Event-driven Core
Kafka-based bus with idempotent retry semantics and a per-connector dead-letter queue.
Case study · Telecoms · 2026
Launched 3 new VAS revenue streams on a single integration layer.
A regional MNO needed to launch agricultural advisory, financial wellness and SME credit-scoring VAS in eight months — with billing, USSD, SMS, fraud and CRM all needing to talk to each other.
0systems integrated
+0%ARPU lift on opt-in users
0ms p95 service response
The brief
Where A regional mobile network operator started.
A regional MNO with 14M subscribers had three new VAS products in the roadmap and a competing operator launching equivalent products in 6 months. Their integration layer was a hand-rolled bus that took 6+ weeks per new connector.
The challenge
The five things in the way.
- 01
Connector backlog of 8 weeks blocked product launches
- 02
No real-time fraud signals — losses showing up in monthly settlement
- 03
Subscriber view fragmented across 4 systems for support agents
- 04
No clean way to A/B test new VAS pricing
- 05
Regulatory reporting was a 4-day exercise per month
The approach
How we framed the work.
- Audited the existing bus and identified the 7 highest-leverage connectors
- Replaced with an event-driven core (Kafka + a connector framework)
- Built a subscriber-360 service consumed by support, fraud and product teams alike
- Shipped VAS launches in parallel rather than serially
What we built
Four components, sequenced over the engagement.
Connector Framework
A reusable scaffold so new connectors take 3 days, not 3 weeks.
Subscriber-360
Real-time aggregated view of every subscriber across CRM, billing, USSD, support, and fraud.
Fraud Signals
Sub-100ms scoring at the connector edge, with heavier analysis routed to the warehouse.
Outcomes
What landed for the business.
- 0114 systems integrated in 8 months — 3 of them new connectors built in under a week each
- 02+8.4% ARPU on subscribers who opted into any of the 3 new VAS
- 03< 90ms p95 response for the subscriber-360 service
- 04Fraud losses cut by 41% in the first quarter
- 05Regulatory reporting now generated in 5 minutes
"Three product launches we thought would take 18 months landed in 8 — same team, but suddenly the systems weren’t fighting us."
— Head of VAS, regional MNO
Build something like this
