Senior Full-Stack Architect (NestJS, GenAI, AWS)

RAJNEESH KUMAR SINGH

Technical Lead & Solution Architect

NestJS · Node.js · React · Angular - GraphQL · GenAI/LLM · AWS · 10+ Years

+91-978******* ***********@*****.*** Jaipur, Rajasthan, India linkedin.com/in/rajneesh-kumar-singh-6316bb44 https://rajneeshsikriwal.github.io/portfolio/

10+

Years IT Experience

10+

Engineers Led

30+

Global Projects Delivered

10+

Countries Served

AWS+GenAI

Cloud & AI Stack

PROFILE SUMMARY

Results-driven Technical Lead and Full-Stack Developer with 10+ years of IT experience, including 8+ years as a Backend Developer with specializing in Node.js development, architecting and delivering enterprise web applications for global clients across the US, UK, and Canada. Proven track record leading technical teams of 10+ engineers, building scalable backends on NestJS, Node.js, Express, and GraphQL, and shipping production-grade GenAI features using LLM integrations and Model Context Protocol (MCP). Hands-on experience with AWS server administration (EC2, S3, SES, SNS, Auto Scaling) and a broad third-party API and payment-gateway integration background, making me a reliable, end-to-end technology partner for product delivery.

CORE COMPETENCIES

Leadership & Delivery

Technical Leadership · Solution Architecture · Team Mentoring (10+ engineers) · Agile Delivery · Stakeholder Management AI, GenAI & Automation

ChatGPT · Claude · Google Gemini API · GitHub Copilot · Cursor, Kiro, · LLM Integration · Prompt Engineering · Model Context Protocol (MCP) · RAG Pipelines

Backend & APIs

Node.js · Express · NestJS · TypeORM / Sequelize · PHP

(Laravel/CakePHP/Codeigniter) · GraphQL · REST APIs · Redis / Caching

Cloud & Server Administration

AWS (EC2,ECS, RDS, Lambda, S3, SES, SNS) · Elastic IP · Auto Scaling · GitHub / GitLab CI · Windows · Linux

Frontend & Design

Angular · React · MEAN / MERN Stack · JavaScript / jQuery · HTML · CSS · Bootstrap

Databases

MySQL · MongoDB · PostgreSQL

Payment Gateways

Stripe · PayPal · 2Checkout · PayTab · Mepspay · In-App Purchases Dev Tools

VS Code · Source Tree · FileZilla · PuTTY · WinSCP · Notepad++ · Dreamweaver · NetBeans

PROFESSIONAL EXPERIENCE

Technical Lead / Sr. Software Developer Role · Konstant Infosolutions Pvt. Ltd. Jun 2015 – Sep 2026 Jaipur, India (Remote for US/UK clients)

● Architecting enterprise solutions for US/UK clients using NestJS, Node.js, React, and GraphQL across multiple concurrent engagements.

● Integrating GenAI capabilities — LLM APIs and Model Context Protocol (MCP)-based tool orchestration — to modernize legacy systems and accelerate delivery.

● Owning AWS server administration and infrastructure (EC2,ECS, LAMDA, S3, SES, SNS, Elastic IP, Auto Scaling) supporting production workloads for global clients.

● Mentoring developers, conducting code reviews, and setting architecture and engineering standards across project teams.

● Partnering directly with overseas stakeholders to translate business requirements into scalable technical roadmaps. FLAGSHIP PROJECTS (TOP 3)

Knock Knock Pros — Onsite Service Marketplace (USA) 2025 – 2026

● Built an onsite service marketplace connecting service providers with customers, covering provider onboarding, booking, and job management.

● Designed scalable backend APIs and data models using the NestJS/Node.js stack to support real-time provider-customer matching.

● Collaborated with US-based stakeholders to shape product features and prioritize the delivery roadmap. MatchCreatorz — Digital Job-Matching Platform (USA) 2024 – 2025

● Developed a digital job-matching platform connecting US-based clients with onsite project professionals.

● Implemented core matching and listing workflows, focusing on usability and reliable data handling.

● Worked cross-functionally with product and design to refine the end-to-end user journey. Fitsentive — Fitness Rewards Application

2022 – 2023

● Built a fitness rewards application using Node.js, Sequelize, and MySQL to track user activity and incentives.

● Designed relational data models and reward-calculation logic to support engagement-based rewards.

● Delivered the application end-to-end, from architecture through deployment. ADDITIONAL PROJECT EXPERIENCE

Offleashd (USA): Social platform for pet owners.

Gozaround (Canada): Community humanitarian aid platform. Hapinen – Events & Things To Do (Mobile App): Discover and share local events with friends and family — built with Node.js and MongoDB. CleanLine – Laundry Made Easy (Mobile App): On-demand laundry booking solution for customers — built with Node.js and MongoDB. MTACTAC (Web Platform): Progressive Web App (PWA) for a proofreading services provider — built with Node.js, Angular, and MongoDB. Oyraa (Global Platform): Online platform connecting professional interpreters with businesses worldwide — built with Express.js and MongoDB. Dissertation Home Work (UK): Academic writing services platform — built with PHP and MySQL. INDUSTRIAL TRAINING

Industrial Intern (PHP) · MG Technosavy Pvt. Ltd.

6 Weeks Jaipur, India

● Developed an Online Examination Project using PHP and MySQL. EDUCATION, CERTIFICATIONS & LANGUAGES

EDUCATION

B.Tech (CSE) — RTU, 2011

Class XII & X — Bihar Board

LANGUAGES

Hindi — Native

English — Professional Proficiency

CERTIFICATIONS

PHP Certified — Jan 2010

AutoCAD Foundation — CADD Centre, Jaipur

Certificate of Completion — Claude Code Action

Certificate of Participation — AWS Community Day

PERSONAL DETAILS

DOB: 05 Mar 1990

Status: Married, Alt. Email: *************@*****.***

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