David
Gaitsgory
Freelance full-stack engineer. SaaS platforms, data dashboards, mobile apps, browser extensions, and everything in between.
Full-Stack Development
End-to-end web applications — UI, APIs, databases, auth flows, payments.
Data Visualisation
Custom interactive charts and analytics dashboards.
Mobile Apps
Cross-platform mobile applications with a native feel.
Automation & Tooling
Data pipelines, browser extensions, report automation.
Styleep
Production B2B marketplace connecting freelance beauty professionals with salons — scheduling, contracts, Stripe payments, and gamification.
↗ 02Upward Facing Cat
B2C dance class marketplace with automated Zoom meeting creation, Stripe Connect multi-party payments, and E2E test coverage.
↗ 03Buster.ai
Chrome extension detecting misinformation and deepfakes on Twitter in real time — AI verdicts, confidence scores, and heatmaps injected inline.
↗ 04Health Gorilla
Healthcare data visualisation dashboard for UCSF providers — three custom D3 chart types, longitudinal patient data, and a Florence Nightingale polar chart.
↗ 05[Confidential]
Device telemetry intelligence platform with a composable multi-column filter builder, virtualized data tables, and saved query presets.
↗ 06Town & Country
Revenue management SaaS for hotel pricing — custom D3 time-series charts, competitor rate tracking, calendar and table views, and pricing rules.
↗ 07Wisight
React Native compliance app enabling anonymous workplace violation reporting — multi-step flows, dark mode, and a custom component library.
↗ 08Pioneer Buzz
Automated pipeline on AWS generating pixel-perfect branded multi-page PDF report cards weekly from Excel brand performance data.
↗ 09Public Health Post
Published data investigation for Boston University analysing 33 years of U.S. drinking water violations across 600k+ rows of federal data.
↗ 10Memetic Influence
Interactive visualisation for a UT Austin thesis on IRA propaganda — D3 meme propagation networks, 10 bar charts, and custom SVG graph layouts.
↗ 11ARTiMon
Biosensor runtime monitoring demo for CEA LIST — formal temporal logic specs, a C socket bridge on Raspberry Pi, and real-time Unity biosensor simulation.
↗"David was a pleasure to work with. Project was completed on time with great results."
"David is an extremely talented dev, and an artist when it comes to data visualization. I couldn't have asked for a better partner in bringing my data to life. You're in great hands when it comes to professional communications, well-measured milestones, and easily understood goals. 10/10 and I hope to work with him on more projects."
Let's work together
Have a project in mind?
I take on a limited number of freelance engagements at a time. If you're building something bold, I'd love to hear about it.
Get in touch