Senior Embedded Engineer (ARM Cortex-M, Fixed-Point Optimization, FEC)

About the Position

We are seeking a Senior Embedded Engineer with expertise in ARM Cortex-M, fixed-point optimization, and Forward Error Correction (FEC) for our advanced communication system. This role is remote and full-time.

You'll be developing a critical error correction component utilizing Shortened Polar Codes for our advanced communication system. The implementation targets embedded ARMv7M microcontrollers (Cortex-M series), demanding meticulous optimization without relying on floating-point arithmetic operations. Your work will directly impact system reliability and performance in mission-critical applications.

Responsibilities

• Select optimal parameters for Shortened Polar Codes implementation based on rigorous mathematical analysis and system requirements.
• Develop highly efficient C/C++ (C++17/20) implementation optimized specifically for ARMv7M architecture with strict memory constraints.
• Engineer solutions that completely avoid floating-point arithmetic while maintaining algorithmic integrity and performance.
• Evaluate, adapt, and extend existing library implementations to support shortened codes according to project specifications.
• Implement fixed-point arithmetic solutions that maximize computational efficiency on target hardware.
• Document implementation decisions, optimization techniques, and parameter selection rationale thoroughly.
• Collaborate with cross-functional engineering teams to integrate your implementation into the broader system architecture.
• Conduct comprehensive performance analysis and validation against theoretical error correction capabilities.

Requirements

• 5+ years of professional experience developing optimized C/C++ code for embedded systems.
• Demonstrable expertise with modern C++ standards (C++11/14/17) applied to resource-constrained environments.
• Strong understanding of ARMv7M architecture, instruction set, and optimization techniques.
• Proven track record implementing and optimizing complex algorithms for embedded platforms.
• Excellent knowledge of fixed-point arithmetic implementation strategies and trade-offs.
• Ability to analyze, understand, and adapt complex mathematical algorithms to efficient code.
• Experience with embedded development toolchains, debugging techniques, and performance profiling.
• Strong mathematical foundation, particularly in information theory or error correction coding.
• Exceptional problem-solving skills with attention to algorithmic efficiency and code quality.

Nice to Have

• Previous work with Polar Codes, LDPC, Turbo codes, or similar error correction algorithms.
• Experience with GNU Radio implementations or similar SDR frameworks.
• Familiarity with ARM CMSIS libraries and optimization techniques for Cortex-M processors.
• Background in digital communications systems or signal processing.
• Knowledge of bare-metal programming for microcontrollers.
• Contributions to open-source projects related to embedded systems or communications.
• Experience optimizing algorithms for extremely constrained memory environments.

Project Specifications

• Data packet size: 27 bytes (32 bytes with 5 bytes shortened).
• Useful data payload: 18 bytes.
• Target platform: ARMv7M (ARM Cortex-M series).
• Implementation language: C/C++ (preference for modern C++ where appropriate).
• No floating-point arithmetic permitted in the implementation.
• Specific decoding algorithm variant can be negotiated based on implementation considerations.