Available to hire
Hi, I’m Soumyajit Sarkar, an experienced Full Stack Engineer with over 9 years of building scalable and high-performance web applications. I enjoy architecting complex frontend solutions using technologies like React, Angular, Next.js, and Vue, while also delivering robust backend services utilizing Node.js, Go, Python, Java, and .NET. I’m passionate about clean architecture, performance optimization, and delivering seamless user-centric digital experiences.
Throughout my career, I’ve led cross-functional teams and mentored junior developers, working closely with product managers and UX designers to meet business goals and enhance usability. I thrive in collaborative environments, always eager to explore emerging technologies and contribute to innovative projects, including AI-powered features and GenAI initiatives.
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Language
English
Fluent
Javanese
Advanced
Work Experience
Staff Software | Full Stack Engineer at Walmart Global Tech
July 1, 2019 - June 23, 2024Led a cross-functional team of 8 engineers across Web, iOS, and Android platforms overseeing end-to-end project delivery. Architected scalable React-based frontends driving a 40% increase in conversion rate and 25% reduction in bounce rates. Developed backend services with Go, Python, Java, and C#/.NET focusing on scalability and performance. Built and optimized RESTful and GraphQL APIs ensuring low-latency responses. Enforced microservices with Docker, Kubernetes, and CI/CD pipelines improving deployment efficiency. Revamped UI collaborations leading to 35% rise in user engagement. Migrated to Next.js leveraging SSG and SSR for SEO and performance. Integrated Apollo Client for seamless GraphQL data management and contributed to AI-powered feature initiatives. Mentored junior developers and maintained high code quality through reviews.
Senior Frontend Engineer at Walmart Global Tech
May 1, 2021 - May 31, 2022Led development of reusable UI components and design systems across React, Angular, Next.js, and Vue.js frameworks ensuring product consistency. Worked on performant Node.js and GraphQL services enabling seamless frontend-backend integration. Mentored junior engineers, guided code reviews, and promoted best practices including testing and performance optimization. Collaborated with product managers and designers to deliver user-centric features using TypeScript and modern tooling. Championed frontend innovations and CI/CD improvements to boost developer productivity.
Front Engineer at Walmart Global Tech
July 1, 2019 - May 1, 2021Developed and maintained React and Redux-based customer-facing features used by millions weekly. Led feature development from conception to deployment ensuring alignment with product goals. Collaborated closely with product, design, and backend teams to build elegant user-focused solutions. Authored unit and integration tests using Jest and Enzyme achieving high test coverage. Optimized app performance via component architecture and state management best practices. Participated actively in code reviews and knowledge-sharing.
Software Development Engineer II at IBM
March 1, 2018 - July 1, 2019Created internal monitoring dashboards with React, Redux, and TypeScript improving operational visibility and response times. Developed modular UI components following IBM's design and accessibility standards. Integrated RESTful APIs and WebSocket services for real-time metrics. Collaborated with UX designers and product teams to create intuitive interfaces. Published reusable React hooks and HOCs to reduce code duplication. Executed automated testing ensuring high coverage and stable CI/CD. Built backend Node.js services and deployed applications in Kubernetes clusters. Engineered real-time applications including chat and video systems using WebRTC and WebSockets. Drove large-scale application improvements used globally and enabled real-time communication features, reducing latency by 50%. Conducted code reviews and enforced coding standards.
Software Engineer at Uptake
October 1, 2016 - March 1, 2018Expanded scalable web applications with JavaScript, React, and Redux focusing on robust UI. Architected a real-time notification system using Node.js and Kafka enabling instant client updates. Built micro-frontend apps using Hapi.js promoting modularity and team independence. Engaged in unit and integration testing using Enzyme, Mocha, Chai, and Sinon supporting TDD. Collaborated with backend engineers to integrate data pipelines and APIs. Participated in code reviews and sprint planning. Developed a Progressive Web Application with Angular increasing user engagement by 40%. Built CI/CD pipelines for Golang microservices automating deployment and reducing time-to-market.
Software Engineer at Oracle
March 1, 2016 - October 1, 2016Optimized Angular applications improving rendering pipeline and caching, boosting performance by 30%. Enhanced AngularJS app accessibility through ARIA attributes and keyboard support ensuring WCAG compliance. Collaborated with UX/UI designers to build intuitive user interfaces resulting in positive feedback and increased engagement. Migrated legacy websites to React modernizing front-end tech and increasing engagement by 30%. Enhanced reusable React component library utilized by multiple teams. Worked within Agile teams delivering high-quality software solutions on time.
Staff Software | Full Stack Engineer Full Stack |Tech Lead Manager at Walmart Global Tech
July 1, 2019 - June 25, 2024Led a cross-functional team of 8 engineers (2 Web, 3 iOS, 3 Android), overseeing end-to-end project delivery and driving alignment across product, design, and engineering. Architected and implemented a scalable React-based front end for a high-traffic e-commerce platform, resulting in a 40% increase in conversion rate and 25% reduction in bounce rates. Designed and executed backend services in Go, Python, Java, and C#/.NET, powering mission-critical features with a focus on scalability and maintainability. Built and optimized RESTful APIs and GraphQL endpoints. Enforced microservices architecture using Docker, Kubernetes, and CI/CD pipelines to improve deployment efficiency. Led UI revamp with Product Managers and UX Designers, boosting user engagement by 35%. Migrated from React to Next.js leveraging SSG and SSR for SEO and performance. Integrated GraphQL APIs using Apollo Client. Contributed to GenAI initiatives. Conducted code reviews and mentored junior developers.
Senior Frontend Engineer at Walmart Global Tech
May 1, 2021 - May 31, 2022Led development of robust reusable UI components and design systems across React, Angular, Next.js, and Vue.js. Played key role in Orchestration Layer Team, building performant services with Node.js and GraphQL. Mentored junior engineers and interns, conducted code reviews, and promoted best practices. Collaborated cross-functionally to translate requirements into user-centric features. Delivered high-performance, responsive, accessible frontend apps using TypeScript and modern tooling. Championed frontend best practices, performance optimization, testing strategies, and CI/CD integration. Evaluated and integrated emerging frontend technologies to improve workflows and maintainability.
Front Engineer at Walmart Global Tech
July 1, 2019 - May 31, 2021Developed and maintained customer-facing features used by millions weekly using React, Redux, and GraphQL. Led end-to-end feature development ensuring timely delivery aligned with product goals. Collaborated with Product, Design, and Backend teams to create user-focused solutions. Wrote unit and integration tests using Jest and Enzyme achieving high test coverage. Optimized application performance by implementing component architecture and state management best practices. Participated in code reviews and knowledge-sharing sessions to reinforce coding standards.
Software Development Engineer II at IBM
March 1, 2018 - July 1, 2019Designed and released internal monitoring dashboards using React, Redux, and TypeScript to improve operational visibility. Built modular UI components adhering to accessibility standards (WCAG 2.1) for consistent user experience. Integrated RESTful APIs and WebSocket for real-time updates on infrastructure metrics. Collaborated with UX designers and stakeholders to deliver intuitive UI. Published custom React hooks and HOCs to manage shared logic. Executed automated testing with Jest and React Testing Library maintaining stable CI/CD pipeline. Used Webpack, Babel, and ESLint to enforce coding standards. Provided backend services in Node.js and deployed applications in Kubernetes clusters.
Software Engineer at Uptake
October 1, 2016 - March 1, 2018Expanded scalable web applications focusing on frontend using JavaScript, React, and Redux. Architected real-time notification system with Node.js and Kafka enabling instant updates. Built micro-frontend applications promoting modularity across teams. Wrote unit and integration tests ensuring reliability and TDD practices. Integrated real-time data pipelines with backend engineers. Converted wireframes into responsive websites ensuring pixel-perfect implementation. Increased user engagement by 40% through Progressive Web Application development using Angular. Blended Golang with gRPC and Protocol Buffers to build scalable microservices, optimizing performance. Built CI/CD pipelines automating deployments reducing time-to-market.
Software Engineer at Oracle
March 1, 2016 - October 1, 2016Optimized Angular applications improving rendering and caching resulting in 30% performance increase. Enhanced accessibility in AngularJS applications (WCAG standards). Collaborated with UX/UI designers to create intuitive user interfaces leading to positive feedback. Migrated legacy website to React increasing user engagement by 30%. Enhanced reusable React component library used by multiple teams. Worked as part of Agile team collaborating cross-functionally to deliver high-quality software solutions on time.
Staff Software | Full Stack Engineer Full Stack | Tech Lead Manager at Walmart Global Tech
July 1, 2019 - June 25, 2024Led a cross-functional team of 8 engineers, overseeing end-to-end project delivery and aligning efforts across product, design, and engineering. Architected a scalable React-based frontend improving conversion rate by 40% and reducing bounce rates by 25%. Designed backend services using Go, Python, Java, and C#/.NET for mission-critical features, focusing on scalability and performance. Built and optimized RESTful and GraphQL APIs for low-latency data access. Enforced microservices architecture with Docker, Kubernetes, and CI/CD pipelines, improving deployment efficiency. Improved UI with UX collaboration, increasing engagement by 35% and reducing errors by 25%. Spearheaded migration to Next.js for SEO and performance benefits. Conducted code reviews and mentorship, promoting engineering best practices and quality standards.
Senior Frontend Engineer at Walmart Global Tech
May 1, 2021 - May 31, 2022Led development of reusable UI components and design systems using React, Angular, Next.js, and Vue.js, ensuring product consistency and scalability. Built performant services in Node.js and GraphQL for efficient data fetching and frontend-backend integration. Mentored junior team members, conducted code reviews, and promoted best practices in testing and performance optimization. Collaborated cross-functionally to deliver user-centric features and improved developer productivity with modern tooling. Championed frontend performance and CI/CD integration while evaluating emerging technologies to innovate workflows.
Front Engineer at Walmart Global Tech
July 1, 2019 - May 31, 2021Developed customer-facing features used by millions weekly, leveraging React, Redux, and GraphQL. Led feature development from design to deployment, collaborating with Product, Design, and Backend teams. Maintained high test coverage with Jest and Enzyme, and optimized application performance through component architecture, state management, and modular code. Participated in code reviews and knowledge-sharing sessions to uphold standards and continuous improvement.
Software Development Engineer II at IBM
March 1, 2018 - July 31, 2019Designed and released monitoring dashboards using React, Redux, and TypeScript, improving infrastructure visibility and response times. Built reusable UI components meeting IBM design and accessibility standards. Integrated RESTful APIs and WebSocket for real-time updates. Developed backend services in Node.js with secure credential management. Deployed applications on Kubernetes clusters in cloud-native environments. Created real-time chat, video, and dashboard applications using Node.js, React, WebRTC, and WebSockets to deliver interactive experiences. Conducted code reviews and enforced coding standards.
Software Engineer at Uptake
October 1, 2016 - March 1, 2018Expanded scalable web applications with JavaScript, React, and Redux, focusing on frontend performance and maintainability. Architected real-time notification systems using Node.js and Kafka. Developed micro-frontend apps with Hapi.js plugins for modularity. Wrote unit and integration tests supporting TDD. Collaborated with backend engineers on data pipelines and API integration. Increased user engagement by 40% designing a Progressive Web Application in Angular. Developed Golang microservices with gRPC and Protocol Buffers, improving latency and interoperability. Built CI/CD pipelines for Golang projects, automating deployment.
Software Engineer at Oracle
March 1, 2016 - October 1, 2016Optimized Angular applications improving performance by 30% through rendering pipeline and caching enhancements. Improved accessibility to meet WCAG standards. Collaborated with UX/UI designers to create intuitive AngularJS interfaces, increasing user engagement. Migrated legacy websites to React, boosting user engagement by 30%. Enhanced React component library used company-wide. Worked in Agile teams delivering high-quality software on schedule.
Education
Master's degree at University of Kansas
March 28, 2014 - March 10, 2016Bachelor's degree at West Bengal University of Technology, Kolkata
September 3, 2010 - March 12, 2014Master's Degree at The University of Kansas
January 1, 2014 - December 31, 2016Bachelor's Degree at West Bengal University of Technology, Kolkata
January 1, 2010 - December 31, 2014Master’s Degree at The University of Kansas
January 1, 2014 - December 31, 2016Bachelor’s Degree at West Bengal University of Technology, Kolkata
January 1, 2010 - December 31, 2014Master’s Degree at The University of Kansas
January 1, 2014 - December 31, 2016Bachelor’s Degree at West Bengal University of Technology, Kolkata
January 1, 2010 - December 31, 2014Qualifications
Developer Jumpstart Program Final Event (1st Prize)
January 16, 2019 - May 25, 2025IBM Call for Code (1st Prize)-California Region
January 22, 2019 - May 25, 2025IBM Call for Code (1st Prize)-California Region
July 19, 2018 - May 25, 2025Uptake Hackathon (1st Prize)
November 21, 2017 - May 25, 2025GraphQL with React: The Complete Developers Guide
May 1, 2020 - May 31, 2020IBM Developer Jumpstart – Practitioner
January 1, 2019 - December 31, 2019Ruby on Rails for Web Development
August 1, 2015 - August 31, 2015Learn and Understand AngularJS
February 1, 2016 - February 28, 2016Javascript:Understanding the Weird Parts
January 1, 2016 - January 31, 2016GraphQL with React: The Complete Developers Guide
May 1, 2020 - May 31, 2020IBM Developer Jumpstart – Practitioner
January 1, 2019 - January 31, 2019Ruby on Rails for Web Development
August 1, 2015 - August 31, 2015Learn and Understand AngularJS
February 1, 2016 - February 29, 2016Javascript: Understanding the Weird Parts
January 1, 2016 - January 31, 2016GraphQL with React: The Complete Developers Guide
May 1, 2020 - May 31, 2020IBM Developer Jumpstart – Practitioner
January 1, 2019 - January 31, 2019Ruby on Rails for Web Development
August 1, 2015 - August 31, 2015Learn and Understand AngularJS
February 1, 2016 - February 28, 2016Javascript: Understanding the Weird Parts
January 1, 2016 - January 31, 2016Industry Experience
Agriculture & Mining, Consumer Goods, Education, Gaming, Healthcare, Manufacturing, Life Sciences, Professional Services, Financial Services, Retail, Telecommunications, Software & Internet, Computers & Electronics, Media & Entertainment
Skills
Experience Level
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
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