Web Applications
Full-stack apps with a modern React frontend and a solid Python or Node backend — dashboards, portals, and tools your team actually uses.
- React & Vue frontends
- Python / Node APIs
- SQL data modeling
Stone Rabbit Technologies LLC
Custom software,
Custom software,
engineered with AI.
I build apps, websites, and native programs for people and businesses — pairing real software engineering with AI to ship faster, cleaner, and smarter.
0%Workflow automated for clients
0Hours/day saved on key tasks
0+Languages & frameworks
A one-person studio run by Mason Lapine — a software engineer based in Stamford, Connecticut, building production software for clients while leveraging AI and automation at every step.
What I build
Software, tailored to the problem.
From a quick marketing site to a backend that runs your business, Stone Rabbit delivers real, maintainable software — not throwaway prototypes.
Websites
Fast, responsive, professional websites that represent your brand and convert visitors — designed, built, and deployed end to end.
- Responsive & accessible
- SEO-ready & fast
- Easy to maintain
Native Programs
Desktop and mobile applications — Swift for Apple platforms, cross-platform builds, and native tooling that runs close to the metal.
- Swift & Flutter
- Desktop & CLI tools
- Linux & macOS systems
AI & Automation
Prompt engineering, AI integrations, and backend automations that cut manual work — the same approach I've used to automate 60% of a client's workflow.
- AI prompt engineering
- Backend automations
- Measurable ROI
How I work
AI-accelerated, engineering-led.
AI writes a lot of code these days — the difference is knowing what good looks like. Every line is reviewed, tested, and integrated by an actual engineer.
01
Understand
We start with your problem, not a tech stack. I translate what you need into a clear, scoped plan.
02
Build with AI
I leverage AI to move fast — scaffolding, drafting, and iterating — while I steer architecture and quality.
03
Test & integrate
Secure, tested code integrated into your toolset. Built to be maintained, not just to demo.
04
Deliver & support
Deployed, documented, and handed off — with support to keep it running and growing.
Experience
Where these skills were forged.
Years of shipping real software across security, education, and enterprise.
Dec 2025 – Jun 2027 · New Haven, CT
Digital Education Technical Systems Manager
Yale University · Poorvu Center for Teaching and LearningDelivering digital education across Salesforce, Coursera, and online.yale.edu. Redesigned a Poorvu Center website in-house (saving ~$20,000), cut roughly 4 weeks of consulting time on Coursera course redesigns with custom-built tools, and built a compliance-check tool that automates the process and saves ~$20,000 annually.
May 2024 – Jun 2025 · Nashville, TN
Software Engineer I
360 PrivacyBuilt and managed automations and backend core services in Python 3, AWS, and Docker, and modified frontend applications in React and JavaScript. Leveraged AI and prompt engineering to develop faster and more precisely — increasing automations by 60% (saving ~3.5 FTE hours/day) and cutting the highest-value task's effort by 60%.
May 2023 – Aug 2023 · Nashville, TN
Full Stack Web Development Intern
360 PrivacyDeveloped a web application to manage client profile data — a React frontend and Python backend — learning to develop, test, and integrate secure code into a production toolset.
Jan 2022 – Sep 2022 · Henrietta, NY
Web Developer
Enterprise Web Applications · Rochester Institute of TechnologyManaged and developed RIT web applications on both frontend and backend — adding features and fixing bugs on sites like eServices and TigerCenter.
Jun 2021 – Aug 2021 · Stamford, CT
Software Developer
ADM GroupBuilt a web portal to track company technical data — a PHP/jQuery/MySQL frontend backed by a Windows PowerShell script querying Active Directory.
Graduated May 2024
B.S. in Web & Mobile Computing · Minor in Entrepreneurship
Rochester Institute of Technology · GPA 3.46Specialized in web application development and database modeling. Served as a TA for the intro to databases course, tutoring and grading students through MySQL.
Certification
Generative AI with Large Language Models
CourseraHands-on training in generative AI and large language models — fine-tuning and practical, production-focused applications. Verify credential ↗
Selected projects
A few things I've built.
Open-source work and personal builds — more on GitHub.
Python↗
promptOS
An AI-powered Linux distro — talk to your computer in plain language instead of code.
C++↗
OpenAssistant
An OpenAI-powered pocket assistant with firmware that runs on the M5Stack Cardputer.
Lua · Pico-8↗
BB JUMP
A retro-style platformer built in Lua for the Pico-8, published and playable on the Pico-8 forums.
Lua · Pico-8↗
ERS Game
A remake of the classic card game Egyptian Rat Screw, built in Lua for the Pico-8.
Python↗
secretary-task-manager
An intelligent task manager that keeps work organized and moving.
Python↗
rabbit-budget
A personal budgeting tool for tracking and planning finances.
Let's build it
Have something you want built?
Whether it's a website, an app, a native program, or an automation that saves you hours a day — tell me what you're trying to do and I'll tell you how I'd build it.