Kuntal Rathod
curious about most of the stackfull-stack developer / web · backend · system design
1.8+ yrs experienceI build things
that talk to
the real world.
I build production-grade web applications that scale. Specializing in full-stack development, robust backend architectures, and intelligent AI integrations.
currently building AI-driven web products end to end — frontend, backend, and the architecture that holds it all together.
Engineering notes / 01
“I don't just build web apps —
I build software that interacts with the real world.”
- web apps
- ai
- backend systems
- architecture
- humans
My work spans full-stack web development, backend engineering, system design, and AI — products that hold up in production, from the interface down to the architecture behind it, including financial systems and business software. I care about clean architecture, performance, and building systems that scale beyond the first release.
Where I've been building
logos, dates and notes exactly as they happened.
ThinkerSky Technologies Pvt. Ltd.
Full-Stack Developer
technical notes (8)
- Worked on an enterprise business software platform, building features for financial workflows, operational processes, reporting, and document management.
- Built multi-currency financial workflows handling forward contracts, MTM calculations, daily accruals, and settlement processes, with transactional integrity and audit logging.
- Developed accounting and financial reporting features including journal entries, transaction reports, multi-level financial records, Balance Sheet, and Profit & Loss statements using MySQL and Sequelize.
- Built workflow-driven systems for quality analysis and operational tracking, including parameter-based data capture, approval flows, automated calculations, and real-time status visibility.
- Developed financial record management features with relationship management, automated PDF generation, commission tracking, reconciliation workflows, and Excel/PDF reporting.
- Designed and developed REST APIs and database-driven features using Node.js, Express.js, MySQL, and Sequelize, focusing on validation, transactional consistency, and performance.
- Improved application performance and user experience through background pagination, asynchronous data loading, and status-based filtering.
- Integrated AWS S3 for secure file uploads and document storage using pre-signed URLs, and built CSV bulk import workflows with multi-level validation and sequential processing to prevent duplicate or inconsistent records.
B.Tech, Computer Science & Engineering
Darshan University, Rajkot, Gujarat
2021 – 2025
Things I've built
some survived production. some taught me something.
PayNudge
AI Invoice Follow-Up Automation
AI-powered invoice follow-up automation for freelancers and small businesses. Create invoices, track payments, and let AI draft follow-up emails for overdue invoices — with a human approving every message before it sends.
Paperkit
Client-Side PDF Toolkit
Paperkit
34 PDF tools that run entirely in your browser. No uploads, no watermarks, no sign-up — merge, compress, OCR, redact, encrypt, and even chat with a PDF, all processed client-side with WebAssembly.
2 on file — each one shipped, broke, and got fixed at least once.
// archive is append-only. nothing here has been quietly deleted.
open the full archive ↗Tools I keep around
inventory sheet. no proficiency bars — they were never honest anyway.
Languages
- JavaScript
- TypeScript
- HTML
- CSS
Frontend
- React
- Next.js
- Tailwind CSS
- shadcn/ui
Backend
- Node.js
- Express.js
- Prisma
- Sequelize
Data
- PostgreSQL
- MongoDB
- MySQL
- SQLite
- Redis
- Supabase
Tools
- Git
- Postman
- Docker
- AWS
- Vercel
// the list is the boring part. what matters is which ones I reach for first, and why.
github / KuntalRathod
proof that the keyboard wasn't decorative.
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Always open to discussing product architecture, full-stack development, or new opportunities. Let's make something exceptional.