StarCall Phones — Billboard-Advertised Device Financing Platform
Powering citywide billboard smartphone micro-financing campaigns across Nairobi with sub-second mobile web speed and 100% platform uptime.
The Client & Business Challenge
StarCall Phones is a fast-growing consumer device financing provider in Nairobi enabling customers to purchase smartphones (Samsung, Tecno, Infinix, Redmi) on daily micro-instalment plans.
To accelerate growth, StarCall invested heavily in citywide billboard marketing campaigns across Nairobi. They required a mobile web platform capable of handling high-volume traffic surges from billboard scans, instantly calculating repayment schedules, and capturing customer financing applications without crashing or dropping leads.
The HarLyn Engineered Solution
HarLyn Digital Partners designed and engineered a custom Next.js web application and back-office management dashboard:
- Pre-rendered static Next.js architecture ensuring instant page loads across 3G/4G/5G mobile connections.
- Interactive daily instalment repayment calculator dynamically displaying deposit requirements.
- Automated application capture pipeline with atomic database ledgering in PostgreSQL.
The Measured Business Outcome
The platform delivered 100% uptime through marketing surges, enabling StarCall Phones to convert billboard traffic into verified financing customers without losing a single application to server timeouts.
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