> Markdown version of [/jobs/ext/4281439-senior-software-engineer-firmware](https://www.wearedevelopers.com/jobs/ext/4281439-senior-software-engineer-firmware). 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).

---

# Senior Software Engineer, Firmware

- **Company:** Self Esteem Brands, LLC
- **Location:** Woodbury, MN, United States (Remote available)
- **Experience:** Expert
- **Salary:** $140,000.0 - $155,000.0
- **Contract:** Franchise
- **Skills:** Java (Programming Language), .NET Framework, Arduino, Audio Signal Processing, Automation of Tests, Bluetooth Low Energy (Bluetooth), C++ (Programming Language), Mobile Application Development, Software as a Service, Cloud Engineering, CMake, Computer Engineering, Continuous Integration, Software Debugging, Firmware, Github, Hardware Design, OAuth, OpenSSL, X.509, Raspberry Pi, RS-485 Standard, Software Engineering, Systems Integration, Toolchain, Wireshark, Video Editing, Multithreading, PIC Microcontroller, Computer Network Technologies, Backend, Kotlin, Build Tools, Hardware Infrastructure, Teamcity, Terraform, Microservices
- **Published:** October 7, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=8bcc625f3f750491

## About the Role

Our systems combine custom ICs, bespoke vendor hardware, and off-the-shelf components that bring our 7000+ studios to life for our millions of global members. An ideal candidate will have a baseline of embedded engineering experience in addition to familiarity with a connected system (mobile, backend, or other very extensive hardware experience)., * Proven ability to set and hit commitments while maintaining technical excellence

 * Proven ability to self-direct and organize in a fast-paced distributed collaborative environment
 * Proficiency in writing firmware for microcontrollers (C/C++)
 * Proficiency in multithreaded applications (mutexes/threads/pthreads/etc.)
 * Experience in writing and integrating automated test cases (GTest, GMock, etc.) Deep knowledge in at least one "Nice-to-have" section below
*

Nice-to-have - Extensive Hardware

 * Over 5 years of experience developing hardware products from design to rollout
 * Experience integrating I2C / RS485 / SPI / BLE / digital IO
 * Deep experience with a variety of microcontrollers or projects (ESP32, nRF, Raspberry Pi / Arduino, etc.)
 * Experience reading and debugging wiring diagrams
 * Experience designing hardware projects end-to-end
 * Experience reading and integrating technical specification documentation
 * Experience working with contract manufacturers and logistics
 * Experience with toolchains and build chains (CMake/linkers/etc.) Proven ability debugging intricate hardware problems at global scale
*

Nice-to-have - Extensive Backend

 * Over 5 years of experience delivering real-time connected backend systems
 * Experience developing cloud-native backend applications (.NET/Java/Kotlin/other)
 * Experience developing and integrating microservices
 * Experience developing and integrating AuthZ/AuthN/OAuth2
 * Experience managing certificates and working with cryptographic tools (TLS certificates, OpenSSL CLI, X509 certificates, asymmetric and symmetric keys, etc.)
 * Experience with Infrastructure as Code (Terraform/CDK/other) Experience developing build systems and/or managing CI/CD (GitHub Actions, TeamCity, etc.)
*

Nice-to-have - Mobile

 * Experience in mobile development (iOS or Android or both)
 * Experience interfacing with microcontroller BLE in Peripheral and Central modes Experience developing real-time hardware integrations at high fidelity (audio processing, video processing, high frame rates with minimal jitter)
*

Things that would excite us about you

 * Deep interest in all forms of technology
 * Professional or personal projects leveraging microcontrollers
 * Projects involving devices communicating with one another in interesting ways
 * Experience with packet-capture tooling (Wireshark, Logic Analyzers, BLE capture, etc.) or deep networking technology (TCP/UDP/ARP/low-level network stacks)
 * Experience with Apple, Google, or Samsung Wallet development and integration Degree in an appropriate field (Computer Engineering, Software Engineering with a hardware emphasis, etc.)
*

## Description

* Collaborate with the broader Edge Engineering firmware, backend, QA, and lead engineers
 * Design, write, and maintain C++ firmware code for our Access Control System
 * Manage the integration between our hardware and backend systems
 * Identify, design, and develop internal tools for fleet management
 * Write and maintain our automated testing suite Write and maintain our technical documentation
*

Hardware Responsibilities (20% of time)

 * Work with hardware design vendors to spec and deliver new hardware revisions
 * Write, develop, and execute acceptability and manual test plans Assist our dedicated support team in debugging intricate hardware problems globally
*

Cross-Team Collaboration (20% of time)

 * Become the go-to resource for answering deep technical questions on our hardware technology stack
 * Collaborate with our hardware & SaaS vendors to maintain excellent working relationships Collaborate with our Supply Chain, Warehouse, and Provisioning teams to ensure stable product is always available
*