I'm Andres Perez, a software engineer with 5+ years shipping production .NET, React, Next.js, and TypeScript, plus native iOS and Flutter mobile apps, including one live on Google Play. I build new products, modernize existing applications, and take work from discovery to production, either as part of your engineering team or owning a project end to end.
Whether you're hiring for a team, need additional engineering capacity, or run a business that needs software built around how it operates, there is a straightforward way to work together.
For companies hiring
For companies looking for an engineer who can contribute across the stack, modernize existing systems, and own features from discovery through production.
For teams that need capacity
For companies that need additional engineering capacity, application modernization, integrations, SaaS development, or help taking an existing project across the finish line. I work directly with technical and business stakeholders.
For independent businesses
For businesses that have outgrown spreadsheets, disconnected tools, or manual workflows. You don't need to hire a full-time engineer to get software built around the way you operate.
The kinds of work I take on, for companies and independent businesses alike. Every engagement is scoped, built, tested, and shipped to production.
Replace spreadsheets, manual processes, and disconnected tools with software designed around the actual workflow.
Employee portals, dashboards, workforce tools, workflow systems, administrative applications, and other software used inside a business.
Build and launch SaaS products including authentication, multi-tenant architecture, billing, APIs, cloud infrastructure, and modern web applications.
Modernize legacy ASP.NET, .NET, or other business applications without unnecessarily throwing away systems that still work.
Connect existing software, databases, APIs, and third-party services into a unified workflow.
Use modern AI development tools to accelerate implementation while maintaining human review, testing, security, and production standards.
Engagements are typically fixed-scope builds, ongoing retainers, or embedded engineering alongside your team. Fixed-scope projects start at $500.
See pricingMarketplaces and SaaS on the web, native mobile apps for iOS and Android, and a Flutter app on Google Play. Each one designed, built, and shipped end to end.
Marketplace SaaS · Newest
A simple online marketplace for turning an estate, garage sale, or household clear-out into an organized online catalog. Selling dozens of items one by one through traditional marketplaces is slow and hard to keep organized, so SellEverything lets you photograph items room by room, publish one shareable storefront, and point buyers to it with QR codes.
AI-native SaaS
An AI-native notifications platform. The Basic tier is live today, with Pro and Elite tiers on the way, bringing more power to how teams turn signals into the right message at the right time.
Android · Flutter
A focus timer and stopwatch for Android, built solo in Flutter and published to Google Play. Sessions are anchored to the system clock rather than a ticking counter, so the time left stays correct after the app is backgrounded or closed. No account, no network, nothing stored off the device.
SaaS builder platform
A platform for launching production-ready SaaS products fast, auth, billing, and the full stack scaffolded out of the box so founders can ship their idea instead of rebuilding the same foundation every time.
Faith · Community SaaS
A platform helping men grow in faith, discipline, and brotherhood, daily challenges, accountability, and community built to forge men of character.
Personal finance SaaS
Simple, no-friction personal budgeting that makes tracking spending and hitting savings goals effortless, money management without the spreadsheets.
Mobile · Healthcare
A mobile app for iOS and Android helping hospital patients video-call loved ones through camera-equipped Smart TVs. Featured by CBS News for connecting families in the Mother-Baby Unit at St. Anthony's Hospital.
Native iOS · Productivity
A personal-assistant reminders app that sends timely notifications so you never miss a birthday, appointment, or task. Designed and shipped solo, end to end.
Available for remote, contract, and project work
I'm a full-stack software engineer specializing in .NET and modern TypeScript, currently based in Fort Pierce, Florida and relocating to Dallas, Texas. I've delivered software that connects, informs, and empowers, from mobile tools for hospitals to enterprise portals serving 18,000+ students.
My career began in healthcare, where I logged over 3,500 clinical hours and built more than a decade of industry experience. That foundation shapes how I build software: with empathy, precision, and a focus on the people who actually use it. I'm also a committed mentor, I've led group trainings of up to 30 people, contributed to developer standards, and coach engineering interns.
I've shipped hospital apps on a .NET + Azure backend featured on CBS News, maintained U.S. Navy readiness tools, and most recently built mission-critical platforms at Columbia Southern University, transitioning front-end applications from ASP.NET to React, Next.js, and TypeScript. On my own time I design, build, and run seven products, including SellEverything and NotifAI.
Five-plus years of production .NET and SQL Server, a modern front-end stack in TypeScript, React, and Next.js, and native and cross-platform mobile, deployed on Azure and AWS.
Cross-platform mobile development for Android and iOS from a single Dart codebase, used to build and publish Boost: Time Tracker to Google Play.
Native iOS development in Swift, SwiftUI, and UIKit, behind two shipped iOS apps including a HIPAA-compliant hospital app featured by CBS News.
5+ years of production C# across healthcare, government, insurance, and enterprise education, the language I reach for first.
REST APIs, MVC apps, and Razor pages, the backbone of every enterprise system I've shipped, from Azure-backed mobile APIs to high-traffic portals.
Author complex stored procedures, tune queries, and ship safe schema changes, on SQL Server, Azure SQL, and Postgres.
Modern React 19 / Next.js, including the front-end modernization of a high-traffic Prospect Portal from ASP.NET Core to a Next.js stack.
Strict-typed TypeScript across both the front-end and serverless code I ship, non-negotiable at the scale of systems I work on.
App Service, Azure SQL, and Notification Hubs, the cloud backbone behind the .NET and healthcare apps I've shipped to production.
AWS CDK, Lambda, DynamoDB, Cognito, and API Gateway, comfortable building serverless TypeScript backends end to end.
Semantic HTML, accessible CSS, and clean JavaScript, the foundation under every front-end I build.
Daily Claude Code & GitHub Copilot user. AI accelerates implementation; every output is reviewed, tested, and human-verified before it ships.
Worked on the ground-up replacement of a legacy ASP.NET MVC/WebForms student portal with a modern Next.js 16 / React 19 / ASP.NET Core stack across four role-based experiences (Student, Prospect, Professor, Admin). Delivered 66% of all frontend commits while maintaining strict 1:1 production parity, working with AI assistance and reviewing every change before merge.
Previously
Real-world projects across Mobile, .NET, and Web. Click any project for the full story.
CBS News Chicago
JourneyPX was featured for helping families connect remotely with loved ones in hospital maternity rooms.
Watch the storyHiring an engineer, adding contract capacity, or planning a custom software project? Tell me what you're working on.