{"id":1652650,"url":"https://alion.io/job/def-con-social-senior-entity-resolution-engineer","title":"Senior Entity Resolution Engineer","company":{"id":43323,"name":"DEF CON Social","domain":"defcon.social","url":"https://alion.io/company/def-con-social","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"senior","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":160000,"max":195000,"currency":"USD","period":"year","gross":null,"usd_annual":195000},"salary_estimate":null,"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":true,"technologies":[{"name":"Python","optional":false},{"name":"SQL","optional":false},{"name":"Master Data Management","optional":true},{"name":"pgvector","optional":true},{"name":"PostgreSQL","optional":true}],"status":"live","first_seen_at":"2026-10-01T13:08:30Z","employer_posted_date":"2026-10-01","last_verified_at":"2026-10-12T04:21:13Z","board_verified":true,"closed_at":null,"days_open":10,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":10},"description":"ABOUT DEFCON AI\nRESILIENCE IN THE FACE OF DISRUPTION. DEFCON AI is an insights company that leverages artificial intelligence, mathematical optimization, data analytics, and software engineering for resilient optimization of complex systems.\nIn today’s dynamically changing world, DEFCON AI’s technology aligns outcomes with operational goals, better decision making, and empowers customers to anticipate assess, and mitigate the impacts of disruptions.\nAbout the Role\nThis role sits in one of the most critical parts of the platform: determining when records from dozens of disparate sources represent the same real-world entity. Graph design and matching strategy are developed in-house, and you’ll be the engineer who turns those concepts into production-ready capability. You’ll shape implementation details, but this is first and foremost a builder role. \nYou’ll join a team building technology that supports real-world government mission needs. The platform ingests and analyzes data from a wide range of sources, applies AI-assisted workflows to surface what matters most, and provides transparent, explainable recommendations that analysts can trust. Every match, merge, and relationship you create helps turn fragmented information into insight. \nYou’ll own the matching build lifecycle end to end: blocking strategies, candidate generation, pairwise scoring, clustering, threshold policy, and the deduplication and known-entity checks that reuse the same engine. You’ll also build the provenance framework that lets every node, edge, and assertion in the graph be traced to the source that asserted it, so matching decisions are auditable and explainable. \nThis is a fully remote role with occasional travel to DEFCON AI headquarters, customer sites, and partner facilities as needed.\nKey Responsibilities \nImplement and refine entity-level record matching: blocking, candidate generation, pairwise scoring, clustering, and threshold policy \nReuse one matching engine for record linkage, deduplication, and known-entity checks \nEstablish provenance so every node and edge traces back to the source that asserted it \nOwn the false-merge versus false-split tradeoff in matching decisions and make it explainable \nOwn 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 \nDocument matching logic in enough detail to serve as an implementation reference for other engineers \nRequired Qualifications \n5+ years of experience, including shipping production record matching or entity resolution \nAbility to explain the matching tradeoffs you made, including how you handled false merges versus false splits \nStrong Python and SQL, with demonstrated experience on large, messy, real-world data \nAbility to explain a matching decision to a stakeholder who must defend it without understanding its internals \nUS Citizenship Required \nActive US Secret clearance required to start \nPreferred Qualifications \nDirect experience applying probabilistic matching to inconsistent identity data such as names, dates, addresses, and identifiers, and familiarity with the failure modes of each \nFamiliarity with probabilistic record-linkage frameworks and tooling such as Fellegi-Sunter models, Splink, Dedupe, Zingg, or an in-house equivalent \nRecord linkage, master data management, or identity management experience \nGraph data modeling and graph algorithms applied in production \nPostgreSQL and pgvector or comparable \nActive Top Secret clearance \nWhat Success Looks Like \nMatching decisions that can be explained and defended to a non-technical reviewer \nA data model and matching pipeline the rest of the team can build on without redesigning it \nProvenance intact end-to-end, so every match traces to its source \nWhat We Offer \nA fully remote, results-based environment \nCompetitive salary, bonus, and equity package \n100% employer paid, comprehensive health insurance including medical, dental, and vision for you and your family \nUnlimited PTO, with your manager’s approval \nFlexible work environment where you manage your work day \n14 weeks of fully-paid parental leave \nSalary Range: $160,000-$195,000. This represents the typical salary range for this position based on experience, skills, and other factors. \nWe’re an Equal Opportunity Employer: You’ll receive consideration for employment without regard to race, sex, color, religion, sexual orientation, gender identity, national origin, protected veteran status, or on the basis of disability. \nApplicant Data Disclosure \nBy submitting an application, you acknowledge that Defcon AI uses third-party service providers to facilitate its recruitment and hiring processes. These providers include applicant tracking systems, candidate verification platforms, and fraud detection tools (collectively, \"Hiring Platforms\"). Your application materials, including your résumé, cover letter, work samples, responses to application questions, and any other information you submit, may be transmitted to and processed by these Hiring Platforms for the following purposes: \nManaging and administering your application throughout the hiring process; \nVerifying the accuracy and authenticity of application materials, including by cross-referencing information you provide against publicly available sources and proprietary databases; \nIdentifying indicators of potentially fraudulent, fabricated, or materially misleading application content, including but not limited to discrepancies between submitted materials and publicly available professional profiles, geographic anomalies, and fabricated work histories. \nApplications that are flagged through this process as containing indicators of fraud or material misrepresentation may be declined from further consideration. If you have questions about the status of your application or the evaluation process, please contact . \nDefcon AI requires its Hiring Platform providers to process your information solely for the purposes described above and in accordance with applicable law. Your information will be retained only for as long as necessary to fulfill these purposes and any applicable legal obligations, after which it will be deleted in accordance with Defcon AI's data retention policies.\nFor more information about how your data is used, please refer to our Privacy Policy and Applicant Privacy Notice.","description_format":"text","description_chars":6492,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":true,"languages":[]},"benefits":["Equity","Flexible schedule","Health insurance","Parental leave","Unlimited PTO"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Information Security"],"lifecycle":[{"event":"open","at":"2026-10-02T00:41:29Z"}],"visa":[],"liveness":{"score":90,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":1,"age_days":10,"expected_fill_days":42,"reasons":["conf:2","velocity","win:early"],"computed_at":"2026-10-12T06:55:09Z"},"pay":{"stated_usd_annual":195000,"is_top_pay":true},"html_url":"https://alion.io/job/def-con-social-senior-entity-resolution-engineer","json_url":"https://alion.io/job/def-con-social-senior-entity-resolution-engineer.json","meta":{"generated_at":"2026-10-12T07:43:35Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":12383,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-13T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":43323},"rest":"https://alion.io/mcp/rest/get_company?id=43323"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdef-con-social-senior-entity-resolution-engineer"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fdef-con-social-senior-entity-resolution-engineer"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fdef-con-social-senior-entity-resolution-engineer"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/def-con-social-senior-entity-resolution-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdef-con-social-senior-entity-resolution-engineer"}]}