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shailendra singh

@spss-connect

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Senior full stack developer at Catalyst IT building AI-powered workflow automation with GPT-4o, RAG, and LangGraph.

India

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At Catalyst IT, I designed and implemented an AI-powered workflow orchestration layer for PEM 2.0, using GPT-4o to generate workflows and business rules and automate tasks. I also built RAG pipelines grounded in accreditation rules and documents, with safeguards and real-time execution updates.

At LearningMate Solutions, I designed a semantic search and RAG platform across 50K+ learning assets and developed AI inference services for the edio learning platform. Earlier, I contributed to digital platforms for British Airways, Aer Lingus, and Flydubai, and led a 15-engineer distributed team.

Experience

Work history, roles, and key accomplishments

Current

Technical Consultant | Senior Full Stack Developer / Technical Lead

Current

Catalyst IT

May 2025 - Present (1 year 5 months)

Designed and implemented an AI-powered workflow orchestration layer using OpenAI GPT-4o, built RAG pipelines, and integrated LangChain/LangGraph for multi-step agent workflows. Optimized LLM inference and deployed AI-enabled services on AWS with Docker and CI/CD.

React TypeScript React Flow Redux toolkit .NET NodeJS Python fastAPI OpenAI GPT 4o Lang Chain LangGraph RAG Tool calling WebSockets Redis AWS Docker

Solution Architect | Senior Full Stack Developer

LearningMate Solutions

Feb 2023 - May 2025 (2 years 3 months)

Designed and implemented an enterprise semantic search and RAG platform across 50K+ learning assets, built end-to-end document ingestion and retrieval pipelines, and developed Python/FastAPI services for AI inference. Containerized AI services with Docker/Kubernetes and implemented production monitoring.

React Angular TypeScript .NET Core NodeJS Python fastAPI OpenAI Embeddings LLM RAG Semantic Search PostgreSQL SQL Server MongoDB Redis Docker Kubernetes AWS Azure

Technical Consultant | Senior Full Stack Developer

KSJ Recruitment Pvt Ltd

Aug 2021 - Jan 2023 (1 year 5 months)

Re-engineered a legacy vendor management platform into a modular Angular + Node.js architecture, improving performance by 45%. Developed real-time supplier onboarding and contract lifecycle workflows, and established Docker/Jenkins CI/CD practices. Also developed an AWS serverless lending platform and led migration to serverless MERN architecture.

Angular NodeJS ExpressJS SQL Server Power BI Embedded Jest Cypress Docker Jenkins React AWS Lambda API Gateway MongoDB Python scikit learn Stripe PayPal GraphQL Contentful Redis

Technical Consultant | Architect

Catalyst IT

Feb 2015 - Aug 2021 (6 years 6 months)

Led full-stack solution delivery for digital platforms supporting three global airlines and processing 1M+ daily transactions. Developed cloud-native microservices with 99.99% availability, reusable React/Angular components, and OAuth 2.0/JWT identity architecture. Led a 15-engineer distributed team.

.NET Core NodeJS Angular React TypeScript OAuth JWT SQL Server Redis Material UI SASS Docker Jenkins Jasmine Karma

Team Leader | Senior Software Developer

Smart Chip Ltd

Apr 2011 - Jan 2015 (3 years 9 months)

Developed mission-critical identity verification and financial inclusion applications supporting large-scale Aadhaar enrollment and banking workflows. Designed distributed offline/online synchronization across 500+ regional data centers and led an 8-engineer development team.

Angular AngularJS .NET MVC WCF C#SQL Server