Where Ideas Meet Execution
Startup Case Studies

Art Underscore
Real examples of how Qualifast helps startups build MVPs, launch products, and scale software platforms.
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Platform
Product type
Size
Industry
Android
Web App
Backend
Cloud
Colibra’s on a mission to turn any flight delay into an effortless and quick-paid compensation. By utilizing an European Union directive for flight delays, they make compensation collection easier and faster for their customers. Their apps keep track of boarding passes, flight information and compensation eligibility. We have created their Android app, backend, administrative web interface and their cloud infrastructure.
(2020 - 2022, 2025 - Ongoing)
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Android
iOS
Web App
Backend
Cloud
Reloyalty is a London based startup, that aims to make customer reward systems more fair and frictionless. We have created from the ground up their native mobile applications (Android & iOS) and a web portal. The mobile apps help consumers track their loyalty rewards from businesses they frequent. The web portal servers businesses and enables them to create and manage promotional campaigns and get insights on their customer base. Everything is penetration tested and CREST certified.
(2018 - 2020; 2024 - Ongoing)
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Android
Hopper revolutionizes the way people book flights, hotels & more by predicting prices with 95% accuracy up to 1 year in advance. We've been part of the Android development team and helped them implement their new Hotels product. Additionally we have created a custom automated testing framework and improved the existing mobile application, greatly reducing app instabilities.
(2019 - 2020)
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Web App
Backend
Cloud
OMNIO solves all kinds of compliance challenges in the financial domain. Their combined platform identifies suspicious activity, writes the assessments and proposes a resolution for any cases. We have built all parts of their initial solution - a web/backend application with multiple fintech integrations, that enable the various functionality of the system.
(2021 - Ongoing)
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Web App
Backend
Cloud
Deptax ensures tax compliance that marketplaces and sellers can fine-tune to their specific needs. Designed for seamless integration with other platforms, Deptax empowers businesses to attract more sellers and expand operations while meeting compliance requirements.
(2024 - Ongoing)
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Web App
Backend
Cloud
A platform aimed at bringing mortgage processing to 21st century, utilizing the power of AI. Finbryte’s modular structure allows the platform to cover many processes related to one of the largest revenue streams of financial institutions. Partially funded by an European Seal of Excellence grant.
(2023 - Ongoing)
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Android
iOS
User Tribe is a customer and user experience platform designed to make it easier and more efficient to produce, store, and share great CX insights and customer feedback in real-time. We have build native mobile apps that allow their study participants to share their thoughts of mobile websites and native apps. The apps present the participants with a questionnaire and collects their feedback by recording audio, video and the screen of the device.
(2020 - 2021)
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Web App
iOS
Android
Backend
Cloud
Euno is building the next-generation customer loyalty and rewards management platform for the modern enterprise. The solution is designed as a B2B2C ecosystem, enabling businesses to create, manage and scale loyalty programs across markets. The platform is initially launching in Malta, with KM Malta Airlines as its first corporate client, and has plans for global expansion. We are responsible for the full technical implementation, including architecture, backend, web and mobile applications, and cloud infrastructure. Additionally, we stabilized and automated an undocumented infrastructure after the original team was no longer available.
(2025 - Ongoing)
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Web App
Backend
Cloud
Zimoti is co-founded by three people with successful track in startup world, people with vision and business strategy that is bound to be successful. Zimoti is the first real estate portal in Bulgaria that provides an experience of 21st century system. Something that is adding on the competitive edge here is that it provides free real-estate deal assessment.
(2024 - Ongoing)
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Web App
Backend
Cloud
Sheetly finally makes it easy to manage your ecommerce data. Utilizing the well established spreadsheet interaction and its powers this innovative product simplifies content management for Shopify users, but also has the ambition to act as connector / bridge between different ecommerce platforms. We have built the application from scratch, embedding the innovative data approach conceptualized within Sheetly.
(2022 - 2023)
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Android
iOS
Web App
Backend
Cloud
Flat Manager are a company focused on short, mid, and long term apartment rentals management. We have created for them a system to facilitate their operations: monitor properties condition, track work tasks and setup work processes. It was built as a digital platform, allowing the onboarding of other companies to use it. The system consists of a web app for property and staff management and mobile apps for tasks tracking.
(2020 - 2023)
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Web App
Backend
Cloud
SPHINX Solutions is a credit brokerage company with a wide range of services. They support their clients throughout every stage of financing a project: from the preparation of the budget to the signing of the credit at the notary's office. We have implemented their new platform for credit brokers and people looking for a real estate credit. It allows their clients to receive instant recommendation for credit size and credit institution, that would best fit their needs. They can then start and manage credit applications and connect to professional brokers.
(2019 - 2021)
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iOS
Backend
Cloud
AtKairos is a AI-powered smart calendar app that syncs with your body clock and provides powerful analytics to optimize users' schedule, track their time, and organize meetings. The app has various integrations and complements existing calendars and assistants, helping its users navigate their day quickly and with purpose. We have helped them go to market with the development of the iOS application and the main application backend.
(2022 - 2023)
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iOS
Backend
Cloud
GRVTY is a social network that leverages web3 and blockchain tech to guarantee its users maintain ownership of their data and content. Centered around the sporting community, GRVTY brings athletes, clubs and fans closer together in a safe and fun space. The network is on mobile only and we have developed the iOS application along with the backend of the platform.
(2022 - 2023)
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Web App
Backend
Cloud
Ocenime is a real estate price estimating service, that is based on big data and web scraping. Their goal is to provide private users, banks and brokers with the most correct market valuation for housing and thus limit fraud and speculative prices. We have developed for them several web applications that display the gathered and aggregated data. A web application for private customers, a web portal for banks, and a web portal for curated housing ads.
(2019 - 2023; 2025)
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Android
Web App
Backend
Cloud
Liane allows you to book a certified, safe and reliable assisted accompany service for the movement of the elderly and anybody else who needs an extra care. We have implemented the Android mobile app, web admin panel and backend that powers their business.
(2016 - 2019)
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Android
iOS
Web App
Backend
Cloud
Angels-FX provides analysis of forex and cryptocurrency markets and help their clients build their trade around important support and resistance levels. Our work consisted of creating their backend and cloud infrastructure and mobile applications for Android and iOS.
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Web App
Backend
Cloud
Mindset Design is a mindset self-coaching app that enables high-achievers like sales experts, professional poker and e-sports players, traders, athletes and others, to practice self-awareness and willpower daily. We have implemented their initial web application, which allows their users to self-improve by having individual consultations, goal setting plan, have chat coaching sessions or use one of Mindset Design’s self-reflection tools.
2021
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Web App
Backend
Cloud
Rees is a career coaching company, that helps people achieve their professional goals and feel fulfilled. We have developed their web app where users keep track of daily progress towards their specific goal. There they have access to a 24/7 career coach and lots of resources to help them on their journey.
(2020 - 2022)
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Confidential
by Nature

Some of our most exciting and innovative projects are still under wraps due to confidentiality agreements and the sensitive nature of the work. While we can’t share every detail publicly, we’re proud to showcase a selection of the results and solutions we’ve successfully delivered for our clients.
FinTech
we handled a 40K IP DDoS
attack on a tight budget
When a partner’s platform went down under a massive DDoS attack, our infrastructure team moved fast to restore stability without expensive enterprise tooling. Facing over 205 million requests from 40,000+ unique IPs, we analyzed AWS traffic patterns, investigated ALB logs, and identified attack vectors targeting a specific endpoint.
Working within a tight infrastructure budget, we combined AWS WAF, geo-blocking, SSR traffic whitelisting, and custom log analysis scripts to isolate malicious traffic and maintain service availability. By identifying 159 attacking subnetworks and applying targeted firewall rules, we successfully mitigated the attack while keeping infrastructure costs under control.
This case highlights our expertise in cloud infrastructure engineering, AWS security, DDoS mitigation, scalable backend systems, and cost-efficient DevOps architecture — proving that resilient infrastructure is not only about enterprise budgets, but also about smart engineering and rapid incident response.
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Our stack
of technologies

Art Underscore
We have the expertise to conceptualize, design, develop, test, and deploy comprehensive digital solutions tailored to your unique vision.

Contact Us to bring these ideas to life using a high-performance selection of industry-leading technologies. Our team is ready!
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