Yellows sp. z o.o.

Yellows is a Polish software house founded in Wrocław that builds custom web applications, mobile apps, and backend systems. The team describes itself as taking an individual approach to each project, guided by the principle that good products are created by people with passion for people with vision. While the source doesn't specify exact team size, the portfolio spans healthcare, fintech, tourism, logistics, and HR—suggesting a mid-sized operation capable of sustained project delivery.

The company has worked with clients like Centrum Terapii Dialog (a mental health clinic network) for seven years, building a platform that now serves 110,000 patients and processes 15,000 online appointments monthly. This project demonstrates their ability to handle both complexity and scale: the platform integrates three separate portals (patient, specialist, billing), real-time appointment management, online payments (540,000+ processed since launch), and medical documentation workflows. Another notable project is Zbudujplan.pl, an InsurTech configurator for life insurance that combines real-time pricing, product logic, and dynamic tariff calculations—built for Discoveria to automate advisor workflows and generate qualified leads instantly.

Services and capabilities

Yellows offers four main service lines. Web applications are described as streamlining business operations and automating processes; examples include healthcare platforms, fintech configurators, and administrative systems that "increase efficiency and reduce costs." Mobile applications leverage the statistic that 80% of internet users own smartphones—the company has shipped apps ranging from castle tour guides (Zamek Krzyżtopór, which uses Bluetooth beacons to trigger 3D reconstructions and 360° panoramas) to sports challenge apps and medical diagnostic capsules.

UI/UX design is offered as a standalone service, with the company emphasizing that interface design determines user perception and adoption. The Zamek Krzyżtopór project, for instance, used Figma-based design to navigate a user through 1.3 hectares of castle ruins via location-based services—a complex UX problem solved with interactive beacon-triggered content instead of traditional audio guides.

IT outsourcing and staff augmentation rounds out the offering. The company positions this as an alternative to full-time hiring, promising access to multiple specializations without long-term employment contracts. The source also hints at discovery and tech lead services, with blog posts titled "Discovery Before Development" and "Why a Tech Lead Saves Budget and Time" suggesting upfront consulting before builds.

Technologically, Yellows works across a mainstream stack: PHP and Symfony on the backend (used for the Dialog platform), C# and .NET Core for more enterprise-grade systems (Zbudujplan), JavaScript and Vue.js for frontends, MySQL and MariaDB for databases, Redis for caching, Docker for containerization, and Azure Cloud for infrastructure. Mobile work spans native Kotlin (Android) and Swift (iOS). They use Figma for design and GitHub (implied) for version control. The Zamek Krzyżtopór project required native mobile development plus Bluetooth beacon integration—a more specialized technical demand they handled in-house.

Notable work

Centrum Terapii Dialog's platform is the clearest showcase. Yellows built it starting in 2019 and has maintained it for seven years. The Portal Pacjenta (patient portal) lets patients book and pay for therapy sessions, manage appointment history, order prescriptions, upload documents, and digitally sign consent forms—24/7 self-service. The Portal Specjalisty supports therapists with online consultations, schedule management, contract processing, and invoice generation. The Portal Rozliczeniowy automates payroll for hundreds of specialists with flexible billing rules and corrections. The platform achieved a 4.8/5 rating from 18,940 patient reviews, with 110,000 total users and 15,000 monthly appointments.

Zbudujplan.pl (built for Discoveria) combines fintech and insurance technology: a configurator that guides users through three protection pillars, calculates premiums in real-time based on age and coverage, generates personalized insurance reports with product recommendations, and passes high-quality leads instantly to agents. The architecture uses MySQL, Vue.js on front, C# and .NET Core on back, Docker, and Azure Cloud.

Zamek Krzyżtopór is a location-based services project for a historical castle with 1.3 hectares of ruins. The app uses Bluetooth beacons (600+ meters of castle walls) to trigger automatic location detection, overlay 3D reconstructions of the 17th-century interiors, display 360° panoramas, and guide visitors through a labyrinth of ruins without GPS (which doesn't work underground). It achieved 8,000+ downloads and a 4.1/5 rating. The tech stack was PHP backend, Kotlin (Android), Swift (iOS), MariaDB, and Figma.

Other completed projects include a mental health digital platform, a mobile app for castle tours, an insurance calculator, a sports/habits challenge app, a balance-disorder diagnostic capsule, an HR motivation system for manufacturing, a supply-chain warehouse management module, a charity fundraising portal (Salvatti), and an onboarding/e-learning system for a pharmaceutical company.

How they work

Yellows uses Agile methodology and emphasizes regular evaluation of user needs and close collaboration. For the Dialog project, their client (active in the platform for seven years) stated: "I feel their huge commitment and responsibility for the project—as if they were building it for themselves. It's a team you just work well with: competent, engaged, open, and with a truly partnership approach." The company's blog focuses on discovery phases, tech leads, and building trust—suggesting they front-load projects with technical scoping and stakeholder alignment rather than jumping into code. Engagement appears flexible, ranging from fixed projects (like the castle app) to long-term partnerships (Dialog). Pricing is not specified in the source material.