Senior Software Engineer | Semantic Data Modeling

WEX INC • Seattle, WA • 1d ago

This is a remote position; however, the candidate must reside within 30 miles of one of the following locations: Portland, ME; Boston, MA; Chicago, IL; Dallas, TX; San Francisco Bay Area, CA; and Seattle/WA.
About the Team/Role
WEX is reimagining its enterprise data platform with a powerful goal: transforming raw data into semantically meaningful, reusable, and trusted business assets. As a Senior Software Engineer on the Semantic Data Modeling Team, you'll play a critical role in designing, building, and maintaining our core 360 data objects-such as Customer360, Fleet360, and Provider360.
These wide, entity-based tables are foundational to our analytics, AI, and product platforms. You'll implement rich transformation logic, encode business rules, and ensure data consistency across domains-making our data models both technically scalable and business-ready.
This team is at the heart of WEX's DaaS platform-bridging raw data with meaningful business insights. You'll help define and deliver the semantic backbone of our products, analytics, and machine learning systems.
If you're excited about building data models that carry real-world meaning, scale to billions of records, and unify how a business understands its world-this is your next big move.
How you'll make an impact
Design and implement semantically consistent, scalable 360 data models that integrate data across domains.
Build and maintain transformation pipelines that apply cleansing, standardization, enrichment, and derived logic to domain datasets.
Write production-quality, testable code in SQL and Python (or equivalent)-delivering performant and maintainable data assets.
Work closely with domain experts, data scientists, and product stakeholders to translate business concepts into interpretable, decision-ready data models.
Implement logic for classifications, KPIs, scoring algorithms, and business rules, ensuring traceability and data lineage.
Help define and enforce standards for data modeling, documentation, and governance within the semantic layer.
Collaborate across teams to integrate with ingestion, MDM, and data product layers.
Experience you'll bring
4+ years of experience in data engineering or software engineering with a focus on data transformation, modeling, or analytics platforms.
Strong proficiency in SQL and at least one general-purpose language such as Python or Scala.
Experience building and scaling wide, entity-based tables and modeling domain concepts (e.g., customer, fleet, provider) into durable data objects.
Solid understanding of data quality practices-including validation, enrichment, schema enforcement, and business rule encoding.
Experience working with large-scale datasets and optimizing transformation pipelines for performance and maintainability.
Comfort operating in a collaborative, cross-functional environment, balancing business logic with platform scalability.
A mindset for traceability, reproducibility, and semantic clarity-you build data models others can trust and reuse.
Bachelor's degree in Computer Science, Software Engineering, or related field; A Master's or PhD in the areas of Data Science, Machine Learning, Artificial Intelligence, Computer Science, or Statistics, it will be a big plus.
The base pay range represents the anticipated low and high end of the pay range for this position. Actual pay rates will vary and will be based on various factors, such as your qualifications, skills, competencies, and proficiency for the role. Base pay is one component of WEX's total compensation package. Most sales positions are eligible for commission under the terms of an applicable plan. Non-sales roles are typically eligible for a quarterly or annual bonus based on their role and applicable plan. WEX's comprehensive and market competitive benefits are designed to support your personal an

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