Krishan Jangir

Software Engineer

Talent

NorthamptonMember since 8 April 2026

JavaPythonSQLSpring BootSpring SecurityOAuth 2.0Spring DataSpring CloudHibernateJPAAWS EC2AWS S3AWS RDSAWS ECSAWS CloudWatchKubernetesDockerTerraformApache KafkaIBM MQPostgreSQLMySQLOracleJenkinsBitbucket PipelinesGitSVNSonarQubeVeracodeBlack DuckREST API DesignMicroservices ArchitectureJIRAConfluenceSoapUISwaggerOpenAPI

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JavaPythonSQLSpring BootSpring Security

About

Backend Software Engineer with 5 years of experience designing and delivering enterprise-grade payment and core banking systems. Specialist in Java, Spring Boot, Kubernetes, and AWS, with deep domain expertise in real-time payments, core banking integration, and accounts/settlement processing. Proven track record of integrating multiple banking products into unified platforms handling high transaction volumes.

Seeking a backend engineering role within a UK-based bank, fintech, or integration-focused technology company.

Experience

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

Designed and delivered enterprise-grade payment and core banking systems for the Malaysian payments ecosystem and integrated multiple core banking platforms.

Designed and developed key modules for a greenfield real-time payment clearing and settlement platform, enabling inter-bank and intra-bank transactions for the Malaysian payments ecosystem.
Built RESTful microservices using Java 11+ and Spring Boot, deployed on Kubernetes clusters in AWS, processing high-throughput payment flows with sub-second latency targets.
Implemented event-driven architectures using Apache Kafka for asynchronous payment processing, ensuring reliable message delivery and fault tolerance across distributed services.
Collaborated with cross-functional teams including product owners, QA, and infrastructure engineers to deliver incremental releases following Agile/Scrum methodology.
Integrated a unified payment hub and order management system with multiple core banking and general ledger systems via a suite of REST web services, handling very high daily transaction volumes.
Implemented OAuth 2.0 authorisation for all CBIS banking service endpoints, strengthening API security posture and enabling fine-grained access control.
Automated the regression testing suite for the payment UI layer, significantly reducing manual QA effort and improving CI/CD pipeline reliability.
Conducted code reviews, mentored junior developers, and contributed to architectural decision records for microservices decomposition and API contract design.
Worked with IBM MQ for legacy system integration and Kafka for modern event streaming, bridging older banking platforms with new cloud-native services.