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I am a full-stack software engineer with 5+ years building large-scale, high-traffic systems across payments, insurance, and retail (Mastercard, Zurich, Marks & Spencer). I specialize in Java 17/21, React 18, Next.js, Spring Boot 3, Kafka, GraphQL, PostgreSQL, AWS, Docker, and Kubernetes.\n\nI design distributed, event-driven architectures with observability and security baked in, delivering low-latency, resilient platforms serving millions of users. I have driven 40%+ performance gains and maintained 99.99% uptime while ensuring OWASP/GDPR/PCI compliance.…I am a full-stack software engineer with 5+ years building large-scale, high-traffic systems across payments, insurance, and retail (Mastercard, Zurich, Marks & Spencer). I specialize in Java 17/21, React 18, Next.js, Spring Boot 3, Kafka, GraphQL, PostgreSQL, AWS, Docker, and Kubernetes.\n\nI design distributed, event-driven architectures with observability and security baked in, delivering low-latency, resilient platforms serving millions of users. I have driven 40%+ performance gains and maintained 99.99% uptime while ensuring OWASP/GDPR/PCI compliance.

Raj Kalyan Reddy Bezawada

Full Stack Developer, Web Developer, Back-End Developer, +2

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I am a full-stack software engineer with 5+ years building large-scale, high-traffic systems across payments, insurance, and retail (Mastercard, Zurich, Marks & Spencer). I specialize in Java 17/21, React 18, Next.js, Spring Boot 3, Kafka, GraphQL, PostgreSQL, AWS, Docker, and Kubernetes.\n\nI design distributed, event-driven architectures with observability and security baked in, delivering low-latency, resilient platforms serving millions of users. I have driven 40%+ performance gains and maintained 99.99% uptime while ensuring OWASP/GDPR/PCI compliance.…I am a full-stack software engineer with 5+ years building large-scale, high-traffic systems across payments, insurance, and retail (Mastercard, Zurich, Marks & Spencer). I specialize in Java 17/21, React 18, Next.js, Spring Boot 3, Kafka, GraphQL, PostgreSQL, AWS, Docker, and Kubernetes.\n\nI design distributed, event-driven architectures with observability and security baked in, delivering low-latency, resilient platforms serving millions of users. I have driven 40%+ performance gains and maintained 99.99% uptime while ensuring OWASP/GDPR/PCI compliance.

Available to hire

I am a full-stack software engineer with 5+ years building large-scale, high-traffic systems across payments, insurance, and retail (Mastercard, Zurich, Marks & Spencer). I specialize in Java 17/21, React 18, Next.js, Spring Boot 3, Kafka, GraphQL, PostgreSQL, AWS, Docker, and Kubernetes.\n\nI design distributed, event-driven architectures with observability and security baked in, delivering low-latency, resilient platforms serving millions of users. I have driven 40%+ performance gains and maintained 99.99% uptime while ensuring OWASP/GDPR/PCI compliance.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Javanese

Fluent

Work Experience

Senior Software Developer at Mastercard

June 1, 2024 - Present

Built a Next.js + React 18 checkout platform integrating MPGS, EMV Click to Pay, and tokenization, reducing checkout latency by 40%. Engineered Spring WebFlux + Spring Cloud microservices with GraphQL APIs; supported 50M+ monthly transactions with sub-200ms latency. Integrated MDES tokenization with async risk scoring via gRPC and Kafka streams, improving fraud detection accuracy by 25%. Applied OAuth2/OIDC, JWT, mTLS, and AWS Secrets Manager for security; led threat modeling workshops. Achieved 99.99% uptime SLA with OpenTelemetry, Prometheus/Grafana, and JVM profiling. Deployed with AWS EKS, Docker, Helm, Terraform, GitHub Actions; implemented blue-green and feature-flag rollouts with LaunchDarkly.

Software Engineer at Zurich Insurance

August 1, 2023 - October 16, 2025

Built policyholder self-service portal in React 18 + TypeScript with secure uploads and WCAG 2.2 AA compliance. Developed Spring Boot 3 microservices with CQRS and Saga/Outbox, ensuring reliable claim event processing. Integrated with core systems using REST & gRPC; modeled claim events on Kafka + SNS/SQS. Oracle/PostgreSQL hybrid persistence. Secured portal with SAML SSO (Okta), OAuth2/OIDC APIs, and mTLS; enforced GDPR/OWASP standards. Increased throughput by 35% with optimized DB indexing; reduced incident MTTR by 45% via Grafana dashboards. Scaled platform to 100K+ concurrent enterprise users with Kubernetes + AWS Terraform infra.

Junior Software Developer at Marks & Spencer

March 1, 2021 - October 16, 2025

Implemented Sparks loyalty & Click-and-Collect features in React 18 + Redux Toolkit, ensuring accessibility compliance. Developed Spring Boot microservices for offers and loyalty wallet; optimized PostgreSQL + Redis caching to reduce API response times by 60%. Streamed order/loyalty events via Kafka; delivered real-time status with SSE; improved triage with ELK dashboards. Hardened APIs with Keycloak OAuth2/JWT, TLS, Vault secrets, and OWASP checks. Drove CI/CD with Jenkins + Docker + PCF; applied feature flags with LaunchDarkly for safe rollouts.