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Case Study 5 of 6
Live Enterprise ClientEnterprise SaaS & HR TechYear: 2025 - Present

CurioTeach Careers

Enterprise Hiring, Digital Contract Signing & Intern Lifecycle Platform

A custom HR and internship lifecycle platform for Curio (Vyma Learning Systems Pvt Ltd) built with React, Node.js, Express, and Tailwind CSS, featuring cryptographic digital signatures, Brevo SMTP transactional emails, offer letter generation, BoD scheduling, task tracking, and 50+ onboarded interns.

Visit Live PlatformRole: Sole Full-Stack Developer & Systems Architect
https://careers.curioteach.com
Online
CurioTeach Careers Mini Feature Screenshot

"End-to-end intern onboarding, cryptographic NDA signing, and BoD management for Curio."

Core Design Question
"How can we automate multi-cohort hiring, legally seal NDAs with digital signatures, and provide executive BoD governance on a single unified platform?"
Strategic Brand Promise

End-to-end intern lifecycle management with cryptographic proof, automated compliance, and seamless executive governance.

Full Production Interface Overview

Open careers.curioteach.com
CurioTeach Careers — Production Capture (careers.curioteach.com)
CurioTeach Careers Full Production Screenshot

The Problem & Business Context

Managing intern hiring, manual offer letters, physical NDA signing, attendance logging, and completion certificate generation across multiple cohorts caused administrative bottlenecks and compliance risks.

The Engineered Solution

Single-handedly designed, built, and deployed an end-to-end hiring portal using React, Node.js, Express, and Tailwind CSS. Features cryptographic digital signatures for NDAs/offer letters, Brevo SMTP email notifications, separate Intern & BoD executive portals, automated meeting broadcasts, and task tracking.

End-to-End User Journey

Experience Architecture & Customer Flow

Phase 01

Application

Candidate applies and moves through structured evaluation.

Phase 02

Signing

Recipient signs NDA digitally with SHA-256 cryptographic hash seal.

Phase 03

Onboarding

Instant access to Intern portal with task board, resources, and BoD calendar.

Phase 04

Completion

Automated generation and verification of official internship certificates.

Visual Identity & Materiality

Design System & Editorial Material Harmony

Core Color Tokens

Emerald SaaS
#10B981
Verification & Operational Status
Executive Slate
#0F172A
Portal Framework Canvas
Titanium Text
#E2E8F0
High-Legibility Interface Copy
Amber Hash
#F59E0B
Cryptographic Hash & Security Seals

Typography Strategy

Plus Jakarta Sans (Executive Dashboard & Intern Portal)
JetBrains Mono (Cryptographic Document Hashes & Verification IDs)
Strategic Rationale

Why Specific Decisions Were Made

React, Node.js & Express Monolithic Separation

Engineered a clean separation of concerns with a fast React/Tailwind client and robust Node.js/Express API handling auth, crypto hashing, and database transactions.

Brevo SMTP Transactional Email Automation

Automated real-time delivery of digitally signed offer letters, NDA execution confirmations, and BoD meeting invitations through Brevo's dedicated SMTP relay.

Cryptographic SHA-256 Document Verification

Ensured legal integrity and zero tampering for digital NDA agreements and offer letters.

Dual-Portal Role Separation

Engineered separate UI workspaces for interns (tasks, resources, attendance) and BoD members (governance, approvals, scheduling).

System Architecture & Implementation

Full-stack architecture built with React and Tailwind CSS frontend, Node.js and Express backend REST API, secure authentication, SHA-256 cryptographic document hashing and digital signatures, Brevo SMTP transactional email engine for automated offer letters and meeting notifications, server-side PDF generation, and Hostinger VPS deployment with Nginx.

Verified Production Benchmarks

50+ Active
Interns Onboarded
SHA-256 Hash
Document Verification
Brevo SMTP
Email Delivery
100% Live
Production Status

Key Capabilities & Deliverables

Built with React, Node.js, Express, and Tailwind CSS for rapid, scalable enterprise operations
Brevo SMTP transactional notification pipeline dispatching offer letters, contract execution confirmations, and BoD meeting broadcasts
Cryptographic digital signature & document hash verification for NDA agreements and offer letters
Dual-portal architecture: Intern workspace and BoD (Board of Directors) executive command center
BoD meeting scheduler, attendance tracking, task delegation, and automated broadcast notifications
Automated milestone tracking and verifiable completion certificate generation

Technology Stack

ReactNode.jsExpressTailwind CSSBrevo SMTPPostgreSQLDigital Signatures / CryptoNginx & Hostinger VPS
Verified Production Architecture
Verified Founder Endorsement

I had the pleasure of working with Jatin as a Full Stack Developer, and I highly recommend him for his technical skills, dedication, and problem-solving abilities.

During his time with our team, Jatin consistently delivered quality work across both frontend and backend development. He was proactive in understanding project requirements, implementing scalable solutions, and ensuring smooth functionality throughout the development process.

What stood out the most was his ability to learn quickly, adapt to challenges, and maintain a positive and collaborative attitude while working with the team. His contributions played an important role in improving our platform and development workflow.

I truly appreciate his efforts and wish him continued success in his future opportunities.

JK

Jesa Kodiyatar

Founder, CURIO.AI

Managing Director, Vyoma Learning Systems Pvt. Ltd.