HackerCompliment

AI-powered interview preparation platform for Indian students and freshers.

HackerEarth helps companies test candidates. HackerCompliment helps candidates pass those tests.

---

What is HackerCompliment?

HackerCompliment is a full-stack AI interview prep platform built for college students and freshers targeting top Indian and global companies — TCS, Wipro, Infosys, Amazon, Google, Deloitte, PayPal, Intuit, GlobalLogic, Trimble, and 120+ more.

It combines real interview questions sourced from Reddit, Glassdoor, and GFG with AI-powered evaluation, voice-based mock interviews, coding practice, and resume analysis — all in one platform.

---

Features

🎯 AI Interview Simulator

• Practice with 500+ real interview questions from 120+ companies
• Never-repeat question system (tracks your history per company/role)
• Groq AI evaluates every answer with a score, detailed feedback, and improvement tips
• Supports HR, Technical, Behavioral, Coding, and System Design rounds

🎙️ AI Mock Interview (Voice)

• Adam (ElevenLabs) asks questions out loud — feels like a real interview
• Answer by voice (Deepgram speech-to-text) or typed text
• Addressed by your first name throughout ("So Mahadev, tell me about yourself...")
• Real-time filler word detection (um, uh, basically, you know, etc.)
• Adaptive follow-up questions if your score is below 7/10
• Final report with round-by-round breakdown and top 3 areas to improve

💻 Coding Practice

• Monaco Editor (same as VS Code) in the browser
• JDoodle code execution — supports Python, Java, C++, JavaScript
• OpenRouter DeepSeek AI evaluates your solution quality
• DSA problems sourced from real company interviews

📄 Resume Analyzer

• Upload your PDF resume — AI scores each section
• Fix My Resume — AI rewrites weak sections
• JD Match — paste any job description and get a match score

🏢 Real Question Pipeline

• Automated ingestion from Reddit (r/cscareerquestions, r/cscareerquestionsIN) and GFG RSS every 6 hours
• Groq extracts company, role, round, and question from raw experiences
• Admin review dashboard — approve to question bank, reject to delete
• User-submitted interview experiences feed the same pipeline

💳 Payments

• Razorpay integration (test + live mode)
• Free: 3 interview + 3 coding sessions per week
• Basic (₹99): 3 extra sessions | Standard (₹199): 8 extra | Boost (₹299): unlimited 7-day | Pro (₹599/month): unlimited

🔐 Authentication

• Email/password + Google OAuth
• Email verification enabled
• Protected routes with Supabase SSR middleware

---

Tech Stack

Layer	Technology
Frontend	Next.js 15 + TypeScript + Tailwind CSS
Backend	Next.js API Routes
Database	Supabase (PostgreSQL) — Mumbai region
Auth	Supabase Auth (Email + Google OAuth)
AI — Interviews	Groq API — llama-3.3-70b-versatile
AI — Code Eval	OpenRouter — deepseek/deepseek-r1:free
AI — Pipeline	Groq API — llama-3.3-70b-versatile
Voice — TTS	ElevenLabs (Adam voice)
Voice — STT	Deepgram (nova-2, en-IN)
Code Execution	JDoodle API
Payments	Razorpay
Code Editor	Monaco Editor
Deployment	Vercel

---

Getting Started

Prerequisites

• Node.js 18+
• A Supabase project
• API keys for Groq, Razorpay, ElevenLabs, Deepgram, JDoodle, OpenRouter

Installation

git clone https://github.com/mahadev-ambadi/HackerCompliment.git
cd HackerCompliment
npm install

Environment Variables

Create a .env.local file in the root directory:

NEXT_PUBLIC_SUPABASE_URL=your_supabase_project_url
NEXT_PUBLIC_SUPABASE_ANON_KEY=your_supabase_publishable_key
SUPABASE_SERVICE_ROLE_KEY=your_supabase_secret_key

GROQ_API_KEY=your_groq_key

RAZORPAY_KEY_ID=your_razorpay_key_id
RAZORPAY_KEY_SECRET=your_razorpay_secret
NEXT_PUBLIC_RAZORPAY_KEY_ID=same_as_razorpay_key_id

OPENROUTER_API_KEY=your_openrouter_key

JDOODLE_CLIENT_ID=your_jdoodle_client_id
JDOODLE_CLIENT_SECRET=your_jdoodle_secret

ELEVENLABS_API_KEY=your_elevenlabs_key
ELEVENLABS_VOICE_ID=your_elevenlabs_voice_id

DEEPGRAM_API_KEY=your_deepgram_key

CRON_SECRET=your_cron_secret

⚠️ Never commit .env.local to GitHub. It is already in .gitignore.

Run Locally

npm run dev

Open http://localhost:3000

---

Project Structure

app/
├── page.tsx                    # Landing page
├── login/                      # Login (email + Google OAuth)
├── signup/                     # Signup
├── dashboard/                  # User dashboard
├── interview/                  # AI Interview Simulator
├── mock-interview/             # AI Mock Interview (voice)
├── practice/                   # Coding Practice
├── resume/                     # Resume Analyzer
├── pricing/                    # Pricing + Razorpay
├── profile/                    # User profile + history
├── history/                    # Interview history
├── share-experience/           # Submit interview experience
├── admin/
│   ├── review/                 # Review + approve questions
│   ├── problems/               # Review + publish DSA problems
│   └── analytics/              # Platform analytics
├── api/
│   ├── evaluate/               # Groq interview evaluation
│   ├── questions/              # Fetch questions (never-repeat)
│   ├── mock-questions/         # Fetch questions for mock interview
│   ├── mock-evaluate/          # Groq mock interview evaluation
│   ├── voice/speak/            # ElevenLabs TTS
│   ├── voice/transcribe/       # Deepgram STT
│   ├── execute-code/           # JDoodle code execution
│   ├── evaluate-code/          # OpenRouter code evaluation
│   ├── analyze-resume/         # Resume PDF analysis
│   ├── session-limit/          # Interview session tracker
│   ├── coding-session-limit/   # Coding session tracker
│   ├── payment/                # Razorpay order + verify
│   └── cron/                   # Automated pipelines
└── auth/callback/              # Google OAuth callback

lib/
├── supabase/                   # Supabase clients (browser, server, admin, SSR)
├── admin.ts                    # Admin whitelist
├── rateLimit.ts                # In-memory rate limiter
└── sessions.ts                 # Session helpers

---

Automated Pipelines

Pipeline	Schedule	Description
Ingest questions	Every 6 hrs	Reddit + GFG RSS → raw_experiences
Extract questions	Every 6 hrs +30m	Groq extracts questions → review queue
Ingest problems	Every 8 hrs	Reddit + Codeforces → raw_problems
Extract problems	Every 8 hrs +30m	Groq extracts DSA problems → review queue

Trigger manually during development:

GET /api/cron/ingest
GET /api/cron/extract
GET /api/cron/ingest-problems
GET /api/cron/extract-problems

---

Deployment (Vercel)

1. Push to GitHub
2. Import repo on vercel.com
3. Add all environment variables in Vercel dashboard
4. Update Supabase Auth redirect URLs to your production domain
5. Add production domain to Google Cloud Console OAuth credentials
6. Verify all 4 cron jobs appear in Vercel → Settings → Cron Jobs

---

Security

• Supabase Row Level Security (RLS) enabled on all user-facing tables
• Admin access restricted by user ID whitelist (lib/admin.ts)
• API routes protected with bearer token + supabase.auth.getUser()
• Cron endpoints protected with x-cron-secret header
• In-memory rate limiter: 10 requests/minute per user
• All secrets stored in .env.local — never committed to Git

---

Built By

Mahadev Ambadi SS
Christ University, Bengaluru
GitHub

---

License

This project is proprietary and not open for redistribution.
© 2026 HackerCompliment. All rights reserved.