Polygon.io · 23 hours ago
Principal Financial Data Ontologist & Taxonomy Architect
United States
Full-time
Hybrid
Lead/StaffPolygon.io is a company focused on providing financial market data, and they are seeking a Principal Financial Data Ontologist to design and govern foundational taxonomies and entity models. This role involves creating coherent systems for representing global financial markets and ensuring semantic clarity in data models and taxonomies.
Developer APIsFinancial ExchangesFinTechStock Exchanges
Responsibilities
Design and maintain a canonical, cross-exchange symbology for global securities, with deterministic rules for identifiers, listings, cross-listings, derivatives families, and lifecycle events
Create academically rigorous classification systems for industries, instrument types, corporate structures, and event categories—formally defined, versioned, citable, and empirically justified
Develop and evolve a unified entity and relationship model spanning issuers, securities, people, organizations, funds, indices, derivatives, and other market participants
Build robust cross-identifier mapping frameworks across major global identifier standards (ISIN, SEDOL, CUSIP, FIGI, RIC, OCC, futures symbology, and exchange-specific codes), including conflict resolution and lineage tracking
Define and govern internal naming standards, metadata conventions, and semantic rules that ensure consistency and clarity across all datasets and data products
Establish principled, formal rules for how data elements relate and correspond, enabling reliable interoperability between diverse datasets and preventing ambiguous or incorrect data assumptions
Prototype classification logic, normalization rules, and validation algorithms using Python or SQL to test correctness, reproducibility, and practical applicability
Evaluate, reconcile, and harmonize incoming datasets from heterogeneous sources using transparent, deterministic, academically defensible methodologies
Produce clear, authoritative documentation describing the definitions, rules, and conceptual models behind the identifiers, taxonomies, and ontologies you design
Partner with product and data teams to integrate your models into internal data systems and customer-facing data products
Qualification
Required
Deep experience with reference data, symbology, taxonomy, or instrument modeling at a market data vendor, exchange, quant fund, or similar organization
Expertise in global identifiers (ISIN, SEDOL, CUSIP, FIGI, RIC, OCC, futures symbology) and how they're assigned, maintained, and resolved
Strong understanding of cross-asset market structure, including equity listings, derivatives contracts, corporate actions, index composition, and exchange rules
Demonstrated ability to design scientifically rigorous, explainable, and consistent classification systems
Comfort writing Python or SQL for prototyping, validation, and data exploration
Exceptional written clarity—able to produce precise, formal definitions and explain complex taxonomy decisions
Preferred
Experience building or contributing to security master models, reference data systems, or entity graphs is a plus
Familiarity with ontology frameworks or graph modeling (OWL, RDF, Neo4j, knowledge graphs) is a plus
Exposure to fundamentals taxonomy (GAAP/IFRS line items) from a metadata or modeling perspective is a plus
Experience designing internal data naming conventions, semantic layers, or entitlement systems is a plus
Academic background related to classification science, information architecture, applied ontology, or library science applied to finance is a plus
Company
Polygon.io
Massive empowers participation in the financial markets by providing fair access to market data through a developer-focused platform.
Founded in 2016
51-200 employees
Funding
Current Stage
Growth StageTotal Funding
$6.35MKey Investors
Headline
2020-09-16Series A· $5.75M
2019-10-02Convertible Note· $0.1M
2019-08-12Convertible Note· $0.5M
Leadership Team
Quinton Pike
Founder
Recent News
Newsfile
2025-11-15
EIN Presswire
2025-11-03
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