Case StudiesBlogAbout Us
Get proposal

20,000 Sign-Ups in Two Weeks: The Success of Rainbow’s Bumerang Loyalty Program

Driving a 316% engagement boost in the travel industry through strategic UX/UI design and travel product development.
Loyalty program web platform—Rainbow Tours' Bumerang program with intuitive UI for customer rewards
  • Client

    Rainbow Tours

  • Location

    🇵🇱 Poland

  • Website

    www.r.pl
  • Cooperation dates

    April-August 2024

  • Project status

    🟢 Complete

  • Scope of work

    Product DevelopmentProduct Design

We worked with Rainbow, one of Poland's leading tour operators, supporting their e-commerce team in bringing their new loyalty program, Bumerang, to life. The program is built on the principle that “good deeds come back like a boomerang” and rewards loyal customers with exclusive benefits. The main challenge: deliver a sleek, user-friendly design aligned with Rainbow's business goals and with users' needs and habits.

Challenge

Rainbow needed a loyalty program that would engage users, reflect the spirit of the brand, and be intuitive enough to keep customers participating long term. The solution had to be visually appealing and functional at once, so customers could quickly understand how to join and start using the benefits.

Solution

Our team crafted a design that balances aesthetics with usability. The interface lets users navigate the Bumerang program with ease. We streamlined the sign-up process and shaped the user interface (UI) to guide users through each step clearly, reducing friction and confusion.

“The Startup House design really hit the mark for us. It’s simple, intuitive, and makes it easy for customers to see the benefits right away. This kind of clarity has really helped us boost engagement in the program.”

Michał Jaworski

E-Commerce Director at Rainbow

The Design

The Design

The design uses Rainbow's bold, energetic visuals, so customers feel at home instantly. We refined the UX for smooth, intuitive interactions, a clear step up from the traditional loyalty cards customers used for years.

Visit Rainbow's site

“What really stood out for us was how well the design balanced our brand identity with a user-friendly experience. It’s not just about looking good; it actually works in terms of driving customer interaction and achieving our goals.”

Maciej Hernik

Project Manager at Rainbow

Results

The final product is a loyalty program that feels true to Rainbow's identity and delivers real value to the company and its customers. Within the first two weeks, 20,000 customers signed up for the Bumerang program, confirming the concept was spot on.

“We’ve already seen a strong response from our customers. The fact that 20,000 people joined in just the first two weeks shows that we really hit the mark with this idea.”

Katarzyna Rutkowska-Suwała

Project Manager at Rainbow

Easy-to-follow copy, a well-designed interface, and a smooth user experience led to:

Increased sign-ups

A noticeable uptick in customer registrations for the loyalty program within the first few weeks of launch.

Higher engagement

With an intuitive interface and clear messaging, users quickly started engaging with the program, redeeming benefits, and coming back for more.

Improved customer loyalty

We're confident the Bumerang program will strengthen Rainbow's connection with its customers even further, contributing to higher retention and repeat business.

“The program is easy to use, and that’s been key to its success. We’re seeing people sign up and come back to use the benefits more often.”

Michał Jaworski

E-Commerce Director at Rainbow

rainbow bumerang  4.png

Our Approach

To make sure the design truly reflected Rainbow's business objectives, we ran several workshops with their team. This collaborative approach kept the program's design aligned with their goals and gave us continuous feedback throughout the project.

To get the design right, we ran two rounds of extensive testing with real users from very different backgrounds. That range of perspectives helped us fine-tune the balance between aesthetics and functionality and craft an interface that is both visually striking and intuitive for everyone, across different needs and habits.

We also brought a UX writer into the project team, so every message lands clearly. The result: a program that looks good and communicates with users in plain, precise language.

“The user testing was a real game-changer. Seeing how people from different backgrounds interacted with the program helped us refine the design and make it as intuitive as possible. It made a huge difference in the final product.”

Michał Jaworski

E-Commerce Director at Rainbow

Conclusion

Projects like this confirm that a holistic view of the product helps our clients reach their business goals. The success of the Bumerang program is the result of true partnership: bold, creative team members, partners, and leaders on both sides.

rainbow bumerang  3 .png

Planning a loyalty program or a new digital product? Talk to an expert.

Other case studies

No-code negotiation web app—NegotiateNow consumer deals platform delivered as MVP in under 5 months

NegotiateNow: A Web App in Less Than 5 Months

NegotiateNow wanted to build a platform that helps consumers get better deals. We ran a Product Discovery Workshop and delivered a no-code web application.

Little Wine mobile app on two smartphones with vineyard landscape background.

Empathizing with Winemakers to Create a Global Wine Community

A B2B platform that digitizes wine education, connects professionals with winemakers, and promotes product transparency.

Mobile CRM tool—Siemens Healthineers Digital Sales Companion app for medical device sales team

Siemens Healthineers’ sales organization: a robust mobile CRM tool

Siemens Healthineers AG, a leader in the medical device industry, partnered with SH in May 2020 to strengthen their Digital Sales Companion department.

Ready to centralize your know-how with AI?

Start a new chapter in knowledge management—where the AI Assistant becomes the central pillar of your digital support experience.

Book a free consultation

Work with a team trusted by top-tier companies.

Rainbow logo
Siemens logo
Toyota logo

We build what comes next.

Company

Industries

Startup Development House sp. z o.o.

Aleje Jerozolimskie 81

Warsaw, 02-001

VAT-ID: PL5213739631

KRS: 0000624654

REGON: 364787848

Contact Us

hello@startup-house.com

Our office: +48 789 011 336

New business: +48 798 874 852

Follow Us

Award
logologologologo

Copyright © 2026 Startup Development House sp. z o.o.

EU ProjectsPrivacy policy