Senior Software Engineer

Sr. Software Engineer - Systems LevelBellevue, Washington OR Santa Clara, CaliforniaMeet YubicoYubico is a global leader in identity security and creator of the YubiKey, the original hardware-backed passkey. We are publicly traded on Nasdaq Stockholm; our global footprint includes headquarters in Stockholm, Sweden, Silicon Valley, California; and Singapore.Why Join Our Mission?At Yubico, we are guided by a shared belief that your work matters. We operate under a cultural philosophy of Speed with Integrity, pushing the boundaries of technology to secure the AI frontier—protecting both human and agentic AI interactions—and leading the transition to post-quantum cryptography. In everything we do, we live by our core values:Battle Friction: We constantly look for new ways to simplify our products, our work, and the user experience.Inspire Higher: We think big, champion the open internet, and strive to do the right thing even when it is difficult.One Team: We are open, responsive, and collaborative, overcoming challenges and celebrating our successes together.Aligned with our commitment to open standards, we foster a thriving builder ecosystem through the Yubico Developer Program, offering free open-source repositories, libraries, and SDKs to help developers rapidly integrate strong hardware authentication into any application. Through close collaborations with technical partners like Google, Microsoft, and Amazon, as well as newer frontiers like OpenAI, we continue to shape a safer digital world while donating security keys to protect vulnerable communities, journalists, and humanitarian groups worldwide through our Secure it Forward program.The RoleYubico is looking for a Sr. Software Engineer who is innovative and has a passion for building security solutions and software. You will join our Production and Fulfillment Services (PFS) team. The PFS team develops the software systems that control our YubiKey production, fulfillment, and manufacturing. They build integrated end-to-end solutions for production software to enhance and scale our capabilities and ease of use for our operators and supervisors.Tasks & Responsibilities:Design, propose, and refactor applications and integrations that enable Windows desktop operators to leverage the full capabilities of our custom production equipment.Experiment, create prototypes and refine your work based on user feedback, industry standards, and business needs.Work collaboratively across functions with our Product Managers, Production, Hardware, and UX designers to bring the most user-friendly and streamlined software for our operations.Hone your skills in designing and developing compelling user experiences using native and cross-platform technologies.Expand your technical knowledge of the various security technologies and protocols that YubiKeys supports (e.g, FIDO2 / WebAuthn, FIDO U2F, PIV, etc.).Basic Qualifications:Bachelor or MS in Computer Science or a relevant technical discipline or equivalent experience, including 5+ years of software engineering experience.Familiarity with operating system internals and services, such as synchronization, primitives, efficient file system access, threading and thread safety, and logging facilities.Proven experience of building system software using native and/or memory safe languages such as modern C++, C#, Rust,.Net.Hands-on experience with REST API integrations.Hands-on experience using AI tools such as Claude/Codex/ChatGPT.Thrives in a dynamic fast paced environment where you will be challenged to become better and expected to make a positive impact on Yubico Engineering.Demonstrated ability to learn and apply new technologies.Architecture and design knowledge and experience.Knowledge and/or experience with asymmetric cryptography.Preferred Qualifications:Experience with writing and/or utilizing C/C++ libraries and software.Experience with Postgres SQL.Experience building and interacting with system level services.Comfortable interacting with operating system APIs from application code, such as interacting with serial ports or block devices.Comfortable working with binary serialization protocols and formats.Bonus Skills:Experience developing software to control robotics (e.g., developing an orchestration engine controlling robotic arms).WPF/XAML using the MVVM patternU.S. benefits designed for your overall well-being:Health coverage. We've got you covered with top of the line health plans, including dental and vision. We pay 100% of your premium and 85% for your family.Retirement plan. Our retirement plan includes a 401K dollar per dollar match up to 6% with a cap of $6K/year. Immediate vesting.Wellness reimbursement. We offer $1,200.00 in wellness earnings (prorated based on start date) that you can use on your gym membership, a massage, or your favorite online fitness classes. This is a taxable benefit if you choose to participate.Learning and development. We encourage your professional growth and offer a yearly development stipend of $3,000 and mentorship program.Time off. We offer a total of 15 vacation days plus 10 holidays, and 7 sick days a year.Paid parental leave. We love welcoming new family members to our YubiTeam! All parents receive 8 weeks of paid leave. Birthing parents receive an additional 8 weeks of paid leave (16 weeks total).Commuter Benefits. If you need to commute to the office, we offer commuter benefits.Strong mission & company values. We're a global team on a global mission to make the internet more secure for everyone. We believe that every person's work matters. That you should always be nice, stay humble, and have fun, and never take yourself too seriously.Yubico offers a holistic Total Rewards package designed to support our employees in all aspects of their life inside and outside of work. This role has the annual salary range as defined below for a salary pay range for a candidate located in the San Francisco Bay Area. For roles that are filled in other locations, the compensation range will be based on data provided by the Radford McLagan Compensation Database from Aon. Final compensation is also based on a number of factors including, but not limited to, job-related knowledge, skills, and experience.Salary Pay Range$170,000 - $210,000 USDWe are an equal opportunity employer, we value diversity and uphold an inclusive environment where all people feel that they are equally respected and valued. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity or expression, age, marital status, religion, national origin, disability, protected Veteran status or any other characteristic protected by law. We'd love to learn about what you can add to our diverse team. We are an E-Verify Participating Employer.Yubico does not accept agency resumes or referrals so please do not send them to our careers staff or employees. Yubico is not responsible for any fees related to unsolicited resumes or referrals.Personal data submitted through this form is used for managing Yubico's recruitment activities, which include facilitating any application you make, setting up and conducting interviews and tests for applicants, evaluating and assessing results and selecting candidates, and as otherwise needed in our recruitment and onboarding processes. The use of your personal data may also be necessary prior to entering into a contract with you (that is prior to offering you a job with Yubico). Your personal data will only be used for the purposes for which it was collected and in accordance with Yubico's Privacy Notice. We only keep your personal data for as long as necessary and in compliance with Yubico's record retention policies. If you have asked us to, we will keep you informed of other opportunities at Yubico. We do this in various ways, including email and by phone. If at any time you do not want us to contact you or use your information as described herein please contact us at View email address on click.appcast.io to let us know and we will delete all such information. Providing your personal data is voluntary, but necessary to join our talent community, and if you do not agree to provide your data, we will not be able to consider you as part of our talent community.As part of providing the requested service, we will transfer your data to be processed by Greenhouse Software