills / Required Competencies

- Advanced TOIP, SIP, RTP and QoS knowledge
- Microsoft Teams Phone expertise
- Direct Routing, SBC and SIP trunk administration
- Call plans and numbering policies
- Teams / SBC / operator interoperability
- Network knowledge: VoIP, routing, NAT, firewall and traffic prioritization
- PowerShell,



JSON and telephony automation scripting
- Monitoring of SBC, Teams QoS and SIP services
- Complex voice incident troubleshooting using SBC logs, SIP traces and Teams diagnostics
- Telephony security: encryption, certificates, SBC hardening and anti-fraud controls

Preferred Skills / Exposure

- Advanced SBC manufacturer knowledge: Audiocodes, Oracle, Ribbon or equivalent
- On-premise or hybrid VOIP exposure: Cisco CUCM, Avaya, Alcatel-Lucent, Mitel or equivalent
- Python, Teams Calling APIs and advanced automation tooling
- Data and observability: Power BI, KQL, custom QoS dashboards
- Advanced VoIP protocols: SRTP, ICE, STUN/TURN, DSCP
- Technical project coordination in multi-squad or multi-provider environments
- Agile product contribution and ITIL process knowledge
- FinOps or cost optimization awareness for Teams Phone, SBC and SIP operators

Application Landscape / Environment

- Enterprise telephony and unified communications
- Microsoft 365 ecosystem with Teams Phone
- TOIP, Direct Routing, SBC, SIP trunks, numbering plans and operators
- Network, Exchange, cybersecurity and architecture interfaces

Mode of Intervention / Experience

- Senior technical lead profile for global enterprise telephony services, with solid architecture, operations and incident-management expertise.

Key Responsibilities

Pl refer above

Skill Requirements

Pl refer above

Must Have Skill

Telecom: IVR/Telephony Support/hardware & networking

Good to Have Skill

Other Requirements

Pl refer above

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