Staff Software Engineer, FE/Mobile Engineer

QXO • Herndon, VA

1d • $220,000 - $315,000

About The Position

As a Staff Software Engineer on QXO’s eCommerce team, you will lead the design, development, and operation of foundational commerce services. You will own complex systems from ideation through launch and guide their long-term architectural evolution. Working with engineering, product, and design teams, you will build secure, reliable, and extensible services and user interfaces for millions of users across web and mobile platforms. The role suits a highly technical, customer-focused engineer who is comfortable with ambiguity, fast-paced work, and substantial ownership.

Requirements

• At least 5 years of hands-on coding experience.
• At least 3 years building scalable, distributed systems using object-oriented programming languages such as Java, Kotlin, or Go.
• Experience with modern front-end technologies and frameworks such as React, Next.js, or TypeScript.
• Strong knowledge of data structures, algorithms, system design, and concurrency.
• Experience building and developing large-scale, reliable distributed systems.
• Experience designing, launching, and maintaining production systems in a cloud-native environment such as GCP or AWS.
• Experience leading architectural designs and mentoring other engineers.
• Bachelor’s degree in computer science, engineering, or equivalent.
• Strong verbal and written communication skills.

Responsibilities

• Design, build, and operate eCommerce services.
• Design and implement scalable, low-latency systems that meet performance and security requirements.
• Build intuitive and performant user interfaces.
• Contribute to the shared design system and front-end architecture.
• Collaborate with cross-functional teams to develop end-to-end solutions.
• Write clean, efficient, and testable code.
• Contribute to shared libraries and platform components.
• Lead design, architecture, and code reviews.
• Continuously improve operational excellence and system reliability.
• Mentor junior engineers and shape engineering best practices.

Benefits

• Annual performance bonus
• Long-term incentive (equity/stock)
• 401(k) with employer match
• Medical, dental, and vision insurance
• Paid time off and company holidays
• Parental leave
• Paid sick leave
• Paid training and certifications
• Legal assistance and identity protection
• Pet insurance
• Employee assistance program (EAP)

What This Job Offers

• Job Type: Full-time
• Career Level: Senior