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Firmware Engineer at Yubico Inc. · Katori

Meet Yubico

Yubico 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.

Yubico is seeking the next new team member for our Firmware team. We're looking for someone with a passion for security to join us in our work to develop new features for our products. Your role will be to implement established cryptographic protocols, as well as to take part in creating the protocols of tomorrow. As part of our team you'll be working on our core products and the tools and libraries which make them useful. Use your passion, insights, and technical skills to help us create a trusted Internet.

Tasks & Responsibilities:

Develop, design and test new features for the firmware of Yubico's products, such as the YubiKey and the YubiHSM.
Write libraries and utilities to expose new features to higher level applications.
Develop integrations with existing systems to enable them to take advantage of our products.

Skills & Experience:

Experience with cryptography and security (such as smart cards, PKCS#11, common encryption schemes and cryptographic libraries)
3+ years experience with writing software for microprocessors with constrained resources
High proficiency in C
Familiarity with Linux, git (ideally CLI) and Python or similar high-level languages
Ability to work independently as well as in a team, capable of taking own initiatives but also listening to others
Experience with integrating/building open source software and the open source community

_#LI-BR1

We 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 the Yubico 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 jobs@yubico.com 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 Inc., a service provider contracted by Yubico AB and/or its subsidiaries that meets legally mandated privacy requirements. The Yubico Privacy Notice offers more information about Yubico privacy practices, including the lawful basis for processing of personal data, how to lodge a complaint with the supervisory authority, and how to contact Yubico to exercise your data subject rights. In this notice, when we refer to "Yubico", "us", "we" or "our", we mean the Yubico group company or companies that you apply to, or correspond with, and which are responsible for any personal data collected about you.

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Meet Yubico

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