We are Johnny Bytes

Digital agency

for web development,

App development and IT consulting

About us

Digital Agency from Cologne

We are a digital agency from Cologne and develop outstanding digital products for you and your users. We offer you website development, app development and IT consulting all from one source.

Our team of experienced software developers, product and project managers has extensive experience working with companies in e-commerce, telecommunications, banking, retail, aviation, enterprise management and advertising/marketing, among others - both nationally and internationally.

Our goal is to bring your IT project to success together with you. We support you in the conception, development, testing and rollout of your IT project - and beyond.


Why Johnny Bytes?

Our services as a digital agency

To make your website, app or other IT solution a success, you need the right digital agency to help you realize your vision.

That's why you should work with us:

  • Customer-focused and enthusiastic collaboration

  • Honest consulting

  • Vendor and technology independence

  • Project management that is optimized to your needs, economically feasible and in time

  • Procedures that we adapt to your company and your decision-making processes

  • Personal support throughout the entire project life cycle

  • Entrepreneurial thinking as well as practical and human-oriented execution at the highest level

IT Consulting

  • IT Strategy & Concept

    We increase the value of your IT through sustainable IT strategies and concepts.

  • Digital transformation

    We support you in digitizing your processes and your company.

  • IT Architecture

    We design and develop flexible & scalable software and cloud architectures for you.

Software Development

  • Web development

    We implement your web applications with modern technologies like React, VueJS, Angular and many more. ▶ More

  • App Development

    We realize your native and cross-platform apps for Android & iOS. ▶ More

  • Backend Development

    We develop robust and scalable backends and APIs for you with C#/.NET Core, PHP/Laravel, Python etc. ▶ More

Data Science & Analytics

  • Business Intelligence

    We design, project manage and develop your data warehouse and relevant dashboards.

  • Machine Learning

    We evaluate the feasibility and implementation of your machine learning adaptation.

  • Data Science & Analytics

    We analyze the potential of your data and develop strategies to create value.


With Readfy, up to half a million users regularly read over 130,000 ebooks for free. Johnny Bytes took over the apps for iOS and Android from our previous nearshore partner and in a very short time not only updated them together with the backend, but also helped to increase in-app sales by 500%.

Philipp Ortmaier
Philipp Ortmaier
CEO, readfy GmbH

First Avenue

Johnny Bytes has taken over the development and support of our guest info system TIPPTHEK and migrated it to a modern and sustainable architecture in a very short time. Thus, we can install TIPPTHEK in thousands of South Tyrolean accommodations and inform up to 35,000 tourists daily with individual info about their accommodation and the surrounding area.

Michael Hölzl
Michael Hölzl
CEO, First Avenue GmbH


An agile team that cares about customer satisfaction as much as quality. Johnny Bytes understands effective communication and requirements, asks the right questions, has a sense of humor, and keeps to schedule ideally. A strong partner that we recommend without hesitation. I appreciate your support!

Tasso Mitsarakis
Tasso Mitsarakis
Product Owner, stazzle

Digital prototypes for FH Aachen

Together with Johnny Bytes, FH Aachen regularly carries out practice-oriented research projects as part of the Digital Lab. Most recently, prototypes for Alexa Skills and AI-supported tourism solutions were created within this context. These projects are always an enrichment for our students, the university and the business.

Prof. Dr. Mathias Eggert
Prof. Dr. Mathias Eggert
FH Aachen

Our Team

Hi, we are Johnny Bytes!

We want to share our enthusiasm for digital projects with you. The partnership and solution-oriented collaboration with you is our focus, because we believe that teamwork is the foundation for optimal results in the implementation of your digital product. We look at your project with an entrepreneurial eye and always provide valuable input "outside the box".

Get to know the team behind our digital agency here.


Become part of our team!

With us, you develop software for products that our users, customers and we love. You work in an agile team on technically demanding solutions and accompany them from conception to implementation to go-live and beyond.

Current Job Offers:

Mobile App Developer (m/f/d)

(Working Student) Mobile App Developer (m/f/d)

All jobs and more information can be found here.


Contact us!

Free initial consultation

You have any questions or would like to arrange a initial free consultation with us? Then leave us a message via the contact form and we will get back to you as soon as possible.

Alternatively, you are welcome to call 0221-29497500 and discuss your concerns directly with us. We are looking forward hearing from you!