Next.js
,TypeScript
,Go
,Java
andPostgreSQL
. Driven by a passion for scalable, user-centered software.Featured
• Spearheading product strategy and engineering for SchoolPro, a comprehensive management system for educational institutions.
• Architected and delivered secure, observable, and delightful user experiences, achieving a 45% reduction in page load times.
• Improved overall system reliability by 30% through robust infrastructure optimizations and proactive monitoring.
• Collaborating with stakeholders to define and execute product roadmaps that drive scalability and user growth.
• Maintain and evolve Connect-ISP, a hotspot billing platform used by internet service providers to sell and manage Wi-Fi access.
• Own the Go backend that handles voucher generation, plan management, payments, and session accounting at scale.
• Operate the networking layer — hotspot gateways, RADIUS-style session control, and router integrations — keeping billing accurate and uptime high.
• Build the Next.js operator dashboard for real-time revenue, subscriber, and network health monitoring.
Featured
A comprehensive school management system simplifying admissions, academics, and administration with a user-friendly interface.
A retail and wholesale marketplace bringing Nairobi's Eastleigh traders online — vendor storefronts, product discovery, and orders in one place.
Marketing and admissions site for a Christian O-Level school in Luwero District, Uganda — programs, school life, gallery, news, and a WhatsApp-first application flow.
Healthcare workforce management system for Uganda's nurses and midwives, featuring professional tracking and data insights.
About
I'm a Full-Stack Developer and Network Systems Engineer at Desishub Technologies, where I lead engineering and strategy for SchoolPro. I work across the stack in TypeScript, Go, and Java — building resilient backends, polished frontends, and the networking infrastructure that keeps them fast and reliable. Alongside product work I maintain Connect-ISP (app.connect-isp.com), a hotspot billing platform for internet service providers, and I've recently started contributing to OpenMRS, the open-source medical records system. My sweet spot is turning complex, systems-level problems into elegant, future-ready solutions.
Skills
JordanCalzen's coding journey over the past year
Fetching your GitHub activity data
Featured
A step-by-step war story of diagnosing unexpected server CPU consumption — from raw process inspection to a Docker container running a tight metadata retry loop.
Dive into the architectural patterns that ensure microservices reliability: Circuit Breakers, Bulkheads, Saga, and Observability in depth.
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Development
Design & Developed by JordanCarlzen
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