Let's build
Coprime is a software development agency specializing in building custom native apps and full-stack web applications. We develop standalone products as well as custom web applications for clients.
About Coprime
Coprime is a one-man show fueled by coffee and sunshine in Denver, CO. Jared Hanstra has been a full-stack software engineer for over 12 years, mostly specializing in front-end web development, and has worked at Indeed, Accenture Interactive, Fuel Made, UW-Madison, and more. When not coding, you can find me trail running, climbing peaks, or on some other adventure in the mountains.
Philosophy
I believe making full-featured web applications and mobile apps to fit your needs shouldn't need to be complicated and time-consuming. I've spent hundreds of hours identifying ways to reduce complexity and abstract away the common patterns in modern software engineering so that I can build your website or web application faster, better, cleaner, and cheaper than anyone else you'll find.
Work
Each of these projects was architected and built from scratch by Coprime. TeeFox was built with the help of the TeeFox team.
Technology
Throughout 12 years in the profession, I've found a technology stack that works outstandingly well and that I've developed thorough expertise with. TypeScript, React, Next.js, tRPC, React Native, Expo, Tanstack, Tailwind, Radix UI, Vercel, Neon, Shopify, Stripe are a few of my favorite technologies that go into almost every new app I build. I love technologies that are powerful and flexible, yet simple and intuitive. I've been working with these tools for years, and understand their advantages, drawbacks, and gotchas intimately. I'll be able to help you build a robust website or application that balances customization with out-of-the-box features.
On top of these industry-standard technologies, I've built a robust set of components, features, hooks, and functions to tap into when building your app. This box of tools allows me to build much faster, and with fewer bugs, than most custom web agencies.
Services Offered
Web Apps: From marketing websites to e-commerce stores to full-featured SaaS apps. Every web app I build is responsive (mobile/tablet-friendly), fully accessible, and has SEO best practices built in. I take great pride in my craft and in balancing all the factors that go into building a robust, modern website. Quality is paramount. Starting at $15k.
Mobile Apps: Custom native mobile apps for iOS and Android using React Native and Expo. Each app is built to your exact specifications, and I'll be able to help you build a robust, modern mobile app. Starting at $25k.
Vibe-Coding Level-Up: Vibe-coding is a wonderful thing until the complex house of cards the AI creates starts to fall apart. Level up your vibe-coded mess into a well-architected, clean, and maintainable codebase you can build a real foundation on. $200/hour.
General Consulting: Whether you're technical or non-technical, I can help you think through and architect your project, build your MVP, or help get you unstuck. $150/hour.