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About the Role

WEX is modernizing its enterprise data platform to make data understandable to people, applications, AI models, and autonomous agents. We are seeking a Principal Software Engineer to help build the next generation of our Data-as-a-Service (DaaS) platform and establish the semantic foundation connecting enterprise data with its business meaning. This role involves defining and building trusted semantic objects for major business domains, integrating data, relationships, definitions, and context into reusable assets for analytics, data products, decisioning, and AI experiences. You will act as a senior technical leader and hands-on engineer, collaborating with various teams to solve complex data and distributed systems challenges in an evolving, AI-native landscape.

Responsibilities

Define and influence the architecture and technical direction for WEX's Semantic Data Lake and next generation of Data as a Service.
Design and build semantic business objects that bring together enterprise data, business context, relationships, metrics, derived attributes, rules, lineage, quality, and governance.
Develop scalable patterns and frameworks for creating semantic objects across multiple lines of business while maintaining consistent enterprise standards.
Build core platform capabilities across semantic modeling, ontology, metadata, knowledge graphs, data quality, lineage, data contracts, and governance.
Work deeply with business and product teams to translate complex business concepts into durable technical models and reusable platform capabilities.
Help capture business context that may exist across databases, applications, workflows, documents, policies, and institutional knowledge.
Enable AI and agentic applications to discover, understand, reason over, and safely act on trusted enterprise data.
Design reusable APIs, services, frameworks, and developer experiences that allow teams to build data products and AI experiences faster.
Solve complex distributed systems, data processing, scalability, reliability, and performance challenges.
Establish engineering patterns and architectural standards and influence adoption across teams without relying on direct authority.
Mentor engineers and provide technical guidance on complex architecture and implementation decisions.
Remain hands-on with architecture, design, prototyping, code, and critical platform components.

Requirements

10+ years of experience in software engineering, data engineering, distributed systems, data platforms, or related technology areas, with demonstrated experience operating at Staff, Principal, or equivalent technical scope.
Deep software engineering and distributed systems expertise, with experience designing and building large-scale production platforms.
Deep understanding of modern data architecture, including large-scale data processing, streaming, lakehouse architectures, data products, and distributed systems.
Deep understanding of semantic data technologies and industry direction is essential.
Direct experience building a semantic data layer is strongly recommended.
Experience with semantic modeling, ontology, metadata platforms, knowledge graphs, data catalogs, enterprise data modeling, or closely related technologies.
Demonstrated ability to translate complex business concepts into scalable technical abstractions and reusable platform capabilities.
Strong understanding of data quality, governance, lineage, security, privacy, and operational reliability.
Experience building platforms or capabilities adopted by multiple engineering teams, business domains, or product organizations.
Strong architectural judgment and the ability to reason through complex tradeoffs while moving comfortably between architecture and detailed implementation.
Demonstrated ability to influence technical direction and drive alignment across teams and organizational boundaries.
Strong communication skills with the ability to explain complex technical concepts to engineers, product teams, business partners, and senior leaders.
Experience building platforms that support AI/ML, generative AI, RAG, or agentic applications.
Experience with knowledge representation, semantic search, context engineering, graph technologies, or AI-ready enterprise data.
Experience modernizing large enterprise data ecosystems with multiple business domains and legacy systems.
Experience with technologies such as Spark, Flink, Kafka, Iceberg, Snowflake, Databricks, cloud-native data services, graph databases, or equivalent large-scale data technologies.
Experience defining reusable frameworks, APIs, standards, or platform capabilities that have been broadly adopted beyond an individual team.

Skills

Software engineering
Data engineering
Distributed systems
Data platforms
Semantic data technologies
Semantic modeling
Ontology
Metadata platforms
Knowledge graphs
Data catalogs
Enterprise data modeling
Data quality
Data governance
Data lineage
Data security
Data privacy
Operational reliability
AI/ML
Generative AI
RAG
Agentic applications
Knowledge representation
Semantic search
Context engineering
Graph technologies
AI-ready enterprise data
Spark
Flink
Kafka
Iceberg
Snowflake
Databricks
Cloud-native data services
Graph databases

Experience Level

Principal
Staff

Salary/Compensations

$200,600.00 - $250,400.00

Benefits

Health, dental and vision insurances
Retirement savings plan
Paid time off
Health savings account
Flexible spending accounts
Life insurance
Disability insurance
Tuition reimbursement

About the Company

WEX is reimagining its enterprise data platform with an ambitious goal: make our data understandable not only to people and applications, but also to AI models and autonomous agents.