Senior C++ Software Engineer - Hardware Systems Barcelona, Spain | Hybrid - 2 days onsite per week We're looking for a strong hands-on C++ engineer who enjoys working close to real hardware and solving complex system-level problems. You'll join the Barcelona R&D; team of a large, established general technology company, working on next-generation software for complex, high-performance hardware systems. The work sits across application software, hardware interfaces, drivers and high-speed data streaming, within a long-term and well-established R&D; programme. This is particularly suited to an engineer who enjoys getting beneath the application layer, understanding how the complete system behaves, debugging across different layers, and solving performance and integration problems.
What You'll Work On Develop Modern C++ (primarily C++17) software for complex instrumentation systems
Build Windows applications that interface with devices, boards and specialised hardware
Work with high-speed PCIe and Ethernet data streaming
Debug across application code, drivers, interfaces and hardware behaviour




Develop multithreaded, performance-sensitive software
Support system integration, validation and testing within an R&D;/lab environment
Work primarily in Windows, with some Linux development
What We're Looking For Strong commercial, hands-on Modern C++ experience, ideally C++17+
Strong experience developing software in Windows environments
Experience working close to hardware - instrumentation, devices, boards, embedded systems or similar
Good understanding of multithreading, concurrency and performance optimisation
Strong debugging and problem-solving skills across complex software/hardware systems
Experience with PCIe, Ethernet, drivers, networking or high-throughput data systems would be particularly relevant
Contract & Long-Term Opportunity Initial 6-month freelance/autónomo contract, with strong extension potential and clear long-term scope
40 hours per week
Hybrid working - typi

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