Klaus Breyer - Founder

Q: Where is Klaus based?

Klaus is based in Berlin, Germany .

Q: What languages does Klaus speak?

Klaus speaks the following languages: German (Advanced), English (Advanced) .

Q: How many years of experience does Klaus have?

Klaus has at least 16 years of experience. During this time, Klaus has worked in at least 10 different roles and for 11 different companies . The average length of individual experience is 2 years and 6 months . Note that Klaus may not have shared all experience and actually has more experience.

Q: What is Klaus's latest experience?

Klaus's most recent position is Founder at unixtime.app .

Q: What companies has Klaus worked for in recent years?

In recent years, Klaus has worked for unixtime.app , Fillter , cloudlog , Ray Sono AG , and touch361 .

Q: Which industries is Klaus most experienced in?

Klaus is most experienced in industries like Information Technology (IT) , Advertising , and Healthcare . Klaus also has some experience in Professional Services , Energy , Media, and Entertainment and Publishing .

Q: Which business areas is Klaus most experienced in?

Klaus is most experienced in business areas like Product Development , Information Technology (IT) , and Marketing . Klaus also has some experience in Business Intelligence .

Q: Which industries has Klaus worked in recently?

Klaus has recently worked in industries like Information Technology (IT) , Healthcare , and Professional Services .

Q: Which business areas has Klaus worked in recently?

Klaus has recently worked in business areas like Product Development , Marketing , and Information Technology (IT) .

Recommended expert

Berlin, Germany

Experience

Jan 2022 - Dec 2023

2 years

Founder

unixtime.app

Designed a tool for API developers to facilitate bulk timestamp conversion, born from IIoT microservice work with abundant Unix timestamps.
Streamlined workflows by allowing copy-pasting of entire API requests to view and convert all timestamps in context.
Enabled screenshot captures of conversions for sharing in collaborative spaces like Slack or JIRA.
Evolved from a straightforward HTML file into a full-fledged Mac and Windows application.
Open sourced the project to give back to the developer community.

Jan 2021 - Dec 2023

3 years

Co-founder & CTPO

Fillter

Developed Fillter, a form for social media creator requests that users link in their link tree, Instagram bio, or website.
Implemented a unique questioning technique so requests arrive via email in a structured format.
Jointly founded the tool with equal co-founders Felix and Oğuz, leveraging individual skills to bring the project to market.

Jan 2020 - Dec 2021

2 years

Remote

Solopreneur

cloudlog

Created Cloudlog.dev, a tool for frontend developers to stream console.log output from any remote browser in real time into their own developer console.
Developed to meet the needs of remote work environments.

Jan 2019 - Present

7 years 2 months

Berlin, Germany

Technology Principal (freelance)

Ray Sono AG

Involved in projects from initial conceptual brainstorming to implementation using internal or external resources.
Served as Tech Lead on larger projects, overseeing development teams on-site with the Berlin team or remotely with an international team of developers.

Jan 2019 - Present

7 years 2 months

Startup Advisor

touch361

Act as a technical sparring partner for founders focusing on marketing and business intelligence.
Tackle challenges related to data protection (DSGVO) and the product development process with the technical service provider.

Jan 2019 - Dec 2023

5 years

Tech Lead (freelance)

Hydro Pocket

As the Technical Lead at Hydro Pocket, the first end-customer product of the industrial company GmbH & Co. KGaA, I built the tech team from scratch within this new business unit and introduced the Shape Up method.
Hydro Pocket is a leading provider of solutions for hydropower plants. It offers innovative technologies to prevent outages and optimize the performance of hydropower plants through actionable real-time data.

Jan 2018 - Present

8 years 2 months

Startup Advisor

vitalfunktion GmbH

Spar with the founder weekly on product development and monetization for a medication intolerances app with several thousand MAU financed through fixed advertising cooperations.
Developed and maintain a B2B variant prototype in Material UI aimed at doctors and pharmacists.

Jan 2018 - Dec 2019

2 years

Founder and Chief Prototyping Officer

Fotando GmbH

Identified the need for a mobile browser solution for photo uploading, cropping, and editing to avoid bloated native apps and poor ad conversions.
Designed a customer journey allowing users to hang printed photos on their wall directly after delivery.
Achieved functional technical performance but faced financing challenges due to the timing of the first COVID-19 wave.

Jan 2016 - Dec 2019

4 years

Technical Evangelist & Tech Lead (interim)

Native Studios UG

Built several iterations of a prototype for founders in 2016 and 2017 until securing backers and first customers.
Served as Tech Lead for product development and Technical Evangelist to demonstrate the startup’s technology and capabilities to customers.

Jan 2016 - Dec 2018

3 years

Founder and Chief Technology & Product Officer

BuzzBird GmbH

Embarked on an exciting journey with the goal of making social media influencers programmatically bookable, similar to Google Ads.
Developed sophisticated software that digitalizes the influencer process, acting as an “Influencer Agency on Steroids,” now primarily used internally.
Implemented key features including a billing system, a matching algorithm, and an influencer inventory management module.
Encouraged transparency and data-driven decisions by enabling social media creators to share their statistics.

Jan 2010 - Dec 2015

6 years

Founder and Managing Technical Director

buddybrand GmbH

Started building Facebook apps as a freelancer immediately after university and co-founded the company before completing my bachelor thesis.
Built several hundred Facebook apps, grew the company from cash flow to 30+ employees, and transformed buddybrand into a full-service digital creative agency.

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (16 years), Advertising (9 years), Healthcare (8 years), Professional Services (7 years), Energy (5 years), and Media and Entertainment (3 years).

Information Technology

Advertising

Healthcare

Professional Services

Energy

Media and Entertainment

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Product Development (16 years), Information Technology (16 years), Marketing (16 years), and Business Intelligence (7 years).

Product Development

Information Technology

Marketing

Business Intelligence

Summary

Hello, I’m Klaus Breyer, a technology leader with a strong entrepreneurial spirit and over a decade of experience in building and managing effective teams. From kickstarting my entrepreneurial journey in 2010 with my first startup to taking on the CTO/CTPO roles in numerous ventures, I’ve been instrumental in driving technological innovation and excellence.

I’ve anchored my beliefs in Shape Up, the next wave of agile.

I turn visionary business goals into concrete results, with focused expertise at the intersection of product and tech organization. It’s not merely about coding; it’s about crafting standout products that make a mark and drive business forward.

Startup strategy – turning ideas into impactful ventures.
Selling the tech vision – whether it’s to investors or stakeholders.
Prototyping & crafting the first version of a product from scratch, if need be.
Assembling and nurturing a killer team.
Bringing product & engineering processes up to speed.

From startup monoliths to large microservice environments, I’ve led and launched.

But beyond the tech, I build infrastructures that empower.

Teams that innovate - Projects that matter.

I’ve penned down my thoughts in articles and shared them out loud at conferences. Whether it’s a page or a stage, I’m there. With a voice in the tech community, I am more than just a leader; I am an influencer, continually bridging the gap between technology, product, and business.

» Good software is always used but never finished.«

Languages

German

Advanced

English

Advanced

Profile

Created

November 2023

Last Update

June 2025

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is Klaus based?

Klaus is based in Berlin, Germany.

What languages does Klaus speak?

Klaus speaks the following languages: German (Advanced), English (Advanced).

How many years of experience does Klaus have?

Klaus has at least 16 years of experience. During this time, Klaus has worked in at least 10 different roles and for 11 different companies. The average length of individual experience is 2 years and 6 months. Note that Klaus may not have shared all experience and actually has more experience.

What roles would Klaus be best suited for?

Based on recent experience, Klaus would be well-suited for roles such as: Founder, Co-founder & CTPO, Solopreneur.

What is Klaus's latest experience?

Klaus's most recent position is Founder at unixtime.app.

What companies has Klaus worked for in recent years?

In recent years, Klaus has worked for unixtime.app, Fillter, cloudlog, Ray Sono AG, and touch361.

Which industries is Klaus most experienced in?

Klaus is most experienced in industries like Information Technology (IT), Advertising, and Healthcare. Klaus also has some experience in Professional Services, Energy, Media, and Entertainment and Publishing.

Which business areas is Klaus most experienced in?

Klaus is most experienced in business areas like Product Development, Information Technology (IT), and Marketing. Klaus also has some experience in Business Intelligence.

Which industries has Klaus worked in recently?

Klaus has recently worked in industries like Information Technology (IT), Healthcare, and Professional Services.

Which business areas has Klaus worked in recently?

Klaus has recently worked in business areas like Product Development, Marketing, and Information Technology (IT).

What is the availability of Klaus?

Klaus is immediately available for suitable projects.

What is the rate of Klaus?

Klaus's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.