Embedded Software Engineer (Application) (d/f/m)

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Location: Madrid, Community of Madrid, Spain

Seniority level: Mid-Senior level
Employment type: Full-time

We are seeking a highly skilled and self‑motivated Applied Embedded Systems Engineer with deep expertise in modern C++ (C++17/20), Linux internals, and application‑level networking.

In this role, you’ll contribute to the development of robust Linux user‑space services and daemons, interface with devices through protocols like SPI, I2C, and GPIO, and help shape scalable and testable code using interface‑driven design and unit testing practices.

Your ability to navigate system‑level programming with tools like systemd, journald, and various Linux diagnostics will be key to ensuring performance and reliability.

Experience with REST, MQTT,



and secure communication using TLS/mTLS will support cloud integration across our embedded systems.

Familiarity with Yocto, CI pipelines, and Agile workflows is a strong plus, as you’ll be working closely with a cross‑functional team to bring innovative and resilient solutions to life within TKE’s general product landscape.

What we expect

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- Expertise in modern C++ (C++17/20), STL, and system‑level programming using POSIX APIs.
- Practical experience writing Linux user‑space services and daemons using systemd.
- Experience with user‑space device access (serial, I2C, SPI, GPIO).
- Familiarity with CMake‑based build environments and both modular and monolithic codebase structures.
- Comfortable with interface‑driven design, dependency injection, and unit testing with mocks.
- Deep understanding of Linux internals: processes, threads, IPC, filesystems, sockets, and signals.
- Hands‑on with systemd, journald, and networking tools (ip, dnsmasq, dhcpcd, etc.).
- Competen

📌 Embedded Software Engineer (Madrid)
🏢 TK Elevator
📍 Madrid