Staff Software Engineer, Backend

Job Title QXO is a leading distributor and installer of building products serving an $800 billion market. The company's mission is to modernize the building products industry through advanced technology and a best-in-class customer experience. QXO is North America's largest distributor and installer of insulation, the second-largest distributor of roofing products, the second-largest publicly traded distributor of lumber and building materials, and the largest distributor of waterproofing products. The company is targeting $50 billion in annual revenue within the decade through accretive acquisitions and organic growth. Job Description What you'll do: 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 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. What you'll bring: Qualifications & Skills 5+ years of hands-on coding experience 3+ years building scalable, distributed systems using object-oriented programming languages (Java, Kotlin, Go, etc.) 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 (e.g., GCP, AWS) Experience leading architectural designs and mentoring other engineers Bachelor's degree in computer science, engineering, or equivalent Strong verbal and written communication skills Preferred Qualifications: Experience building commerce, checkout, identity, or personalization services at scale Experience building responsive, accessible, and performant UIs using front-end or mobile frameworks such as React Native Familiarity with AI/ML systems, including model inference pipelines, data labeling infrastructure, or real-time decisioning Experience with experimentation frameworks, recommendation engines, or search platforms Experience working with CI/CD pipelines, observability tools, and performance tuning Experience in Marketing or Ad Tech MS or Ph.D. What you'll earn Base pay range: $138,000 - $235,000 Annual performance bonus Long term incentive (equity/stock) 401(k) with employer match Medical, dental, and vision insurance PTO, company holidays, and parental leave Paid Time Off/Paid Sick Leave: Applicants can expect to accrue 15 days of paid time off during their first year (4.62 hours for every 80 hours worked) and increased accruals after five years of service. Paid training and certifications Legal assistance and identity protection Pet insurance Employee assistance program (EAP) QXO is an Equal Opportunity Employer. We value diversity and do not discriminate on the basis of race, color, religion, gender and sexual orientation, national origin, age, disability, or any other protected status. To comply with Pay Transparency laws, employers must disclose an annual salary range. Actual offers depend on factors such as location, experience, skills, and market data. This position may also offer variable compensation. QXO