VoIP Engineer

October 30

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Tabby

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Fintech • eCommerce

Tabby is a payment solutions company that allows shoppers to split their purchases into four interest-free monthly payments, making shopping more accessible and convenient. Tabby provides an app that helps users discover and track the best products, brands, and deals. The service is available for a wide range of categories, including fashion, beauty, electronics, and more, and integrates with VISA for broad acceptance. Additionally, Tabby offers business solutions to increase sales by removing price barriers and supports shoppers through its Tabby Care service, which facilitates easy returns and payment holds in case of purchase issues.

201 - 500 employees

💳 Fintech

🛍️ eCommerce

💰 $58M Series C on 2023-01

📋 Description

• VoIP Architecture & Operations: Design, deploy, and maintain enterprise-grade VoIP systems (Genesys Cloud CX1 – BYOC Cloud/Edge, Asterisk, ZIWO, GSM gateways such as Dinstar/Yeastar/UC2000). • Carrier Integration: Manage interconnections with regional telecom operators (Etisalat, du, STC, others), covering testing, deployment, and troubleshooting complex scenarios. • Protocol Mastery: Deep SIP/RTP/SRTP work – advanced SIP header tuning (From, Contact, Diversion, P-Asserted-Identity), NAT traversal, SDP analysis, early media, re-INVITEs, and timeout handling. • Advanced Troubleshooting: Act as L3 escalation point; analyze packet captures (Wireshark/tshark) to resolve one-way audio, packet loss, jitter, and media quality issues. • Automation & Scripting: Develop utilities and scripts (Bash/Python) for monitoring, CDR exports, log handling, and process automation. • High Availability & DR: Design clustering, trunk redundancy, and disaster recovery for voice infrastructure. • Vendor & Regulator Interaction: Open and drive vendor support cases, negotiate with carriers, and work with regulators (TRA UAE, CITC KSA) to meet compliance requirements. • Data Center Work: Perform safe physical interventions (installing, switching, replacing modules/servers) and plan preventive maintenance. • Service Ownership: Participate in on-call rotations, taking ownership of VoIP services and providing critical support during incidents, including outside business hours if required. • Documentation & Projects: Produce detailed technical documentation and manage multiple parallel projects with proper prioritization and reporting.

🎯 Requirements

• 3+ years managing large-scale VoIP infrastructures for enterprises or carriers. • Deep knowledge of SIP/RTP/SRTP protocols, SIP timers, session refresh, topology hiding, and NAT traversal. • VoIP-related Linux administration skills: system monitoring, tcpdump/pcap analysis, QoS, firewalls (iptables/nftables), and SIP DoS protection. • Proven ability to troubleshoot using pcap dumps and SIP/media analysis. • Solid understanding of regional telecom regulations and ability to align solutions with compliance. • Strong experience writing and maintaining technical documentation and procedures. • Nice to Have • Familiarity with WebRTC • Experience migrating large contact centers to cloud or hybrid deployments. • Expertise with SBC Audiocodes: advanced routing, manipulation rules, HA clustering, TLS/SRTP termination, interworking. • Genesys Cloud certification • What We’re Looking For • A technical leader who can own and evolve VoIP services in Saudi Arabia. • A problem solver with strong engineering intuition and risk awareness. • A communicator skilled in negotiating with telecoms, vendors, and regulators. • A team player who documents, mentors, and drives operational excellence.

🏖️ Benefits

• Full-time B2B contract • Fully remote setup, work from anywhere in Europe • Up to 20% tax allowance • 22 paid leave days annually • Stock options (ESOP) in a fast-scaling, pre-IPO company • Flexi benefits you can use for wellness, travel, or learning • Work alongside a high-performing, international engineering team in a global fintech unicorn