Krunal Shah, Developer in Ahmedabad, Gujarat, India
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Krunal Shah

Bio

Krunal is a Full-Stack Engineer with 9+ years of experience building systems that scale from zero-to-one MVPs to platforms handling billions of monthly requests. He specialises in Node.js, React, Next.js, and Python, with hands-on experience in LLM integration and AI-driven products. He's shipped across fintech, media, Web3, and AI and has helped multiple clients raise funding through solid technical execution.

Portfolio

ProperX
Node.js, Next.js, TypeScript, Microservices, Amazon Web Services (AWS), Docker...
Medentry
Next.js, React, React Native, TypeScript, REST APIs, Performance Optimization...
Infynno Solutions
Node.js, React, Next.js, React Native, NestJS, TypeScript, Python...

Experience

  • React - 9 years
  • Node.js - 9 years
  • Microservices Architecture - 7 years
  • TypeScript - 6 years
  • Amazon Web Services (AWS) - 5 years
  • Next.js - 5 years
  • Python - 3 years
  • LLM Integration - 3 years

Preferred Environment

MacOS, Amazon Web Services (AWS)

The most amazing...

...Architected an LLM-powered tax automation platform from scratch that helped the company raise millions in funding.

Work Experience

Full-Stack Engineer

2022 - PRESENT
ProperX
  • Architected a multi-feature social platform combining elements of Twitter, Instagram, and Twitch on a Node.js microservices backend.
  • Scaled the platform to millions of fans and thousands of creators while managing all DevOps infrastructure end-to-end.
  • Built the complete Next.js frontend, delivering a performant and polished user experience across web and mobile viewports.
  • Led SOC2 Type II and GDPR compliance efforts across the full platform, coordinating engineering and legal stakeholders.
Technologies: Node.js, Next.js, TypeScript, Microservices, Amazon Web Services (AWS), Docker, Kubernetes, PostgreSQL, MongoDB, REST APIs, DevOps, CI/CD Pipelines, Agora, Twilio, SendGrid, Microservices Architecture, React, Python, Back-end, Terraform

Frontend Engineer

2020 - 2026
Medentry
  • Built the Next.js frontend for Australia and UK's largest medical entrance exam preparation platform serving hundreds of thousands of students.
  • Developed the React Native mobile application, delivering a consistent and performant experience across iOS and Android.
  • Consulted on backend deployment architecture and infrastructure optimisations, improving platform reliability and performance.
Technologies: Next.js, React, React Native, TypeScript, REST APIs, Performance Optimization, Amazon Web Services (AWS), Node.js, Back-end, ECS

Full-Stack Engineer

2019 - 2026
Infynno Solutions
  • Architected an LLM-powered tax automation platform using microservices on AWS EKS, leading a team of 5 engineers through to a multi-million dollar fundraise.
  • Reduced cloud infrastructure costs by 50% for a high-traffic news site while sustaining billions of monthly requests with improved reliability.
  • Built and scaled a Norway-based social platform to millions of fans and thousands of creators using Node.js microservices and Next.js.
  • Delivered full-stack React Native and Next.js applications for Australia and UK's largest medical entrance exam preparation platform.
  • Architected serverless backend infrastructure on AWS Lambda and API Gateway for a privacy and consent management platform.
  • Led SOC2 Type II and GDPR compliance programmes across multiple international client platforms coordinating engineering and legal teams.
  • Shipped a complete Next.js rebuild of a top-rated NFT trading platform, significantly improving performance, UX, and reliability.
  • Built end-to-end NestJS backend, Next.js frontend, and React Native mobile app for a Canadian carpooling platform independently.
Technologies: Node.js, React, Next.js, React Native, NestJS, TypeScript, Python, Amazon Web Services (AWS), Amazon EKS, Kubernetes, Docker, Microservices, PostgreSQL, MongoDB, REST APIs, GraphQL, LLM Integration, Serverless Architecture, CI/CD Pipelines, Microservices Architecture, AWS Lambda, Back-end, Terraform, ECS

Contract

2020 - 2024
Notice Ninja
  • Architected a microservices-based LLM platform using OCR to extract and process tax notices, automating resolution workflows at scale.
  • Designed and deployed scalable Node.js services on Kubernetes via AWS EKS, handling millions of notices in production.
  • Built the complete React frontend, translating complex tax workflows into a clean, intuitive user interface.
  • Led a cross-functional team of 5 engineers from architecture through delivery, contributing to a multi-million dollar fundraise.
  • Drove SOC2 Type II compliance programme end-to-end, coordinating across engineering, legal, and security teams.
Technologies: Node.js, React, TypeScript, Amazon EKS, Kubernetes, Microservices, PostgreSQL, LLM Integration, Optical Character Recognition (OCR), REST APIs, Docker, CI/CD Pipelines, Microservices Architecture, Amazon Web Services (AWS), Next.js, Python, Back-end, Terraform

Full-Stack Engineer

2021 - 2023
FMT (Free Malaysia Today)
  • Upgraded the Next.js frontend to the latest version, resolving critical performance bottlenecks on Malaysia's largest multilingual news site.
  • Optimised the WordPress backend and database layer, reducing GCP infrastructure costs by ~50% without compromising reliability.
  • Sustained billions of monthly requests post-optimisation with improved platform stability and load performance.
Technologies: Next.js, React, WordPress, Google Cloud Platform (GCP), MySQL, Performance Optimization, TypeScript, REST APIs, GraphQL, Node.js, Amazon Web Services (AWS), Back-end

Full-Stack Engineer

2019 - 2019
Magic Technolabs
  • Contracted with US-based clients to design and deliver full-stack web applications end-to-end, independently managing architecture and delivery.
  • Built a freelance marketplace from scratch using Node.js and React, covering platform architecture, API design, and frontend.
  • Advised US-based clients on AWS infrastructure and scalable backend architecture across multiple concurrent remote engagements.
Technologies: Node.js, React, JavaScript, REST APIs, Amazon Web Services (AWS), System Architecture, Full-stack Development, Software Consulting, Next.js, Back-end

Software Engineer

2017 - 2019
Rayvat
  • Built and launched a US-based secondary ticket marketplace end-to-end, independently architecting the Laravel backend and frontend as a junior engineer.
  • Developed and maintained multiple client-facing web products using Laravel and CodeIgniter for international outsourced engagements.
  • Gained strong foundations in RESTful API design, MVC architecture, and agile delivery workflows across diverse international client projects.
Technologies: PHP, Laravel, MySQL, JavaScript, jQuery, REST APIs, CodeIgniter, PHP MVC, React, Node.js, Amazon Web Services (AWS), Back-end

Experience

AI-Powered Cybersecurity Intelligence Platform

Led architecture, cloud deployment, and frontend development of an AI-driven cybersecurity intelligence platform. Contributed to technical positioning and roadmap, helping the team secure their seed funding round.

Top-Rated NFT Trading Platform Rebuild

Delivered a complete rebuild of one of the highest-rated NFT trading platforms during the height of Web3 adoption. The existing platform had significant performance bottlenecks and UX issues that were impacting user retention and trading volume. Rebuilt the entire frontend using Next.js, overhauling the component architecture, optimising rendering performance, and redesigning key user flows to improve the trading experience. The rebuild significantly improved page load times, platform reliability, and overall UX — helping the platform maintain its top-rated status during peak Web3 market activity.

Serverless Privacy & Consent Management Platform — XCooBee

Developed serverless backend infrastructure for a privacy and consent management platform, implementing AWS Lambda functions and API Gateway integrations to handle consent workflows, data privacy operations, and regulatory compliance at scale.

Freelance Marketplace Platform - GigHub

Built a Fiver-style freelance marketplace from scratch for US-based clients using Node.js and React — independently handling platform architecture, RESTful API design, database modelling, and complete frontend implementation.

US-Based Secondary Ticket Marketplace - TixBag

http://tixbag.com
Built a US-based secondary ticket marketplace end-to-end from scratch as an early-career engineer, independently architecting and delivering the full platform. Designed the Laravel backend handling ticket listings, inventory management, order processing, and user authentication. Built the jQuery-powered frontend covering browse, search, and checkout flows. Handled database modelling, RESTful API design, and deployment independently gaining strong foundations in full-stack architecture, MVC patterns, and agile delivery while delivering a production-ready marketplace for the US market.

Education

2012 - 2016

Bachelor's Degree in Computer Engineering

Gujarat Technological University - Gujarat, India

Skills

Libraries/APIs

React, Node.js, Stripe, API Development, Chart.js, React Flow, Rollup.js, REST APIs, jQuery

Tools

Git, Amazon Elastic Container Service (ECS), Amazon Elastic Container Registry (ECR), Amazon Simple Notification Service (SNS), Amazon ElastiCache, Claude Code, WebStorm, Terraform, Auth0, GitHub, GitHub Pages, NPM, Coveralls, Amazon EKS, Agora, SendGrid

Languages

TypeScript, GraphQL, JavaScript, PHP, CSS, Python

Frameworks

Laravel, React Native, Next.js, Express.js, NestJS, Tailwind CSS, Cypress, CodeIgniter, PHP MVC

Paradigms

Microservices Architecture, Agile, REST, Microservices, E2E Testing, DevOps, Serverless Architecture, Test-driven Development (TDD), Management, Web UI Design, Refactoring

Platforms

Amazon Web Services (AWS), Docker, MacOS, Linux, Windows, AWS Lambda, Amazon EC2, Firebase, Kubernetes, Google Cloud Platform (GCP), WordPress, Twilio

Storage

MySQL, MongoDB, PostgreSQL, Amazon S3 (AWS S3), Redis

Other

Front-end Development, Amazon API Gateway, Code Review, API Integration, Back-end, Software Architecture, Engineering Management, Cloud Architecture, Technical Leadership, Technical Architecture, SaaS, Agentic RAG Systems, RAG Architecture, Cursor AI, Supabase, SOC 2, LLM Integration, ECS, Progressive Web Applications (PWAs), Large Language Models (LLMs), LangChain, Agentic AI, PWA, ESLint, Storybook, Segment, Chatbots, CI/CD Pipelines, System Architecture, Full-stack Development, Software Consulting, Optical Character Recognition (OCR), Performance Optimization, FastAPI, Fine-tuning, AI Integration, Third-party APIs, Large-scale Data Processing, Web3, General Data Protection Regulation (GDPR), Maps

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