Dhaneshwar Kumar Singh
Senior Software Engineer & Architect specializing in Python (Django, FastAPI, Flask), React.js & Node.js, PHP, enterprise JSON REST APIs, AWS Cloud Deployments (ECS, EC2, S3, RDS, Lambda), Docker Microservices, databases (PostgreSQL, MySQL, MongoDB), and modern LLM/RAG AI Systems.
Proven Projects & Architectures
Real production systems designed, coded, and deployed across e-publishing, SaaS accounting, healthcare LMS, and AI automation.
Duet — Workflow Plugin & Middleware
Engineered an enterprise e-publishing middleware connecting Adobe InDesign and Ellington CMS servers. Implemented complete business logic layer for authentication, content dispatching, database schemas, and Google Drive API integration.
Wowzer — Xero Cloud Accounting Engine
Built an accounting automation platform for bookkeepers and CPAs to backup/restore Xero organizations, duplicate configuration templates across multi-tenant clients, and automatically convert physical invoice receipts into structured accounting data.
Resprop — Event-Driven Serverless Pipeline
Architected serverless AWS Lambda microservices handling webhooks and background event queues. Integrated FreshService, Greenhouse API, and high-performance Scrapy automation for data extraction and system synchronization.
WCEA — Continuing Professional Development LMS
Developed a healthcare education LMS platform featuring Zoom virtual classroom integration, real-time CPD progress tracking, automated certification generation, exam scoring engines, and cross-platform REST APIs for iOS and Android apps.
Enterprise RAG Knowledge Assistant
Implemented a hybrid semantic search and retrieval-augmented generation (RAG) system with ChromaDB vector store, Cohere reranking, and LangChain LCEL chains to enable zero-hallucination querying across enterprise technical manuals.
Allen Career Institute — Video Learning Platform
Engineered video streaming delivery and test-taking portal infrastructure for one of India's premier entrance preparation institutes, integrating Vimeo API, high-throughput MySQL database queries, and secure session management.
High-Signal Technical Writing
In-depth tutorials and architectural breakdowns crafted for engineers and developer-facing brands.
Building Production RAG Systems with LangChain, ChromaDB & LCEL
Comprehensive breakdown of vector indexing, chunking strategies, hybrid retrieval, and LangSmith evaluation metrics.
LangGraph Multi-Agent Workflows: State Graphs vs State Machines
How to build cyclical, fault-tolerant agent graphs that coordinate research, reasoning, and automated code execution.
Deploying Containerized Python & Django on AWS ECS Fargate
Complete DevOps blueprint: Dockerfile optimization, Application Load Balancer setup, RDS PostgreSQL integration, and GitHub Actions CI/CD.
Have a Project or Consulting Need?
Whether you need an AI automation pipeline built, a backend scaled on AWS, or high-quality technical documentation for your product, let's connect.