Embedded Linux Engineer - eMMC Driver

Role Summary :

Our client is looking for an experienced Embedded Linux Engineer to optimize and maintain a Yocto-based BSP running on TechNexion PICO-IMX6 DualLite (NXP i.MX6) platform. The board is already brought up and running (Yocto Zeus). The role focuses on performance optimization, BSP maintenance, kernel patching, boot-time reduction, Bluetooth stack updates, and long-term maintainability.

Key Responsibilities :

- Maintain and enhance Yocto BSP for PICO-IMX6 DualLite.

- Migrate from Yocto Zeus to a newer LTS (e.g., Dunfell/Kirkstone) after feasibility assessment.

- Pull and integrate latest stable kernel patches (NXP + mainline where applicable).

- Optimize boot time (target: measurable improvement with profiling).

- Remove unnecessary services, daemons, and packages to reduce footprint.

- Improve system startup sequencing (systemd optimization).

- Update and stabilize Bluetooth stack (BlueZ patches, firmware updates).

- Kernel configuration optimization (defconfig cleanup).

- Improve power optimization and CPU governor tuning.

- Debug performance issues (CPU load, memory usage, I/O bottlenecks).

- Maintain proper Yocto layer hygiene and documentation.

Required Skills :

1. Core :

- Strong experience with Yocto Project (meta layers, recipes, bbappend, bitbake debugging).

- Experience working with NXP i.MX6 platform.

- Linux kernel configuration and patching experience.

- Systemd service optimization and boot profiling.

- Strong debugging skills (dmesg, perf, ftrace, systemd-analyze).

- Experience with BlueZ stack and Bluetooth bring-up.

- Cross-compilation and toolchain management.

- Git workflow and patch management.

2. Preferred :

- Experience migrating Yocto versions (Zeus - Dunfell/Kirkstone).

- Familiarity with U-Boot optimization.

- Experience with embedded power optimization.

- Understanding of secure boot and OTA concepts.

- Exposure to Qt-based systems (advantage).

Deliverables :

- Define and maintain the storage layout for eMMC/SD: boot partitions + rootfs + data/logs + update slots (if applicable).

- Boot time reduction.

- Removal of redundant services/packages.

- Stable Bluetooth stack with latest patches.

- Updated kernel with critical fixes merged.

- Documentation of Yocto layers and build process.

- Migration plan to newer Yocto LTS.

- Minimum 4+ years hands-on Yocto experience.

- Prior experience with NXP SoCs preferred.

(ref:hirist.tech)