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Ayush Gupta
Verified Expert in Engineering
Full-stack Developer
Delhi, India
Toptal member since May 18, 2022
Bio
Ayush has 10+ years of experience in full-stack and AI development using Node.js, JavaScript, TypeScript, Laravel, React, and React Native. He handles all aspects of project delivery, such as requirements gathering, specification design, development, and post-delivery maintenance. As a technical architect, Ayush has managed and mentored teams, overseen project planning, and possesses insights into software development best practices.
Portfolio
Mainland Digital Inc.
React Native, Node.js, Python, PostgreSQL, Heroku, Large Language Models (LLMs)...
Aircall
Agile, React, TypeScript, Node.js, Full-stack, Technical Leadership, AI Agents...
Carrier Global
React Native, React, JavaScript, GraphQL, CSS, Tailwind CSS, Monorepos...
Experience
- React - 10 years
- Node.js - 10 years
- JavaScript - 10 years
- React Native - 8 years
- Python - 4 years
- Large Language Models (LLMs) - 2 years
- Retrieval-augmented Generation (RAG) - 2 years
- AI Chatbots - 2 years
Preferred Environment
Windows, Slack, Visual Studio Code (VS Code), Cursor AI, MacOS
The most amazing...
...app I have developed is an online learning platform that integrated Zoom for live classes and scaled it from zero to 10,000+ simultaneous active users.
Work Experience
Technical Lead | Full-stack Developer
2025 - 2026
Mainland Digital Inc.
- Built a React Native based mobile app that allows users to track daily health and lifestyle data points, helping them to iteratively and quantifiably improve their quality of life over time.
- Developed pixel-perfect and intuitive UI screens allowing users to smoothly and effortlessly track health metrics and view insights.
- Built scalable data models and back-end application using Nest.js and Python-based microservices to ensure a solid foundation for scalability in the future.
- Integrated AI capabilities using large language models (LLMs), such as weekly summaries for the user and the ability to track food macros using multimodal LLM models, and allowing users to simply click a picture and generate estimated macros.
- Developed a RAG-based AI chatbot allowing user to chat with their historical data in the application. Developed the required vector ingestion pipeline and front-end facing integrations to surface chat capabilities in the app.
Technologies: React Native, Node.js, Python, PostgreSQL, Heroku, Large Language Models (LLMs), REST APIs, NestJS, Prisma, Kysely, Redis, FastAPI, Microservices, Redis Pub/Sub, Pinecone, Vector Databases, Retrieval-augmented Generation (RAG), AI Chatbots, AI Integration, Cloud Architecture, Code Deployment, Chatbots, Claude
Technical Lead | Full-stack Developer
2024 - 2025
Aircall
- Developed a RAG-based chatbot for the support portal (support.aircall.io) using React, Python, Pinecone, OpenAI APIs, and AWS Bedrock. The chatbot responds to user queries using the help articles and other knowledge sources.
- Built a scalable ingestion pipeline to facilitate daily updation of support articles, legal documentation, and developer API reference in the LLM context.
- Developed an evaluation pipeline to allow quantification of LLM performance and iterative improvement of answer quality using Braintrust and custom Python-based microservices while leveraging Golden and synthetic datasets.
- Created a synthetic dataset generation pipeline that updated the synthetic QA pairs using an optimised method, ensuring LLM spend is kept as low as possible.
- Developed robust monitoring and observability in the whole platform to ensure any issues that may impact chatbot performance or usability are detected as soon as possible, and corrective steps are taken.
- Oversaw the growth team in driving various experiments on the signup and onboarding flow, leading to a 15% increase in conversions of users who complete the trial process.
Technologies: Agile, React, TypeScript, Node.js, Full-stack, Technical Leadership, AI Agents, Agentic AI, OpenAI, OpenAI API, ChatGPT API, Pinecone, Vector Databases, Amazon Bedrock AgentCore, Python, FastAPI, Data Engineering, Data Build Tool (dbt), Redshift, Retrieval-augmented Generation (RAG), Artificial Intelligence (AI), AI Tools, Cloud Infrastructure, AI Chatbots, Redis, RESTFul APIs, Zustand, Python Asyncio, Large Language Models (LLMs), Asynchronous Programming, ChatGPT, GraphQL, Apollo, Datadog, Generative Artificial Intelligence (GenAI), LangChain, AI Integration, Cloud Architecture, Code Deployment, Chatbots, Claude
Lead Front-end Developer
2024 - 2024
Carrier Global
- Developed a technician and customer-facing app to control (and diagnose) HVAC systems and smart appliances.
- Built various UI functionalities and screens by translating Figma designs into pixel-perfect UI components that scaled efficiently across different screen sizes.
- Developed and maintained a cross-platform UI library being used across React and React native projects, such as a home automation management web dashboard, consumer-facing mobile application, and warehouse management dashboard.
- Identified and optimized bottlenecks in CI/CD pipeline of UI projects, reducing overall CI execution time by 80%, significantly reducing overall expenditure for CI tools and 3rd-party platforms.
Technologies: React Native, React, JavaScript, GraphQL, CSS, Tailwind CSS, Monorepos, Code Deployment
Full-stack Web/Mobile App Developer
2023 - 2024
Right Insight LLC
- Developed business-critical functionalities to the organization's campaign management tool in rapid iterations, allowing the client to demo new features and close new customers quickly.
- Worked closely with the database team to optimize data access patterns and ensure that the web and mobile apps do not present any slowness.
- Developed CRM functionality into the platform, effectively allowing the organization to replace salesforce and save significant costs.
- Ideated and implemented an easier and more intuitive UX for the volunteers working on tasks, allowing them to get to their next task in a single tap.
Technologies: React, GraphQL, TypeScript, Amazon Web Services (AWS), PostgreSQL, React Native, Expo, Trello, Expo.io, Auth0, Mobile Apps, Reports, Dashboards, ESLint, Application State Management, Responsive Web Apps, Software Engineering, Web App Development, JSX, Reporting, Minimum Viable Product (MVP), Startups, Third-party APIs, Database Architecture, OpenAI, Serverless, Code Refactoring, Code Review, Cloud Infrastructure, AWS Amplify, RESTFul APIs, Asynchronous Programming, Apollo, Generative Artificial Intelligence (GenAI), Cloud Architecture, Code Deployment
Full-stack Developer
2023 - 2024
Cruise
- Deep-dived, debugged, and optimized an existing set of APIs to reduce response latency from over 30 seconds to less than 1 second.
- Reduced database infrastructure required to run the APIs by around 78%.
- Ideated a new polygon management platform for the organization with other lead architects.
- Developed the front end for the new polygon management with the back-end team.
Technologies: React, Node.js, TypeScript, PostgreSQL, SQL, Full-stack Development, NestJS, Microservices, Monorepos, Cloud, Back-end, Data Structures, Front-end Development, User Experience (UX), ESLint, Application State Management, Figma, Software Engineering, Web App Development, Mapbox, Microservices Architecture, Startups, Continuous Integration (CI), Continuous Delivery (CD), DevOps, Containers, Docker, Code Refactoring, Code Review, Cloud Infrastructure, Redis, RESTFul APIs, Asynchronous Programming, Datadog, Google Cloud, Cloud Architecture, Code Deployment
Full-Stack/React Native Developer
2023 - 2023
Eastside Healthcare Staffing LLC
- Worked with the CTO to develop robust reporting pipelines around the existing staffing software using Kotlin and a serverless framework.
- Built a real-time location-tracking application to minimize missed staffing appointments by assessing the probability of whether assigned staff will reach the facility on time or not.
- Enhanced the real-time location-tracking application to gauge whether the staff is within the facility's geofence, allowing the organization to process same-day payouts in shifts with high location confidence.
- Planned and built the public-facing job board using React and Vercel, along with a junior front-end engineer.
Technologies: TypeScript, React Native, Amazon Web Services (AWS), Serverless Framework, AWS Lambda, Serverless, React, Agile, Tailwind CSS, Vercel, Kotlin, Node.js, AdonisJS, Architecture, Back-end Development, Front-end Development, User Experience (UX), Reports, Dashboards, API Design, API/Services Architecture, CI/CD Pipelines, ESLint, Application State Management, Responsive Web Apps, Software Engineering, Web App Development, Google Maps, Microservices Architecture, JSX, Reporting, Minimum Viable Product (MVP), Startups, Third-party APIs, Continuous Integration (CI), Continuous Delivery (CD), DevOps, Containers, Stripe, Database Architecture, Code Refactoring, Code Review, Cloud Infrastructure, RESTFul APIs, Asynchronous Programming, Cloud Architecture, Code Deployment
Full-stack Engineer (Maps Team)
2022 - 2022
Cruise
- Enhanced a mapping tool that is a crucial part of the data ingestion pipeline, allowing structured information to be generated from raw data, forming the very base of insights needed for autonomous vehicles.
- Worked on various enhancements in the tool, which exponentially improved the operation's efficiency.
- Automated various back-end services, allowing faster operations performance and eliminating human errors and time to value in various repetitive efforts.
Technologies: React, Node.js, TypeScript, SQL, PostgreSQL, Full-stack Development, NestJS, Microservices, Monorepos, Cloud, React Redux, API Integration, Back-end, Data Structures, Redux, Redux Toolkit, Docker, Back-end Development, Front-end Development, User Experience (UX), ESLint, Application State Management, Figma, Software Engineering, Web App Development, Mapbox, JSX, Startups, Continuous Integration (CI), Continuous Delivery (CD), DevOps, Containers, Code Refactoring, Code Review, Cloud Infrastructure, RESTFul APIs, Asynchronous Programming, Datadog, Google Cloud, Cloud Architecture, Code Deployment
Contractual Tech Lead
2021 - 2022
ObjectEdge
- Worked as a senior front-end developer in an enterprise IT company.
- Developed the front end for a major eCommerce provider in South America.
- Mentored new juniors in the team and did onboarding and code reviews.
- Participated in task planning and took part in technical refinements of Jira tickets.
Technologies: Next.js, React, TypeScript, React Apollo, GraphQL, Monorepos, HTML, Full-stack Development, Web Development, Agile, Leadership, eCommerce, Front-end, REST APIs, MERN Stack, Cloud, React Redux, Amazon S3 (AWS S3), API Integration, Data Structures, Vercel, Redux, Front-end Development, User Experience (UX), API Design, API/Services Architecture, ESLint, Application State Management, Responsive Web Apps, Figma, Software Engineering, Web App Development, JSX, Code Review, RESTFul APIs, Asynchronous Programming, Apollo, Cloud Architecture, Code Deployment
Senior Full-stack Developer | Team Lead
2021 - 2022
VertikalRMS
- Worked as part of a well-established, large SaaS company offering compliance and risk management ERP as a senior developer and team lead.
- Interacted with the CTO and oversaw sprint planning and progress tracking.
- Worked on building V3 using a microservices architecture.
- Helped maintain a legacy V2, which was in a dire situation with daily fires being reported.
- Developed foundations and boilerplates for new services and took part in coding services.
Technologies: JavaScript, TypeScript, Express.js, MSSQLCE, SQL, NestJS, Sequelize, TypeORM, Node.js, React, Git, Agile Project Management, IT Project Management, ECMAScript (ES6), Software Architecture, REST, Full-stack, REST APIs, Amazon Web Services (AWS), APIs, Architecture, HTML, Full-stack Development, Web Development, Agile, Leadership, Beanstalk, Front-end, MERN Stack, Technical Leadership, Cloud, Technical Architecture, React Redux, Amazon S3 (AWS S3), Solution Architecture, API Integration, Software Design, SaaS, Back-end, Data Structures, Redux, Back-end Development, Front-end Development, User Experience (UX), Reports, API Design, API/Services Architecture, CI/CD Pipelines, ESLint, Application State Management, Software Engineering, Recharts, Web App Development, Data Visualization, Microservices Architecture, JSX, Reporting, Third-party APIs, Continuous Integration (CI), DevOps, Containers, Docker, Code Refactoring, Code Review, Cloud Infrastructure, Redis, RESTFul APIs, Asynchronous Programming, Cloud Architecture, Code Deployment
Contractual Full-stack Developer
2019 - 2022
Qwiggo
- Developed a bespoke, highly integrated eCommerce platform, closely integrated with the legacy software of a large, well-established D2C and direct selling organization as a solo developer.
- Worked with business owners to identify pain points and propose technology-first solutions to alleviate them.
- Developed their mobile app during the pandemic, allowing the company to survive the lockdown as previously, their business was entirely dependent on human interactions.
- Onboarded five additional developers to increase the development velocity and allow the client to accomplish multiple goals in parallel.
- Ideated new initiatives with the business owners, planned work, and managed the team to complete the initiatives efficiently.
- Planned and accomplished a pivot from a D2C platform to a marketplace aggregator platform within three months.
Technologies: AdonisJS, React, React Native, TypeScript, Node.js, MySQL, SQL, IT Project Management, Team Leadership, CSS, User Interface (UI), HTML5, ECMAScript (ES6), REST, Full-stack, REST APIs, Amazon Web Services (AWS), APIs, Solution Architecture, Software Design, User Experience (UX), Mobile Apps, Reports, Dashboards, API Design, API/Services Architecture, CI/CD Pipelines, ESLint, Application State Management, Storybook, Responsive Web Apps, Software Engineering, Online Payments, Web App Development, Amazon Aurora, JSX, Minimum Viable Product (MVP), Startups, Third-party APIs, Database Architecture, Agile Project Management, Code Review, Cloud Infrastructure, RESTFul APIs, Asynchronous Programming, Cloud Architecture, Code Deployment
Consultant Technical Architect
2018 - 2021
SwankInfytech Pvt Ltd
- Oversaw all technical decision-making of the company, including the architecture of products, timelines, and delegating work to colleagues.
- Worked with and mentored new team members and junior developers in the organization.
- Grafted new technologies into the organization along with their best practices and accepted standards.
Technologies: React Native, React, Node.js, Laravel, PHP, MySQL, SQL, AdonisJS, CSS, User Interface (UI), HTML5, ECMAScript (ES6), Software Architecture, REST, Full-stack, REST APIs, Amazon Web Services (AWS), APIs, Architecture, HTML, Full-stack Development, Web Development, Leadership, Front-end, Technical Leadership, Mobile Development, Cloud, Technical Architecture, React Redux, Amazon S3 (AWS S3), Solution Architecture, API Integration, Software Design, SaaS, Back-end, Data Structures, Redux, Back-end Development, Front-end Development, User Experience (UX), Mobile Apps, API Design, API/Services Architecture, ESLint, Application State Management, Responsive Web Apps, Software Engineering, Web App Development, Amazon Aurora, API Gateways, JSX, Minimum Viable Product (MVP), Startups, Third-party APIs, Database Architecture, Agile Project Management, Code Review, Cloud Infrastructure, RESTFul APIs, Asynchronous Programming, Cloud Architecture, Code Deployment
Specialist Programmer
2015 - 2018
Infosys
- Developed POCs and end-to-end development of various in-house applications and web dashboards to simplify the decision-making of our clients.
- Automated day-to-day operations for team members using Python, effectively eliminating mundane work and cutting down the manual data entry team size from two.
- Planned, designed, and developed the complete application, which included deciding technology stacks, database architecture, and the application design based on requirements.
Technologies: JavaScript, Node.js, Java, MySQL, SQL, Hadoop, Web Development, ETL, Big Data, Python, CSS, User Interface (UI), HTML5, ECMAScript (ES6), REST APIs, APIs, HTML, Full-stack Development, Front-end, API Integration, Back-end, Back-end Development, Front-end Development, Software Engineering, Web App Development, RESTFul APIs, Code Deployment
Experience
Qwiggo
Qwiggo is a highly integrated and feature-rich eCommerce platform.
The client had a particular requirement that they needed an eCommerce platform that would allow them to market their products using the D2C channel with minimal manual intervention.
I designed and developed Qwiggo entirely from scratch to cater to the requirement. The database and project architecture was designed keeping in mind that as many steps as possible would be automated to create an order fulfillment pipeline that would allow the client to process and deliver their products as quickly as possible.
Various external services were integrated to deliver automated notifications, updates, and information to clients and to keep track of packages during delivery.
Various data providers were also integrated using REST APIs to inform customers about the benefits they received by shopping on Qwiggo and the rewards they can redeem.
Play store: https://play.google.com/store/apps/details?id=com.qwiggo
The client had a particular requirement that they needed an eCommerce platform that would allow them to market their products using the D2C channel with minimal manual intervention.
I designed and developed Qwiggo entirely from scratch to cater to the requirement. The database and project architecture was designed keeping in mind that as many steps as possible would be automated to create an order fulfillment pipeline that would allow the client to process and deliver their products as quickly as possible.
Various external services were integrated to deliver automated notifications, updates, and information to clients and to keep track of packages during delivery.
Various data providers were also integrated using REST APIs to inform customers about the benefits they received by shopping on Qwiggo and the rewards they can redeem.
Play store: https://play.google.com/store/apps/details?id=com.qwiggo
Sagokomm Mini
http://mini.sagokomm.com/Sagokomm Mini is a multi-tenant, scalable SaaS edtech platform for facilitating online learning. The platform contains YouTube and Zoom integrations to facilitate student-teacher communication and online learning.
This platform offers a mobile app for students and a web portal, so they have the flexibility to attend classes from whichever device they choose.
The application was deployed using AWS Autoscaling architecture to facilitate thousands of students being online and attending their classes simultaneously. The platform also uses other cloud services such as Netlify for web portals and Oracle cloud for Object Storage.
Play store: https://play.google.com/store/apps/details?id=com.swankinfytech.sagokommmini
This platform offers a mobile app for students and a web portal, so they have the flexibility to attend classes from whichever device they choose.
The application was deployed using AWS Autoscaling architecture to facilitate thousands of students being online and attending their classes simultaneously. The platform also uses other cloud services such as Netlify for web portals and Oracle cloud for Object Storage.
Play store: https://play.google.com/store/apps/details?id=com.swankinfytech.sagokommmini
Wispri
Wispri is a price drop alert website catering to consumers in Australia. It allows users to set alerts on products that they want to monitor. Wispri sends notifications to them once it notices a price drop on the products saved by users. The project also has a Chrome extension built using React that allows users to easily create alerts on the products that they wish to monitor.
Gostor
Developed the front-end for a large electronics eCommerce platform in India using Next.js (React) and TailwindCSS.
During this project, I was solely responsible for converting AdobeXD designs to code while working closely with the stakeholders to accommodate the ever-evolving refinements and necessities of the business.
During this project, I was solely responsible for converting AdobeXD designs to code while working closely with the stakeholders to accommodate the ever-evolving refinements and necessities of the business.
Proactive Healthcare Staffing – Job Board
https://jobs.proactivehealthcarestaffing.co/A Next.js/React-based job board with extensive SSG and SSR implementation that allows the client to present available opportunities to new prospective employees.
The application contains a back end for front end (BFF) pattern baked into the Next.js application itself that aggregates data from a headless job management portal and the client's in-house database and presents it on the UI.
The application contains a back end for front end (BFF) pattern baked into the Next.js application itself that aggregates data from a headless job management portal and the client's in-house database and presents it on the UI.
Education
2011 - 2015
Bachelor's Degree in Computer Science
Guru Gobind Singh Indraprastha University (GSSIPU) - Delhi, India
Certifications
APRIL 2017 - PRESENT
MongoDB Certified Developer, Associate
MongoDB University
Skills
Libraries/APIs
Node.js, React, REST APIs, React Redux, Google Maps, OpenAI API, Python Asyncio, AWS Amplify, Recharts, Stripe
Tools
Redux Toolkit, Expo.io, Expo, Trello, JSX, ChatGPT, Beanstalk, Auth0, Figma, Claude, Slack, Google Analytics, Sequelize, Git, React Apollo, Prisma
Languages
JavaScript, SQL, Python, PHP, TypeScript, CSS, HTML5, ECMAScript (ES6), GraphQL, HTML, Java, Kotlin
Frameworks
React Native, Laravel, AdonisJS, Next.js, Express.js, Redux, Tailwind CSS, NestJS, Material UI, Hadoop, Serverless Framework
Paradigms
REST, Agile Project Management, Agile, Mobile Development, API/Services Architecture, Microservices Architecture, Code Refactoring, Asynchronous Programming, Microservices, Continuous Integration (CI), Continuous Delivery (CD), DevOps, ETL, Redis Pub/Sub
Platforms
Windows, Amazon Web Services (AWS), Visual Studio Code (VS Code), AWS Lambda, Mapbox, WAMPP, Vercel, Docker, Firebase, Heroku, MacOS
Storage
MySQL, PostgreSQL, Amazon S3 (AWS S3), Amazon Aurora, Database Architecture, Datadog, Google Cloud, MongoDB, Redis, MSSQLCE, Redshift
Other
Programming, Web Development, IT Project Management, Team Leadership, Technical Architecture, Full-stack, User Interface (UI), APIs, Architecture, Full-stack Development, Leadership, Cloud, eCommerce, Front-end, MERN Stack, Technical Leadership, Solution Architecture, API Integration, Software Design, Back-end, Data Structures, Serverless, Back-end Development, Front-end Development, User Experience (UX), Mobile Apps, API Design, ESLint, Application State Management, Responsive Web Apps, Software Engineering, Online Payments, Web App Development, Reporting, Minimum Viable Product (MVP), Startups, Third-party APIs, Retrieval-augmented Generation (RAG), AI Chatbots, ChatGPT API, AI Agents, Agentic AI, FastAPI, Code Review, Artificial Intelligence (AI), AI Tools, Cloud Infrastructure, RESTFul APIs, Large Language Models (LLMs), Apollo, Generative Artificial Intelligence (GenAI), LangChain, AI Integration, Cloud Architecture, Code Deployment, Chatbots, Software Architecture, Cloudflare, SaaS, Reports, Dashboards, CI/CD Pipelines, Data Visualization, API Gateways, Containers, OpenAI, Zustand, Big Data, Hybrid Apps, Chrome Extensions, TypeORM, Monorepos, Storybook, Pinecone, Vector Databases, Amazon Bedrock AgentCore, Data Engineering, Data Build Tool (dbt), Kysely, Cursor AI
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