Full-Stack Software Engineer with AWS Expertise

Kunal Babbar

Software Engineer

Harrison, NJ, USA **************@*****.*** +1-929-***-**** LinkedIn Github SUMMARY

Software Engineer with around 4 years of experience building and supporting scalable, secure full-stack applications across fintech, enterprise, and corporate banking domains. Strong expertise in Java backend development, RESTful APIs, and cloud- native deployments on AWS, complemented by frontend experience with React and TypeScript. Proven ability to implement secure transaction workflows, optimize CI/CD pipelines, and improve system reliability, performance, and release velocity in regulated, high-availability environments.

CORE SKILLS

Programming Languages: Java, JavaScript, TypeScript, SQL, HTML, CSS Frameworks: Spring Boot, Spring MVC, RESTful Web Services, Service Layer Architecture, React.js, Node.Js, Express.Js, Redux, Bootstrap, GraphQL

API & Integration: RESTful API Design, API Integration, OAuth-Based Secure APIs, JSON Databases: PostgreSQL, MySQL, MongoDB, NoSQL

Messaging & Event Processing: Apache Kafka, Event Driven Architecture, Asynchronous Processing Cloud: AWS (EC2, S3, RDS, CloudWatch, CloudTrail)

DevOps: Jenkins, Docker, Kubernetes, CI/CD Pipelines, Environment Configuration Management Security & Access Control: Authentication & Authorization, Role-Based Access Control (RBAC), Secure Data Exchange, API Security

Testing & Quality Engineering: JUnit, Selenium, Burp Suite, Nessus, Qualys, Automated Testing, Regression Testing, Performance Tuning

Methodologies: Agile Development, Code Reviews, SDLC, Cross-Functional Collaboration, Requirement Analysis Other Tools: Git, Github, Github Actions, Visual Studio, Jira, Eclipse, Kali, Nmap PROFESSIONAL EXPERIENCE

Juegos AI lab Software Engineer USA Sep 2025 – Present

● Built responsive frontend interfaces using React and TypeScript to surface account balances, transaction statuses, and treasury insights, improving usability and real-time visibility for corporate users.

● Architected and maintained the backend for a multi-platform event management application hosted on AWS, leveraging Lambda, Cognito, DynamoDB, SNS, and Redshift for serverless compute, authentication, messaging, and analytics.

● Implemented GraphQL APIs and service layer business logic to integrate corporate platforms with downstream settlement, reporting, and analytics systems, ensuring consistent data flow and regulatory compliance.

● Applied authentication, authorization, and role-based access control (RBAC) across backend and frontend layers to govern access to corporate accounts, transaction approvals, and administrative functions in line with financial security standards.

● Integrated multiple third-party APIs, including Google Maps, OpenStreetMap (OSM), and Stripe, along with custom endpoints for scheduling and event coordination.

● Designed and optimized DynamoDB data models with conditional writes, optimistic concurrency control, and high throughput access patterns; implemented DynamoDB Streams–powered Lambda triggers for real time processing, fan out workflows, and cross service event propagation.

● Integrated Apache Kafka for event-driven processing of payment updates and transaction notifications, improving system decoupling and reliable handling of high-volume financial events.

● Established CI/CD pipelines using Git, Docker, and Kubernetes to automate build, test, and deployment processes, reducing release cycle time by 15% and improving deployment reliability across environments. Ernst and Young Software Engineer India Jun 2021 – Aug 2023

● Built and maintained responsive enterprise web applications using HTML5, CSS3, JavaScript, and React, integrating with Java and Spring MVC microservices to support secure internal workflows and cross-browser user experiences.

● Collaborated with backend and cloud teams working on Java-based services deployed on AWS (EC2, S3, RDS), supporting API integrations, environment validation, and smooth communication across internal platforms.

● Participated in 20+ design and code reviews using Git based workflows to uphold coding standards, reduce technical debt, and improve performance across UI components and backend-integrated features.

● Implemented and validated application security controls across UI and REST API touchpoints, strengthening secure data exchange with OAuth between frontend components and backend services and reducing exploitable vulnerabilities by 30%.

● Worked closely with Product Managers and QA teams to clarify requirements, define test plans, and automate testing for features spanning frontend logic and backend APIs, accelerating release cycles by 10%.

● Monitored production metrics and resolved live issues using AWS CloudWatch, coordinating with backend teams to address performance, security, and accessibility issues and ensure stable end-to-end application behavior. JP Morgan Chase Software Engineer Intern India Aug 2020 – Feb 2021

● Assisted in building backend service features using Spring MVC and REST APIs to support internal financial workflows such as data retrieval, validation, and transaction-related processing.

● Developed and integrated RESTful APIs to connect frontend interfaces with backend services, supporting secure data exchange and consistent behavior across internal applications used by finance and operations teams.

● Contributed to cloud-based application environments on AWS by supporting deployments, configuration management, and version control using Git, gaining hands-on exposure to enterprise-scale delivery pipelines and regulated financial systems.

● Implemented automated testing and performance tuning across backend APIs and UI components using JUnit and Selenium, reducing regression risk under high corporate transaction volumes.

● Integrated MySQL and NoSQL databases, using PostgreSQL for transactional data and MongoDB for flexible reporting metadata, ensuring data integrity and efficient retrieval across financial workflows.

● Implemented automated testing and performance tuning across backend APIs and UI components using JUnit and Selenium, reducing regression risk under high corporate transaction volumes. EDUCATION

New Jersey Institute of Technology, Newark, NJ, USA Sep 2023 – May 2025 Master of Science in Computer Science

University of Petroleum and Energy Studies, Dehradun, India Aug 2017 – May 2021 Bachelor of Science in Computer Science

PROJECTS

Capstone Project: Energy Market Lab – Common Transactive Services (EML-CTS)

● Designed and developed a Spring Boot backend for real-time energy trading, integrating RESTful APIs with quote-driven market mechanisms.

● Implemented dynamic transaction workflows (quote creation, acceptance, cancellation), enabling secure, scalable data exchanges.

● Followed Agile methodology and performed iterative code reviews to meet performance and reliability targets for the 2024 EML-CTS draft standard.

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