Freelancers using SQL in ElizabethFreelancers using SQL in Elizabeth
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Anastasiya Kotelnikova's avatar
Anastasiya Kotelnikova
New York, USA
Data & Machine Learning Engineer | SQL, Python, AWS, NLP
Data & Machine Learning Engineer | SQL, Python, AWS, NLP
Cover image for Human vs AI Text Classifier
Human vs AI Text Classifier
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Cover image for COVID-19 Case Forecasting with Python
COVID-19 Case Forecasting with Python
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Cover image for House Price Regression with R
House Price Regression with R
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Cover image for Equity Portfolio Optimization with R
Equity Portfolio Optimization with R
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5
SQL(1)
Jovanne Saldierna's avatar
Jovanne Saldierna
New York, USA
Analytics consultant for dashboards, SQL, and insights.
New to Contra
Analytics consultant for dashboards, SQL, and insights.
Cover image for Most small businesses are making
Most small businesses are making decisions off numbers they don't fully trust. Mismatched reports. Spreadsheets that take hours to update. Metrics that mean different things to different people. I spent 4 years fixing exactly this at HCA Healthcare across 186 facilities and at Dell across 100+ enterprise accounts. Reduced manual reporting by 60%. Standardized 30+ KPIs so every team was finally working from the same numbers. Now I bring that same rigor to smaller teams that need real analytics without hiring a full-time analyst. If your data is a mess or your reporting takes longer than it should, that's exactly what I do. Open to dashboard builds, SQL audits, and monthly reporting setups. DMs open. https://public.tableau.com/app/profile/jovanne.saldierna/viz/ShippingCostIntelligenceSystem/ShippingCostIntelligence
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Cover image for Sales Performance Analytics Dashboard
Sales Performance Analytics Dashboard
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4
Cover image for Carrier Cost Optimization & Negotiation Dashboard
Carrier Cost Optimization & Negotiation Dashboard
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4
Cover image for Carrier Optimization Engine, $293K Savings
Carrier Optimization Engine, $293K Savings Model Built a Tableau optimization engine modeling carrier rate scenarios across 28 shipping lanes to identify validated cost-saving opportunities. The analysis found $293,482 in annual savings, an 18.6% cost reduction, and $58.70 potential savings per shipment by comparing current rates, proposed rates, and savings by carrier. The dashboard also surfaced the highest-value optimization lanes, with the South region representing $71K in opportunity and lane-level savings ranging from 18–20% across multiple carriers.
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SQL(7)
Shannon Liao's avatar
Shannon Liao
Inwood, United States
Pultizer-winning journalist in tech, culture and biz.
New to Contra
Pultizer-winning journalist in tech, culture and biz.
Cover image for Digital Board Game Review Project
Digital Board Game Review Project
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4
Cover image for TikTok with over a million impressions
TikTok with over a million impressions
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4
Cover image for Unemployment claims from Asian Americans have spiked 6,900%
Unemployment claims from Asian Americans have spiked 6,900%
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3
Cover image for Development Challenges for Diablo IV
Development Challenges for Diablo IV
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4
SQL(1)
David Everett's avatar
David Everett
Brooklyn, USA
Technical Operational Expert
Technical Operational Expert
Cover image for Webflow CMS from Snowflake
Webflow CMS from Snowflake
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18
Cover image for Zendesk API & App Development
Zendesk API & App Development
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18
Cover image for MyTrainingPlan
MyTrainingPlan
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15
Cover image for Snowflake Alarm Slack Bot
Snowflake Alarm Slack Bot
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2
SQL(1)
Moses NJUGUNA's avatar
Moses NJUGUNA
New York, USA
Avid Software Engineer, Data Engineer and Technical Writer
New to Contra
Avid Software Engineer, Data Engineer and Technical Writer
Cover image for This is a web design project for an Institution.
This is a web design project for an Institution.
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Cover image for Escape Agency – Smart Booking & Content Hub
Escape Agency – Smart Booking & Content Hub
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4
Cover image for Closertune Agency – Full-Stack Digital Solutions
Closertune Agency – Full-Stack Digital Solutions
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4
Cover image for Pinnacle Management Consultants
Pinnacle Management Consultants
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5
SQL(1)
Mboya Jeffers's avatar
Mboya Jeffers
New York, USA
Data engineer who builds full-stack analytics platforms.
New to Contra
Data engineer who builds full-stack analytics platforms.
Cover image for Equity Portfolio Overview
Equity Portfolio Overview
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Cover image for Automated equity portfolio analytics report
Automated equity portfolio analytics report — live performance vs SPY benchmark (Sharpe ratio, Beta, R-squared, annualized return, max drawdown). Macroeconomic environment section pulls directly from FRED: GDP, CPI, unemployment, Fed Funds rate, 10-year yield. All figures source-attributed with pull date. Built with Python — Yahoo Finance + FRED API, fully automated from data pull through PDF generation.
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Cover image for Q2 2026 S&P 500 sector
Q2 2026 S&P 500 sector performance scoreboard — 11 GICS sectors ranked by quarterly return, YTD, 52-week return, annualized volatility, and momentum signal. Technology led Q2 at +45.5%, Utilities lagged at -5.2%. SPY benchmark included for comparison. Momentum classification (Bullish/Neutral/Bearish) based on 20-day vs 50-day MA crossover with price confirmation. Live data pulled from Yahoo Finance. Fully automated — Python handles the data pull, computation, ranking, and PDF generation.
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Cover image for Automated crypto portfolio intelligence report
Automated crypto portfolio intelligence report — 20 digital assets ranked by market cap, weight, and multi-timeframe return (24h, 7d, 30d). Includes executive summary with portfolio-level Sharpe ratio, weighted return, VaR at 95% confidence, and concentration risk flag. Live data pulled from CoinGecko API. Built with Python — fully automated from data pull through PDF generation.
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SQL(1)