We are looking for an experienced Backend Developer with strong skills in C# and .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 across Android and Windows.

This include building performant backend modules, enabling seamless communication with REST APIs, and contributing to robust, scalable, and maintainable application architecture.

Your contribution to something big:

• **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.

What distinguishes you:

Experience:

• 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;

• It is a plus if you 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.

Know-How:

• 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.

Languages

• Fluent in English and Portuguese (written and spoken).

Working Style and Personality:

• Structured, quality-oriented, and solution-focused working style;
• Experience working in agile or cross-functional teams;
• Team player with strong communication skills.

Work #LikeABosch means:

⚖️ Flexible work conditions

🔀 Hybrid work system

🌐 Exchange with colleagues around the world

🧑‍⚕️ Health insurance and medical office on site

📚 Training opportunities

📈 Opportunities for career progression and continuous professional development

💲 Access to great discounts in partnerships and Bosch products

🏋️ Sports and health related activities

🚉 Great access to public transports

🅿️ Free parking lot

🍽️ Canteen

Success stories don´t just happen. They are made...

Make it happen! We are looking forward to your application!

The Bosch group has more than 400 000 employees around the world, present in 60 countries, and we are proud to impact people’s lives and to work towards a more sustainable future.

Bosch Service Solutions in Lisbon develops and offers Customer Experience, Mobility, and Monitoring solutions for its clients, and plays a prominent role in providing Engineering and Software Development services in the technology market. Every day, our teams find fast, efficient, and innovative solutions for thousands of people.

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 in mindsets, cultures, generations, identities and perspectives. Everyone should bring their authenticity and work together respectfully. Bosch is an employer that values diversity and equal opportunities. We welcome applications from people with disabilities and we can provide reasonable accommodations during the recruitment process and in the performance of professional activity. By including everyone and ensuring equal opportunities we unleash our full potential.