Custom web apps and APIs in .NET, Node.js, and Python. Legacy systems moved to modern stacks and AWS. Flutter mobile apps and practical AI, built by one senior engineer.
I'm Michael Russo, a freelance software developer. For 20+ years I've built and run production software, including a logistics platform in live freight operations since 2009. You work directly with the person writing your code.
Built software for W-Interactive · OneFleet Pro · Polycomputing · InCommercial · M&T Bank · AT&T
Fixed-scope projects or ongoing contract work, from first plan to production support.
.NET · Node.js / TypeScript · Python (FastAPI) · React
Business applications, customer portals, SaaS products, and the APIs behind them, on PostgreSQL or SQL Server. Built to be maintained, not just demoed.
Good fit when: you need a product or internal tool built properly the first time.
WCF · WebForms · classic ASP · VB.NET → modern stacks on AWS
Move aging systems to modern .NET, Node, or Python in stages, without a risky rewrite. Containerize or port apps to AWS with Lambda, containers, Cognito, and S3.
Good fit when: the system running the business is old, fragile, or expensive to host.
iOS · Android · one codebase
Field, customer, and kiosk apps wired to your real APIs, authentication, and data, including offline-friendly workflows for people on the move.
Good fit when: your team or customers need an app that talks to the systems you already run.
LLMs · OCR · computer vision · web scraping
Document scanning and OCR, LLM features inside existing products, and scraping pipelines that turn manual data entry into structured data.
Good fit when: people are retyping data from documents, screens, or websites by hand.
Each one is live or a working system. Open any card for the full story and screenshots.
SaaS · AWS + FlutterMulti-tenant salon software: booking, CRM, checkout, staff roles, and a website per salon.
Live product on AWS Lambda and PostgreSQL
Logistics · .NETDriver apps, GPS tracking, and proof-of-delivery scanning tied into each client's dispatch system.
Live since 2009: 99 companies, 9,500+ users
EdTech · Python27-course math and AI curriculum with 548 interactive 2D and 3D widgets and an AI tutor.
Hundreds of lessons with symbolic answer checking
Computer visionFinds countertops in architectural blueprints, reads the scale, and estimates material cost.
Models trained on 10,000+ blueprint images
Automation · .NET 10Turns any web page into structured data with your own LLM, from the app, a REST API, or Claude Code.
Parameterized prompts, API keys, and signed webhooks
AI imaging · Flutter + .NETTurns photos into printable coloring pages: free and offline on the phone, or drawn by AI and checked against the photo.
On-device ML plus AI pages with a likeness check
Telephony · C#Click-to-dial bridge: turns UDP packets from business software into calls on an Asterisk phone system.
Duplicate-click protection and a live, color-coded log
Payments · TypeScriptOne subscription billing API with Stripe and Authorize.net as plug-in providers, plus drop-in React checkout and billing screens.
Same app and webhooks on either processor; ready for more
AI chat and follow-up agent for car dealerships, writing directly into their CRM.
Running in live dealerships
Also built: Task3r (Flutter and AWS serverless task platform), Steward Mobile (Flutter field-service app on ASP.NET Core), and authentication and AI streaming hardening for InCommercial.
Every engagement starts with a written scope and price.
A defined app, API, migration, or feature.
Ongoing development, upkeep, or a senior engineer on call.
Architecture advice, code review, or a modernization plan.
Send the form below. I usually reply within a business day with questions or a time to talk.
You get scope, milestones, and a fixed price or day rate in writing before any work starts.
Working software every week or two, in your repository, with progress you can see.
Deployment, documentation, and handoff, plus ongoing support if you want it.
Short articles on modernization and production AI.
Upgrading critical older platforms in stages without breaking the business around them.
Read →Adding AI to established products and workflows with control.
Read →What changes when AI needs reliability, latency control, and ownership.
Read →Keeping agent systems useful without inference cost dominating the product.
Read →
I'm Michael Russo, a freelance software developer in Buffalo, NY, and Russo Dev is my independent practice. I've written production software since 2000, from ASP and VB.NET through C#, WCF, and ASP.NET to today's .NET, Node.js, Python, Flutter, and AWS.
For more than 15 years I've been the principal engineer on OneFleet Pro, a logistics platform that has stayed in live operations while I modernized it underneath. Alongside client work I build my own products end to end, which keeps my cloud, mobile, and AI skills current and gives me a feel for cost and maintenance, not just features.
You work directly with me, from the first message through delivery and support.
Yes. I work remotely with clients across US time zones, and on-site in Buffalo and Western New York when it helps.
You do. The work lives in your repository from day one, and everything I write for you is yours.
Yes. I can own a project end to end, or join your developers as a senior engineer on a specific system or migration.
No. Legacy .NET, WCF, WebForms, classic ASP, and older SQL Server systems are a big part of my background. I modernize them in stages so the business keeps running.
Yes. I'm happy to sign a mutual NDA before we discuss details.
A fixed price for well-defined projects, a monthly retainer for ongoing work, or hourly for consulting and reviews. You get the price in writing before work starts.
A few lines is enough. I read every message and reply personally.
Russo Dev · Buffalo, NY · Remote, US time zones
