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# Staff Software Engineer, Fullstack

- **Company:** QXO Inc
- **Location:** Seattle, WA, United States
- **Experience:** Experienced
- **Salary:** $160,000.0 - $288,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Amazon Web Services, Code Review, Continuous Integration, Data Structures, Data Warehousing, Distributed Systems, Python (Programming Language), Machine Learning, Object-Oriented Software Development, Performance Tuning, Standard Sql, Next.js, Search Technologies, Software Engineering, Data Streaming, Systems Integration, TypeScript, Management of Software Versions, Datadog, Enterprise Software Applications, ReactJS, Large Language Models, Concurrency, Reliability of Systems, AI Coding Agents, Kotlin, Containerization, Information Technology, Front End Software Development, Model Inference, Data Pipelines, Golang
- **Published:** November 7, 2026
- **Apply:** https://dejobs.org/x/x/893FDFE1E640457EA97DC919347F72CD/job/

## About the Role

* 8+ years of hands-on software engineering experience
 * 3+ years building scalable, distributed systems using object-oriented programming languages (Java, Python, 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 designing, launching, and operating production systems in a cloud-native environment (GCP, AWS)
 * Strong SQL and data modeling skills, with experience building batch and streaming data pipelines
 * Experience leading architectural designs and mentoring other engineers
 * Experience integrating with enterprise systems such as ERP, CRM, or order management platforms
 * Bachelor's degree in computer science, engineering, or equivalent
 * Strong verbal and written communication skills, including the ability to explain technical tradeoffs to business stakeholders

Nice to Have

 * Experience building pricing, CPQ, revenue management, or quote-to-cash systems
 * Familiarity with B2B distribution pricing and costing concepts: price waterfalls, contract and matrix pricing, vendor rebates, landed cost, and cost-plus versus market-based pricing
 * Experience building product similarity, recommendation, or catalog intelligence systems, including embeddings, vector search, or market basket analysis
 * Experience building production applications on large language models, including retrieval, tool use, agent workflows, and evaluation
 * Experience deploying statistical or ML models to production, including feature pipelines, model inference, and model monitoring
 * Experience with experimentation frameworks or causal measurement of pricing changes
 * Experience building systems subject to SOX or financial audit controls
 * Experience with CI/CD pipelines, observability tooling, and performance tuning
 * MS or Ph.D. in computer science, economics, operations research, or a quantitative field

## Description

* Design, build, and operate the core pricing engine and low-latency price-serving APIs used by CPQ, eCommerce, and ERP point-of-sale systems
 * Build and extend CPQ capabilities, including quote configuration, AI-assisted deal guidance for sellers, approval workflows, and order management integration
 * Build costing systems that produce accurate product and order-line costs, including landed cost and vendor rebates, so margin is measured correctly at the transaction level
 * Build product relationship services that use embeddings and LLM-based product attribute extraction to identify complementary and substitute items for cross-sell, recommendations, and relational price consistency
 * Productionize pricing science and AI models (segmentation, market price, margin, elasticity, and LLM-based agents), including model serving, evaluation, versioning, and monitoring
 * Build data pipelines that integrate transaction, cost, rebate, product, and competitive data from ERP and data warehouse sources
 * Build pricing controls into the platform, including price change audit trails, change management, and guardrails on AI-generated recommendations that meet SOX and IT general control requirements
 * Lead migration from the incumbent pricing engine, including parallel-run validation, reconciliation, and cutover
 * Lead design, architecture, and code reviews, and drive operational excellence and system reliability
 * Mentor engineers and shape engineering practices across the team, including effective use of AI coding tools