Summary
Overview
Work History
Education
Skills
Timeline
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HARI CHANDANA CHALLAGOLLA

Arlington,USA

Summary

  • Full Stack Developer with over 6 years of experience in designing and implementing innovative software solutions.
  • Implemented multifactor authentication (MFA) using machine learning to detect unusual logins, enhancing security.
  • Developed event-driven microservices using Apache Kafka and Cassandra for high-throughput payment systems.
  • Proficient in backend and frontend technologies, including Java with Spring Boot, Python, Angular, and React.
  • Led the revamp of e-commerce platforms, improving performance, scalability, and user engagement.
  • Expert in microservices architecture with Spring Boot, optimizing application modularity and deployment processes.
  • Engineered data extraction, transformation, and loading (ETL) processes for machine learning applications.
  • Collaborated within shared services teams to develop common services across the commercial banking domain.
  • Advocated for Agile methodologies and championed CI/CD pipelines, improving software delivery and deployment efficiency.
  • Experienced in DevOps practices, managing CI/CD pipelines and automating infrastructure provisioning with Docker, Kubernetes, and Terraform.
  • Integrated advanced security protocols, including OAuth2 and JWT for authentication and authorization in application interfaces, ensuring robust data security and compliance with regulatory standards.
  • Optimized system performance and reliability, using monitoring tools like Prometheus and ELK Stack to provide real-time insights into application health and proactively address potential issues.
  • Spearheaded the transition to cloud-native architectures, leading efforts to migrate legacy systems to cloud environments, significantly reducing operational costs and improving scalability.
  • Conducted extensive code reviews and mentored junior developers, fostering a culture of quality and continuous improvement within the development team.
  • Led cross-functional teams in high-stakes project environments, effectively communicating between technical teams and stakeholders to align project objectives with business goals, resulting in a 20% increase in project delivery efficiency.

Overview

6
6
years of professional experience

Work History

Software Engineer

7-11
01.2023 - Current
  • As part of the 7-Eleven digital transformation initiative, the focus was on building a scalable, event-driven architecture to support real-time data streaming and microservices for their growing e-commerce platform
  • The objective was to enhance customer experience by enabling real-time order tracking, inventory updates, and personalized offers based on user activity
  • Design: Architected and developed scalable microservices using Java and Spring Boot, integrated with Kafka for real-time data streaming and event-driven architectures to handle millions of daily transactions
  • Implementation: Implemented RESTful APIs using Python and Flask, facilitating seamless integration between microservices and external systems while ensuring secure data exchange
  • Deployment: Led the deployment of Java-based microservices on AWS, utilizing services such as EC2, S3, and Lambda to ensure high availability, fault tolerance, and scalability across the platform
  • Automation: Designed and implemented a CI/CD pipeline with Jenkins, GitLab CI, and Docker, automating the build, test, and deployment processes, which streamlined backend services delivery and reduced manual intervention
  • Security: Enhanced data security by integrating AES 256-bit encryption into RESTful APIs, ensuring compliance with industry standards and safeguarding sensitive customer and transaction data
  • Data Streaming: Developed and optimized Kafka producers and consumers in Java, processing millions of messages daily to support high-throughput applications such as real-time inventory management and dynamic pricing models
  • Integration: Integrated Kafka with AWS services such as Kinesis and S3, allowing real-time data ingestion, storage, and analysis for analytics and machine learning-driven personalization efforts
  • Backend Services: Built and maintained robust backend services using Spring Boot and Hibernate, ensuring transactional integrity and seamless scalability across distributed systems
  • Access Control: Utilized AWS IAM for managing secure access to cloud resources, implementing least-privilege principles to safeguard critical infrastructure and ensure compliance with security policies
  • Continuous Deployment: Automated the deployment of microservices on Kubernetes, ensuring consistent and repeatable deployments across various environments (development, staging, production)
  • Scripting: Developed Python scripts to automate data processing tasks within the CI/CD pipeline, reducing manual intervention and improving overall efficiency
  • Authentication: Implemented JWT-based authentication and authorization in RESTful services, strengthening security measures across microservices and improving user management
  • Performance Tuning: Optimized Kafka clusters for performance, reducing latency and improving message throughput by fine-tuning configurations and upgrading hardware as necessary
  • Monitoring: Established comprehensive logging and monitoring solutions using the ELK Stack and Prometheus, providing insights into application health, performance, and enabling proactive issue resolution
  • Collaboration: Collaborated with cross-functional teams to design and implement microservices, focusing on scalability, fault tolerance, and disaster recovery strategies, ensuring robust operations for 7-Eleven's platform

Software Engineer

Fidelity Investments
Dallas, TX
08.2020 - 12.2023
  • As part of Fidelity Investments' initiative to streamline document management, the focus was on integrating DocuSign to enable seamless electronic signatures, improving document workflows and transaction processing efficiency
  • E-Signature Solution Development: Architected and developed a secure e-signature solution using DocuSign, enabling seamless digital signing of documents for customers and internal stakeholders, reducing manual paperwork and processing time
  • Backend Integration: Integrated DocuSign with Fidelity's backend systems using Java and Spring Boot, enabling automatic document generation, signing, and tracking
  • Ensured secure and reliable data exchange between microservices and DocuSign's API
  • API Development: Developed RESTful APIs in Spring Boot to enable secure interaction between the e-signature platform and external systems, facilitating real-time status updates, document retrieval, and notifications
  • Event-driven Architecture: Designed event-driven microservices using Apache Kafka to handle real-time document processing, ensuring efficient data flow between different components and timely execution of signing workflows
  • Data Security: Implemented robust security measures, including OAuth2 for authentication and AES 256-bit encryption to protect sensitive document data, ensuring compliance with industry standards
  • Automation: Automated e-signature workflows, including document preparation, signature requests, and completion notifications, improving operational efficiency and user experience
  • Monitoring and Logging: Established a comprehensive monitoring and logging system using the ELK Stack, providing real-time insights into e-signature operations and enabling rapid troubleshooting of issues
  • Transaction Processing Optimization: Optimized the document signing process, improving transaction handling speed by 20%, reducing delays, and enhancing the overall user experience
  • Collaboration: Worked closely with cross-functional teams to ensure smooth integration of DocuSign with Fidelity's internal systems and workflows, aligning the e-signature solution with business objectives
  • Compliance and Auditability: Ensured compliance with financial and regulatory requirements by implementing detailed audit logs and ensuring all signed documents were securely stored and traceable

Software Developer

Infosys Ltd.
06.2018 - 07.2020
  • Collaborative Service Development: Collaborated within a shared services team dedicated to developing common services across the commercial banking domain, ensuring architectural and design consistency in microservices
  • This included innovative document storage and retrieval systems incorporating applied machine learning and algorithms for enhanced performance
  • Agile and TDD Practices: Engaged in the development of microservices by adhering to the Agile Scrum methodology and embracing Test-Driven Development (TDD) practices, which contributed to the delivery of high-quality, reliable services
  • Engineered Shared Services: Engineered shared services designed to support internal applications in storing and processing documents efficiently, utilizing RESTful services for seamless integration and operations
  • Comprehensive Testing: Created detailed test requirements through the decomposition of functional requirements, in collaboration with end-users, business analysts, and developers, to ensure comprehensive coverage and quality assurance
  • Technical Solutions Implementation: Designed and implemented technical solutions leveraging Angular 6, React, microservices, Spring Boot, Java, and web services, which facilitated comprehensive end-to-end testing to validate functionalities and performance
  • Innovative OCR Solutions: Innovated optical character recognition (OCR) solutions capable of extracting data from images and PDF documents, significantly reducing human error rates in document processing by 90%
  • CI/CD Pipeline Integration: Played a pivotal role in the integration of continuous integration/continuous deployment (CI/CD) pipelines, enhancing the development lifecycle and enabling faster release cycles with reduced deployment risks
  • Security Best Practices: Implemented security best practices in the development of microservices, ensuring the secure handling of sensitive data and compliance with industry standards and regulations
  • Knowledge Sharing: Actively participated in code reviews and knowledge-sharing sessions, fostering a culture of learning and continuous improvement within the development team
  • Scalable Infrastructure Development: Developed scalable infrastructure solutions to handle increasing data loads, ensuring system reliability and performance during peak transaction periods, which resulted in a 30% improvement in system uptime
  • Performance Optimization: Conducted performance tuning and optimization for backend services, leading to a 25% reduction in response times and enhancing user experience across various applications
  • Cross-Functional Collaboration: Worked closely with cross-functional teams, including product managers, UX designers, and QA engineers, to deliver features that align with business objectives and user needs, resulting in a 20% increase in feature adoption rates
  • Advanced Data Analytics: Utilized advanced data analytics to monitor system health and performance, proactively identifying and resolving bottlenecks and issues, which led to a 15% decrease in system outages and service interruptions

Education

Master of Science - Information Technology

Trine University
Detroit, MI

Bachelor of Science - Computer Science

DVR & Dr.HS MIC College of Technology
Vijayawada, India

Skills

  • Java
  • Java/Springboot
  • SQL/NoSql
  • CI CD/Jenkins/Gitlab
  • AWS/Azure
  • TypeScript/Node
  • Microservices/Restful Services
  • Kafka/Message Queues
  • Production Support/Grafana/Appdynamics/Splunk

Timeline

Software Engineer

7-11
01.2023 - Current

Software Engineer

Fidelity Investments
08.2020 - 12.2023

Software Developer

Infosys Ltd.
06.2018 - 07.2020

Master of Science - Information Technology

Trine University

Bachelor of Science - Computer Science

DVR & Dr.HS MIC College of Technology

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HARI CHANDANA CHALLAGOLLA