Senior Software Engineer Backend, AWS & Microservices

Chandrasekhar GK

*****************@*****.*** +1-469-***-****

Summary

Software Engineer with over 5+ years of experience building scalable, secure, and high-performance web applications using Django, Flask, FastAPI, and ReactJS. Skilled in developing microservices and serverless solutions on AWS with CI/CD automation using Jenkins, GitHub Actions, Docker, and Kubernetes. Experienced in AI-driven automation and ETL pipeline design using Pandas, LLMs, and OCR. Strong collaborator in Agile teams with a proven record of optimizing backend performance and reducing API latency by 40%.

Professional Work Experience

Client: Citi Bank Associate Software Engineer Irving, TX June 2024 - Present

oDeveloped microservices using Flask and FastAPI for real-time banking workflows.Built frontend features using ReactJS for dashboard components, notifications, and transaction tracking modules.

oIntegrated backend services with PostgreSQL hosted on AWS RDS, optimizing queries. Used AWS Lambda to run serverless functions handling triggers for secure notifications via AWS SNS.

oCreated CI/CD pipelines in Jenkins for backend and frontend repositories. Managed Docker containers and deployed services to Kubernetes clusters.

oEnforced authentication and authorization using OAuth2 and JWT tokens across endpoints. Used Pandas to preprocess user activity logs and feed data into reporting dashboards in ReactJS.

oBuilt a notification system combining Web Sockets and serverless APIs to deliver real-time alerts. Used S3 for encrypted file storage and secure access control through pre-signed URLs.

oImplemented frontend API using Axios and Redux to manage global app state and error handling. Participated in daily Agile ceremonies, pair programming sessions, and sprint demos with business stakeholders. Conducted thorough unit tests with PyTest and integrated functional tests for REST endpoints using Postman collections. Assisted DevOps in setting up CloudWatch monitoring, logging, and failure alerts for API health.

Environment: Python, Flask, FastAPI, ReactJS, PostgreSQL, AWS Lambda, AWS RDS, AWS SNS, S3, Jenkins, Docker, Kubernetes, OAuth2, JWT, Pandas, WebSockets, Axios, Redux, CloudWatch

Company: Cybermate InfoTech Ltd Software Engineer Hyderabad, India Nov 2021 – June 2023

oBuilt REST APIs for credit scoring and financial asset systems used by Experian. Implemented LLM-based solutions for field-wise data extraction, enhancing accuracy and efficiency in data processing.

oUtilized OCR techniques to extract data by integrating open-source OCR library and home-grown OCR solution. Trained NLP models on customized dataset using Transformer models using Hugging face.

oBuilt APIs using Django FAST API to connect between systems for file transfer. Prepared datasets having more than 10 features for NLP model training for different modules.

oImplemented user-interactive UI enhancements based on customer requirements, improving user experience and engagement.

oDesigned and deployed cloud solutions leveraging AWS Lambda, EC2, RDS, and S3 for secure, scalable workloads

oApplied AI-assisted development with LLMs and OCR pipelines to automate field-level data extraction, improving accuracy and efficiency

Environment: Python, Django, FastAPI, NLP, Hugging Face Transformers, OCR, LLMs, REST API, AWS Lambda, EC2, RDS, S3, Pandas, SQL

Company: N Infosoft Pvt. Ltd Software Developer Hyderabad, India Jan 2020 – Oct 2021

oCreated backend APIs using Flask for financial data scraping, tagging, and analytics dashboard features.

oScraped structured and unstructured data using Beautiful Soup and parsed it into normalized formats using Pandas.

oManaged NoSQL and relational data in DynamoDB and PostgreSQL, writing ETL scripts to sync both systems. Developed ReactJS frontends for admin interfaces and audit logs with interactive table components.

oBuilt validation pipelines to clean data using Pandas and log anomalies with JSON reports for QA. Used AWS Lambda to execute daily ETL tasks and orchestrate file syncs from public repositories. Integrated Bootstrap for responsive layouts and implemented role-based view restrictions using JWT.

oDeployed services using EC2 and Elastic Beanstalk and monitored logs via AWS CloudWatch. Supported UAT testing and documented endpoints using markdown, Postman, and Confluence.

Environment: Python, Flask, Pandas, Beautiful Soup, ReactJS, Bootstrap, PostgreSQL, DynamoDB, AWS Lambda, EC2, Elastic Beanstalk, CloudWatch, JWT, Postman, Confluence

AI/ML Research Assistant(Southern Arkansas University) Jan 2024 - Mar 2024

oFinancial Time-Series Forecasting Platform

oScalable Multimedia Recommendation System

Technical Skills

oLanguages: Python, JavaScript, SQL

oBackend: Flask, Django, FastAPI, GraphQL, REST APIs

oTechnologies & Frame works: Pandas, NumPy, Seaborn, Matplotlib, Streamlit, Beautiful Soup, Scikit-learn, Keras, NLTK, SpaCy, TensorFlow, PyTorch

oFrontend: ReactJS, HTML5, CSS3, Bootstrap, Redux

oDatabases: PostgreSQL, MySQL, MongoDB, DynamoDB

oCloud & DevOps: AWS (Lambda, S3, EC2, RDS, SNS), Docker, Jenkins, Git, Kubernetes

oData Tools: Pandas, BeautifulSoup, Celery, RabbitMQ

oTesting: PyTest, Postman, Selenium, React Testing Library

oTools: GitHub, Bitbucket, Jira, Swagger, VS Code

Master’s in computer science - Southern Arkansas University 2025

Certifications

oAWS Certified Cloud Practitioner – AWS (2020)

oPython for Everybody – Coursera (2018)

oJavaScript for Web Development – Udemy (2019)

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