Backend Developer (C# / .NET MAUI - Multi-Platform Apps)

Descripción del puesto:

Company Description:

At Bosch, we shape the future by inventing high-quality technologies and services that spark enthusiasm and enrich people's lives. Our promise to our associates is rock-solid: we grow together, we enjoy our work, and we inspire each other. Join in and feel the difference.
With over 300 specialized associates and around 15 nationalities, Bosch activities in Lisbon are focusing on sales, marketing, communication, training, nearshoring services and shared support for human resources services to Europe. The diversity, commitment and know-how of the team are the key success factors of this organization.
Bosch Service Solutions develops and delivers Customer Experience, Mobility and Monitoring solutions for companies and their customers.
Our teams find fast and efficient solutions for thousands of people on a daily basis - from claim management to life-saving emergency calls, among other services. Define the standards and become a pioneer together with around 9000 associates worldwide.

Job Description:

About the Role
We are looking for an experienced Backend Developer with strong skills in C# and the .NET ecosystem, ideally with exposure to .NET MAUI or cross-platform application architectures. You will help design and develop the backend logic, services, local engines, and integration layers that power our multi-platform applications targeting Android and Windows.
This role involves building performant backend modules, enabling seamless communication with REST APIs, and contributing to robust, scalable, and maintainable application architecture.

What you will do
Backend Development (C# / .NET)
* Develop backend components, services, and business logic for .NET MAUI applications.
* Implement data handling, synchronization flows, caching, and processing pipelines.
* Create modular backend libraries reusable across Android, Windows, and web environments.
Integration & API Communication
* Consume REST APIs and implement secure, fault-tolerant communication flows.
* Design API clients, network layers, and structured request/response models.
* Work with backend teams to refine API contracts and optimize data exchange.
Multi-Platform Architecture
* Contribute to building cross-platform backend capabilities inside .NET MAUI apps.
* Ensure backend components perform reliably across different platforms and device constraints.
* Optimize for performance, memory usage, and offline scenarios.
Embedded HTTP Services
* Contribute to features involving lightweight HTTP servers or local service endpoints.
* Help implement local REST/HTTP communication between components.
Quality, Optimization & Tooling
* Write maintainable, testable, well-structured C# code.
* Perform performance profiling, debugging, and optimizations.

Qualifications:

Technical Skills
* Backend development experience with C# and .NET.
* Experience building backend services, business logic layers, or modular libraries.
* Strong understanding of REST APIs, HTTP communication, serialization, and error handling.
* Familiarity with asynchronous programming, multithreading, and performance optimization.
* Experience working with .NET MAUI, Xamarin, or other cross-platform frameworks (or willingness to learn MAUI quickly).
* Good understanding of application lifecycle on Android or Windows.
Nice-to-have
* Experience with offline-first architectures or local data storage (SQLite, Realm, etc.).
* Knowledge of dependency injection frameworks in .NET (Microsoft.Extensions, Autofac, etc.).
* Familiarity with embedded HTTP servers or local networking patterns.
* Experience with CI/CD pipelines for .NET or mobile development.
Key Competencies
* Technical Mastery: Strong understanding of backend architecture and C# patterns.
* System Thinking: Ability to design backend flows that support cross-platform behaviors.
* Problem Solving: Capable of diagnosing complex performance and integration problems.
* Collaboration: Communicates effectively with frontend, mobile, QA, and backend teams.
* Adaptability: Comfortable working across mobile, desktop, and API-driven environments.
* Quality Focus: Delivers clean, reliable, and well-tested backend code.

Additional Information:

What we offer you:
Challenges in an international environment | career opportunities in one of the best companies in the world | flexible hours | medical services | discounts for employees | sports and health related activities | canteen | good access to public transports | space for creativity.
Success stories don´t just happen. They are made...
Make it happen! We are looking forward to your application