Jeff
Koistinen

Web Designer

Web Developer

Full Stack Developer

Welcome! I’m Jeff Koistinen, a dedicated Web Developer based in Tucson, Arizona. At 27, I’ve spent the last six years helping businesses and individuals build impactful online presences. As a freelancer, I specialize in crafting custom websites that are not just visually appealing but also optimized for performance and user engagement.

Contact Me

Who is Jeff Koistinen?

My story

If you’re searching for a web developer who combines creativity, technical expertise, and attention to detail, look no further than Jeff Koistinen. My passion lies in creating websites that drive results, whether it’s boosting online sales, improving user experience, or building brand credibility.

I started my web development journey in college, learning the ropes of HTML, CSS, and JavaScript. Over the years, I’ve expanded my skill set to include modern frameworks like React and Vue.js, backend technologies like Node.js and PHP, and a keen focus on SEO to help clients rank higher on search engines.

  • Age: 27
  • Residence: USA
  • Freelance: Available
  • Address: Tucson, Arizona
  • Phone: (520) 555-1234
  • E-mail: jeffreykoistinen@gmail.com

Services

What I Do
Custom Website Design & Development

Transform your ideas into a functional, aesthetically pleasing website.

E-commerce Development

Boost your online sales with a seamless and secure shopping experience.

Responsive & SEO-Optimized Websites

Ensure your site looks great on all devices and ranks high in search engine results.

Website Maintenance & Updates

Keep your site secure, updated, and running smoothly with my support packages.

Experience

Working with
Project
Tucson Craft Brewers Website

One of my early successes was designing and developing a website for a local craft brewing community. By implementing an engaging design and user-friendly navigation, I helped the brewers increase event attendance and brand awareness.

Project
Online Learning Platform for Tutors

I developed a platform connecting tutors and students, integrating features like real-time scheduling, secure payment systems, and user authentication. This project showcased my expertise in backend development and database management.

Project
E-commerce Store for Handmade Jewelry

Collaborating with a Phoenix artisan, I built a stunning e-commerce website that combined style and functionality. My use of Shopify APIs and custom coding resulted in tripling the client’s sales within six months.

Education

Studied at
2011-2012
Art University
New York

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2010-2011
Programming Course
Paris

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2009-2010
Web Design Course
London

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2008-2009
Art Course
London

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Pricing

My Plans
Basic
$ 25 hour
  • Web Development
  • Advetising
  • Game Development
  • Music Writing
  • Photography
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Premium
$ 40 hour
  • Web Development
  • Advetising
  • Game Development
  • Music Writing
  • Photography new
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Ultimate
$ 59 hour
  • Web Development
  • Advetising
  • Game Development
  • Music Writing
  • Photography new
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Why Choose Jeff ?

If you’re wondering why you should work with Jeff Koistinen, here’s what sets me apart:
  • Tailored Solutions

    I understand that every project is unique, so I create custom websites designed to meet your specific goals.

    90%
  • Transparent Communication

    I believe in keeping my clients informed at every stage, ensuring their vision remains central to the project.

    95%
  • SEO Expertise

    My websites are not only beautiful but also optimized to help your business rank higher on search engines.

    88%
  • Post-Launch Support

    With Jeff Koistinen, you’re not just getting a website—you’re getting a partner for ongoing success.

    93%

Reviews

What customers say
Stacy
Stacy
Architect

Excellent all around! What stood out most was Jake's excellent service. He made sure our order was placed in time, even though we were ordering on a holiday.

Hazel
Hazel
Designer

Excellent all around! What stood out most was Jake's excellent service. He made sure our order was placed in time, even though we were ordering on a holiday.

Olivia Riley
Olivia Riley
CEO

Excellent all around! What stood out most was Jake's excellent service. He made sure our order was placed in time, even though we were ordering on a holiday.

Javier Parker
Javier Parker
Developer

Excellent all around! What stood out most was Jake's excellent service. He made sure our order was placed in time, even though we were ordering on a holiday.

Contact Me

Ready to bring your project to life? Let’s discuss how I can help you achieve your goals.

    Full name *

    Email address *

    Message *

    Jeff Koistinen
    Consultant & Mentor
    • Age: 27
    • Residence: USA
    • Freelance: Available
    • Address: Tucson, Arizona
    • Phone: (520) 555-1234
    • E-mail: jeffreykoistinen@gmail.com
    Jeff Koistinen