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Offer summary
(Summary generated by AI based on the full job description)
The project is a B2B mobile app integrating authentication, biometrics, BLE, payments, and reporting. Key technologies include iOS/Android or cross-platform with backend .NET/C# collaboration. Responsibilities cover shipping production code, API integration, security features, and swift delivery. Compensation is $6,000–6,500 per month with milestone and relocation bonuses for moving to Warsaw.
from: 26 June 2026
to: 26 July 2026
22 500 - 24 000 złnet (+ VAT)/ mth.B2B contract (full-time)
Salary details
- Relocation bonus if you're moving to Warsaw.
- Milestone bonuses for major deliveries (first release, key integrations, platform go-live).
basic salary
fixed bonus (e.g., quarterly, annual)
performance bonus
discretionary bonus
Offer parameters
level:senior • expert
working mode:full office
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
mobile developement
mobile
Optional technologies
.NET
Our requirements
- 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.
Optional
- NET/C# basic 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.
Your responsibilities
- 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 team.
- 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.
About the project
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.
This is how we organize our work
This is how we work
in houseyou focus on a single project at a timeyou have influence on the choice of tools and technologiesyou have influence on the technological solutions appliedyou have influence on the product
Team members
2+ people:backend developerIT administrator
Applications without proof of shipped work will not be considered.
Start immediately. Interview process takes days, not weeks.
What we offer
- $6,000–6,500/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.
Senior Mobile Developer
22.5k–24k zł / mth. (B2B)
I apply to:
BlueGecko
Warszawa, Masovian
Need more information?
- Make sure the body of the offer doesn’t already include what you’re looking for.
- Ask a question if you need more information you’re interested in.
- We’ll forward your question to the employer and aim to provide a response within 3 business days.