DEFCON AI - Senior Entity Resolution Engineer

Remote - USA$160k - $160k+ Equity3w ago

Remote Senior NA Senior Software Engineer SQL Python

Requirements

• 5+ years of experience, including shipping production record matching or entity resolution • Ability to explain the matching tradeoffs you made, including how you handled false merges versus false splits • Strong Python and SQL, with demonstrated experience on large, messy, real-world data • Ability to explain a matching decision to a stakeholder who must defend it without understanding its internals • US Citizenship Required • Active US Secret clearance required to start • Direct experience applying probabilistic matching to inconsistent identity data such as names, dates, addresses, and identifiers, and familiarity with the failure modes of each • Familiarity with probabilistic record-linkage frameworks and tooling such as Fellegi-Sunter models, Splink, Dedupe, Zingg, or an in-house equivalent • Record linkage, master data management, or identity management experience • Graph data modeling and graph algorithms applied in production • Active Top Secret clearance • What Success Looks Like • Matching decisions that can be explained and defended to a non-technical reviewer • A data model and matching pipeline the rest of the team can build on without redesigning it • Provenance intact end-to-end, so every match traces to its source

Responsibilities

• Implement and refine entity-level record matching: blocking, candidate generation, pairwise scoring, clustering, and threshold policy • Reuse one matching engine for record linkage, deduplication, and known-entity checks • Establish provenance so every node and edge traces back to the source that asserted it • Own the false-merge versus false-split tradeoff in matching decisions and make it explainable • Own technical execution of the matching approach against the in-house design: the fixed reference dataset, candidate retrieval and final matching evaluated separately, and threshold recommendations with evidence for review • Document matching logic in enough detail to serve as an implementation reference for other engineers

Benefits

• A fully remote, results-based environment • Competitive salary, bonus, and equity package • 100% employer paid, comprehensive health insurance including medical, dental, and vision for you and your family • Unlimited PTO, with your manager’s approval • Flexible work environment where you manage your work day • 14 weeks of fully-paid parental leave • Salary Range: $160,000—$195,000. This represents the typical salary range for this position based on experience, skills, and other factors.