Freelance Data Engineers in CaliforniaFreelance Data Engineers in California
ProjectsPeople
Christine Straub's avatar
Christine Straub
Irvine, USA
Full-Stack AI/ML Software Engineer
$50k+
Earned
1x
Hired
5.0
Rating
78
Followers
Full-Stack AI/ML Software Engineer
Cover image for EMR | EHRHealthcare Application ( HIPAA Compliant )
EMR | EHRHealthcare Application ( HIPAA Compliant )
1
216
Cover image for Creative intelligence & optimisation platform | Dragonfly AI
Creative intelligence & optimisation platform | Dragonfly AI
0
305
Cover image for RAG with AWS Bedrock and
RAG with AWS Bedrock and React
1
760
Cover image for Software Engineer with AI/ML experience
$71K+ earned
Software Engineer with AI/ML experience
2
4
219
Data Engineer(2)
Ari Harrison's avatar
Ari Harrison
proSan Francisco, USA
AI & ML Engineer
$1k+
Earned
7x
Hired
30
Followers
AI & ML Engineer
Cover image for AiFee A creator donation and product
AiFee A creator donation and product sales platform. Support creators you love with donations and discover unique digital products. Deploy in minutes, no local setup required.
0
145
Cover image for Auto Sales Revenue Forecast Dashboard
Auto Sales Revenue Forecast Dashboard
0
55
Cover image for AI Groceries An AI-powered online grocery
AI Groceries An AI-powered online grocery delivery platform built with Next.js 15, React 19, Supabase, Claude API, and Stripe. Designed around "The Harvest Table" philosophy -- abundant, warm, and grounded in real food provenance.
1
285
Cover image for Biglabs Consulting-grade template for professional services
Biglabs Consulting-grade template for professional services firms. Manage case studies, articles, services, careers, testimonials, and client consultations with AI-powered analytics. Deploy in minutes, no local setup required. Features Thought Leadership — Publish articles and insights with categories, excerpts, and rich content Service Pages — Present your consulting services with detailed descriptions and feature lists Consultation Booking — Public intake form for prospective clients with scheduling preferences Careers Portal — Post open positions with departments, requirements, benefits, and salary ranges AI Analytics — Claude-powered insights and reporting on your consulting data And more.....
0
293
Data Engineer(2)
Charles 's avatar
Charles
proCalifornia, USA
Websites, workflow apps & product launch visuals
7
Followers
Websites, workflow apps & product launch visuals
Cover image for Common Ground — Member Migration Review
Common Ground — Member Migration Review
0
6
Cover image for Where the End Begins
Where the End Begins
0
3
Cover image for One Simple Task. An Entire Machine.
One Simple Task. An Entire Machine.
0
3
Cover image for A camera that unfolds. An
A camera that unfolds. An image that follows. FOLD is an original concept film by Launch in Seven: graphite and copper, dimensional motion, and a photograph that opens into its own miniature world. Built in Blender, with creative direction, 3D materials, lighting, animation and editing developed as one connected piece. This is a fictional product concept, not client work or a manufactured camera. Explore the interactive companion: https://launchinseven-fold.pages.dev Have a product that needs a distinctive launch film or interactive experience? Get in touch here on Contra.
4
6
459
Data Engineer(1)
Yichong Shen's avatar
Yichong Shen
Alhambra, USA
Full-stack engineer building reliable web apps & automation
New to Contra
Full-stack engineer building reliable web apps & automation
Cover image for Built a job-search workflow that
Built a job-search workflow that turns scattered job listings into a structured review pipeline. The system collects job descriptions, removes duplicates and irrelevant roles, evaluates opportunities against configurable preferences, and organizes promising positions for human review. It also supports role-specific resume matching and generates traceable summaries so application decisions remain consistent and explainable. Built with Python, structured data processing, browser automation, and AI-assisted evaluation.
1
48
Cover image for Built a tournament data automation
Built a tournament data automation system for an organizer managing approximately 60 events per month and records for 260+ players. The system imports tournament CSV files from Google Drive, validates and transforms the data, recalculates configurable standings, and publishes searchable leaderboards and event history. I designed and implemented the complete workflow using Google Apps Script, Google Sheets, Drive, JavaScript, and CSV ETL.
0
55
Cover image for Designed and built my developer
Designed and built my developer portfolio to present production engineering experience, deployed products, and tailored resume tracks in one responsive experience. The site highlights full-stack applications, workflow automation, backend systems, and interactive projects, with direct access to live products and role-specific resumes. Built with TypeScript and modern web tooling, then deployed to Cloudflare.
0
45
Cover image for Built GARater, a responsive deck-building
Built GARater, a responsive deck-building and analytics platform for Grand Archive players. I designed and shipped the product end to end—from the card API integration and interactive deck builder to multidimensional scoring, visual analytics, Google OAuth, cloud synchronization, and production deployment. Built with JavaScript, Cloudflare Workers, D1, and REST APIs. The product reached approximately 1,180 unique visitors in its first 30 days. https://garater.com
0
61
Data Engineer(2)
Johnny Ha's avatar
Johnny Ha
Alhambra, USA
Senior Full-Stack Engineer | Web Development | AI Automation
$5k+
Earned
1x
Hired
5.0
Rating
21
Followers
Senior Full-Stack Engineer | Web Development | AI Automation
Cover image for PostgreSQL Database Architecture & Performance Tuning
PostgreSQL Database Architecture & Performance Tuning
2
138
Cover image for Evoke - Project completed successfully
Evoke - Project completed successfully and got ⭐⭐⭐⭐⭐ review🚀 Overview EVOKE is a mindfulness-focused digital experience designed to create a calm, distraction-free space for reflection and presence. Problem Most digital platforms are built for speed and engagement, which can feel overwhelming. The goal was to design a space that encourages stillness instead of stimulation. Approach I focused on creating a minimal and immersive interface using soft visuals, intentional spacing, and slow interactions to guide users into a reflective state. Solution Designed a clean, distraction-free UI Built immersive entry and reflection flows Used calming imagery and typography to shape the experience Developed smooth transitions to support a sense of presence Tech & Tools Web development, frontend engineering, UX/UI design Outcome The final product delivers a unique digital experience that prioritizes calmness and intentional interaction, standing out from traditional high-stimulation platforms. 👉 https://www.evoke-space.com/
1
2
191
Cover image for EVOKE - Mindfulness & Reflection Web Experience
$6K+ earned
EVOKE - Mindfulness & Reflection Web Experience
4
21
Cover image for Building Websites & CMS Solutions I’m
Building Websites & CMS Solutions I’m currently working on modern websites and CMS-based projects using no-code and low-code platforms. I build and customize projects with: • Wix & Wix Studio (https://www.wix.com/)• WordPress (https://wordpress.com/)• Webflow (https://webflow.com/)• Bubble.io (http://Bubble.io) I help businesses and startups create fast, responsive, and scalable websites, from landing pages to full CMS and web apps. Open to new projects and collaborations.
4
6
313
Data Engineer(1)
Adam Ornelas's avatar
Adam Ornelas
Moreno Valley, USA
Technical Project/Product manager
$10k+
Earned
1x
Hired
2
Followers
Technical Project/Product manager
Cover image for GP-UCP Algorithm Analysis
GP-UCP Algorithm Analysis
0
79
Cover image for Outlier Detection research
Outlier Detection research
0
71
Cover image for My own project management dashboard
My own project management dashboard connected to slack and jira
0
91
Cover image for Trailer platform
Trailer platform
0
82
Data Engineer(2)
Drake Ballew's avatar
Drake Ballew
San Jose, USA
Curious about how it all fits together in a connected world
LOVABLE_EXPERT

Expert

Curious about how it all fits together in a connected world
Cover image for OpenRecipe is a platform for Creators and Creatives to share...
OpenRecipe is a platform for Creators and Creatives to share, learn, and create in the kitchen.
0
41
Cover image for Know someone who needs a
Know someone who needs a haircut? 🙋 Send them to TrimsByTracy.com (http://TrimsByTracy.com?ref=drake), where they will find the salon of Tracy Turnblad (https://hairspray.fandom.com/wiki/Tracy_Turnblad), a solo hairstylist in Baltimore who needed an expert to tame her booking flow the way she tames manes. I had a lot of fun working on this Proof of Concept, from ideating design system inspiration to working through the nooks and crannies of a hairstylist's booking flow, to figuring out how to succinctly communicate the value added in an overview video. I also continue to learn each time I build something new with Lovable. This time I was focused on reducing the amount of time spent testing, which is what my "Process" video is about. I hope you'll take a look at that since I personally think what I shared there is very valuable and should be standard to all builders' workflow and possibly considered for productization by Lovable. Regardless, I hope you enjoy taking a look around TrimsByTracy! All built with care in Lovable. - Drake https://trimsbytracy.com/ (https://trimsbytracy.com/?ref=drake)https://trims-by-tracy.lovable.app (https://trims-by-tracy.lovable.app?ref=drake)
2
1
89
Cover image for Deficit is a platform for weight-loss coaching and community
Deficit is a platform for weight-loss coaching and community
0
40
Cover image for Fairweather is a roadtrip planning app built around the fore...
Fairweather is a roadtrip planning app built around the forecast
0
26
Data Engineer(1)