Pradeep Singh, Developer in Lucknow, Uttar Pradesh, India
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Pradeep Singh

Verified Expert  in Engineering

Full-stack Developer

Lucknow, Uttar Pradesh, India

Toptal member since August 31, 2022

Expertise
Web DevelopmentFront-endFull-stackMERN StackSaaSServerlessDashboardArtificial IntelligenceJavaScriptReact.jsGitHubGitRedux
Bio

Pradeep is a highly skilled full-stack developer with 6+ years of experience building modern, user-friendly web applications. He has worked on projects that enhance performance, accessibility, and seamless user experiences. With a strong understanding of both front-end and back-end development, he ensures smooth functionality and efficient systems. Passionate about solving complex problems, Pradeep thrives in collaborative environments and delivers high-quality solutions.

Portfolio

Freelance Clients
React, JavaScript, Large Language Models (LLMs), TikZ, LaTeX, React Components...
HackerRank
React, React Native, AWS CLI, Node.js, Jest, Front-end, Docker, Storybook...
Bighead Technologies
React Native, Expo, JavaScript, WebStorm, Ubuntu, GitLab, HTML, CSS...

Experience

  • Full-stack Development - 6 years
  • Node.js - 6 years
  • Git - 6 years
  • REST - 6 years
  • React - 6 years
  • Redux - 6 years
  • JavaScript - 6 years
  • React Native - 4 years

Availability

Part-time

Preferred Environment

Ubuntu, Visual Studio Code (VS Code), MacOS, Cursor AI

The most amazing...

...solutions I've developed are four highly-rated eCommerce apps that integrate with various marketplaces and are live on the Shopify App Store.

Work Experience

LLM Trainer

2024 - 2025
Freelance Clients
  • Designed and implemented a React-based UI that dynamically generates Latex based graphs, enabling users to create LaTeX-compatible visualizations.
  • Optimized graph rendering performance by leveraging efficient state management and memoization techniques, reducing render times by 40% for complex graphs.
  • Integrated an interactive editor with real-time preview functionality, allowing users to edit, validate, and export TikZ Latex compatible code directly from the application, improving workflow efficiency.
Technologies: React, JavaScript, Large Language Models (LLMs), TikZ, LaTeX, React Components, Artificial Intelligence (AI), GitHub

Software Development Engineer II (SDE II)

2022 - 2025
HackerRank
  • Developed a portal for candidates to undertake real-time online hiring tests.
  • Helped the organization in smoothing the hiring process by applying candidate monitoring services using AI to judge whether candidates did perform the test without any plagiarism.
  • Led a team of two developers to build the system architecture for auto-scaling when the number of requests increased on the candidate portal.
Technologies: React, React Native, AWS CLI, Node.js, Jest, Front-end, Docker, Storybook, Figma, UI Components, React Testing Library, HTML5, Amazon Route 53, Amazon EC2, AWS ELB, Front-end Development, AWS Auto Scaling, UI Design, Full-stack, API Integration, Design Systems, React Redux, Web Development, Test-driven Development (TDD), Cloud, Serverless, Redux, REST, Context API, Unit Testing, AWS Amplify, User Interface (UI), Team Leadership, Amazon Web Services (AWS), Amazon RDS, Architecture, Dashboards, MERN Stack, Tailwind CSS, TypeScript, Web App Development, Responsive Web Design (RWD), User Experience (UX), Full-stack Development, English, CI/CD Pipelines, OpenAI GPT-4 API, Web Applications, SCSS, React Components, Artificial Intelligence (AI), GitHub

Freelance Developer

2021 - 2025
Bighead Technologies
  • Developed a client and tablet app using React Native with Expo for Android and iOS.
  • Tracked issues, code, and the allocated time using GitLab and FreshBooks.
  • Used EAS Build for iOS and Android to deploy the app to the Apple Store and the Google Play Store.
Technologies: React Native, Expo, JavaScript, WebStorm, Ubuntu, GitLab, HTML, CSS, Front-end Development, Bootstrap 4, Node.js, Express.js, APIs, REST APIs, JSON, Front-end, Docker, AWS CLI, Jest, Storybook, Figma, Python, UI Components, React Testing Library, HTML5, Amazon EC2, AWS ELB, Amazon Virtual Private Cloud (VPC), Amazon S3 (AWS S3), UI Design, Full-stack, API Integration, SaaS, eCommerce, Design Systems, React Redux, Web Development, Test-driven Development (TDD), Cloud, Serverless, Redux, REST, Context API, Unit Testing, AWS Amplify, User Interface (UI), Team Leadership, Minimum Viable Product (MVP), Amazon Web Services (AWS), Architecture, Tailwind CSS, MERN Stack, Next.js, TypeScript, Web App Development, Full-stack Development, FreshBooks, React Query, English, CI/CD Pipelines, Web Applications, Mobile Development, Firebase, SCSS, React Components, GitHub, Material UI

Full-stack Developer

2024 - 2024
Etterno.io Inc
  • Implemented advanced user authentication features by integrating phone, IP, browser, and device fingerprinting into SSO Plus and Securify Shopify apps, enhancing user security and fraud detection capabilities.
  • Established PostgreSQL database connectivity for a Laravel-based back end to enable robust data storage and retrieval, improving application scalability and performance.
  • Enhanced usability and responsiveness of the social login app by adding multi-platform login support (Facebook, Google, LinkedIn) and ensuring a seamless user experience across devices through comprehensive responsiveness fixes.
Technologies: React, Shopify, Laravel, Shopify Liquid, Node.js, PHP, Custom Shopify Apps, IPQS, React Components, Full-stack Development, GitHub, Material UI, MongoDB

Full-stack Shopify Developer

2024 - 2024
Studio Almond
  • Developed modules for dynamic form building and its integration in the Shopify theme using app blocks. Worked on the module Bundle Builder, which helps customers group their bundle products and sell them as one entity. Added theme fixes.
  • Tracked the time and progress on tickets using a productive platform.
  • Enhanced the overall functionalities requested by the clients, ensuring their contract terms.
Technologies: Shopify, JavaScript, Node.js, React, Gadget.dev, GraphQL, APIs, React Router, English, Web Applications, Firebase, SCSS, React Components, Full-stack Development, GitHub, MongoDB

Shopify App Developer

2024 - 2024
Payme Limited
  • Guided the development of a payments app by debugging the flow of the app and user interaction. Fixed issues regarding the redirection flow.
  • Suggested ways of resolving the review points shared in the initial review by Shopify.
  • Steered through with the initial review cycle on resubmission of the app.
Technologies: Shopify, Shopify Payments, Shopify API, Custom Shopify Apps, Digital Payments, TypeScript, Web App Development, React Router, English, Web Applications, Firebase, SCSS, React Components, GitHub, MongoDB

Technical Consultant | Senior Developer

2022 - 2023
Ziffity
  • Developed a website for Coloro, the client. Developed another version with Chinese language support (coloro.com and qa.coloro.org.cn/). Managed a team of two developers and two designers.
  • Tracked issues on Jira, provided code reviews, and did server deployment.
  • Delivered both websites well within the deadline. Implemented test using the React Testing Library to provide code coverage reports and ensure the robustness of the app.
Technologies: Next.js, React, Node.js, Figma, REST APIs, CSS, Amazon Route 53, Amazon EC2, AWS ELB, Front-end Development, Amazon Virtual Private Cloud (VPC), Amazon S3 (AWS S3), AWS Auto Scaling, UI Design, Full-stack, API Integration, SaaS, Design Systems, React Redux, Web Development, Test-driven Development (TDD), Cloud, Serverless, Redux, REST, Context API, Unit Testing, AWS Amplify, User Interface (UI), Team Leadership, Minimum Viable Product (MVP), Amazon Web Services (AWS), Amazon RDS, Architecture, Vercel, Dashboards, MERN Stack, Web App Development, Android, iOS, React Native for Web, React Query, React Router, English, Web Applications, Mobile Development, SCSS, React Components, Full-stack Development, GitHub

Contract Senior Developer

2021 - 2023
Freelance clients
  • Developed a panel for tracking the carbon footprint of the organization. Developed components for the Natwest design system. Added features to pre-existing components and theme implementation for the Natwest 2023 design system.
  • Tracked the bugs on Jira and developed test cases for the testing page and components at the unit and integration level.
  • Met the delivery deadline, with the project rated four stars by end users in terms of usability and user experience in report generation.
  • Closed 50 open issues, developed five new components, contributed to 10 existing components, and led a team of resource sections and report generation.
Technologies: React, Redux, Node.js, REST APIs, HTML5, Amazon EC2, AWS ELB, Front-end Development, Amazon Virtual Private Cloud (VPC), Amazon S3 (AWS S3), AWS Auto Scaling, UI Design, Full-stack, API Integration, SaaS, Design Systems, React Redux, Web Development, Test-driven Development (TDD), Cloud, Serverless, REST, Context API, AWS Amplify, User Interface (UI), Team Leadership, Minimum Viable Product (MVP), Amazon Web Services (AWS), Amazon RDS, Architecture, MERN Stack, Next.js, Web App Development, User Experience (UX), Android, iOS, React Native for Web, Google Cloud Platform (GCP), React Query, React Router, English, Web Applications, SCSS, React Components, GitHub, Material UI, MongoDB

Senior Engineer

2021 - 2022
Nagarro
  • Handled React-based, real-time, online casino gaming applications. Provided an aggregator platform for monitoring activities like deposit, cash out, and login behavior and applied international regulations required for safe gaming.
  • Contributed to an Agile-based app development process and worked on a TFS-based repository management system to handle bugs and tasks and monitor the sprint progress.
  • Changed the infrastructure by migrating code from Angular 1.6 to the latest React version, improving page performance and reducing page loading time.
Technologies: JavaScript, React, TFS, Git, WebStorm, TypeScript, HTML, CSS, Front-end Development, Bootstrap 4, APIs, REST APIs, JSON, Front-end, Docker, AWS CLI, Jest, Figma, Python, UI Components, React Testing Library, HTML5, Amazon Route 53, Amazon EC2, Amazon Virtual Private Cloud (VPC), AWS Auto Scaling, UI Design, Full-stack, API Integration, Web Development, Redux, REST, Context API, Unit Testing, AWS Amplify, User Interface (UI), Amazon Web Services (AWS), Amazon RDS, Architecture, Vercel, MERN Stack, Web App Development, User Experience (UX), iOS, React Query, English, Web Applications, SCSS, React Components, Full-stack Development, GitHub, Material UI, MongoDB

Senior Developer

2019 - 2021
CEDCOSS Technologies Private
  • Developed three highly-rated eCommerce applications for the Shopify marketplace, handling a customer base of over 5,000 clients and increasing the company revenue by almost 15%.
  • Used ClickUp and Jira to manage the deliverables timeline and deliver a high-quality product within the deadline.
  • Deployed front-end builds to the hosting server and participated in code review meetings to maintain coding standards across the organization.
Technologies: JavaScript, React, React Native, PhpStorm, WebStorm, HTML, CSS, Front-end Development, Bootstrap 4, Shopify API, Node.js, Express.js, APIs, REST APIs, JSON, Front-end, AWS CLI, Jest, Storybook, Figma, Python, UI Components, React Testing Library, HTML5, Amazon EC2, AWS ELB, AWS Auto Scaling, UI Design, Full-stack, API Integration, SaaS, eCommerce, Design Systems, React Redux, Web Development, Test-driven Development (TDD), Cloud, Serverless, Redux, REST, Context API, Unit Testing, User Interface (UI), Team Leadership, Minimum Viable Product (MVP), Amazon Web Services (AWS), Architecture, Custom Shopify Apps, Shopify, Vercel, Dashboards, MERN Stack, TypeScript, Web App Development, Automation, Responsive Web Design (RWD), User Experience (UX), Angular, Full-stack Development, GraphQL, Google Cloud Platform (GCP), React Query, React Router, English, Web Applications, SCSS, React Components, Material UI, MongoDB

Web Application Developer

2018 - 2019
CEDCOSS Technologies Private
  • Developed an eCommerce application that helps sellers on Shopify sync products, orders, and shipments with Google marketplace using REST API in real-time.
  • Got involved in the process of publishing the app on the Shopify app store and successfully helped almost 1500+ sellers onboard to the Google marketplace.
  • Achieved a minimum of 40 app downloads daily, making the app one of the highest-rated applications on the Shopify marketplace.
Technologies: React, PHP, HTML, CSS, Front-end Development, Bootstrap 4, Shopify API, Node.js, Express.js, APIs, REST APIs, JSON, Front-end, AWS CLI, Jest, Storybook, Figma, UI Components, React Testing Library, HTML5, Amazon EC2, UI Design, Full-stack, API Integration, SaaS, eCommerce, Design Systems, React Redux, Web Development, Test-driven Development (TDD), Cloud, Redux, REST, Context API, Unit Testing, User Interface (UI), Minimum Viable Product (MVP), Amazon Web Services (AWS), Architecture, Custom Shopify Apps, Shopify, Vercel, Dashboards, MERN Stack, TypeScript, Web App Development, Automation, Responsive Web Design (RWD), Angular, Full-stack Development, GraphQL, Google Cloud Platform (GCP), React Query, React Router, English, Web Applications, SCSS, React Components, GitHub, Material UI

Experience

Amazon by CedCommerce

https://apps.shopify.com/amazon-by-cedcommerce?surface_detail=amazon&surface_inter_position=1&surface_intra_position=4&surface_type=search
A React-based application that integrates with Amazon using REST API for product upload and syncing details. The app contributes to 4% of the revenue and 5% of the total customer base of the organization. It is one of the highest-rated sales channel applications in the Shopify App Store.

I contributed to the team as a front-end developer and designed the entire front end.

Integration for eBay

https://apps.shopify.com/ebay-integration?surface_detail=Ebay&surface_inter_position=1&surface_intra_position=2&surface_type=search
A React-based app with interactive pages, scalable on desktop and mobile. The app handles over 2,400 active onboarded customers with more than 10,000 orders successfully placed.

I developed the complete front end in React and scripted and integrated AWS Lambda functions to enable a scalable architecture. I also used webhooks from Shopify and handled the integration with microservices like RabbitMQ, increasing real-time data syncing by almost two times.

Suite for Google Shopping Feed

https://apps.shopify.com/google-express-integration?surface_detail=Google&surface_inter_position=1&surface_intra_position=6&surface_type=search
A React-Redux-based application that integrates with a Google API for uploading and managing sellers' products, orders, and shipments.

I developed and designed all the front-end interactive pages and architecture. I also implemented data storage and app servers on AWS, enabling horizontal auto-scaling, and designed and implemented product data storage on MongoDB.

Multichannel Importer

https://apps.shopify.com/ced-importer?surface_detail=Multichannel&surface_inter_position=1&surface_intra_position=4&surface_type=search
A React-based app that is one of the most liked apps on Shopify, per public ratings, and has over 3,000 active clients.

I designed the app on React with the ability to handle real-time data on Phalcon. I also integrated Shopify and Walmart via RESTful APIs with authentication and data storage on MongoDB.

Coloro Website

https://coloro.com/
A single-page website implementation developed using Next.js and Node.js. The website is the primary website for the company that provides coloring services and palettes. I led a team of two developers and two designers to develop the website/app. We also developed reusable components and pages from Figma designs. GitHub was used for the project version control, and Jira was used to track issues. Finally, we provided code review to the PRs on Git.

Education

2013 - 2017

Bachelor's Degree in Computer Science and Engineering

Babu Banarasi Das Northern India Institute of Technology - Lucknow, India

Certifications

JANUARY 2024 - JANUARY 2027

AWS Certified Developer – Associate

Amazon Web Services

JULY 2022 - PRESENT

AlgoExpert Certificate

AlgoExpert

FEBRUARY 2021 - PRESENT

Ultimate AWS Certified Cloud Practitioner – 2022

Udemy

Skills

Libraries/APIs

React, Shopify API, Node.js, REST APIs, React Testing Library, React Redux, Context API, React Query, AWS Amplify, React Native for Web, React Router

Tools

GitHub, Git, WebStorm, PhpStorm, Expo, Figma, AWS ELB, Amazon Virtual Private Cloud (VPC), GitLab, TFS, AWS CLI, FreshBooks, LaTeX

Languages

JavaScript, TypeScript, CSS, SCSS, HTML, Python, HTML5, PHP, GraphQL, Shopify Liquid, TikZ

Frameworks

React Native, Material UI, Redux, Next.js, Tailwind CSS, Express.js, Jest, Angular, Laravel

Paradigms

REST, UI Design, Test-driven Development (TDD), Unit Testing, Responsive Web Design (RWD), Automation, Mobile Development

Platforms

Amazon EC2, Shopify, Vercel, Amazon Web Services (AWS), Android, iOS, Google Cloud Platform (GCP), Ubuntu, Windows, Docker, AWS Lambda, Firebase, Visual Studio Code (VS Code), MacOS

Storage

MongoDB, JSON, Amazon S3 (AWS S3)

Other

Web App Development, Front-end Development, APIs, Front-end, UI Components, Amazon Route 53, AWS Auto Scaling, Full-stack, API Integration, SaaS, eCommerce, Design Systems, Web Development, Serverless, User Interface (UI), Team Leadership, Minimum Viable Product (MVP), Architecture, Custom Shopify Apps, Dashboards, MERN Stack, User Experience (UX), Full-stack Development, English, Web Applications, React Components, Artificial Intelligence (AI), Bootstrap 4, Storybook, Cloud, Amazon RDS, CI/CD Pipelines, OpenAI GPT-4 API, Data Structures, Algorithms, Shopify Payments, Digital Payments, Gadget.dev, IPQS, Large Language Models (LLMs), Cursor AI

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