Staff Software Engineer - Embedded Networking (remote)

Staff Software Engineer, Embedded NetworkingJohnson Controls, a global leader in thermal management, mission-critical building systems, energy efficiency, and decarbonization, helps customers use energy more productively, reduce carbon emissions, and operate with the precision and resilience required in rapidly expanding industries such as data centers, healthcare, pharmaceuticals, advanced manufacturing, and higher education.For more than 140 years, Johnson Controls has delivered performance where it really matters. Backed by advanced technology, lifecycle services and an industry-leading field organization, we elevate customer performance, turn goals into real-world results and help move society forward.Our Airwall Zero Trust technology secures mission critical assets around the world. It provides encrypted remote access, protects communication from the edge to the cloud, and makes legacy infrastructure invisible to discovery and attack. For operators running equipment that cannot be patched or taken offline, that combination is the difference between a contained incident and a shutdown.The Staff Software Engineer, Embedded Networking, is a hands-on engineering role at the core of the product. You will extend Airwall onto new classes of devices, modernize a technology stack that has to keep pace with a fast-moving market, and strengthen our competitive position in operational technology security. The work runs from constrained embedded targets up through the secure data path, and it stays close to the code.Few engineers arrive fluent in identity-based overlay networking, so we hire for systems depth and expect you to pick up the protocol work quickly. You don't have to be a recognized authority on zero trust networking or IPsec on day one, and by the time you're finished here, you will be.This is a remote position for US based candidates.Extend Airwall onto new classes of devices and hardware targets, taking the platform into environments it does not reach todayOwn the embedded software running on constrained targets, including OpenWRT, and ARM-based platformsWork deep in the secure data path: identity-based overlay networking, IPsec and ESP, IKE, tunnel encapsulation, NAT traversal, Layer 2 connectivity carried over Layer 3, and certificate-based identity backed by PKIModernize the Airwall technology stack, retiring what has aged and raising the ceiling on performance, observability, and maintainabilityDiagnose hard networking failures in live customer environments, down to packet-level analysisContribute to core codebases and raise the standard for code quality, testing, and performanceMentor engineers across the team and serve as a technical role model8+ years shipping production networking software, with significant time on embedded or kernel-adjacent systemsDeep expertise in C, C++, or Rust, with the ability to work across all threeCommand of the networking stack from Layer 2 through Layer 4, including the judgment to reason about a failure from the wire upward and read a packet capture unaidedHands-on embedded Linux experience on resource-constrained hardware, or OpenWRTWorking knowledge of encrypted transport such as IPsec, ESP, and IKE, along with certificate-based identity and PKIA track record of shipping into environments where downtime carries real consequencesClear communication and the judgment to work well across product and engineering teamsExperience with Host Identity Protocol (RFC 7401) or another identity-based networking overlayBackground in operational technology or industrial control systems, including protocols such as BACnet or ModbusExposure to hardware bring-up, board support packages, or firmware release engineeringContributions to open source networking projectsWe build with AI in the loop. We expect you to use coding harnesses such as Claude, Copilot, Codex, or Cursor as part of your normal workflow, and to have the judgment to know where they help and where they get in the wayWe stay close to customers. You will talk directly with the people running the networks you protectWe measure ourselves on what reaches production and holds up thereHIRING SALARY RANGE: $130,000 - $180,000 (Salary to be determined by the education, experience, knowledge, skills, and abilities of the applicant, internal equity, and alignment with market data.) This role offers a competitive Bonus plan that will take into account individual, group, and corporate performance. This position includes a competitive benefits package. The posted salary range reflects the target compensation for this role. However, we recognize that exceptional candidates may bring unique skills and experiences that exceed the typical profile. If you believe your background warrants consideration beyond the stated range, we encourage you to apply. To support an efficient and fair hiring process, we may use technology assisted tools, including artificial intelligence (AI), to help identify and evaluate candidates. All hiring decisions are ultimately made by human reviewers. For details, please visit the About Us tab on the Johnson Controls Careers site at Controls International plc. is an equal employment opportunity and affirmative action employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, protected veteran status, genetic information, sexual orientation, gender identity, status as a qualified individual with a disability or any other characteristic protected by law. To view more information about your equal opportunity and non-discrimination rights as a candidate, visit EEO is the Law. If you are an individual with a disability and you require an accommodation during the application process, please visit here.