Firmware Engineer

ButterflyMX, Inc.; Irvine (CA); Ibrido; USD 150.000 - 190.000; Tempo pieno

Vantaggi offerti da questo lavoro

Medical/Dental/Vision

401(k) Match

Self-care stipends

Paid Family Leave

Employee Assistance Program

Commuter Benefits

Descrizione del lavoro

ButterflyMX, Inc. seeks a Firmware Engineer to design, implement, and debug embedded software powering its access control and IoT hardware.

You will work across bare-metal, RTOS (Zephyr), and embedded Linux environments, writing production-grade code while solving hardware interactions and security challenges. The role requires strong C/C++ skills, hands-on firmware experience, and the ability to collaborate with hardware, software, and security teams to deliver reliable, scalable products.

Competenze

• 5+ years hands-on embedded firmware development experience (8+ years preferred for senior candidates).
• Strong C/C++ skills for resource-constrained embedded systems.

Mansioni

• Develop Production-Ready Embedded Firmware across bare-metal, RTOS/Zephyr, and embedded Linux.
• Build low-level firmware for microcontrollers, peripherals, sensors, and power systems.
• Design architectures: main-loop, interrupt-driven, event-driven, multithreaded for timing and reliability.
• Own firmware from bring-up to EVT/DVT/PVT, production release, and post-launch support.
• Read schematics and collaborate with electrical/mechanical engineers on architecture and manufacturability.
• Develop secure device-to-cloud/ controller communication and secure OTA updates.
• Create ICDs, protocol specs, and documentation.
• Implement testing, CI/CD, and tooling to improve reliability and traceability.

Conoscenze

Embedded firmware

C/C++

RTOS/Zephyr

Embedded Linux

Hardware knowledge

Debugging hardware

Git

CI/CD

Strumenti

Git

CI/CD

Descrizione del lavoro

We’re growing — come grow with us. If you love technology, real estate, and improving the lives of others, we want you to join our team!

We’re 300+ team members from all over the US, Canada, and Europe

If you’re excited by technology, real estate, and building products that make everyday life better, you’ll feel at home here.

Great people are at the heart of ButterflyMX. As a distributed, mostly remote team, we’re looking for smart, curious, collaborative, and down-to-earth people who want to do meaningful work and help shape what comes next.

Our culture is transparent, flexible, and built on trust. We offer benefits designed to support your well-being and long-term growth, from a 401(k) match to quarterly self-care stipends. And while we take our work seriously, we don’t take ourselves too seriously, and there’s always room for a good laugh.

ButterflyMX was founded in 2014 with a simple idea: use technology to make the places where people live, work, and visit safe, simple, and easy to manage.

What started as a smart video intercom has grown into a unified property access and security platform used by more than 20,000 properties. Today, our technology helps owners and operators manage access, strengthen security, automate everyday workflows, and create better experiences for residents, tenants, visitors, staff, and vendors.

We’re continuing to build what’s next for property technology, bringing hardware, software, and integrations together to solve real-world challenges at scale. And we’re looking for talented people who want to help us shape the future of how people access and experience the built world.

Our team

Our team includes 300+ talented people across the United States, Canada, and Europe, including engineers, designers, customer success professionals, salespeople, and marketers. Together, we build the hardware and software that power ButterflyMX’s unified property access and security platform — helping properties automate access, operations, and security from a single system.

With four offices worldwide, including our global headquarters in New York City, our Canadian headquarters in Toronto, and our European headquarters in Croatia, ButterflyMX combines a distributed team with a shared mission: to make properties safe, simple, and easy to operate.

ButterflyMX is on a mission to empower people to automate property access, operations, and security from a single platform. Our products are installed in more than 20,000+ multifamily, commercial, gated communities, and student-housing properties worldwide, including properties developed, owned, and managed by the most trusted names in real estate. Our features are designed for developers, owners, property managers, and tenants and our products lower operating costs and improve tenant satisfaction

Our Solution

Developers and owners no longer need to run building wiring or install in-unit hardware. Property managers can grant building access, revoke permissions, and review entry logs from an online dashboard. Residents can open doors from their smartphones, issue visitor access, and see who is trying to enter the building.

Our Culture & Values

Fantastic people are the key to our success. As a distributed, primarily remote workforce, we’re looking for more intelligent, passionate, collaborative, ai-forward, and down-to-earth individuals to join our growing team. We’re driven by a shared commitment to excellence and innovation, grounded in our core values: We delight our customers, We take ownership, We are a community of collaborators, We speak up, We think big and do small, and We are tenacious.

Role Overview

At ButterflyMX, firmware sits at the critical intersection of electronics, embedded systems, product reliability, device security, and customer experience. We are seeking an exceptional Firmware Engineer to help design, build, debug, secure, and optimize the embedded software that powers our next generation of access control, intercom, IoT, wireless, and connected hardware products.

This role requires a rare combination of strong firmware development skill, deep hardware intuition, and practical embedded systems judgment. The successful candidate will be comfortable working close to the hardware — registers, buses, timing, interrupts, memory, power, analog behavior, digital interfaces, and real-world failure modes — while also understanding how embedded devices interact with secure cloud-connected systems.

Our products span multiple embedded environments, including bare-metal microcontroller firmware with main-loop architectures, RTOS-based systems including Zephyr, and embedded Linux platforms. This engineer must be able to write production-quality code independently, analyze and optimize firmware at a low level, troubleshoot hardware/firmware interactions, and use AI tools intelligently to accelerate development without outsourcing engineering judgment.

This is a hands-on, high-impact engineering role for someone with initiative, tenacity, curiosity, and the ability to solve ambiguous problems across hardware, firmware, manufacturing, and field reliability.

Responsibilities

Develop Production-Ready Embedded Firmware

Design, write, debug, and maintain firmware across bare-metal, RTOS/Zephyr, and embedded Linux platforms.

Build reliable low-level firmware in C/C++ and other relevant firmware languages for microcontrollers, peripherals, sensors, communication interfaces, power systems, and device control logic.

Develop main-loop, interrupt-driven, event-driven, and multithreaded architectures optimized for timing, memory, latency, power, boot time, and long-term reliability.

Own firmware from board bring-up and prototype development through EVT/DVT/PVT, production release, and post-launch support.

Bridge Hardware, Firmware, and Real-World System Behavior

Work close to the hardware, including registers, buses, interrupts, ADCs, power rails, signal integrity, timing, noise, grounding, and analog/digital interactions.

Read schematics, understand PCB layouts, and collaborate with electrical and mechanical engineers on architecture, bring-up, manufacturability, thermal behavior, EMI/EMC, and field installation constraints.

Diagnose multi-domain failures using oscilloscopes, logic analyzers, debuggers, multimeters, power analyzers, and other lab tools.

Build firmware that is resilient to power instability, brownouts, signal noise, temperature extremes, communication faults, installation variability, and device aging.

Build Secure Connected IoT Device Firmware

Implement secure boot, bootloaders, chain of trust, signed firmware, certificate signing, key provisioning, device identity, and image validation.

Support secure OTA updates, rollback protection, version control, recovery behavior, and firmware authenticity.

Develop secure device-to-cloud and device-to-controller communication using appropriate authentication, cryptographic, and transport-layer protections.

Partner with security, cloud, and systems teams on device hardening, credential management, threat modeling, and secure manufacturing provisioning.

Implement Embedded Communication Protocols

Develop and debug firmware for I2C, SPI, UART, GPIO, ADC, PWM, RS-485, USB, Ethernet, BLE, Wi‑Fi, and cellular-connected systems as applicable.

Implement reliable protocol handlers for access control, device-to-device, device-to-controller, and device-to-cloud communication.

Build robust error handling, retries, timeouts, diagnostics, telemetry, and graceful degradation into communication paths.

Create and maintain Interface Control Documents, protocol specifications, state diagrams, register maps, and integration documentation.

Drive Firmware Quality, Testability, and Reliability

Design firmware with observability, diagnostics, manufacturability, and field support in mind from the beginning.

Support built-in self-test, production test firmware, manufacturing diagnostics, burn‑in, hardware validation, and release readiness workflows.

Develop unit tests, integration tests, hardware-in-the-loop tests, regression tests, and automated validation tools where appropriate.

Use disciplined engineering practices including code review, version control, CI/CD, static analysis, issue tracking, release notes, and root-cause documentation.

Partner with Quality, Support, Manufacturing, and Operations to analyze RMA trends, field failures, intermittent faults, and reliability issues.

Use AI Tools Responsibly to Increase Engineering Leverage

Use AI models and engineering tools to accelerate code development, debugging, test creation, documentation, and design exploration.

Independently validate AI-generated code, assumptions, and recommendations before using them in production systems.

Maintain full ability to write, review, debug, optimize, and explain firmware without relying on AI as a substitute for engineering judgment.

Solve Ambiguous Problems with Initiative and Tenacity

Approach problems holistically across electronics, firmware, mechanical constraints, manufacturing variation, installation conditions, cloud interaction, and customer impact.

Prototype quickly, test carefully, learn from data, and iterate toward robust production-ready designs.

Challenge assumptions, identify hidden failure modes, communicate tradeoffs clearly, and propose better architectures when the obvious path is not good enough.

Requirements

5+ years of hands‑on embedded firmware development experience; 8+ years is preferred for senior‑level candidates.

Strong firmware development skills in C/C++, with experience writing production code for resource‑constrained embedded systems.

Hands‑on experience with bare-metal microcontroller firmware, RTOS-based systems, and embedded Linux. Experience with Zephyr is strongly preferred.

Strong understanding of microcontroller architecture, interrupts, timers, DMA, memory maps, bootloaders, watchdogs, peripheral drivers, low‑power modes, and low-level register programming.

Deep practical understanding of electronics hardware, including digital and analog domains, power regulation, ADCs, signal conditioning, filtering, impedance, noise, grounding, and signal integrity.

Experience debugging real hardware using oscilloscopes, logic analyzers, debuggers, programmers, multimeters, and other lab equipment.

Experience with embedded communication interfaces such as I2C, SPI, UART, CAN, RS-485, USB, BLE, Wi‑Fi, Ethernet, and cellular-connected systems.

Experience with secure boot, firmware signing, certificate signing, device identity, key provisioning, encrypted communications, and secure OTA update mechanisms.

Experience developing firmware for connected IoT products, ideally including products deployed in commercial, industrial, access control, building systems, consumer electronics, or field‑installed environments.

Familiarity with higher-level communication patterns and protocols such as MQTT, REST, WebSockets, TLS, device‑to‑cloud APIs, and remote device management.

Ability to read schematics, understand PCB layouts, reason about hardware behavior, and collaborate effectively with electrical engineers.

Ability to troubleshoot multi-domain failures involving hardware, firmware, networking, environment, manufacturing, and customer installation factors.

Experience with Git, CI/CD, automated testing, static analysis, issue tracking, release management, and disciplined software development practices.

Strong documentation skills, including design notes, ICDs, state diagrams, test plans, debug guides, release notes, and technical decision records.

Strong initiative, tenacity, lateral thinking, and comfort operating in fast-moving product development environments.

AI‑forward mindset with the engineering maturity to use AI tools as accelerants, not substitutes for deep technical understanding.

Compensation

The expected base salary range for this position is $150,000-$190,000. Actual compensation will depend on factors including budget, skills, experience, location, and internal equity. This position may also be eligible for bonuses, equity, or other forms of compensation, where applicable.

Comprehensive Medical, Dental and Vision plans (ButterflyMX covers 80% of the cost) starting day 1

401(k) plan with a match

Basic Life and Accidental Death and Dismemberment Insurance (ButterflyMX covers 100% of the cost)

Short and Long Term Disability (ButterflyMX covers 100% of the cost)

Paid Family Leave

Employee Assistance Program

Quarterly self-care stipends

Access to optional benefits including pre-tax flexible healthcare spending accounts (FSA and HSA), Dependent Care FSA, and Commuter Benefits, as well as optional Supplemental Life, AD&D, Hospital Indemnity, Legal, Accident, Critical Illness, Pet, and Personal Liability Insurance

And more!

ButterflyMX is an equal opportunity employer and we value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. You must have the authorization to work in the US to become an employee. We strive to create an accessible and inclusive experience for all candidates and employees. If you need reasonable accommodations during the application or the recruiting process, please let our recruiting team know.