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Ronak Prajapati

Technical Architect | Digital Banking & Fintech | Cloud-Native & High-Performance Platforms | Scalable & Modern Platforms | Java & Microservices

Ahmedabad

13+ years of work experience

Bankai Infotech
Sep 20233 yrsPresent

Ahmedabad, Gujarat, India

Leading architecture, modernization, and delivery of large-scale fintech platforms across wallet, payments, and digital banking domains. Key Responsibilities & Impact: • Architecting cloud-native fintech platforms supporting wallets, ledgering, and payment processing at scale. • Leading modernization of legacy, database-centric systems into modular Java-based microservices architectures. • Driving containerization initiatives by transforming bare-metal deployments into Kubernetes-based, cloud-ready platforms. • Designing DB-agnostic architectures supporting Oracle and MySQL to enable flexibility and scalability. • Designing Active-Active, high-availability architectures to ensure zero-downtime financial systems. • Leveraging AI-assisted prompt engineering to accelerate refactoring, validation, and delivery timelines while maintaining functional parity and compliance. • Leading backend engineering teams (4+ members) with focus on architecture governance, code quality, and delivery excellence. • Collaborating with product, QA, and operations teams for UAT, performance benchmarking, and production go-lives. International Client Engagement (Indonesia Client): • Led architecture and backend delivery for a high-performance fintech wallet charging platform for a major client in Indonesia. • Replaced legacy ledgering engine with a high-throughput, API-driven backend. • Achieved 1200+ RPS through JVM tuning and system-level optimization. • Designed Active-Active high-availability deployment eliminating single points of failure. • Led onsite UAT execution and customer sign-off in Indonesia, acting as architecture owner and client communication SPOC.
Panamax Inc.
Apr 20221 yr 6 mosSep 2023

Ahmedabad, Gujarat, India

Led backend engineering teams for large-scale fintech wallet and payment platforms. Key Contributions: • Designed and implemented microservices-based backend systems using Java and Spring Boot. • Owned and coordinated critical business modules including wallet operations, ledgering, charging, and transaction workflows. • Improved system scalability and reliability for high-volume financial and non-financial transactions. • Worked closely with architects to evolve platform design toward cloud-native and high-availability models. • Led code reviews, mentored engineers, and enforced engineering best practices. • Coordinated with QA and DevOps teams for release planning, production support, and performance tuning. • Played a key role in international customer deployments and stabilization activities.
Panamax Inc.
May 20175 yrsApr 2022

Ahmedabad, Gujarat, India

Worked as a core backend engineer on large-scale fintech wallet, payment, and transaction processing platforms. Key Contributions: • Designed and developed backend services using Java and Spring Boot for wallet and transaction processing systems. • Designed and implemented a Finite State Machine (FSM)–based orchestration framework to manage configurable financial workflows and business rule execution. • Contributed to core modules including wallet operations, ledgering, charging, and balance management. • Developed REST-based APIs for financial and non-financial transaction flows. • Integrated asynchronous processing and messaging to support transaction lifecycle management. • Focused on performance optimization, defect resolution, and production issue analysis. • Collaborated with senior engineers and architects on system design and platform enhancements. • Supported production deployments and post–go-live stabilization activities.
Sterlite Tech
Jan 20152 yrs 5 mosMay 2017

Worked as part of core engineering teams building telecom Online Charging System (OCS) platforms for real-time billing. Key Contributions: • Developed high-performance Java-based backend services for real-time charging and balance management. • Implemented integrations using Diameter Protocol for telecom charging systems. • Focused on JVM performance optimization and low-latency transaction processing. • Contributed to system stability, defect resolution, and production issue analysis. • Provided onsite support in Malaysia during critical customer deployments and go-live phases. • Collaborated with cross-functional teams to deliver reliable, production-grade telecom platforms.
Sterlite Tech
Jul 20132 yrs 7 mosJan 2016

On-site

Worked as a Junior Software Engineer in core development teams building telecom Online Charging System (OCS) platforms. Key Contributions: • Developed and enhanced backend components using Java and EJB on JBoss application server. • Assisted in building and maintaining REST and SOAP-based APIs for real-time charging and billing workflows. • Contributed to rating, and transaction processing modules under senior engineer guidance. • Supported performance benchmarking and load testing activities to validate system behavior under traffic. • Assisted in JVM monitoring and basic performance tuning tasks. • Participated in defect fixing, code reviews, and production issue analysis. • Collaborated with QA and senior engineers during releases and post–go-live stabilization.

Ronak’s AI Stack

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Education

Bachelor of Engineering (B.E.), Information Technology

Gujarat Technological Univerisity

20103 yrs2013

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Headline

Technical Architect | Digital Banking & Fintech | Cloud-Native & High-Performance Platforms | Scalable & Modern Platforms | Java & Microservices

About

Technical Architect with 12+ years of experience designing and delivering scalable, high-performance fintech and digital banking platforms. I specialize in Java-based microservices, cloud-native architecture, Active-Active high availability models, and performance-critical systems operating at scale (1000+ RPS / TPS). Over the years, I have led architecture and delivery for wallet platforms, charging systems, and digital banking products, modernizing legacy platforms into containerized, cloud-ready solutions using Kubernetes and Azure AKS. Currently, I am architecting a digital banking platform and driving Oracle-to-Java modernization initiatives, leveraging AI-assisted prompt engineering to accelerate delivery while ensuring functional parity, performance stability, and regulatory compliance. I have hands-on experience leading engineering teams, working directly with global clients, and delivering systems from architecture design through UAT and production go-live. My career focus is to grow into Principal Architect and technology leadership roles in fintech and digital banking.

Location

Ahmedabad

AI stack

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Work experience

Technical Architect at Bankai Infotech, Sep 2023 - Present · 3 yrs, Ahmedabad, Gujarat, India, Leading architecture, modernization, and delivery of large-scale fintech platforms across wallet, payments, and digital banking domains. Key Responsibilities & Impact: • Architecting cloud-native fintech platforms supporting wallets, ledgering, and payment processing at scale. • Leading modernization of legacy, database-centric systems into modular Java-based microservices architectures. • Driving containerization initiatives by transforming bare-metal deployments into Kubernetes-based, cloud-ready platforms. • Designing DB-agnostic architectures supporting Oracle and MySQL to enable flexibility and scalability. • Designing Active-Active, high-availability architectures to ensure zero-downtime financial systems. • Leveraging AI-assisted prompt engineering to accelerate refactoring, validation, and delivery timelines while maintaining functional parity and compliance. • Leading backend engineering teams (4+ members) with focus on architecture governance, code quality, and delivery excellence. • Collaborating with product, QA, and operations teams for UAT, performance benchmarking, and production go-lives. International Client Engagement (Indonesia Client): • Led architecture and backend delivery for a high-performance fintech wallet charging platform for a major client in Indonesia. • Replaced legacy ledgering engine with a high-throughput, API-driven backend. • Achieved 1200+ RPS through JVM tuning and system-level optimization. • Designed Active-Active high-availability deployment eliminating single points of failure. • Led onsite UAT execution and customer sign-off in Indonesia, acting as architecture owner and client communication SPOC.

Technical Lead at Panamax Inc., Apr 2022 - Sep 2023 · 1 yr 6 mos, Ahmedabad, Gujarat, India, Led backend engineering teams for large-scale fintech wallet and payment platforms. Key Contributions: • Designed and implemented microservices-based backend systems using Java and Spring Boot. • Owned and coordinated critical business modules including wallet operations, ledgering, charging, and transaction workflows. • Improved system scalability and reliability for high-volume financial and non-financial transactions. • Worked closely with architects to evolve platform design toward cloud-native and high-availability models. • Led code reviews, mentored engineers, and enforced engineering best practices. • Coordinated with QA and DevOps teams for release planning, production support, and performance tuning. • Played a key role in international customer deployments and stabilization activities.

Sr software Engineer at Panamax Inc., May 2017 - Apr 2022 · 5 yrs, Ahmedabad, Gujarat, India, Worked as a core backend engineer on large-scale fintech wallet, payment, and transaction processing platforms. Key Contributions: • Designed and developed backend services using Java and Spring Boot for wallet and transaction processing systems. • Designed and implemented a Finite State Machine (FSM)–based orchestration framework to manage configurable financial workflows and business rule execution. • Contributed to core modules including wallet operations, ledgering, charging, and balance management. • Developed REST-based APIs for financial and non-financial transaction flows. • Integrated asynchronous processing and messaging to support transaction lifecycle management. • Focused on performance optimization, defect resolution, and production issue analysis. • Collaborated with senior engineers and architects on system design and platform enhancements. • Supported production deployments and post–go-live stabilization activities.

Software Engineer at Sterlite Tech, Jan 2015 - May 2017 · 2 yrs 5 mos, Worked as part of core engineering teams building telecom Online Charging System (OCS) platforms for real-time billing. Key Contributions: • Developed high-performance Java-based backend services for real-time charging and balance management. • Implemented integrations using Diameter Protocol for telecom charging systems. • Focused on JVM performance optimization and low-latency transaction processing. • Contributed to system stability, defect resolution, and production issue analysis. • Provided onsite support in Malaysia during critical customer deployments and go-live phases. • Collaborated with cross-functional teams to deliver reliable, production-grade telecom platforms.

Jr Software Engineer at Sterlite Tech, Jul 2013 - Jan 2016 · 2 yrs 7 mos, On-site, Worked as a Junior Software Engineer in core development teams building telecom Online Charging System (OCS) platforms. Key Contributions: • Developed and enhanced backend components using Java and EJB on JBoss application server. • Assisted in building and maintaining REST and SOAP-based APIs for real-time charging and billing workflows. • Contributed to rating, and transaction processing modules under senior engineer guidance. • Supported performance benchmarking and load testing activities to validate system behavior under traffic. • Assisted in JVM monitoring and basic performance tuning tasks. • Participated in defect fixing, code reviews, and production issue analysis. • Collaborated with QA and senior engineers during releases and post–go-live stabilization.

Education

Bachelor of Engineering (B.E.), Information Technology, Gujarat Technological Univerisity