Christian Jayson N.

Hi! I’m Christian, a results-driven software developer with 9 years of hands-on experience building, modernizing, and optimizing business-critical systems. If you’re dealing with slow legacy software, repetitive manual processes, complex databases, or expensive subscription-based tools, I can help you build a practical solution that you actually own. I specialize in reliable Windows-based business applications that can work offline, keep your data under your control, and reduce dependency on recurring software subscriptions. If you need cloud access, I can also design the application to work with cloud infrastructure, with hosting costs depending on the provider and setup you choose. HOW I CAN HELP YOU 🚀 • Build custom Windows applications using Clarion • Create utility apps that automate repetitive business processes • Optimize SQL queries, reports, and heavy data processing • Modernize and maintain legacy applications • Convert legacy systems such as Visual FoxPro and Topspeed DB • Develop and integrate REST APIs with existing systems • Build and support Inventory, ERP, POS, and Credit Management solutions • Improve existing applications without replacing your entire system WHY CUSTOM SOFTWARE? 💡 OWN THE APPLICATION The application or utility I create for your business can be yours to use without a mandatory monthly or yearly software subscription. Instead of continuously paying for access to a SaaS product, you can have a dedicated solution built around your requirements. WORK OFFLINE Applications can be designed to operate without a constant internet connection—useful for businesses with unreliable internet or workflows that don't require cloud connectivity. CONTROL YOUR DATA 🔐 Your data doesn't have to live in someone else's cloud. For suitable applications, data can be stored locally or on infrastructure you control, giving you greater control over your information and backups. NEED CLOUD ACCESS? I can also design solutions for centralized data, multiple locations, remote access, or other cloud-based requirements. Cloud hosting and related services are separate costs determined by the provider and infrastructure selected. SERVICES 👨‍💻 • SQL Analysis & Process Optimization — MySQL, MariaDB, and SQL Server • Custom Windows Utility Applications • Database Migration & Modernization • Legacy Application Modernization • Report & Query Optimization • REST API Integration • Business Process Automation • Inventory, ERP, POS & Credit Management Systems PROVEN EXPERIENCE ⭐ • Migrated a Topspeed database into SQL for a more modern and maintainable solution • Ported a Visual FoxPro application into a newly maintained Clarion-based application • Rebuilt heavy report processing using optimized SQL queries, reducing processing time from 5+ minutes to seconds • Developed and supported Inventory Management, ERP, POS integration, Credit Management, and sales-processing systems CLIENT TESTIMONIALS “Christian transformed our reporting system — what used to take over 5 minutes now runs in seconds. This saved our team countless hours every week.” – Inga N. “His expertise in SQL optimization and legacy system migration made a huge difference in our operations. Reliable, efficient, and very easy to work with.” – Linas N. SKILLS & TECHNOLOGIES 🛠️ • Clarion • SQL • MySQL • MariaDB • SQL Server • SQL Query Optimization • ETL • Database Migration • Visual FoxPro • Topspeed Database • REST API Integration • Windows Applications • Legacy System Modernization • ERP • Inventory Management • POS Integration • Report Optimization • Business Automation LET'S BUILD SOMETHING YOU OWN 🤝 Have a manual process you'd like to automate, a slow application that needs optimization, or a SaaS tool that's becoming expensive? Send me a message on Upwork and tell me what you're trying to accomplish. I'll help you determine whether a custom application, database solution, automation utility, or cloud-connected system is the right fit. Let's build a solution that works for your business—and that you can actually own.