# Payal Zanwar > Senior Software Engineer at Cumulus Digital Systems Location: Boston, Massachusetts, United States Profile: https://flows.cv/payal Hey there, I'm Payal. Thank you for visiting my profile. ☺️ Here are a few words about my background, I work as a Senior Software Engineer at a startup company called CumulusDS. I build software to digitalize manual work that is mission-critical, high-volume, and difficult to automate. Here, at CumulusDS, I work on a cross-platform React Native mobile app/ web app that improves the quality and productivity of safety-critical workflows and is used to configure and visualize work activities across a wide range of industries. 🏆 Recognition I have a patent pending for creating software "Cumulus Workflow" that is used to build intuitive workflows to guide workers through mission-critical work activities. 👩🏻‍💻 Technical Skills ▪️Programming Languages: Java, Javascript, Node JS, GraphQL ▪️Frameworks/Libraries: React, React Native, Redux, AngularJS, Express, Apollo Client, RN Testing Library ▪️Cloud Services: AWS Lambda, SQS, SNS, CloudWatch, API Gateway, S3, Cloud Formation, CloudFront, Cognito, Athena ▪️Databases: SQL, DynamoDB, MongoDB ▪️Monitoring/CI Platforms: Amazon CloudWatch, GitHub Actions, Circle CI ▪️End-To-End UI Testing Framework: Detox, Cypress, Cucumber, Appium, Webdriver IO ▪️Software Tools: Xcode, GitHub, Postman, SOAPUI, IBM MQ, Toad, My SQL Developer ## Work Experience ### Senior Software Engineer @ Cumulus Digital Systems Jan 2022 – Present • Designed and implemented beta to release version of micro front-end React application called Workflow Builder that manages industrial workflows. • Led a team by designing backend architecture that focuses on techniques like caching, paginated queries, and transaction builders on databases with global secondary indexes. Leveraged AWS resources and services. • Built an API for processing and transforming workflow configurations into an actionable user experience for web and mobile applications. Designed React hooks for fetching relevant queries for each app and for smart tools integration with Mobile UX. • Wrote unit tests using jest and React Native Testing Library for mobile app features. • Mentored interns on projects like developing Javascript Athena connector that allows SQL queries on DynamoDB. This project helped us in generating operational reports for each customer. ### Software Engineer @ Cumulus Digital Systems Jan 2020 – Jan 2022 • Led a team that developed time limited binding code backend feature that let only authorized users log in. This feature added more security to the system and was also beneficial to release the app to the public app store. • Led a team to create new backend services that migrated from C# monolithic architecture to JS microservices. Changed our architecture to adopt GraphQL queries and mutation instead of REST APIs for performance benefits. • Onboarded and mentored a junior software engineer on her several backends and front-end projects. Her projects involved improving the performance of the backend system, and developing UI features for mobile app that included pagination and caching queries. • Systematically resolved and triaged production problems by fixing data using scripts and redriving AWS dead letter queues. • Improved engineering standards across all multi-tenant services by creating a library that handles all general-purpose hooks/AWS functions. Using this library not only made all the services have consistent behavior but also reduced alarms by 60%. ### Software Engineering Intern @ Cumulus Digital Systems Jan 2019 – Jan 2019 | Cambridge, Massachusetts • Implemented features for a web application like Uploading/Downloading Files, adding Zendesk (Support) Widget, Search Bar with filters using React and Redux. • Collaborated with UX designer to develop mobile applications for the company's smart IoT products using React-native (RN 0.59.9) with scanning Bluetooth devices, log in using QR code, changing the configuration of connected BLE devices being the key components of it. • Developed software to upload/download files in a Function as a Service (FaaS) framework for the microservice architecture using AWS Lambda. Deployed using Amazon CloudFront. • Built new service for maintaining a history of activities using AWS Kinesis stream for sequential output of messages. • Used AWS AppSync that interfaces with GraphQL for accessing data in offline mode for mobile applications. • Wrote End-to-End integration and unit tests using Appium with WebdriverIO for both IOS and Android app. • Wrote scripts for continuous integration and deployment using Circle CI and Github Actions. • Back-end work included DevOps details to help with capacity planning, error annunciation, and reliable operation. • Developed Javascript software using type-checking. • Gave and received code reviews to maintain consistency in application with the best coding practices. ### Software Engineer @ Cognizant Jan 2016 – Jan 2018 | India • Collaborated with BA and clients about the scope of the project, it’s quality analysis, requirement, and development. • Reduced time to transfer data between two applications from 6 hours to 20 minutes by developing interfaces in ESQL. • Developed message flows by configuring ESQL compute node, DB nodes, SOAP node, File and MQ nodes. • Built API proxies using APIGEE platform for mapping the fields of the request that interacts with backend services of the interfaces that in turn connects to Salesforce Cloud. • Worked on SOA and ROA interfaces that required REST API calls and Asynchronous JS. • Created shell scripts for the jobs, that pulled the data from the database which gets converted into a message input. • Tracked all business fields passing from one application to another through Splunk monitoring software. • Sandbox was used as the repository to store all applications which were deployed through Jenkins. ### Programmer Analyst Trainee @ Cognizant Jan 2015 – Jan 2016 | India • Developed HealthCare portals using JavaScript, HTML5, CSS3 for doctors to monitor reports of patients and for users to book doctor’s appointment and view their own reports. • Web applications were designed using Data Access Object (DAO) Design Pattern. ### Project Intern @ Persistent Systems Jan 2014 – Jan 2015 | India During this period I worked on "Secure Data De-Duplication" project using Java, JSP, MySQL Database and Glassfish Server. Purpose of this project is to avoid storage of redundant data into databases. • Developed a Java application which was used to improve storage efficiency of files using JSP, Servlets, HTML5 and CSS3. • This application was designed using Data Access Object (DAO) design pattern to implement it on various file formats like docx, txt and pdf and was deployed on Glassfish Server. • Encryption/Decryption was done using SHA-256 algorithm for securing the data which was stored on cloud only if the generated hash value doesn't match with any file previously stored on cloud. ## Education ### Master of Science in Information Systems in Information Technology Northeastern University Jan 2018 – Jan 2020 ### Bachelor of Engineering - BE in Computer Engineering Sinhgad College of Engineering Jan 2011 – Jan 2015 ## Contact & Social - LinkedIn: https://linkedin.com/in/payal-zanwar --- Source: https://flows.cv/payal JSON Resume: https://flows.cv/payal/resume.json Last updated: 2026-03-22