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Arnaldo Matute's avatar
Arnaldo Matute
proColombia
Data Analysis & Modeling within the reach of SMEs
$1k+
Earned
2x
Hired
5.0
Rating
9
Followers
Data Analysis & Modeling within the reach of SMEs
Cover image for Nuclear And Carbon
Nuclear And Carbon
1
44
Cover image for Energetic Overview EMENA Region
Energetic Overview EMENA Region
3
74
Cover image for Contents creation for training and concept delivery
Contents creation for training and concept delivery
1
45
Cover image for Coursera: Data Analytics for Lean Six Sigma
Coursera: Data Analytics for Lean Six Sigma
1
93
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Manideep racharla's avatar
Manideep racharla
Overland, USA
Data Analyst turning Data insights into business impact.
5.0
Rating
2
Followers
Data Analyst turning Data insights into business impact.
Cover image for Predictive Analysis of Airline Delays Using Machine Learning
Predictive Analysis of Airline Delays Using Machine Learning
0
8
Cover image for Parking Lot Utilization Analysis Dashboard
Parking Lot Utilization Analysis Dashboard
2
44
Cover image for Optimizing Home Delivery in Small Grocery Stores
Optimizing Home Delivery in Small Grocery Stores
0
8
Cover image for Stock Price and Trading Indicators Analysis
Stock Price and Trading Indicators Analysis
0
6
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Molka B's avatar
Molka B
Tunis, Tunisia
AI & QA Automation Engineer | AI Bias Audit& Web/App Testing
13
Followers
AI & QA Automation Engineer | AI Bias Audit& Web/App Testing
Cover image for AI Bias & Fairness Audit
AI Bias & Fairness Audit – Retail Object Detection Model My role: AI Bias & Fairness Auditor | ML Risk & Compliance Analyst Project description: Conducted a full AI Bias & Fairness audit on a retail object detection model using demographic evaluation (gender-based analysis). Measured Disparate Impact, Statistical Parity, Equal Opportunity Difference, and performed statistical significance testing (Chi-Square). Identified category-specific bias and business risk impact. Implemented mitigation via threshold calibration and reweighting. Delivered a professional compliance-ready report with risk matrix and mitigation roadmap.
2
98
Cover image for AI Bias Detection & Mitigation
AI Bias Detection & Mitigation Tool for Hiring Models My role: AI/ML Engineer & Fairness Auditor Project description: AI Bias Detection and Mitigation Framework for Recruitment Systems. Built a complete, production-ready tool that: Detects gender, race, and age bias in hiring ML models Uses industry-standard fairness metrics (Disparate Impact, Demographic Parity, Equal Opportunity) Applies Reweighing mitigation (AIF360) → improves fairness while keeping accuracy loss < 2% Includes interactive Gradio demo for live testing Full business impact section + compliance notes (EEOC 4/5th rule, GDPR, EU AI Act)
1
168
Cover image for E-commerce Automation Framework My role :
E-commerce Automation Framework My role : Test Automation Engineer (UI & API) Project description: Designed and developed a comprehensive automated testing framework for an e-commerce website. The framework covers UI automation using Selenium WebDriver and Pytest, alongside robust API testing to ensure backend reliability. It enables fast, repeatable test execution with detailed reporting to quickly identify issues.
2
139
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QA Test Summary Report – SaaS Platform Release My role : QA Engineer / Test Lead Project description: Executed risk-based QA testing for a SaaS platform (v1.0.1), focusing on Authentication, RBAC, and User Dashboard. Identified critical security vulnerabilities, session integrity failures, and major functional defects. Delivered a professional test summary report with defect metrics, exit criteria validation, and actionable recommendations. Ensured the client had a clear release decision and mitigation plan, improving software reliability and compliance.
1
126
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Ammar Tahir's avatar
Ammar Tahir
Sahiwal, Pakistan
UI/UX Designer crafting intuitive, modern digital experience
New to Contra
UI/UX Designer crafting intuitive, modern digital experience
Cover image for Football Mobile App - Sports UI Design
Football Mobile App - Sports UI Design
1
4
Cover image for We design MVP apps that
We design MVP apps that help startups move fast, validate ideas, and launch with confidence. Our focus is on building only what matters—clear user flows, essential features, and a product experience that’s easy to understand and test.
0
32
Cover image for Music creation experience designed to
Music creation experience designed to make producing music feel simple, fast, and distraction-free. The concept explores a smooth workflow for creating beats, generating music with AI, discovering sounds, and managing projects—all within a minimal and intuitive interface. The visual direction combines soft neutrals, bold orange accents, rounded cards, and spacious layouts to create a friendly yet premium music-production experience. Designed with a focus on simplicity, discoverability, and effortless music creation.
0
36
Cover image for A modern personal finance mobile
A modern personal finance mobile app designed to give users a clear view of their money in one place. The experience combines account balances, cards, recent transactions, deposits and withdrawals with visual expense tracking across categories like groceries, travel, health, and shopping. Bold gradients and data-driven visuals bring a distinctive identity to an otherwise practical everyday banking experience.
0
37
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Ciro 's avatar
Ciro
Buenos Aires, Argentina
Go to sleep, may your sweet dreams come true...
270
Followers
Go to sleep, may your sweet dreams come true...
Cover image for Award season meets analytics — and it all comes to a head th...
Award season meets analytics — and it all comes to a head this Sunday, January 11, when the Golden Globes 2026 ceremony takes place in Los Angeles. To celebrate, I built a full-stack data project exploring the 2026 Golden Globes movie nominations, starting with a custom CSV dataset featuring: 🎬 Movie, Director, Genre, Nominations 🍅 Tomatometer, 🍿 Popcornmeter, Metascore Approval & User Score From there, I created: 📊 Python visualizations with Matplotlib & Seaborn 🍩 Power BI Donut Charts showing genre distribution and metascore approval This project combines technical depth with cultural relevance, showing how data can illuminate trends in film recognition and audience reception. Read my Article on Medium ➡️ Article (https://medium.com/@ciroduro01/golden-globes-2026-a-data-driven-look-at-the-movie-nominations-8df7a40e84b1)
2
18
1K
Cover image for Customer Segmentation Analysis for Online Retail
Customer Segmentation Analysis for Online Retail
2
14
Cover image for Heritage Soil Station: A NZ Website
Heritage Soil Station: A NZ Website
5
20
Cover image for Gardens of the World: Full-Stack Web App/Website
Gardens of the World: Full-Stack Web App/Website
6
23
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Umar Shaikh's avatar
Umar Shaikh
Pune, India
Data Scientist, Backend Engineer, Data Analyst
10
Followers
Data Scientist, Backend Engineer, Data Analyst
Cover image for International Debt Statistics - PPG Bilateral Debt
International Debt Statistics - PPG Bilateral Debt
1
14
Cover image for Proud to share that I’ve earned the Oracle Cloud Infrastruct...
Proud to share that I’ve earned the Oracle Cloud Infrastructure (OCI) 2025 Certified Data Science Professional certification (https://tinyurl.com/dsmlaidl) — issued by Oracle. This certification validates my expertise in Machine Learning (ML) | Data Science | Artificial Intelligence (AI) | Cloud Computing, showcasing my ability to design, build, deploy, and manage end-to-end ML solutions using OCI Data Science and Oracle AI Services. 💡 Core Expertise: 🔹 Scalable ML pipelines on OCI Data Science 🔹 AI, MLOps, and Cloud best practices for model optimization 🔹 Leveraging OCI Data Flow, Data Catalog, and AI Services for automation 🔹 Skilled in Python | TensorFlow | Scikit-learn | OCI SDKs for production-grade workflows 💪 Passionate about applying ML | Data Science | AI | Cloud Innovation to drive real business transformation.
2
2
255
Cover image for main_palmer_penguin_EDA_2024-project
main_palmer_penguin_EDA_2024-project
1
16
Cover image for main_palmer_penguin_EDA_2024-project
main_palmer_penguin_EDA_2024-project
1
11
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