Senior Firmware Engineer

Softeq; Poland; On-site; PLN 281,000 - 346,000; Full time

Job summary

Softeq is seeking a Senior Firmware Engineer in the Embedded Systems department. You will own firmware on the nRF7120 / Zephyr platform, drive DK bring-up, Kconfig, and device tree, and build native Zephyr connectivity across Wi‑Fi, Bluetooth, and cellular.

Collaboration with hardware, software, QA, and systems teams is essential. The role requires 8+ years of embedded firmware with Zephyr/nRF Connect SDK on real hardware, Nordic MCU experience, and strong power-optimization knowledge.

Qualifications

• 8+ years of hands-on embedded firmware development.
• Experience shipping Zephyr / nRF Connect SDK on real hardware.
• Proficiency with Kconfig and device tree.
• Zephyr Bluetooth host with GATT-service porting, Wi-Fi and cellular knowledge.
• Nordic MCU and peripherals experience (PWM, ADC, DAC, CAN, UART).
• Experience with firmware-level power optimization techniques.
• English language skills (min. B2).

Responsibilities

• Own firmware on the nRF7120 / Zephyr NCS platform (DK bring-up, Kconfig, device tree).
• Develop native Zephyr connectivity: Wi-Fi, Bluetooth host, and cellular via modem subsystem.
• Improve firmware observability with Memfault: coredumps, metrics, OTA campaigns, monitoring.
• Maintain firmware quality with CI, unit tests, and injectables.
• Collaborate with hardware, software, QA, and systems teams.

Skills

Embedded firmware

Zephyr / nRF Connect SDK

Kconfig and device tree

Bluetooth / GATT

Power optimization

AI-assisted coding tools

English communication (B2)

Education

Bachelor’s degree in Computer Science or Electrical Engineering

Tools

Zephyr

nRF Connect SDK

Kconfig

Device Tree

Job description

Established in 1997, Softeq was built from the ground up to specialize in new product development and R&D, tackling the most difficult problems in the tech sphere. Now we've expanded to offer early-stage innovation and ideation plus digital transformation business consulting. Our superpower is to deliver all of this under one roof on a global scale. So let's get started and build a better future together!

Softeq is looking for a Senior Firmware Engineer in the Embedded Systems department.

We're building new silicon based product: the Nordic nRF7120 (Wi-Fi 6 + Bluetooth LE + companion cellular) running Zephyr via the nRF Connect SDK and looking for the primary Zephyr voice on the team.

This position will require firmware architecting and in collaboration with multi-disciplinary team design and development a single shared business-logic core, serves both, the incumbent STM32 platform and the new Nordic platform for years to come.

Salary Range: €65,000.00 To €80,000.00 Annually

Responsibilities

• Own firmware on the nRF7120 / Zephyr NCS platform: DK bring-up, Kconfig + device tree structure, thread topology, little fs storage, MCU boot/DFU;
• Build native Zephyr connectivity: Wi-Fi, Bluetooth host, and cellular via the Zephyr modem subsystem;
• Own firmware observability with Memfault: coredumps, metrics, OTA campaigns, alerting — a first-class quality-and-velocity investment for the whole team;
• Set the bar for firmware quality: host-build CI as a compile firewall, unit-testable C with injectable fakes, replay-harness behavior-preservation;
• Collaborate with hardware, software, QA, and system engineering teams.

Requirements

• 8+ years hands-on embedded firmware, including 3+ years shipping production Zephyr / nRF Connect SDK code on real hardware;
• nRF7120 (rare) or adjacent nRF52/nRF53/nRF91 experience;
• Production fluency in Kconfig and device tree;
• Zephyr Bluetooth host with real GATT-service porting, native Zephyr Wi-Fi, cellular over the modem subsystem;
• Nordic Semiconductor MCU and hardware peripherals experience (e.g. PWM, ADC, DAC, CAN, UART, etc.);
• Experience with firmware-level power optimization techniques;
• You use AI-assisted coding tools (Claude Code, Cursor, Copilot) in daily work;
• Experience with firmware-level power optimization techniques;
• Consumer IoT consumer-connected-hardware device firmware background (wearables, trackers, connected devices);
• Real overlap with CET/EET business hours; a long-term (2+ year) commitment;
• English language written and verbal communication skills (min. B2 level);
• Bachelor’s degree in Computer Science, Electrical Engineering or related field.

Softeq communicates only from @softeq.com email addresses. We never request payments or fees for any reason during hiring — including trainings or courses to be completed, equipment, onboarding, or background checks — and we will not ask for banking information, cryptocurrency or gift cards. If you receive a message from any other domain or requesting payment, do not respond and report it to [e-mail]