Sr. Software Engineer - Systems Level

Yubico; Bellevue, Santa Clara (WA, CA); On-site; USD 126,000 - 210,000; Full time

Benefits offered by this job

Health coverage

401K match

Wellness stipend

Development stipend

Paid time off

Parental leave

Commuter benefits

Job summary

Yubico is seeking a Sr. Software Engineer to join the Production and Fulfillment Services team. You’ll design and refine software that controls YubiKey production, enabling operators to leverage production equipment with high reliability.

You’ll gain exposure to security protocols (FIDO2/WebAuthn, FIDO U2F) and work across Product, Production, Hardware, and UX to ship secure, scalable software for our operations.

Qualifications

• Bachelor or MS in Computer Science or a relevant technical discipline or equivalent experience.
• Familiarity with OS internals, threading, logging facilities.
• Experience building system software with native/memory-safe languages (C++, C#, Rust, .NET).
• REST API integrations and AI tool usage (Claude/Codex/ChatGPT).
• Thrives in fast-paced environments and can learn new technologies.

Responsibilities

• Design, refactor, and integrate applications for Windows desktop operators with production equipment.
• Prototype and iterate based on user feedback and industry standards.
• Collaborate across Product, Production, Hardware, and UX to deliver user-friendly software.

Skills

C++

C#

Rust

.NET

REST API

AI tools (Claude/Codex/ChatGPT)

OS internals

Asymmetric cryptography

Architecture & design

Education

Bachelor or MS in Computer Science or related field

Tools

Postgres SQL

WPF/XAML

Serial port APIs

Job description

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, Amazon and 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 Role

Yubico 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 pattern.

U.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.

Salary Pay Range

We have the annual salary range as defined below 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 USD

Equal Opportunity Employer

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.