Web Applications and Internal Systems

We build applications that make work easier or faster for people in your company, your customers, or yourself.

The goal doesn't have to be earning — it can be saving

Digitising, accelerating, streamlining processes, or serving a specific part of the customer journey — these can be the purposes of your application. We'll help you turn them into reality. Tailored to your needs.

  1. 01

    We learn about your business

    We understand the situation and context the application needs to address. We find out how the application affects or connects to other touchpoints.

  2. 02

    We define goals and expectations

    Together with you, we define the goals and measurable metrics the application needs to meet. We also set up a communication strategy between us. We have well⁠-⁠developed and established project management processes that keep you in control of the outcome throughout.

  3. 03

    We get to know the users

    For the application to meet its goals, it must serve its users the way they operate in the real world. That's why we strive to understand them thoroughly before we start designing. We choose research methods to gather enough unbiased insights in a reasonable time.

  4. 04

    We prepare and test the design

    Through testing and collaboration between designers and developers in one team, we ensure all designs are feasible without issues.

  5. 05

    Custom development

    We develop and implement all solutions with an emphasis on speed and the selection of modern yet sustainable technologies. And we develop without vendor lock⁠-⁠in.

  6. 06

    Development and maintenance

    Launching is not the end of the work. Next come improvements and optimisations. And if something stops working, we address it promptly.

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We led the digital transformation of SAPELI and designed a unique configurator with billions of door product variants

As part of the B2C and B2B digital ecosystem transformation for SAPELI, we designed one of the most sophisticated door manufacturer configurators in the world. Thanks to 70 hours of user testing, its ease of use is comparable to navigating the Instagram app.

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We reduced EG.D customer line requests by 20% and saved hundreds of thousands in operating costs

When a customer helpline acts as a guide for clients navigating the website, it means unnecessarily high costs per call. It also points to website shortcomings — in the case of EG.D, that was its complex architecture.

  • +48% findability

    By simplifying the EG.D website structure, working consistently with navigation hubs, and optimising landing pages, we increased the success rate of finding target pages by 48%.

  • 7× more visits

    We designed a responsive version of the EG.D website that increased mobile traffic sevenfold in 2020.

  • +7.2% online submissions

    Online form submissions increased by 7.2% compared to postal requests, saving EG.D hundreds of thousands annually.

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By optimising the Artmaster course landing page, we increased revenue by 35% in 2 weeks

We redesigned and tested the course detail page — the key sales section of the Artmaster website. The changes boosted website performance and overall business results by increasing revenue by 35%.

  • +49% interactions

    Visitors launch videos 32% more often and trailers 49% more often, click the purchase button 19% more, and register for courses 49% more frequently.

  • +42% conversions

    Within 2 weeks, we increased the number of Artmaster courses sold by 42% through optimisation.

01 / 03

Modern, fast and sustainable technologies

We don't take technical debt lightly. We keep up with the times and choose technologies that won't age too quickly and for which developers who can work with them are available.

Application Design and Development Leads

Lukáš Lefner

Lukáš Lefner

Head of Backend Development

LinkedIn
Tomáš Bohdálek

Tomáš Bohdálek

Head of Frontend Development

LinkedIn
Robin Janásek

Robin Janásek

Chief Innovation Officer

LinkedIn
Jan Junek

Jan Junek

Lead Designer

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Ondřej Švec

Ondřej Švec

Head of Data

LinkedIn
Martin Beňo

Martin Beňo

COO

LinkedIn

How else we can help

Optimisation? Redesign? Simpler system for partners? Digital transformation?

Let's discuss what you're currently facing

Don't want to wait? Call +420 604 122 182 or email tomas.izak@proofreason.com

Tomáš Izák

Tomáš Izák

CEO

„Proof & Reason don't blindly do what the client wants. They think about the brief, keep an eye on details, and give us thoughtful feedback. They're also strong in development and planning. We always know how the project is progressing. When something goes wrong, they acknowledge their mistake. We treat each other as partners. We're truly developing the e⁠-⁠shop together. It's great and fair.“

Ladislav Carda

Ladislav Carda

E-shop and Logistics Manager, Top-obaly.cz

„Working with Proof & Reason is like getting into a Lamborghini. Yes, they're more expensive than the competition, but their approach and especially the results of their work are absolutely top⁠-⁠class.“

Lukáš Pítra

Lukáš Pítra

Online Marketing Expert

„What I value about Proof & Reason is their approach and openness. They always met deadlines and everything was transparent. They don't keep their know⁠-⁠how to themselves — they transfer it to the client. I was able to expand the team's capabilities, teach many people to learn and grow. I see that as a major plus.“

Tomáš Kučera

Tomáš Kučera

VP Sales & Marketing, Sticky Password
(now Director of Sales, Lingea)

„A quality result can't be achieved overnight. Work on the website design took a long time, but it was worth it. The result speaks for itself.“

Jan Stejskal

Jan Stejskal

CEO, Nazuby.cz

„We wanted to bring a new application to market for installation companies and solar power plant owners, so that anyone could fully harness the potential of renewable energy sources. We knew it wasn't just about the technical perspective, but also the overall design, UX, and marketing strategy. That's why we chose Proof & Reason, which focuses on the overall customer experience and can approach the topic from multiple angles.“

Michal Hrabi

Michal Hrabi

COO, SOLSOL

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