About the role
You will set the architecture of our telecommunications platform: softswitches, session border controllers, routing, rating and monitoring. You will design for high availability, security and growth across many partner networks.
What you will do
- Design the platform architecture: softswitches, SBCs, routing and rating
- Plan capacity, redundancy and geographic failover
- Set security and anti-fraud standards for the platform
- Choose and integrate platform vendors and open-source components
- Design CDR, rating and billing data flows with the finance team
- Lead technical due diligence on partner interconnects
Minimum qualifications
- Bachelor's degree in Telecommunications, Computer Science or a related field, or equivalent practical experience
- 8+ years in telecommunications engineering, including 3+ years as an architect
- Designed carrier-grade platforms handling high call volumes (examples you can walk us through)
- Expert in SIP, SBC design and softswitch platforms (PortaOne, Sippy, FreeSWITCH or Kamailio)
- CDR, rating and billing integration
- UK telecommunications rules: Ofcom General Conditions and CLI requirements
- English at CEFR C1 or above (IELTS 7.0 or equivalent)
Expert knowledge
- Carrier-grade design: active-active clustering, geographic redundancy and 99.99% availability
- Routing engines: least-cost and quality-based routing, number analysis and porting databases
- Fraud prevention architecture: real-time traffic analytics and automatic blocking
- CLI authentication and caller ID standards (STIR/SHAKEN and Ofcom CLI guidance)
Preferred qualifications
- Kubernetes-based telecommunications platforms
- IMS or 5G core knowledge
- Experience with Middle East and African partner networks
- TOGAF certification
Before any offer we verify your certificates, qualifications, references and right to work in the UK. Security roles also need background screening (BPSS) and may need security clearance.
SOWTK is an equal opportunity employer. We welcome applicants of every background and do not discriminate on any characteristic protected by the Equality Act 2010.