- Built web service to monitor, gather and analyze data from industrial equipment e.g. agricultural processors, weighing scale, temperature sensors, etc. for a factory.
- Built prototype image recognition system to analyze aerial imagery of agricultural lands and detect disease-infected areas. (Python, Keras)
- Developed an Android app for a digital farming solution to provide farmers with live data from the image analysis system, aggregating other information, presented as mixed augmented reality. (Android, Python)

Working on CyberSource, a Visa owned payment processing service, building integration with payment systems across the world.

Built REST APIs for backend systems used in work administration, data collection, processing, and reporting. Apart from hands-on coding, I was involved in code review, driving decisions on the features and modules I owned.

- Built caching infrastructure (with Apache Kafka-based cache replication) to cut fetch time.
- Built API Gateway to enable seamless &amp; scheduled deployment with CI/CD infrastructure to avoid downtime &amp; provide a common authentication layer to all underlying services.
- Designed libraries for easy configuration-driven usage &amp; integration of Kafka-based common messaging infra – targeted towards any developer inside the company to be able to use the shared services as a platform.

Designing REST APIs for the backend for processing high-volume financial transactions. This was for a company in the agricultural trading business, enabling them to make purchases directly.
(Java, Spring Boot, MS SQL Server, MS Azure)
- The systems processed about half a million financial transactions in a span of an hour – twice a day.
- Designed &amp; integrated multi-party authentication for use-case where a transaction required a chain of authorizations.

Senior Software Engineer @ Visa Inc.

Simple, lightweight and ad-free app for quick lookup of urban dictionary

Simple Urban Dictionary Lookup Android App

Extremely basic and lightweight xkcd reader with swipe gesture support

Minimal xkcd Comic Reader

This is an Arduino based system that's fit in your home and is pre-programmed to connect to an external server that a user will connect to from an web-page.
A user connects to the project service server through it's webpage and logs in with

Arumoy Chakraborty

Senior Software Engineer @ Visa Inc.