Freelancers using Matplotlib in GhaziabadFreelancers using Matplotlib in Ghaziabad
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Shrisha 's avatar
Shrisha
Ghaziabad, India
Aspiring dev crafting practical, reliable systems.
New to Contra
Aspiring dev crafting practical, reliable systems.
Cover image for Deepfake Detection System Problem: Deepfake accessibility
Deepfake Detection System Problem: Deepfake accessibility creates real risks—misinformation, identity fraud, digital trust erosion. I built a production-grade detector: fast, accurate, explainable, CPU-deployable. Approach: Transfer learning with ResNet-50 (25.5M params, pre-trained ImageNet-1K V2). Rather than training from scratch on limited data, I leveraged rich hierarchical features that transfer exceptionally well to detecting artifact patterns (blending boundaries, color mismatches, compression artifacts). Key Decisions: Face-Centric Preprocessing: OpenCV DNN crops faces to 224×224, concentrating attention on artifact-rich regions (eyes, mouth, jawlines). Custom Classification Head: Bottleneck design (2048→512→1) with Focal Loss, label smoothing, progressive unfreezing—prevents overfitting on ~4,000 Ciplab images. Explainable AI: Custom Grad-CAM generates attention heatmaps showing exactly where the model detected artifacts. Real-World Robustness: Trained on JPEG compression, Gaussian noise, blur augmentations to handle compressed video feeds. Results: AUC-ROC: 0.9424 | Accuracy: 87.25% | Precision/Recall: 87.27%/84.81% Inference: <100ms per face on CPU Live on Hugging Face Spaces (no GPU) Tech: PyTorch, OpenCV, Albumentations, Gradio. Images, videos, live webcam—one codebase. Demonstrates: End-to-end AI engineering with deliberate trade-offs (efficiency over raw accuracy), training discipline (Focal Loss, Cosine Annealing), and production-first thinking (CPU compatibility, interpretability, real-world robustness). Demo: https://huggingface.co/spaces/Shri04/deepfake-detector
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Cover image for JobTracker AI — AI-Powered Job Application Tracker
JobTracker AI — AI-Powered Job Application Tracker
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Cover image for Government School ERP System —
Government School ERP System — Full-Stack Platform for a Real Government School Client Designed and built a bilingual, full-stack ERP system for a government school in Uttar Pradesh — replacing paper attendance registers, handwritten admission forms, and manual Mid-Day Meal logs with a secure, role-based digital platform. Architected the full data layer — a 25+ model relational schema (PostgreSQL + Prisma) mapped directly from the client's actual government paperwork, including India's UDISE+ admission forms and Form-34 Transfer Certificates, not a generic template. Built defense-in-depth security — role-based access control enforced at the server layer (not just route guards), brute-force account lockout, and a login system designed around a real constraint: students without personal phones authenticate by admission number instead. Shipped a bilingual UI from day one — Hindi and English throughout, using next-intl, so the interface actually works for the people using it, not just the developer testing it. Automated the admission pipeline end-to-end — a 30+ field digital intake form (photo + document uploads to cloud storage) that auto-generates student accounts and credentials in a single atomic transaction. Still actively building — Mid-Day Meal tracking and automated report card generation are next. Open to freelance and contract work where someone needs to own both the system architecture and the day-to-day execution. If it's real, complex, and needs to actually ship — let's talk.
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Cover image for Full-Stack AI-Powered Job Search Platform |
Full-Stack AI-Powered Job Search Platform | Next.js · TypeScript · PostgreSQL · Groq AI · n8n Built a production-ready web application to help job seekers manage their entire job hunt in one place — replacing messy spreadsheets with an intelligent, automated pipeline. Developed a drag-and-drop Kanban board tracking applications across 6 stages (Applied → Offer → Rejected) with real-time updates Integrated Groq LLaMA 3.3 70B via n8n automation workflows to power an AI chat assistant that lets users query and update their pipeline conversationally Built an ATS Resume Scorer — paste any JD to get a 0–100 match score, keyword gap analysis, strengths/gaps breakdown, and interview likelihood rating Built an AI Resume Tailor with two modes: section-by-section suggestions and a full ATS-optimised rewrite — output downloadable as .txt Implemented Google OAuth auth, serverless PostgreSQL (Neon), PDF resume parsing, and JD auto-extraction — all at $0/month infrastructure cost Stack: Next.js 16 · TypeScript · Prisma · PostgreSQL (Neon) · Groq API · n8n · NextAuth.js · Docker
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Matplotlib(1)
Pratik Bhambri's avatar
Pratik Bhambri
Dadri, India
Data Scientist: Python, RStudio, ML, BI, NLP, DL, LLM
Data Scientist: Python, RStudio, ML, BI, NLP, DL, LLM
Cover image for Portfolio Optimization Project
Portfolio Optimization Project
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Cover image for Customer Segmentation Project
Customer Segmentation Project
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Cover image for Stock Prediction from Time Series
Stock Prediction from Time Series
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Cover image for "AI-Powered Fraud Detection System | 99.96% AUC"
"AI-Powered Fraud Detection System | 99.96% AUC"
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Matplotlib(2)
Vaibhav Kumar's avatar
Vaibhav Kumar
Delhi, India
Building AI, ML & data-driven solutions with Python.
New to Contra
Building AI, ML & data-driven solutions with Python.
Cover image for Bitcoin Market Sentiment and Trader Performance Analysis
Bitcoin Market Sentiment and Trader Performance Analysis
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Cover image for AI-Powered QMS for Complaint Management
AI-Powered QMS for Complaint Management
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Cover image for AI vs Human Text Classification Using BERT
AI vs Human Text Classification Using BERT
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Cover image for Medical Insurance Cost Prediction
Medical Insurance Cost Prediction
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Matplotlib(1)
Divyansh Singh Parihar's avatar
Divyansh Singh Parihar
Delhi, India
Engineer who ships clean, functional, and scalable web apps.
Engineer who ships clean, functional, and scalable web apps.
Cover image for Intelligent Memory-Based Obfuscated Malware Detector
Intelligent Memory-Based Obfuscated Malware Detector
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Cover image for 8-Bit UI Kit: Retro-Inspired Web Design System
8-Bit UI Kit: Retro-Inspired Web Design System
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Cover image for DoContent - AI Content Generator Tool
DoContent - AI Content Generator Tool
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Matplotlib(1)
Nishita .'s avatar
Nishita .
Faridabad, India
AI & Data Solutions, Insightful Analysis
AI & Data Solutions, Insightful Analysis
Cover image for GitHub - Nishita76/Retail-Customer-Clustering
GitHub - Nishita76/Retail-Customer-Clustering
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Cover image for Django-NLP-News-Summarization
Django-NLP-News-Summarization
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Cover image for GitHub - Nishita76/Customer-Churn-Prediction: IBM Telco custome…
GitHub - Nishita76/Customer-Churn-Prediction: IBM Telco custome…
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Matplotlib(1)