Bluegeko

Senior Mobile Developer — B2B Contract | Warsaw | Start Immediately

$6,000/month · Full-time · In-office · Relocation Bonus · Milestone Bonuses

The Opportunity

We're building a modern mobile application that connects to real-world access control and operational systems—secure authentication, biometrics, Bluetooth Low Energy (BLE), payments, and reporting.
 

We're looking for a hands-on Senior Mobile Developer to own the mobile application, ship features quickly, and work directly with our CEO alongside an experienced .NET backend team.

This starts as a B2B contract with genuine long-term potential to grow into architecture, technical leadership, and team management as the product expands.

This is a senior-level role only. We require someone with a proven history of shipping production mobile applications. Applicants must be able to demonstrate live apps currently available in the App Store or Google Play. Junior and mid-level candidates will not be considered.

What You'll Build

• Mobile applications (iOS, Android, or cross-platform) built for production
• Work on Authentication, biometrics, push notifications, and BLE functionality
• API integrations with our .NET/C# backend team
• Customer portal, payments, and reporting integrations
• Work directly with the CEO and core engineering team with fast decision-making and minimal bureaucracy

What You Bring

• Proven track record: Live mobile applications currently in production with App Store, Google Play, or portfolio links
• Strong senior-level commercial mobile development experience
• Experience integrating APIs into production mobile applications
• Knowledge of authentication, permissions, push notifications, mobile security, and Bluetooth Low Energy (BLE)
• Ability to work independently and deliver high-quality software
• Based in Warsaw or willing to relocate
• Available to start immediately

Nice to Have (Not must)

• .NET / C# basic experience
• CRM/CMS basic experience (e.g. Umbraco)
• Access control or IoT integration experience
• Bluetooth Low Energy (BLE) hardware basic experience
• Interest in growing into a technical leadership position

What's In It for You

• $6,000/month (B2B Contract)
• Relocation bonus for candidates moving to Warsaw
• Milestone bonuses for major product deliveries
• Modern office in Warsaw
• Direct access to the CEO
• Fast-moving environment with minimal bureaucracy
• Long-term career growth as the engineering team expands

Applications without proof of shipped production apps will not be considered.

Start immediately.

Interview process takes days, not weeks.

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

$5,500—$6,000/month · Full-time · In-office · Relocation bonus · Milestone bonuses · Visa Assistance

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, no exceptions.

What You'll Build

• 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.

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.

Nice to Have

• .NET/C# experience.
• CRM/CMS experience (e.g. Umbraco).
• Access control or IoT/BLE hardware integration experience.
• Interest in leading a mobile team as the product grows.

What's In It for You

• $5,500—$6,000/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.

Please include links to live apps or a portfolio with your application. Applications without proof of shipped work will not be considered.

Start immediately. Interview process takes days, not weeks.