Krishan Jangir

Java backend engineer with 5 years of experience at FIS Global, working on real-time payments and core banking systems for major banks. Hands-on with Java, Spring Boot, Kafka, and AWS, building microservices that handle high transaction volumes with fast response times. Experienced in ISO 20022 payment messaging and integrating payment systems with core banking platforms and security remediation — investigating SAST and SCA findings (Checkmarx, SonarQube) and upgrading vulnerable dependencies.

Software Engineer at FIS Global (2021-03 – 2026-03)

Worked on two flagship products in the Payments & Core Banking division, growing from contributor on CBIS to owning services on a greenfield real-time payments build.

• Built Spring Boot microservices for a national real-time payments scheme (PayNet's RPP / DuitNow), handling inter-bank and intra-bank clearing and settlement over ISO 20022 — on a network clearing around 23 million transactions a day.
• Worked on several services end-to-end — building, testing, deployment, and on-call support — on AWS EKS, meeting the scheme's sub-second clearing SLA.
• Used Kafka for asynchronous messaging between payment services, with error handling and safe message reprocessing to prevent duplicate payments.
• Added resilience with Resilience4j — circuit breakers, retries, and distributed tracing — reducing production incidents and recovering faster from failures.
• Set up monitoring dashboards and alerts (CloudWatch) for latency, error rates, and Kafka consumer lag.
• Integrated a unified payment hub with multiple core banking and general-ledger systems through a suite of REST services for tier-1 bank clients.
• Connected legacy IBM MQ systems with newer Kafka-based services, letting on-prem systems work with cloud-native services without a rewrite.
• Automated the payment-UI regression suite, cutting manual QA effort by ~60% and speeding up releases.
• Cleared Checkmarx security scans as part of the release gate.

Bachelor of Technology – MVJ College of Engineering (2016 – 2020)