Mobile Developer (.NET)

• What You Bring

• Proven track record: Live apps you've shipped that are currently in production, with a portfolio or App Store/Google Play links to prove it.
• Strong senior-level commercial experience—this is not an entry-level role.
• Comfortable working with APIs and collaborating with a backend team (bonus if you know .NET/C#).
• Working knowledge of mobile security fundamentals: authentication, permissions, push notifications, and BLE.
• Independent, clear communicator who delivers.
• Based in Warsaw or willing to relocate, and available to start immediately.

Mobile Developer (.NET) — B2B Contract | Warsaw | Start Immediately

• Full-time
• In-office
• Relocation bonus
• Milestone bonuses

The Opportunity

We're building a mobile app that talks to real-world access control and operational systems—secure logins, biometrics, BLE-based access, payments, and reporting, all in one platform. We need a hands-on mobile developer to own the app and ship features fast, working side-by-side with our .NET backend team and directly with the CEO.

This starts as a B2B contract with real potential to grow into a bigger, long-term role—architecture, team leadership, the works—if it's a fit on both sides.

This is a senior-level role only. We need someone with a proven track record—live, shipped apps in production and a portfolio to show it. No juniors, no mid-level.

What's In It for You

• up to 6,500/month (B2B contract).
• Relocation bonus if you're moving to Warsaw.
• Milestone bonuses for major deliveries (first release, key integrations, platform go-live).
• Modern Warsaw office.
• Direct access to the CEO—your work shapes the product.
• Fast-moving, low-bureaucracy environment with genuine long-term growth opportunities.

Start immediately. Interview process takes days, not weeks.

,[Mobile app features (iOS/Android or cross-platform) — real, production, shipping code., Authentication, biometrics, push notifications, and BLE functionality., API integrations with our .NET/C# backend., Direct input into how the app connects to our customer portal, payments, and reporting systems., Fast decisions, zero bureaucracy—you work directly with the CEO and core team.] Requirements: .NET, API, Security Additionally: Visa Assistance, Relocation Assistance, Milestone Bonuses, Long term.