Company Description :

Evince Development Pvt. Ltd. (EvinceDev) is a CMMI 3-Level leading IT service company that delivers innovative solutions to clients worldwide. With a commitment to excellence and a dynamic team of professionals, we aim to exceed client expectations and drive success through cutting-edge technology.

Website link: https://evincedev.com/

• Design and implement the PostgreSQL (cloud) and SQLite (local kiosk cache) schemas for product catalog, transactions and kiosk telemetry.
• Build backend logic converting RFID tag-read and weighing-scale events into verified cart additions, including exception handling.
• Integrate a payment gateway SDK (Razorpay or PayU, sandbox credentials) covering UPI, card and wallet payment initiation, status polling, and receipt generation.
• Integrate Payment Terminal Connect to support physical card-terminal payments, including terminal connection, payment request initiation, transaction status handling, and receipt/transaction confirmation.
• Build robust handling for payment edge cases - gateway timeout,



network drop mid-transaction, duplicate payment attempts - so the kiosk never double-charges.
• Design and implement the offline-mode local cache and queued, idempotent transaction sync so no transaction is lost or double-counted on reconnect, including conflict resolution when local and cloud state disagree.
• Build backend support for the Store Management Dashboard: live kiosk status, exception/alert feed, transaction log and filters, and the POC summary report used as exit-criteria evidence.
• Participate in feature-level functional testing and bug-fix cycles ahead of the internal demo.
• Document the backend API and hardware integration points implemented, for reuse in the Pilot phase.
• 5+ years skilled backend development experience, with strong ASP.NET Core (or equivalent .NET) REST API experience.
• Solid experience with relational databases (PostgreSQL preferred) and embedded/local data stores (SQLite

📌 Dot Net Developer (Ahmedabad)
🏢 Evince Development (CMMI Level 3 Certified)
📍 Ahmedabad