Senior C++ Software Engineer – Hardware-Connected Systems Barcelona, Spain | Hybrid – typically 2 days onsite per week

We’re looking for an experienced, hands‑on C++ engineer who enjoys developing Windows software, working close to real hardware and solving challenging integration and performance problems.

You’ll join the Barcelona R&D; team of a large, established general technology company, developing software for complex, high‑performance hardware systems within a long‑term engineering programme.

The role combines application and system‑level development with device communication, hardware interfaces and data processing. It would suit someone who enjoys understanding how the complete system works and investigating problems across software and hardware boundaries.

What You’ll Work On

Develop and maintain modern C++ software, primarily using C++17

Build Windows applications and system components that communicate with specialised devices and hardware

Develop multithreaded software and improve performance, reliability and data handling

Investigate integration issues across application code, interfaces, drivers and connected equipment

Work with technologies including PCIe and Ethernet for high‑speed data transfer

Support system integration, debugging, validation and testing within an R&D;/lab environment

Work primarily on Windows, with some Linux development





What We’re Looking For

Strong commercial experience developing substantial applications or system software in modern C++

Proven experience developing C++ software that runs on Windows

Experience with hardware‑connected software, device communication or comparable systems integration

A good understanding of multithreading, concurrency and performance optimisation

Strong debugging skills and a practical, methodical approach to solving technical problems

The ability to take ownership of your work and collaborate with an international engineering team

Hybrid working – typically 2 days per week onsite in Barcelona

An established, ongoing R&D; programme with long‑term scope

Useful, but not essential:

experience with instrumentation, PCIe, Ethernet, device drivers, data acquisition or high‑throughput streaming.

You don’t need experience with every technology listed. Strong Windows C++ development and transferable hardware‑facing systems experience are the priorities. Relevant backgrounds could include industrial automation, scientific or medical equipment, simulators, robotics and other device‑connected applications.

If you enjoy building C++ software that interacts with real equipment and solving complex debugging and performance challenges, I’d be happy to tell you more.

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📌 Senior Software Engineer (Madrid)
🏢 Script & Dot
📍 Madrid