Step 01
Warehouse model
Dark stores vs hubs, delivery radii, hours and fleet capacity.
Q-commerce
Quick commerce & time-critical ops
Stock, location and courier in the same second as the UI
Quick commerce needs real-time inventory and carts, dark-store geofencing, and courier dispatch—often React Native in the field with NestJS, Redis, and event queues.
Customers see assortments only from warehouses within minutes of travel — so the stack must combine geolocation, live stock and cart reservations before payment settles. Mobile is often React Native / Expo; order and fleet orchestration in NestJS with Redis and event queues. This is extreme time competition — without observability and idempotent APIs, overselling and angry reviews follow quickly.
RT
Realtime
GPS
Geo / routing
RN
Mobile stack
Realtime
Warehouse, map and cart on one clock
Q-commerce is event synchronisation — refreshing a web page every 30s is not honest here.
Geo as a filter
Users do not see SKUs you cannot deliver on time.
Soft reservation
Short stock holds for decisions — then stock returns to the pool.
Dispatch
Automatic courier assignment with route and capacity constraints.
24/7 ops
Warehouse and support panels — same data as the customer app.
Cooperation process
How does our cooperation look like?
A transparent process that leads from idea to finished product
Step 02
Stock & holds
Short cart-line locks, TTLs, release on timeout.
Step 03
Customer app
Fast mobile UX with clear “out of range” states.
Step 04
Dispatch
Courier assignment, batching, maps and ETA integrations.
Step 05
Peaks & chaos
Load tests, rate limits, graceful degradation under pressure.
Key benefits
Why choose us?
Business outcomes first—technology is the means, not the end in itself.
Realtime
Stock signals to apps in milliseconds.
Geo inventory
Assortment depends on warehouse distance.
Fleet ops
Tools for couriers and dispatchers.
Monitoring
SLA alerts and order queues.
Questions about this system type
- Why does quick commerce need realtime refresh?
- Because two customers can hold the same SKU in the same second—without reservations and geofencing you risk overselling and ops failures.
- Must the driver app be native?
- We often choose React Native / Expo for one codebase on iOS and Android, with background GPS and camera scanning—aligned with store policies.
- How do you scale courier dispatch?
- Through assignment services with route and capacity constraints, event queues and monitoring—ready for promo spikes.
Content last updated: March 18, 2026
Technologies
What technologies do we use?
Modern tools and proven solutions for the best results
React Native
Mobile
Expo
Framework
NestJS
Backend
PostgreSQL
Database
R
Redis
Realtime
W
WebSocket / SSE
Live
Client testimonials
What our clients say?
Case study
Results speak
for themselves.
100 000+
4,9
App StoreApp downloads · 4.9 rating on App Store
SFD app nominated for Mobile Trends Awards 2025 (Commerce). Read more.See the live app
“We talked to many vendors, but after the conversation with Mikołaj from GMI, I felt completely understood and saw my ideas visualized very quickly. That really captivated me, I felt it simply had to succeed. We have a 4.9 rating on the App Store, which I am very proud of. We continue to work with GMI: we have many ideas for further app development.”
Mateusz Pazdan
CEO, SFD S.A.
More partner voices
The same way of working — deliveries for clients across industries.
Below: condensed references from recent years.
Sławomir Rdest
Board Advisor, EMKA S.A. / COO, EMKA Australia at EMKA S.A.
“As long-term clients of GMI Software, we have had the pleasure of working with them for several years. GMI Software stood out during the tender process with their refreshing, positive approach and the professionalism of their CEO and team. The first project was delivered flawlessly, establishing the foundation for a partnership that continues to this day. The GMI Software team members are not only experts in their field but also wonderful people to work with. For any organization seeking a partnership with a reliable and qualified software development company, GMI Software is a fantastic choice.”
5000+
Downloads in 1 month
14
Sprint weeks
Service scope
What does the service include?
Below is an example scope of work that we adjust to the stage and goals of the project.
Cart line reservation with short TTL
Product views filtered by geolocation
React Native apps and ops dashboards
Instant payment integrations
Courier assignment algorithms
Infrastructure for promo spikes and weekends
Ready to start?
Schedule a free consultation and learn how we can help with your project. After our DDT process (Discovery, Design & Technology), we offer a price guarantee and a fixed-price agreement.
Preliminary estimate in 48h
Fixed price after DDT — price guarantee
No commitment
We can sign NDA
Contact
Let's talk
about the project.
Have an app idea or need technological support? Write to us — we'll prepare a preliminary analysis and estimate within 48h. Projects that go through our DDT process (Discovery, Design & Technology) come with a price guarantee and a fixed-price agreement — a key differentiator for us.
gmi.software Sp. z o.o.ul. Jana Heweliusza 11 / 819
80-890 Gdansk, Poland
80-890 Gdansk, Poland
NIP: 5252816287KRS: 0000830003
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