About the Role/Team
We’re building the semantic backbone of WEX’s Data-as-a-Service (DaaS) platform—an extensible data layer that turns raw data into trusted, reusable, and business-aligned assets.
As a Mid Software Engineer on the Semantic Data team, you will be at the forefront of designing and scaling the data foundation that powers analytics, AI, and operational decisions across all WEX domains. This role will be central to enabling a consistent, governed, and reusable definition of metrics, dimensions, and business logic that can be consumed across tools, platforms, and teams. Your work will be critical in creating a single source of truth, consolidating fragmented data sources into unified, reconciled views.
How you’ll make an impact
Design and implement modular, versioned semantic models and transformation pipelines that serve as reusable building blocks.
Translate complex business definitions into scalable, interpretable, and trustworthy data entities used across analytics, AI/ML, APIs, and operational workflows.
Implement business rules, calculations, and aggregations in the semantic layer.
Build modular, testable, and versioned transformation pipelines with a strong focus on readability, maintainability, and long-term scalability.
Establish data governance principles to ensure consistency and metrics definitions are standardized and compliant.
Define and implement robust data modeling solutions, ensuring data quality, consistency, and interoperability across the organization.
Partner closely with the data products team to understand business requirements and ensure semantic models align with their needs.
Participate in code reviews, design sessions, and incident resolution—promoting high standards for code quality and operational reliability.
Experience you’ll bring
Strong experience as a software engineer, ideally in high-volume or distributed systems environments.
A systems thinking mindset—you consider data as a platform, not a pipeline.
Solid understanding of data quality practices—including validation, enrichment, schema enforcement, and business rule encoding.
Strong programming skills in Python, Java, or another backend language for data services.
Solid grasp of engineering fundamentals, including version control, modular design, testing, and performance tuning.
Proven experience with at least one modern cloud data platform (Snowflake, BigQuery, Databricks).
Experience building highly available, scalable, and secure data platforms that support diverse processing paradigms (e.g., streaming, batch, warehousing, data lakes) is a strong plus.
A collaborative mindset—comfortable working across domains, products, and infrastructure layers.
A strong sense of ownership and accountability—you care deeply about building systems that last.
Top Skills
What We Do
We simplify complex payment systems for fleets, corporate payments, and healthcare—unlocking insights, opportunities, and efficiencies to give you greater control of your business. Powered by the belief that complex payment systems can be made simple, WEX (NYSE: WEX) is a leading financial technology service provider across a wide spectrum of sectors, including fleet, travel and healthcare. WEX operates in more than 10 countries and in more than 20 currencies through approximately 4,900 associates around the world. WEX fleet cards offer approximately 14 million vehicles exceptional payment security and control; our travel and corporate solutions business processes over $35 billion of purchase volume annually; and the WEX Health financial technology platform helps 343,000 employers and more than 28 million consumers better manage healthcare expenses.
