Intermediate Billing Operations Engineer

SUMMARY:
INTERMEDIATE BILLING OPERATIONS ENGINEER
Location: Illovo, Sandton (4 days in office, 1 day remote)
Type: Permanent, Full Time

About Our Client
We are recruiting on behalf of a well-established South African telecommunications and IT solutions provider, delivering services across voice, networking, security, collaboration, and infrastructure. This is a business that invests in best-of-breed technology and takes pride in a team culture that is collaborative, technically excellent, and genuinely enjoyable to be part of.
This role is based at their modern Illovo, Sandton offices — a great working environment with a fantastic company culture and a stunning canteen offering full cooked lunches daily. If you are someone who values both the quality of the work and the quality of the environment you do it in, this is worth paying attention to.

POSITION INFO:

The Role
We are looking for an Intermediate Billing Operations Engineer to join this growing infrastructure team. This is a hands-on technical role sitting at the heart of how the business bills its customers and manages its carrier relationships. You will own the billing systems — keeping them running, accurate, and optimised — while working closely with Finance, IT, and Product teams to make sure revenue flows correctly and nothing falls through the cracks.
If you are someone who gets satisfaction from finding billing discrepancies, solving complex system problems, and knowing that your work directly protects company revenue, this role is for you.
What You Will Be Doing

• Building and refining mediation rules and usage flows in the billing system
• Analysing call rating, margins, and customer charges to ensure accuracy
• Managing and optimising national and international carrier routes and costs
• Attending to month-end billing and resolving any issues that arise
• Investigating and resolving carrier disputes and irregularities
• Auditing new products and plans and implementing the correct rating
• Identifying and closing revenue leakage gaps
• Maintaining and optimising billing servers and databases
• Managing product catalogues, call charge rates, and prefix lists
• Leading or contributing to billing system migrations and integrations
• Developing reports, documentation, and process improvements
• Supporting internal and external stakeholders with queries and escalations

• 5 to 7 years of experience in a VoIP or telco billing role within a service provider environment
• 5 to 7 years of hands-on Linux/Unix experience
• 5 to 7 years working with SQL databases — you must be comfortable writing and troubleshooting queries
• Intermediate Python or Perl scripting skills
• Solid understanding of both fixed and variable billing models
• Experience with carrier management, reconciliation, and interconnect billing
• Experience integrating billing systems with accounting packages or middleware
• Strong analytical skills — you must be able to work through large amounts of data accurately and confidently
• Good communication skills — written and verbal — for internal and vendor engagement
• Highly organised, process-driven, and self-managed

• Experience with billing system migrations
• Familiarity with BSS/OSS environments
• Revenue assurance background
• A relevant degree or diploma