> Markdown version of [/jobs/ext/3137678-firmware-engineer](https://www.wearedevelopers.com/jobs/ext/3137678-firmware-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Firmware Engineer - **Company:** WAVELYNX, CORP. - **Location:** United States - **Experience:** Expert - **Salary:** $120,000.0 - $150,000.0 - **Contract:** Permanent contract - **Skills:** Board Bringup, Systems Engineering, ARM Architecture, Unit Testing, C++ (Programming Language), Network Analysis, Static Program Analysis, Communications Protocols, Computer Networks, Datagram Transport Layer Security, Embedded Software, Cryptographic Protocols, Ethernet, Firmware, FreeRTOS, Google Wallet, Internet Protocol, Message Queuing Telemetry Transport (MQTT), Network Protocols, Radio-Frequency Identification, Public Key Infrastructure, Real-Time Operating Systems, RSA (Cryptosystem), Signal Integrity, Smart Cards, Systems Integration, TCP/IP, Cloud Platform System, Software Security, Bare Metal, U-Boot - **Published:** September 29, 2026 - **Apply:** https://startup.jobs/senior-firmware-engineer-wavelynx-10216587 ## About the Role * 5+ years of professional embedded software development experience using C and C++. * Strong background with real-time operating systems (FreeRTOS, Zephyr, or similar) and ARM Cortex-M microcontrollers. * Experience with logic analyzers and oscilloscopes. * Be willing to travel domestically and internationally ranging from 0 to 10 days per year. Nice to Haves * Direct background in the Physical Access Control System (PACS) industry. * Hands-on experience with NFC chipsets (e.g., ST25R-series similar), ISO 14443 Type A/B, Felica, or ISO 15693 standards. * Proven expertise with industrial or secure communication protocols (OSDP, RS-485, TCP/IP, UDP, TLS/DTLS, MQTT, or BLE stack development). * Deep knowledge of symmetric/asymmetric encryption (AES, ECC, RSA), PKI, secure boot, and hardware root-of-trust implementations. * Experience with static code analysis and RF test equipment (e.g., Proxmark, network analyzers). * Exposure to compliance and certification standards (UL 294, FCC, CE, ISO/IEC standards). ## Description We are seeking a Senior Firmware Engineer to develop and optimize current embedded products along with our next-generation of access control products. In this role, you will work closely with hardware, software, and systems engineering teams to design resilient firmware handling NFC/RFID communications, secure element integrations, cryptographic protocols, and network communications (OSDP, Ethernet, IP-based access control)., * Architect, implement, and maintain bare-metal and RTOS-based firmware for smart card readers and controllers. * Optimize high-frequency (13.56 MHz) RFID/NFC field processing, ISO/IEC 14443, ISO/IEC 18092, and MIFARE/DESFire protocols. * Integrate and secure mobile credentials, including Apple Wallet and Google Wallet credentials, using Secure Elements (SE) and Secure Application Modules (SAM). * Implement secure physical and logical communication protocols between readers, controllers, and cloud environments (e.g., OSDP, TLS/TCP/IP, RS-485, BLE, Ethernet). * Develop robust firmware update mechanisms (OTA / FOTA) over network protocols while ensuring tamper resistance and zero downtime. * Troubleshoot complex networking issues across local serial buses, IP networks, and RF interfaces. * Collaborate with hardware engineers during schematic review, board bring-up, signal integrity testing, and power management optimization. * Drive automated firmware testing, unit testing, and CI/CD pipelines for hardware-in-the-loop (HIL) environments. * Lead root-cause analysis for field escalation issues related to RF performance, timing dependencies, or protocol compliance. ## Related Videos - [Cybersecurity for Software Defined Vehicles](https://www.wearedevelopers.com/videos/725-cybersecurity-for-software-defined-vehicles) - [An Applied Introduction to eBPF with Go](https://www.wearedevelopers.com/videos/1075-an-applied-introduction-to-ebpf-with-go) - [Cyber Security: Small, and Large!](https://www.wearedevelopers.com/videos/259-cyber-security-small-and-large) - [Turning Container security up to 11 with Capabilities](https://www.wearedevelopers.com/videos/718-turning-container-security-up-to-11-with-capabilities) - [Debunking the Top 10 Myths about Web 3](https://www.wearedevelopers.com/videos/634-debunking-the-top-10-myths-about-web-3) - [Unleashing the Full Potential of the Arm Architecture – Write Once, Deploy Anywhere](https://www.wearedevelopers.com/videos/940-unleashing-the-full-potential-of-the-arm-architecture-write-once-deploy-anywhere) ## Related Articles - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 138 - Are you secure about this?](https://www.wearedevelopers.com/magazine/486-dev-digest-138-are-you-secure-about-this) - [Dev Digest 191: Malware interviews, EU ❤️ Open Source and Skilled Agents](https://www.wearedevelopers.com/magazine/645-dev-digest-191-malware-interviews-eu-open-source-and-skilled-agents) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline)