Piyush Mishra
Senior Full-Stack Developer (AI & SaaS)
Building Scalable Products with AI at the Core
I design and build scalable full-stack applications with deep SaaS integrations, applied AI/GenAI, and production-ready architectures.
About Me
I’m a senior full-stack engineer with 14+ years of experience building end-to-end products—from rapid prototypes to scalable platforms serving millions of users.
My work spans SaaS integrations, authentication systems, AI-powered features (RAG, summarization, workflow intelligence), and cloud-native architectures. I focus on building systems that balance speed, reliability, and long-term scalability.
I enjoy leading teams, mentoring engineers, and collaborating closely with product and design to turn ambiguous ideas into impactful, production-ready solutions.
Skills & Expertise
React
95%
Next.js
90%
TypeScript
85%
SEO (React Helmet, Snapshot)
80%
WebRTC
75%
Node.js
95%
Python
80%
REST APIs
95%
PostgreSQL
85%
MongoDB
85%
RAG Pipelines
90%
LLM Integration (OpenAI)
85%
Prompt Engineering
85%
Summarization & Transcription
80%
ML for Business Intelligence
75%
AWS (Lambda, Amplify)
90%
CI/CD (CircleCI)
85%
Observability
85%
Heroku
80%
Auth0
95%
Algolia
85%
Segment
85%
Sentry
85%
FullStory
80%
Experience
Sr. Full Stack Engineer
Revfx
Focused on frontend architecture, authentication, analytics, SEO, and platform reliability.
Key Achievements:
- •Worked with LLMs such as ChatGPT, Anthropic and DeepSeek, specializing in prompt engineering, structured output generation, and function calling.
- •Developed various AI-driven workfl ows, including sales lead generation, list building, hiring signals, custom signals, and lookalike account identifi cation.
- •Developed an AI-powered research copilot that enables users to query comprehensive company information using ChromaDB and CosmosDB, streamlining data retrieval and enhancing decision-making effi ciency.
- •Optimized LLM applications for business automation, improving effi ciency in sales and market intelligence.
- •Built a reusable OAuth login library supporting 50 popular SaaS platforms, including Salesforce, Outreach, Salesloft, HubSpot, Segment, Gmail, and Google Calendar.
- •Designed and implemented OAuth-based integrations for 15 SaaS providers, ensuring seamless data exchange and connectivity.
- •Implemented Zoom meeting summarization and video-to-text transcription for streamlined meeting insights.
- •Delivered quick-action features for SaaS products (e.g., Salesforce, Outreach) to improve task effi ciency, such as email composition and opportunity tracking.
- •Designed a confi guration-driven dynamic form system to streamline data input for various workfl ows
- •Implemented a Retrieval-Augmented Generation (RAG)-based chatbot for a research copilot, enhancing company-specifi c knowledge insights.
Full-Stack Engineer
Loot Discount Inc
Built SaaS integration infrastructure, authentication systems, and AI-powered workflows for sales and company intelligence.
Key Achievements:
- •Designed and implemented a serverless architecture using AWS API Gateway, Lambda, SQS, and SNS for API management and webhooks, leveraging CloudFormation for deployment automation.
- •Utilized AWS Step Functions to design and execute data and collection migration workfl ows from development to production databases.
- •Integrated Stripe Connect for user registration, transfers, and payouts, including handling webhook events for payment processing.
- •Implemented Plaid for seamless bank and card integrations, along with robust webhook consumption for fi nancial transactions.
- •Developed and implemented role-based access control (RBAC) for secure and granular user permissions across the platform.
- •Designed and integrated a directory/search page using Algolia.io, creating custom indexes for dynamic, tailored list displays.
Project Leader
R Systems International
Worked on different projects for clients like dotstudioPro, building SaaS integrations, AI features, and scalable backend systems.
Key Achievements:
- •Created OTT website for dotstudioPro’s partner.
- •Created unit-test and automated e2e testing of React Native android and IOS app using Jest, Enzyme, CircleCI and Detox
- •Improved 10% reduction of time for creating white label website for their new partner
- •Working on creating react-native plugin for partners
- •Developed and successfully deployed web-app, android and ios app using front-end with Flutter and backend with python.
Senior Full-Stack Developer / Tech Lead
Kintry
Led end-to-end architecture and development of Kintry’s platform and mobile apps, delivering scalable SaaS, AI, and real-time systems.
Key Achievements:
- •Designed and built full-stack architecture across web, mobile, and backend services
- •Published 5 apps to Google Play Store (Kintry, Kintry MathG, Kashi Astro, Kcontact)
- •Built sub-domain web-stores for businesses with WhatsApp/SMS ordering, achieving 10% weekly growth
- •Developed Zoom-like video conferencing using WebRTC and Socket.io
- •Implemented ML models for inventory and operational decision-making
- •Led and managed a 10-member team across engineering, sales, and HR
Portfolio Showcase
Explore interactive demos and visual previews of my recent projects, showcasing innovative solutions in AI, SaaS integrations, and full-stack development.
Featured Projects
OTT
A high-performance video streaming platform frontend featuring categorized content and seamless playback interfaces.
Pelicargo
Fullstack logistics management assignment focusing on cargo tracking and service coordination.
Fashion Store (Frontend)
Interactive e-commerce frontend for a fashion brand, featuring product galleries and user-centric design.
Fashion Store (Backend)
Robust backend infrastructure for fashion retail, handling inventory, user accounts, and transactions.
Learning People
Mobile-first educational platform designed to streamline student interaction and learning resources.
Ticket Booking (AISEO)
Frontend implementation of an advanced ticket booking system with optimized SEO and user flows.
Cache Backend (AISEO)
A high-efficiency caching layer for backend services to optimize data retrieval and speed.
Tinder Carousel
Mobile UI component replicating the swipe-based carousel logic for smooth user interactions.
Sakura
Thematic frontend project focusing on clean aesthetics and responsive layouts.