How to integrate Paynow safely into a legacy PHP site
A step-by-step walkthrough of hardening callbacks, verifying hashes, and keeping your checkout resilient without rewriting the whole stack.
Trusted in Zimbabwe & Zambia
We build, maintain and integrate mission-critical software: ERPs, POS systems, payment gateways, WhatsApp bots and API customisations for Sage, ERPNext and Odoo. We trade on excellence.
We power projects built on
// paynow/checkout.controller.ts
Transactions overview
120+
Projects shipped across ZW & ZM
14
Industries served, from retail to fintech
99.98%
Median uptime on managed systems
< 4h
Response time on critical incidents
What we do
Custom software development, POS and payment gateway integration (Paynow and others), WhatsApp bot development, external code reviews, WordPress plugin development, Sage/ERPNext/Odoo API customisation, and production-readiness work for AI and vibe-coded apps.
One partner. Nine services. Zero surprises.
ERPs, POS systems, hardware integration and bespoke line-of-business tools tailored to your workflow.
Learn moreOwn inherited codebases with confidence. We stabilise, extend and modernise existing systems in production.
Learn morePaynow, Stripe, Flutterwave and card processors, reconciled, secure and audit-ready by default.
Learn moreCustomer-facing bots on WhatsApp Cloud API for orders, tickets, reminders and end-to-end conversational flows.
Learn moreIndependent, senior-led reviews of your codebase, architecture, security posture and delivery risk.
Learn moreAdvisory for CTOs and product leaders covering technology strategy, hiring, vendor selection and system design.
Learn moreCustom plugins, WooCommerce extensions and headless integrations built to spec and maintained long-term.
Learn moreDeep API customisation, connectors and reporting layers for the ERPs your finance team already relies on.
Learn moreBring AI-generated and prototype apps to production with hardening, testing, security and scalable deployment.
Learn moreSelected work
From ExpertPOS powering retail floors in Harare to donor management for NGOs across Zambia, we build ERPs, POS platforms, CRMs and websites that our clients in Zimbabwe and Zambia trust to run their business every day.
expertpos.co.zw
ExpertPOS runs the daily transactions of retailers across Zimbabwe with offline-first sync, ZIMRA fiscalisation, Paynow tender integration and multi-branch inventory. Click Pulse delivered the platform end-to-end and continues to maintain it in production.
Multi-branch POS rollout with real-time inventory sync.
Donor pipelines and beneficiary tracking in one system.
ore-link.co.zw
Marketing site for a mining supplies distributor.
holdittogether.co.zw
Content platform for a growing community brand.
Why Click Pulse
We are a small team of senior engineers building the software that businesses across Zimbabwe and Zambia depend on. We ship, we support, and we stay.
Architecture patterns and code quality that scales beyond the demo.
Zimbabwean and Zambian markets, Paynow, ZIMRA fiscalisation and regional tax and regulatory requirements.
Weekly demos, honest estimates, no surprises at invoice time.
We stay with the systems we build. Same team, years later.
Threat modeling, secrets management and least-privilege from day one, never bolted on later.
7+
Years delivering
40+
Clients served
25+
Systems maintained
< 4h
SLA response time
Workshops with your team to map the real problem before writing a single line of code.
Interface flows and system architecture reviewed together, so trade-offs are explicit.
Iterative sprints with working software, integrated with Paynow, ZIMRA and your existing tools.
Go-live with monitoring, on-call support and a maintenance rhythm that keeps things running.
Insights
Field-tested guides on integrating Paynow, building WhatsApp bots, deploying POS systems, and customizing Odoo, ERPNext and Sage, plus practical code reviews for teams shipping to production.
A step-by-step walkthrough of hardening callbacks, verifying hashes, and keeping your checkout resilient without rewriting the whole stack.
How to design conversation flows, route to humans gracefully, and measure deflection without turning your bot into another dead-end IVR.
A pragmatic look at where each ERP shines, the customization traps that cost you upgrades, and how to pick before you sign the vendor contract.
What clients say
"Click Pulse rebuilt our POS payments pipeline in six weeks. Reconciliation went from a nightmare to a boring cron job. Exactly what we wanted."
CTO, ExpertPOS
"They took time to understand our field workflow before writing a single line of code. Our program officers now log donor visits from anywhere in the country."
Executive Director, Health NGO
"The Odoo customization was surgical. They kept us on the upgrade path and still delivered the fleet features we needed. Rare combination in this market."
Operations Lead, OreLink