Full-stack developer
Hi, I’mSanjaisiva N
I build web applications, backend APIs, and mobile apps.
From interface to implementation.
I develop applications from the interface to the data behind it. My work spans e-commerce, business websites, and mobile invoicing, with a focus on clear user flows and maintainable code.
I handle the details that connect a working interface to a complete product: validation, authentication, data consistency, and integrations. Each project below explains the implementation, the decisions behind it, and what still needs work.
What I do
Web interfaces
Responsive interfaces with React and Next.js, from product browsing and checkout to service pages and enquiry forms.
Backend systems
APIs, data models, authentication, and payment integrations with explicit validation and business rules.
Mobile applications
React Native and Expo development, including local drafts, API synchronisation, and PDF generation in an invoicing app under testing.
Selected work
All projects- Invoice GeneratorUnder testing: shared money rules, draft sync, and invoice PDFs.
- Crown KidzPayments, inventory, and the correctness work underneath both.
- TooloraOne registry, 110 tools, and a lot of thinking about search.
- Neer AutomationService explanations, enquiry flows, and local search foundations.
Building something where correctness matters?
Tell me what you have in mind.