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About Us
Services
Team
Projects
Testimonials
Careers
Blog
Contact Us

The Wonder Weeks

Design/Development/Ideas/Technology/

Jaumo

Design/Development/Ideas/Technology/

Ukulele tuner, tabs & chords

Design/Development/Ideas/Technology/

PubNub

Design/Development/Ideas/Technology/

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QSD d.o.o.

hello@qsd.ba

Dr. Ante Starčevića bb, Mostar, Bosnia and Herzegovina

direct +387 36 446 089 (BH)
USA +1 347 352 0153 (NY)
UK +44 20 8123 2880 (LND)

Services

Mobile Native Coding
Cross-platform App Development
Mobile UX Design
Backend/API
QA & App Testing
Project Lead
Customer Support

Projects

The Wonder Weeks

Jaumo

Ukulele tuner, tabs & chords

PubNub

Blog

QSD Internship 2025

6 ways to improve the performance of React Native apps

App Localization with String Catalog

Next.js Rendering Methods: Differences between SSR, SSG, CSR, and ISR

ChatGPT API and Blazor Server: Creating an Exceptional Customer Support Chatbot

React Native Reanimated: Your Ticket to 60FPS Animations

Programs and Partnerships

Rectangle

Rectangle (1)

<img alt="BEST logo" data-src="https://www.qsd.ba/wp-content/uploads/2022/04/BEST-logo.png" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2022/04/BEST-logo.png" alt="BEST logo" />

<img alt="Group 196" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-196.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-196.svg" alt="Group 196" />

<img alt="Group 197" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-197.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-197.svg" alt="Group 197" />

Rectangle (2)

<img alt="Group 199" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-199.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-199.svg" alt="Group 199" />

<img alt="Group 200" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-200-1.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-200-1.svg" alt="Group 200" />

NPS in 2024
63

CSAT in 2024
83.70%

Copyright © 2015-2025 QSD. All Rights Reserved

Privacy Policy | Terms of Use | Cookies Policy

QSD d.o.o.

hello@qsd.ba

Dr. Ante Starcevica bb, Mostar, Bosnia and Herzegovina

direct +387 36 446 089 (BH)
USA +1 347 352 8633 (NY)
UK +44 20 3290 1563 (LND)

Blog

QSD Internship 2025

6 ways to improve the performance of React Native apps

App Localization with String Catalog

Next.js Rendering Methods: Differences between SSR, SSG, CSR, and ISR

ChatGPT API and Blazor Server: Creating an Exceptional Customer Support Chatbot

React Native Reanimated: Your Ticket to 60FPS Animations

Services

Mobile Native Coding
Cross-platform App Development
Mobile UX Design
Backend/API
QA & App Testing
Project Lead
Customer Support

Projects

PubNub
Jaumo
Ukulele Tuner, Tabs & Chords
The Wonder Weeks

Programs and Partnerships

Rectangle

Rectangle (1)

<img alt="BEST logo" data-src="https://www.qsd.ba/wp-content/uploads/2022/04/BEST-logo.png" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2022/04/BEST-logo.png" alt="BEST logo" />

<img alt="Group 196" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-196.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-196.svg" alt="Group 196" />

<img alt="Group 197" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-197.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-197.svg" alt="Group 197" />

Rectangle (2)

<img alt="Group 199" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-199.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-199.svg" alt="Group 199" />

<img alt="Group 200" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-200-1.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-200-1.svg" alt="Group 200" />

<img loading="lazy" width="700" height="700" src="https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva.png" class="attachment-large size-large wp-image-10707" alt="" srcset="https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva.png 700w, https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva-300x300.png 300w, https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva-150x150.png 150w" sizes="(max-width: 700px) 100vw, 700px" />

NPS in 2024
63

<img loading="lazy" width="700" height="700" src="https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva.png" class="attachment-large size-large wp-image-10708" alt="" srcset="https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva.png 700w, https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva-300x300.png 300w, https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva-150x150.png 150w" sizes="(max-width: 700px) 100vw, 700px" />

CSAT in 2024
83.70%

Copyright © 2015-2025 QSD. All Rights Reserved

Privacy Policy | Terms of Use | Cookies Policy

QSD d.o.o.

hello@qsd.ba

Dr. Ante Starcevica bb, Mostar, Bosnia and Herzegovina

direct +387 36 446 089 (BH)
USA +1 347 352 8633 (NY)
UK +44 20 3290 1563 (LND)

Blog

QSD Internship 2025

6 ways to improve the performance of React Native apps

App Localization with String Catalog

Next.js Rendering Methods: Differences between SSR, SSG, CSR, and ISR

ChatGPT API and Blazor Server: Creating an Exceptional Customer Support Chatbot

React Native Reanimated: Your Ticket to 60FPS Animations

Services

Mobile Native Coding
Cross-platform App Development
Mobile UX Design
Backend/API
QA & App Testing
Project Lead
Customer Support

Projects

The Wonder Weeks

Jaumo

Ukulele tuner, tabs & chords

PubNub

Programs and Partnerships

Rectangle

Rectangle (1)

<img alt="BEST logo" data-src="https://www.qsd.ba/wp-content/uploads/2022/04/BEST-logo.png" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2022/04/BEST-logo.png" alt="BEST logo" />

<img alt="Group 196" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-196.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-196.svg" alt="Group 196" />

<img alt="Group 197" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-197.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-197.svg" alt="Group 197" />

Rectangle (2)

<img alt="Group 199" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-199.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-199.svg" alt="Group 199" />

<img alt="Group 200" data-src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-200-1.svg" class="swiper-slide-image lazyload" src="data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==" /><noscript><img class="swiper-slide-image" src="https://www.qsd.ba/wp-content/uploads/2021/12/Group-200-1.svg" alt="Group 200" />

<img loading="lazy" width="700" height="700" src="https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva.png" class="attachment-large size-large wp-image-10707" alt="" srcset="https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva.png 700w, https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva-300x300.png 300w, https://www.qsd.ba/wp-content/uploads/2019/12/NPS_siva-150x150.png 150w" sizes="(max-width: 700px) 100vw, 700px" />

NPS in 2024
63

<img loading="lazy" width="700" height="700" src="https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva.png" class="attachment-large size-large wp-image-10708" alt="" srcset="https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva.png 700w, https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva-300x300.png 300w, https://www.qsd.ba/wp-content/uploads/2019/12/CSAT_siva-150x150.png 150w" sizes="(max-width: 700px) 100vw, 700px" />

CSAT in 2024
83.70%

Copyright © 2015-2025 QSD BH. All Rights Reserved

Privacy Policy | Terms of Use | Cookies Policy