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Hi, I’m Sai Nitesh Bachupally, a Senior Full Stack Developer with 4 years of experience delivering cloud-native, high-performance FinTech and enterprise applications. I specialize in Java (Spring Boot), Node.js, Python, and React/TypeScript, with strengths in microservices, event-driven architectures, scalable system design, and advanced data structures and algorithms. I’m proficient with AWS, Docker, Kubernetes, CI/CD pipelines, and distributed databases, and I have deep experience with secure authentication (OAuth2, JWT, MFA), tokenization, and PCI-compliant payment systems. I’m also exploring Generative AI, Agentic AI, and prompt engineering to automate intelligent workflows in production systems. In my recent roles, I modernized legacy systems, built secure payment services, and delivered AI-enabled automation to improve compliance and fraud detection. I enjoy collaborating across teams to design robust architectures, optimize performance, and improve user experiences, especially under high traffic. I’m excited to apply AI to fintech challenges and to contribute to resilient, observable software that customers trust.…Hi, I’m Sai Nitesh Bachupally, a Senior Full Stack Developer with 4 years of experience delivering cloud-native, high-performance FinTech and enterprise applications. I specialize in Java (Spring Boot), Node.js, Python, and React/TypeScript, with strengths in microservices, event-driven architectures, scalable system design, and advanced data structures and algorithms. I’m proficient with AWS, Docker, Kubernetes, CI/CD pipelines, and distributed databases, and I have deep experience with secure authentication (OAuth2, JWT, MFA), tokenization, and PCI-compliant payment systems. I’m also exploring Generative AI, Agentic AI, and prompt engineering to automate intelligent workflows in production systems. In my recent roles, I modernized legacy systems, built secure payment services, and delivered AI-enabled automation to improve compliance and fraud detection. I enjoy collaborating across teams to design robust architectures, optimize performance, and improve user experiences, especially under high traffic. I’m excited to apply AI to fintech challenges and to contribute to resilient, observable software that customers trust.

Sai Nitesh Bachupally

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

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Hi, I’m Sai Nitesh Bachupally, a Senior Full Stack Developer with 4 years of experience delivering cloud-native, high-performance FinTech and enterprise applications. I specialize in Java (Spring Boot), Node.js, Python, and React/TypeScript, with strengths in microservices, event-driven architectures, scalable system design, and advanced data structures and algorithms. I’m proficient with AWS, Docker, Kubernetes, CI/CD pipelines, and distributed databases, and I have deep experience with secure authentication (OAuth2, JWT, MFA), tokenization, and PCI-compliant payment systems. I’m also exploring Generative AI, Agentic AI, and prompt engineering to automate intelligent workflows in production systems. In my recent roles, I modernized legacy systems, built secure payment services, and delivered AI-enabled automation to improve compliance and fraud detection. I enjoy collaborating across teams to design robust architectures, optimize performance, and improve user experiences, especially under high traffic. I’m excited to apply AI to fintech challenges and to contribute to resilient, observable software that customers trust.…Hi, I’m Sai Nitesh Bachupally, a Senior Full Stack Developer with 4 years of experience delivering cloud-native, high-performance FinTech and enterprise applications. I specialize in Java (Spring Boot), Node.js, Python, and React/TypeScript, with strengths in microservices, event-driven architectures, scalable system design, and advanced data structures and algorithms. I’m proficient with AWS, Docker, Kubernetes, CI/CD pipelines, and distributed databases, and I have deep experience with secure authentication (OAuth2, JWT, MFA), tokenization, and PCI-compliant payment systems. I’m also exploring Generative AI, Agentic AI, and prompt engineering to automate intelligent workflows in production systems. In my recent roles, I modernized legacy systems, built secure payment services, and delivered AI-enabled automation to improve compliance and fraud detection. I enjoy collaborating across teams to design robust architectures, optimize performance, and improve user experiences, especially under high traffic. I’m excited to apply AI to fintech challenges and to contribute to resilient, observable software that customers trust.

Available to hire

Hi, I’m Sai Nitesh Bachupally, a Senior Full Stack Developer with 4 years of experience delivering cloud-native, high-performance FinTech and enterprise applications. I specialize in Java (Spring Boot), Node.js, Python, and React/TypeScript, with strengths in microservices, event-driven architectures, scalable system design, and advanced data structures and algorithms. I’m proficient with AWS, Docker, Kubernetes, CI/CD pipelines, and distributed databases, and I have deep experience with secure authentication (OAuth2, JWT, MFA), tokenization, and PCI-compliant payment systems. I’m also exploring Generative AI, Agentic AI, and prompt engineering to automate intelligent workflows in production systems.

In my recent roles, I modernized legacy systems, built secure payment services, and delivered AI-enabled automation to improve compliance and fraud detection. I enjoy collaborating across teams to design robust architectures, optimize performance, and improve user experiences, especially under high traffic. I’m excited to apply AI to fintech challenges and to contribute to resilient, observable software that customers trust.

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Work Experience

Senior Full Stack Developer at Mastercard

June 1, 2025 - Present

Architected and implemented a secure tokenization microservices ecosystem using Java (Spring Boot) and Hibernate to enable encrypted PAN-to-token conversion, improving transaction processing efficiency by 40% while adhering to PCI DSS standards. Designed and developed a responsive digital wallet frontend in React.js/TypeScript, optimizing checkout flows with asynchronous API calls and reducing payment initiation latency by 38%. Engineered a PostgreSQL token vault schema with advanced indexing, partitioning, and caching, boosting token lookup speed by 42% under high concurrency and ensuring data consistency across distributed services. Implemented containerized CI/CD pipelines with Docker, Kubernetes (EKS), and Helm, enabling automatic scaling, zero-downtime deployments, and multi-environment promotion, achieving system reliability around 99.95% during heavy traffic. Built secure REST and GraphQL APIs for device-based authentication, payment authorization, and MFA flows, integrating bio

Full Stack Developer at Wells Fargo

September 1, 2024 - May 1, 2025

Modernized legacy banking monoliths into domain-driven, cloud-native microservices using Spring Boot and Kafka, improving service scalability and enabling independent deployments across teams. Built high-performance banking APIs with GraphQL and Spring Boot, leveraging MongoDB aggregations, Redis caching, and concurrency-safe queries to reduce latency and improve throughput under high-volume operations. Created a real-time financial event streaming system with Kafka Streams for asynchronous transaction processing, balance updates, ledger reconciliation, and eventual consistency across services. Implemented secure authentication/authorization using JWT, OAuth2, MFA, and RBAC, strengthening identity management and regulatory compliance. Developed customer-facing banking applications with React.js/TypeScript, optimizing rendering performance and Core Web Vitals during peak salary and billing cycles. Embedded LangChain-powered Agentic AI workflows to automate transaction anomaly detection

Full Stack Developer at Accenture

March 1, 2021 - July 1, 2023

Constructed a Node.js (Express) microservices-based e-commerce platform, decomposing a legacy monolith into domain-driven services (catalog, order, inventory, payments) to enable independent deployments and reduce release cycle times by 35%. Implemented a high-performance frontend using React.js (Hooks, Redux Toolkit) with SSR/CSR optimizations, improving Core Web Vitals and reducing page load times during high-traffic events by 40%. Implemented RESTful APIs and event-driven architecture using Kafka for asynchronous order processing, real-time inventory updates, and strong data consistency across distributed warehouses. Optimized PostgreSQL persistence with advanced indexing, partitioning, and Redis caching, reducing API latency by 45% under peak load. Integrated secure payment gateways (Stripe/Razorpay) with JWT/OAuth2 authentication and RBAC for secure, compliant payments. Managed cloud deployments on AWS (EC2, Lambda, API Gateway, S3) with Docker, Terraform/CDK, and CI/CD pipelines