Staff Messaging Engineer

Role Description

We're looking for a Staff Messaging Engineer (SMS/MMS) to own the architecture and reliability of our messaging infrastructure at scale. This is a high-impact individual contributor role: you will shape how SMS and MMS traffic flows across our platform, drive carrier integrations, and set the technical direction for messaging across a distributed team of engineers. This role owns message routing, throughput, delivery reporting, and compliance across U.S. and international networks.

• Design, deploy, and operate SMS and MMS routing, delivery, and reporting systems across multiple carriers and messaging hubs
• Evaluate, configure and maintain SMPP connections for SMS and MM7 interfaces for MMS, including routing, throttling, retries, and failover
• Support 10DLC, toll-free, short code, and international messaging workflows
• Build and maintain APIs for outbound and inbound messages, delivery receipts (DLRs), and webhooks
• Monitor throughput, delivery success, carrier response codes, and system performance
• Investigate and resolve deliverability issues, including blocking, filtering, and spam classification
• Enforce compliance with CTIA guidelines, opt-in/opt-out rules, and 10DLC requirements
• Partner with SIP, network, and customer success teams to support enterprise messaging customers
• Maintain technical documentation, routing logic, carrier mappings, and escalation procedures

Qualifications

• 5+ years of experience building or operating SMS / MMS platforms in telecom, MNO, MVNO, or CPaaS environment
• Hands-on experience with SMSC/MMSC platforms using SMPP for SMS and MM7 for MMS
• Experience implementing and deploying Azure cloud-base platforms
• Experience with carrier-grade messaging systems such as Jasmin, Melrose Labs, or similar routing platforms
• Designing, implementing and maintaining high-availability, multi-regional queue-based Kubernetes cloud-based message traffic routing
• Strong understanding of SMPP, MM7, delivery receipts (DLRs), and carrier error codes
• Experience integrating with U.S. mobile carrier or global messaging aggregators
• Ability to troubleshoot and resolve issues in live production messaging systems
• Experience turning SMPP bind modes, throughput limits, and routing priorities
• Experience with MMS media hosting, delivery, and content handling experience
• Familiarity with AI development workflows and tools is strongly preferred

Technologies & Tools

• SMS/ MMS
• SMPP
• Messaging Gateways
• Carrier APIs
• mPaaS
• FMC / MFC
• Wireshark
• Linux
• REST / APIs

Benefits

• Competitive compensation package, including performance-based bonus potential and comprehensive health benefits
• 100% employer-paid medical, dental, and vision
• Unlimited PTO
• Equipment provided