Senior Embedded Engineer

Seeking a Senior Embedded C engineer with experience in ARM Cortex-M platforms, especially STM32, to develop and optimize firmware for connected devices. The role involves working on multi-radio architectures, integrating AI tools, and collaborating across hardware and software teams in a fully remote environment.

Location: Remote (Europe)

Salary: 110-190 PLN/h net B2B

Responsibilities

• Build and maintain embedded firmware in C for STM32-based connected devices
• Work inside the Modus SDK and the broader Cypress/Infineon ecosystem to make hardware do what the spec says, and a few things it didn't
• Integrate and tune FreeRTOS: tasks, priorities, queues, interrupts, the whole discipline of not breaking real-time behavior
• Tackle multi-radio architectures in practice: BLE and Wi-Fi coexistence, arbitration, throughput versus power trade-offs
• Collaborate closely with hardware, mobile, QA, and the client's engineering team on cross-functional problems
• Debug the unglamorous stuff: logic analyzer, scope, sniffer, logs that don't want to exist
• Contribute to architecture decisions, code reviews, and knowledge-sharing inside the Firmware & Hardware chapter
• Use AI tools as part of your daily workflow, not as a party trick

Requirements

• 5+ years of hands-on embedded C development on ARM Cortex-M platforms
• Strong, proven STM32 experience (not "I ran one tutorial")
• Real work with the Modus SDK, or at the very least solid time inside the Cypress/Infineon ecosystem
• Proven experience with multi-radio architectures, especially BLE and Wi-Fi coexistence: timing, arbitration, co-existence schemes, real-world throughput issues
• Comfortable reading schematics, board files, datasheets, and errata without flinching
• Fluent with the debugging toolkit: JTAG/SWD, logic analyzers, scopes, BLE sniffers, serial tracing
• English at B2+, because our clients are mostly US-based
• Problem-solving over line-counting: we'll take a creative thinker over a fast typist any day
• Initiative, ownership, and the kind of communication where people don't have to guess what you meant

Benefits

• Truly flexible hours (most of the team works 10-18 CET, but you organize your day)
• Access to our internal knowledge-sharing: tech talks, experiments, side projects

Additional Information

• During the freelance period there's no paid leave or medical benefits. Those come with the permanent contract, and we're transparent about that upfront.
• The entire process is in English. All interviews are recorded for internal evaluation purposes.
• New engineers go through a structured ramp-up period before landing on target projects: you'll work alongside the team, get paired with a technical buddy, and tackle progressively bigger tasks so both sides can see how the collaboration feels.