Arnab Roy

Background

About Arnab Roy

Fluency and Specialization in Java, C#, Javascript, HTML, CSS * In-depth knowledge of CS data structures and algorithms * Extensive experience in test driven development, unit, regression, integration, acceptance testing.* Deep experience and expertise with micro service architecture and implementation (REST, gRPC)* Great understanding of open-source databases like MySQL, PostgreSQL. Familiarity with NoSQL solutions (Cassandra, MongoDB)* Proven experience designing and delivering highly-resilient event-driven and messaging based solutions at scale with minimal latency (Kafka).* Experience with building products with strong focus on SaaS architecture.* Experience with application monitoring tools (Splunk, NewRelic)* Experience with Git, Git workflows, CVS, VSS.* Experience with Docker, Kubernetes over cloud infrastructure (Google cloud)* Experience in implementing security protocols across services and products: Understanding of Active Directory, Windows Authentication, SAML, OAuth * Deep familiarity with Agile methodology At Priceline, I lead the Payments Engineering team to design and implement robust, scalable, and extensible payment platforms. Our team has developed asynchronous, event-based systems for funds capture and refund processing, achieving granular transaction visibility while ensuring PCI compliance. By implementing smart switching algorithms we can support multiple payment gateways like BrainTree, Chase Paymentech etc. This ensures 24*7 availability even in the case of provider outages. In addition we implemented fully transactional back end API driven flows for refunds and reconciliation as well as vendor/supplier payouts using VCC and Payout solutions(Paypal Hyperwallet). All systems fully granular and transactional enabling full visibility down to individual payments. I lead multiple teams of engineers working on the payment stack across time zones that ensure 24*7 engineering support for our stack that processes multiple billion transactions yearly. My mission is to build bulletproof engineering platforms that empower business teams with precision, reliability, and maintainability. Collaborating with cross-regional teams, we prioritize fundamental software engineering principles to deliver solutions that scale with business demands. Passionate about low-latency systems, error visibility, and rapid bug resolution, I focus on enabling seamless payment experiences while fostering a culture of technical excellence.