Masumi Upadhyay

Full Stack Software Engineer | React.js | Node.js | MongoDB | TypeScript

Talent

AhmedabadMember since 17 May 2026

node.jsreactjsfull stack developerpostgresqlmongodbecommerce consultanttypescriptExpress.jsmysqlreduxapi developermern stack developererp implementationci/cd pipelinesJenkinsagile

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About

Full Stack Software Engineer with 5.5+ years of experience building scalable MERN stack and eCommerce applications using MongoDB, Express.js, React.js, Node.js, and TypeScript.

Experienced in developing ERP systems, Shopify applications, REST/GraphQL APIs, and enterprise-grade backend services with a strong focus on performance, scalability, and user experience.

Skilled in frontend architecture, API integrations, authentication systems (JWT/OAuth), CI/CD workflows, and Agile product development. Passionate about building reliable, production-ready software and solving complex engineering challenges in fast-paced environments.

Experience

Senior Software Engineer | Sigma Infosolutions | Apr 2025 – Present

Developed scalable backend services and REST APIs using Node.js and Express.js for ERP and eCommerce platforms.
Built enterprise frontend applications using React.js, TypeScript, and Redux Toolkit.
Developed Shopify applications including subscriptions, one-day delivery, and click & collect integrations.
Integrated third-party APIs and ERP systems for real-time inventory and order synchronization.
Designed MongoDB schemas and optimized API performance for high-volume transactional systems.
Implemented JWT-based authentication and role-based authorization systems.
Contributed to CI/CD pipelines, Dockerized deployments, and production monitoring workflows.
Mentored junior developers and participated in architecture discussions and code reviews.

Software Engineer / Associate Software Engineer | Sigma Infosolutions | Sep 2020 – Mar 2025

Developed and maintained enterprise commerce platforms and backend services using Node.js, REST APIs, MongoDB, and PHP.
Built automation workflows for inventory, order management, and third-party integrations.
Improved system reliability, application performance, and production stability through optimization and debugging.
Collaborated with frontend, QA, and DevOps teams for successful product releases and deployments.
Participated in API design, backend architecture planning, and production issue resolution.