Memoji peeking from behind laptop
Available for new projects.

Industry Leading

🌐Web 📱Mobile & 🖥️Software

Development

My name is Karsen Hansen.
My passion is building elegant & scalable software for web, mobile, and desktops with a focus on amazing user experiences.

Real-World Results

Featured Projects

See how I transformed concepts into engaging digital experiences.

YC Directory2024

NextJS 15 | Idea Pitching App


  • Full-stack NextJS | NextAuth | Sanity
  • Sentry error monitoring
  • Parallel & Sequential Requests
  • Sanity CDN
NextJS 15 | Idea Pitching App
SpotLease2024

React Native | Space Leasing App


  • Full-stack React-Native | Node | AWS
  • Stripe Connect payment services
  • In-app instant messaging
  • ElasticSearch indexing
  • AWS database
React Native | Space Leasing App
Intellicheck2022-2023

React | Web Identity Validation


  • Full-stack React | Node | AWS
  • Integrated with mobile hardware (cameras)
  • Automatic ID image capture + cropping
  • Facial liveness & comparison
  • Conditional Company Branding
  • Omni-platform compatibility
React | Web Identity Validation
DragonPy Bot2021

Python | Video Game Bot + Desktop GUI


  • Python Desktop App
  • Full-stack web React | Node | Stripe | AWS
  • Automated 100+ complex game processes
  • OCR (optical character recognition)
  • Tesseract image comparisons
  • Full GUI (graphical user interface)
  • Robust desktop licensing system
  • Software authentication & encryption
Python | Video Game Bot + Desktop GUI
Performant
Accessible
Secure
Interactive
Scalable
User Friendly
Responsive
Maintainable
Search Optimized
Usable
Reliable
Performant
Accessible
Secure
Interactive
Scalable
User Friendly
Responsive
Maintainable
Search Optimized
Usable
Reliable

Happy Clients & Colleagues

What Folks Say About Me

Don't just take my word for it. See what my clients and colleagues say about my work.

Kevin Westfall
Kevin Westfall
Founder & Board Member @ Vroom

Karsen was instrumental to our success in the early days of Vroom (previously AutoAmerica). We relied heavily on our web presence which Karsen delivered in a timely manner while exceeding our expectations.

Meryam Alaoui
Meryam Alaoui
Former Vice President @ American Express

Karsen is one of the best communicators I've had the pleasure of working with, let alone his ability to create stunning web applications. I always look forward to our next project together.

H. Martin Westfall
H. Martin Westfall
Senior Managing Partner @ Coopers & Lybrand

Karsen has a great eye for detail along with an uncanny ability to bring ideas to life in a meaningful way.

Donald B. Lee
Donald B. Lee
System Engineer @ Boeing

Karsen works very well with others; from communicating to delegating, his process always results in something amazing and reliable.

Kevin Westfall
Kevin Westfall
Founder & Board Member @ Vroom

Karsen was instrumental to our success in the early days of Vroom (previously AutoAmerica). We relied heavily on our web presence which Karsen delivered in a timely manner while exceeding our expectations.

Meryam Alaoui
Meryam Alaoui
Former Vice President @ American Express

Karsen is one of the best communicators I've had the pleasure of working with, let alone his ability to create stunning web applications. I always look forward to our next project together.

H. Martin Westfall
H. Martin Westfall
Senior Managing Partner @ Coopers & Lybrand

Karsen has a great eye for detail along with an uncanny ability to bring ideas to life in a meaningful way.

Donald B. Lee
Donald B. Lee
System Engineer @ Boeing

Karsen works very well with others; from communicating to delegating, his process always results in something amazing and reliable.

About Me

A Glimpse Into My World

Learn more about who I am, what I do, and what inspires me.

My Reads

Explore the literature currently shaping my perspectives.

Book cover

My Toolbox

Explore the technologies and tools I used to craft exception digital experiences.

Python
JavaScript
HTML5
CSS3
React
NextJs
AWS
MongoDB
Tailwind
Elastic
Chrome
GitHub
CloudFlare
Python
JavaScript
HTML5
CSS3
React
NextJs
AWS
MongoDB
Tailwind
Elastic
Chrome
GitHub
CloudFlare
Python
JavaScript
HTML5
CSS3
React
NextJs
AWS
MongoDB
Tailwind
Elastic
Chrome
GitHub
CloudFlare
Python
JavaScript
HTML5
CSS3
React
NextJs
AWS
MongoDB
Tailwind
Elastic
Chrome
GitHub
CloudFlare

Beyond The Code

Explore my interest and hobbies beyond the digital realm.

Drawing✏️
Hiking🥾
Gaming🎮
Photography📸
Music🎧
Road Trips🚙
Audio Books📚
map
smiling emoji

Let's create something amazing together!

Ready to bring your next project to life? Let's connect and discuss how I can help you achieve your goals.