Mobile App Development
Native Android apps in Java and Kotlin, native iOS apps in Swift, and Compose Multiplatform for truly shared cross-platform codebases — optimized for App Store and Play Store rankings.
Belgian software studio
Your cosmic edge in
modern software
Qosmic is a Belgian software studio building mobile apps, websites, payment integrations, on-site AI agents and backends. Headquartered in Belgium, serving clients worldwide.
- 20+Products shipped
- 4+Countries served
- 99.9%Uptime SLA
- 100%Belgian HQ
Trusted by ambitious teams worldwide
NODALVIEW
POSBEL
WORLDLINE
VIVA
KEYWARE
AXEPTA
What we build
End-to-end engineering, from interface to infrastructure
Five focused practices, one accountable team. Every engagement is delivered by senior Belgian engineers with production-grade tooling and measurable outcomes.
Website Development
High-performance marketing sites, SaaS dashboards and e-commerce storefronts engineered for Core Web Vitals, accessibility and search visibility.
Payment Integrations
End-to-end payment flows — online checkouts, in-store terminals, cash registers and unattended kiosks — integrated, certified and reconciled with your back office.
On-Site AI & Custom Agents
Private deployments of open-source LLMs on your own hardware, VPC or cloud — paired with custom AI agents you can wire into an autonomous team to handle real tasks across your business.
Backend Development
Scalable REST and GraphQL APIs built in Python, Java/Kotlin and PHP Laravel — hardened for reliability, observability and long-term maintainability.
Not sure what you need?
Book a free 30-minute architecture call. We'll map your goals to the right stack — no commitment.
Talk to an engineerWhy Qosmic
Senior craftsmanship, delivered from Belgium
Qosmic is a Belgian software studio pairing senior engineers with production-grade tooling to ship reliable products. Every project includes documentation, tests, observability and a clear handover.
- Senior-only teams. No junior ramp-up, no hidden subcontractors.
- Transparent milestones. Weekly demos and shared roadmaps from day one.
- Belgian-rooted, worldwide reach. HQ in Belgium, delivering remotely across Europe and beyond.
- Production handover. CI/CD, monitoring and runbooks included in every engagement.
Questions
Frequently asked questions
How long does a typical project take?
Most engagements ship a production-ready MVP in 6 to 10 weeks. Larger platforms run as rolling quarterly milestones with weekly demos.
Can you host AI models on our own servers?
Yes. We deploy open-source LLMs (Llama, Mistral, Qwen) on your hardware, private cloud or VPC with full observability and cost controls.
Do you offer ongoing maintenance?
Every build includes a 30-day warranty. After that you can opt into retainers covering monitoring, updates, incident response and new features.
Can you build custom AI agents for our business?
Yes. We design and deploy custom AI agents — on your hardware or in a private cloud — that you can compose into a coordinated team handling support, operations, back-office and internal tooling tasks.
How do you price engagements?
Fixed-scope for MVPs, monthly retainers for long-term builds. You'll always receive a detailed estimate before signing anything.
How do your AI agents connect to our existing systems?
Through your existing APIs, databases, message queues and SaaS tools. Every agent ships with audit logs, role-based access and human-in-the-loop checkpoints so you stay in control of what it can do.
Let's talk
Ready to build
your next product?
Tell us about your idea, timeline and budget. We'll reply within one business day with a clear path forward.
- Websiteqosmic.be
- HQBelgium · Remote worldwide
Message sent!
Thanks — we'll get back to you within one business day.