Principal Software Engineer, Semantic Data Services

Wex; Boston (MA); On-site; USD 195,000 - 260,000; Full time

Job summary

WEX is transforming into a data-driven enterprise with a modern DaaS platform. As a Principal Staff Software Engineer, you will shape the data stack end-to-end, unifying data acquisition, semantic modeling, and data products to serve analytics, AI, and customer experiences.

You’ll lead across domains, set platform standards, and mentor senior engineers while driving adoption of cloud-native technologies and best practices for reliability and governance.

Qualifications

• 12–15+ years of software/platform engineering experience, building and scaling data platforms.
• Experience with data lifecycle management, versioning, auditability, observability, and lineage.
• Ability to set cross-domain architectural standards and influence multiple teams.
• Strong background in streaming and batch data ecosystems (Kafka, Flink, Spark, DBT).
• Proven leadership, communication, and consensus-building across business stakeholders.

Responsibilities

• Architect the DaaS platform end-to-end, defining ingestion, semantic modeling, metadata, and product delivery.
• Establish platform standards and reusable frameworks for adoption across domains.
• Guide data architecture with senior leaders to align with strategic objectives and scale for billions of records.
• Mentor senior engineers and architects, promoting distributed systems best practices and reliability.
• Drive innovation with open-source and cloud-native technologies (Spark, Iceberg, Kafka, Delta, DBT, Ray).

Skills

Distributed systems

Data acquisition

Semantic modeling

Architectural ownership

Leadership & mentoring

Cross-domain influence

Communication

Tools

Spark

Iceberg

Kafka

Delta

DBT

Airflow

Dagster

Job description

About the Role

WEX is transforming into a data-driven enterprise through its modern Data-as-a-Service (DaaS) platform. At the core of this strategy is a need for world-class technical leadership—engineers who can see across domains, design foundational systems, and set the architectural direction for years to come.

As a Principal Staff Software Engineer, you will play a pivotal role in shaping WEX’s DaaS platform end-to-end. You will drive the unification of data acquisition, semantic modeling, and data products, ensuring they operate together as a coherent, scalable, and trusted foundation for analytics, AI, and customer-facing experiences.

This is not just a technical role—it is a platform architect and multiplier role, where you’ll be responsible for defining cross-cutting patterns, guiding teams across domains, and raising the technical bar across WEX’s data ecosystem. If you’re motivated by solving platform problems at global scale, influencing enterprise direction, and leaving behind systems that endure, this is your role.

What You’ll Do

• Architect the DaaS platform end-to-end: Define the next generation of WEX’s enterprise data stack spanning ingestion, semantic data modeling, metadata, and product delivery.

• Establish platform standards: Set reusable frameworks for ingestion, modeling, lineage, observability, and access control that accelerate adoption across domains.

• Guide technical strategy at scale: Partner with senior engineering, product, and business leaders to align data architecture with WEX’s strategic objectives.
  Solve for scale, reliability, and trust: Design systems that handle billions of records, guarantee semantic consistency, and deliver auditable, governed data assets.
  Mentor and multiply: Coach senior staff engineers and architects, instilling best practices in distributed systems, platform reliability, and semantic clarity.

• Drive innovation: Explore and incorporate modern open-source and cloud-native technologies (e.g., Spark, Iceberg, Kafka, Delta, DBT, Ray, ML-ready data services).

• Be the bridge: Collaborate across Data Acquisition, Semantic Modeling, Data Products, and Governance teams to ensure WEX’s data is trusted, consistent, and usable across every business domain.

What You Bring

• 12–15+ years of experience in software or platform engineering, with a proven track record of building and scaling large-scale data platforms.
  Expertise in distributed systems, data acquisition, and semantic modeling, with architectural ownership of systems processing tens of millions to billions of records per day.

• Demonstrated ability to set cross-domain architectural standards and influence adoption across multiple engineering teams.

• Strong background in data lifecycle management (versioning, auditability, observability, lineage, reproducibility).

• Deep experience with modern data ecosystems: streaming (Kafka, Flink), batch (Spark, DBT), storage (Iceberg, Delta), orchestration (Airflow, Dagster), and APIs.

• Exceptional communication and leadership skills—you can inspire engineers, influence executives, and build consensus across technical and business stakeholders.

• A passion for creating platforms that endure: trusted, consistent, and empowering for analytics, AI, and products enterprise-wide.

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 and professional well-being. Benefits include health, dental and vision insurances, retirement savings plan, paid time off, health savings account, flexible spending accounts, life insurance, disability insurance, tuition reimbursement, and more. For more information, check out the "About Us" section. Pay Range: $195,000.00 - $260,000.00