Senior Fullstack Developer
⚲ Warszawa, Poznań, Wrocław
18 000 - 21 000 PLN netto (B2B)
Wymagania
- .Net
- React
- React Native
- C#
- Microsoft Azure
- Docker
- Microservices
- Entity Framework
- DDD
- ASP.NET Web API
Opis stanowiska
Build a modern web and mobile product for the fitness industry from scratch - from architecture and code to deployment in the App Store and Google Play.
At Qodeca, we create modern digital products for clients worldwide. We are looking for a Senior Fullstack Developer who is fluent in both .NET backend development and frontend/mobile applications based on React and React Native.
You will join an interdisciplinary team delivering a comprehensive product for a fitness industry client. You will have a real impact on technical solutions, code quality, and how thousands of users utilize the club's services on a daily basis.
The Project You Will Work On
We will design, build, test, and deploy a digital ecosystem for a fitness company, including:
• iOS and Android mobile application
• Web panel for employees
• Backend and integrations
• Complete deployment
What You Will Do
•
Develop the product end-to-end: Design, build, and maintain backend, web, and mobile solutions.
• Build the backend in .NET: Develop services and REST APIs using C#, .NET 10+, ASP.NET Web API, and Entity Framework Core, working with SQL Server.
• Create frontend and mobile apps: Implement features in React, React Native, and TypeScript, ensuring a consistent user experience across web, iOS, and Android.
• Design cloud solutions: Work with microservices architecture, Azure, and Docker containerization.
• Develop integrations: Connect the system with ABC Fitness, Stripe, and communication/notification services.
• Ensure quality: Apply Clean Code, SOLID principles, and design patterns, while writing unit and integration tests.
• Co-shape the architecture: Participate in design discussions, code reviews, and technical decision-making.
• Leverage AI in daily work: Utilize tools like Claude Code, GitHub Copilot, ChatGPT, or the OpenAI API to boost productivity without sacrificing quality.
• Support deployments: Collaborate on infrastructure configuration, documentation, testing, and mobile app publishing.
What We Expect From You
•
Experience: Minimum 5 years of commercial software development experience.
•
Backend: Very strong knowledge of C#, .NET Core / .NET 8+, ASP.NET Web API, Entity Framework Core, and SQL Server.
• Frontend & Mobile: Hands-on experience with React, React Native, TypeScript, JavaScript, HTML5, and CSS3.
• Architecture: Practical experience with microservices and cloud-native solutions.
• Microsoft Azure: Experience with services such as App Services, Service Bus, Azure SQL, and Azure DevOps.
• Containerization: Good knowledge of Docker and container workflows.
• Quality & Best Practices: Solid understanding of Clean Code, SOLID principles, and design patterns, along with experience in unit and integration testing.
• AI & Productivity: Practical use of AI programming assistants, e.g., Claude Code, GitHub Copilot, ChatGPT, or OpenAI API.
• Autonomy: Strong sense of ownership, self-discipline, and the ability to work effectively in a remote team.
• Polish language: Fluent proficiency - mandatory requirement.
• English language: Minimum B2 in speaking and writing.
Nice to Have
• Familiarity with Domain-Driven Design (DDD) and CQRS.
• Knowledge of Azure DB and advanced Cloud/DevOps patterns.
• Interest in integrating AI/ML into commercial applications.
• Experience in fitness, health & wellness, or other B2C solutions.
• Experience publishing and maintaining apps in the App Store and Google Play.
What We Offer
•
Compensation: 18,000–21,000 PLN net + VAT under a B2B contract.
• Paid time off: 26 fully paid days off per year.
• Remote work: 100% remote - a model we used long before it became the standard.
• Real impact: Co-shape the architecture, technical standards, and foundations of a brand-new product.
• Experienced team: Work in an interdisciplinary environment with people who share knowledge and care about quality.
• Modern stack: Projects combining .NET, React, React Native, Azure, cloud solutions, and AI tools.
• Real growth opportunities: 90% of leadership positions at Qodeca were filled via internal promotions.
• Autonomy: Trust, space for decision-making, and ownership of results.
Additional Benefits
• Lux Med private medical care.
• MultiSport card subsidy.
• Team integration events, birthday celebrations, and holiday gifts.
Want to build a product that combines .NET, web, mobile, cloud, and AI? Apply - let's talk.
At Qodeca, we create modern digital products for clients worldwide. We are looking for a Senior Fullstack Developer who is fluent in both .NET backend development and frontend/mobile applications based on React and React Native.
You will join an interdisciplinary team delivering a comprehensive product for a fitness industry client. You will have a real impact on technical solutions, code quality, and how thousands of users utilize the club's services on a daily basis.
The Project You Will Work On
We will design, build, test, and deploy a digital ecosystem for a fitness company, including:
• iOS and Android mobile application
• Web panel for employees
• Backend and integrations
• Complete deployment
What You Will Do
•
Develop the product end-to-end: Design, build, and maintain backend, web, and mobile solutions.
• Build the backend in .NET: Develop services and REST APIs using C#, .NET 10+, ASP.NET Web API, and Entity Framework Core, working with SQL Server.
• Create frontend and mobile apps: Implement features in React, React Native, and TypeScript, ensuring a consistent user experience across web, iOS, and Android.
• Design cloud solutions: Work with microservices architecture, Azure, and Docker containerization.
• Develop integrations: Connect the system with ABC Fitness, Stripe, and communication/notification services.
• Ensure quality: Apply Clean Code, SOLID principles, and design patterns, while writing unit and integration tests.
• Co-shape the architecture: Participate in design discussions, code reviews, and technical decision-making.
• Leverage AI in daily work: Utilize tools like Claude Code, GitHub Copilot, ChatGPT, or the OpenAI API to boost productivity without sacrificing quality.
• Support deployments: Collaborate on infrastructure configuration, documentation, testing, and mobile app publishing.
What We Expect From You
•
Experience: Minimum 5 years of commercial software development experience.
•
Backend: Very strong knowledge of C#, .NET Core / .NET 8+, ASP.NET Web API, Entity Framework Core, and SQL Server.
• Frontend & Mobile: Hands-on experience with React, React Native, TypeScript, JavaScript, HTML5, and CSS3.
• Architecture: Practical experience with microservices and cloud-native solutions.
• Microsoft Azure: Experience with services such as App Services, Service Bus, Azure SQL, and Azure DevOps.
• Containerization: Good knowledge of Docker and container workflows.
• Quality & Best Practices: Solid understanding of Clean Code, SOLID principles, and design patterns, along with experience in unit and integration testing.
• AI & Productivity: Practical use of AI programming assistants, e.g., Claude Code, GitHub Copilot, ChatGPT, or OpenAI API.
• Autonomy: Strong sense of ownership, self-discipline, and the ability to work effectively in a remote team.
• Polish language: Fluent proficiency - mandatory requirement.
• English language: Minimum B2 in speaking and writing.
Nice to Have
• Familiarity with Domain-Driven Design (DDD) and CQRS.
• Knowledge of Azure DB and advanced Cloud/DevOps patterns.
• Interest in integrating AI/ML into commercial applications.
• Experience in fitness, health & wellness, or other B2C solutions.
• Experience publishing and maintaining apps in the App Store and Google Play.
What We Offer
•
Compensation: 18,000–21,000 PLN net + VAT under a B2B contract.
• Paid time off: 26 fully paid days off per year.
• Remote work: 100% remote - a model we used long before it became the standard.
• Real impact: Co-shape the architecture, technical standards, and foundations of a brand-new product.
• Experienced team: Work in an interdisciplinary environment with people who share knowledge and care about quality.
• Modern stack: Projects combining .NET, React, React Native, Azure, cloud solutions, and AI tools.
• Real growth opportunities: 90% of leadership positions at Qodeca were filled via internal promotions.
• Autonomy: Trust, space for decision-making, and ownership of results.
Additional Benefits
• Lux Med private medical care.
• MultiSport card subsidy.
• Team integration events, birthday celebrations, and holiday gifts.
Want to build a product that combines .NET, web, mobile, cloud, and AI? Apply - let's talk.
🔍 Dekoder Ogłoszenia
🔴
Build a modern web and mobile product for the fitness industry from scratch - from architecture and code to deployment in the App Store and Google Play.
Oznacza to, że będziesz odpowiedzialny za cały cykl życia produktu, od początkowych założeń architektonicznych po finalne wdrożenie na platformy mobilne.
🟢
You will have a real impact on technical solutions, code quality, and how thousands of users utilize the club's services on a daily basis.
Sugestia, że Twoje decyzje techniczne będą miały znaczący wpływ na kształt produktu i jego funkcjonalność dla użytkowników.
🔴
Develop the product end-to-end: Design, build, and maintain backend, web, and mobile solutions.
Podkreśla szeroki zakres odpowiedzialności, obejmujący zarówno projektowanie, tworzenie, jak i późniejsze utrzymanie wszystkich warstw aplikacji.
🟡
Design cloud solutions: Work with microservices architecture, Azure, and Docker containerization.
Wskazuje na potrzebę znajomości nowoczesnych architektur chmurowych i narzędzi do konteneryzacji, co może wymagać nauki lub pogłębienia wiedzy.
🔴
Develop integrations: Connect the system with ABC Fitness, Stripe, and communication/notification services
Oznacza konieczność pracy z zewnętrznymi systemami i API, co może być wyzwaniem ze względu na potencjalne problemy z dokumentacją lub stabilnością tych usług.