Sunidhi Singh

Full Stack Software Engineer

India 0+ yrs exp 80 · Excellent

About

Computer Science graduate and full stack software engineer with hands-on experience building Python and TypeScript/React applications, designing RESTful API architecture with Node.js and Express.js, and integrating Large Language Models (LLMs) into production-style workflows using LangChain and Retrieval-Augmented Generation (RAG). Practiced in software engineering fundamentals — input validation, error handling, structured debugging, and systematic testing — with a strong focus on data controls, user experience, and cross-functional collaboration. Self-directed learner who quickly adopts new frameworks and applies a risk-and-control mindset to translate business requirements into reliable, well-tested applications.

Skills & Expertise (25)

LangChain Advanced

8.5/10

Years Exp

Prompt Engineering Advanced

8.5/10

Years Exp

Generative AI Advanced

8.5/10

Years Exp

Postman Advanced

8.0/10

Years Exp

Typescript Advanced

8.0/10

Years Exp

React.js Advanced

8.0/10

Years Exp

VS Code Advanced

8.0/10

Years Exp

GitHub Advanced

8.0/10

Years Exp

Git Advanced

8.0/10

Years Exp

Node.js Advanced

8.0/10

Years Exp

Express.js Intermediate

7.5/10

Years Exp

JWT-based Authentication Intermediate

7.5/10

Years Exp

Vercel Intermediate

7.0/10

Years Exp

Testing & Debugging Intermediate

7.0/10

Years Exp

Code Quality Intermediate

7.0/10

Years Exp

Software Architecture Intermediate

7.0/10

Years Exp

Object-Oriented Programming Intermediate

7.0/10

Years Exp

CSS3 Intermediate

7.0/10

Years Exp

HTML5 Intermediate

7.0/10

Years Exp

Python Intermediate

6.5/10

Years Exp

REST API design Role-Based Access Control (RBAC UI Responsive Web Design Javascript (ES6+

Work Experience

Full Stack Developer

LeaveFlow

Jul 2026 - Jul 2026

Designed and built REST API architecture in Node.js integrating an LLM-powered assistant with organizational data, enabling automated, natural-language access to role-based employee/manager workflows. Implemented request validation and structured error handling across API endpoints to improve reliability and reduce unhandled edge cases in production-style scenarios. Debugged and refined system behavior through iterative testing, tracing issues across API and application layers to strengthen data controls and end-to-end correctness. Verified the complete leave application → approval flow, including role-based access edge cases, ensuring accurate governance of user permissions.

Backend Developer

ZEnvy

Jun 2026 - Jun 2026

Built backend logic connecting a LangChain-based LLM chatbot service to a React/TypeScript front end, enabling automated conversational assistance and maintaining consistent behavior across the client-server boundary. Evaluated LLM system outputs against expected behavior, systematically documenting and resolving discrepancies found during iterative testing to improve decision-making accuracy. Wrote structured, reviewable, object-oriented code with attention to maintainability and software architecture as the feature set grew.

Full Stack Developer

QuizMaster

May 2026 - Jun 2026

Implemented JWT-based authentication and role-based access control (RBAC) for Admin/User dashboards, covering both expected and edge-case scenarios to strengthen application security and governance. Built and tested RESTful APIs with input validation and error handling for a real-time quiz engine (timers, auto-submission, scoring), verifying behavior with Postman. Applied structured, repeatable testing practices across the full client-server pipeline to catch regressions before release, reinforcing a risk-and-control approach to quality.