Blog

Insights from the Vertex team

Engineering deep-dives, product announcements, and stories from the team building Pakistan's enterprise messaging infrastructure.

Jun 24, 2025· 8 min
Engineering

How we reduced OTP delivery latency by 60% across all operators

We rebuilt our operator routing layer from the ground up. Here's how we cut median OTP delivery from 1.2 seconds to under 480 milliseconds across Jazz, Zong, Telenor and Ufone.

Zara Khan
OTPSMSTelecomPakistan
Jun 12, 2025· 5 min
Product

WhatsApp Business API is now available in Pakistan

Vertex is now a Meta Verified BSP for WhatsApp Business API. Pakistani businesses can send templated notifications, engage in session messaging, and deliver rich media — all from the Vertex platform.

Fatima Ali
WhatsApp APICPaaS
May 28, 2025· 10 min
Engineering

Building a DND compliance engine for enterprise messaging

Navigating Pakistan's DND regulations at scale is complex. We built a compliance engine that checks every message against PTA DND registries, preference lists, and time-of-day rules.

Omar Chaudhry
DND ComplianceSMSTelecom
May 15, 2025· 12 min
Company

Vertex passes 1 billion messages — lessons from the journey

A behind-the-scenes look at the infrastructure, team and decisions that got us to one billion messages routed. What worked, what broke, and what we'd do differently.

Tariq Mehmood
CPaaSPakistan
Apr 30, 2025· 7 min
Engineering

Our API design philosophy at Vertex

Consistent, idempotent, and observable. We share the principles that guide every endpoint we build, from request IDs to signed webhooks to rate limiting.

Zara Khan
API DesignWebhooks
Apr 18, 2025· 6 min
Engineering

SMPP vs REST API: choosing the right protocol for your use case

Not every workload belongs on SMPP. We compare throughput, latency, developer experience and operational complexity to help you choose the right channel.

Omar Chaudhry
SMPPAPI DesignTelecom
Apr 5, 2025· 4 min
Product

Announcing real-time DLR analytics on Vertex

Track every message from send to delivered with operator-level breakdowns, latency histograms, and cohort-based funnel analysis. Built for reconcilers and engineers alike.

Fatima Ali
DLRCPaaS
Mar 20, 2025· 9 min
Security

Security at Vertex: how we protect your messages

From encryption at rest to signed webhooks to SOC2-aligned access controls — a deep dive into the security measures that protect every message on Vertex.

Sabeen Malik
DND ComplianceWebhooksAPI Design
Mar 8, 2025· 11 min
Engineering

Scaling our SMPP gateway to handle 50,000 TPS

A technical deep dive into the architecture, optimizations and load testing that allowed our SMPP gateway to handle 50,000 transactions per second during peak hours.

Zara Khan
SMPPTelecomDevOps

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