Senior Mobile Software Engineer: Build Scalable, Fast UI

QXO; Seattle (WA); On-site; USD 138,000 - 235,000; Full time

Benefits offered by this job

Bonus (Annual performance)

Equity / Long term incentive

401(k) with employer match

Medical, dental, and vision insurance

PTO and holidays

Paid time off and sick leave

Training and certifications

Legal assistance

Pet insurance

EAP

Job summary

QXO is seeking a Senior Software Engineer to design, build, and maintain the core services and user experiences powering our commerce platform. You will collaborate with product, design, and other engineering teams to deliver secure, reliable, and scalable solutions for millions of users across web and mobile.

Ideal candidates have 2–5 years of software engineering experience, proficiency in Java, Kotlin, or Go, and familiarity with React/Next.js/TypeScript, cloud platforms (AWS or GCP), and

Qualifications

• 2–5 years of professional software engineering experience.
• Experience building eCommerce services and cloud production systems is a plus.
• Solid understanding of data structures, algorithms and software design principles.

Responsibilities

• Design, develop, and maintain eCommerce services and user interfaces.
• Implement scalable, low-latency systems that meet performance and security goals.
• Build intuitive and performant front-end experiences.
• Collaborate with cross-functional teams to deliver end-to-end product features.
• Write clean, efficient, and testable code.
• Participate in design and code reviews.
• Support the continuous improvement of system reliability and operational excellence.
• Contribute to shared libraries, platform components, and design systems.

Skills

Java

Kotlin

Go

React

Next.js

TypeScript

DSA fundamentals

AWS

GCP

CI/CD

Communication

Education

Bachelor's degree in CS/Engineering

Tools

TypeScript

Next.js

React

CI/CD pipelines

Observability tools

Job description

QXO is seeking a Senior Software Engineer to design, build, and maintain the core services and user experiences powering our commerce platform. You will collaborate with product, design, and other engineering teams to deliver secure, reliable, and scalable solutions for millions of users across web and mobile.

Ideal candidates have 2–5 years of software engineering experience, proficiency in Java, Kotlin, or Go, and familiarity with React/Next.js/TypeScript, cloud platforms (AWS or GCP), and