Sr. Data Engineer

We’re looking for an Identity Data Engineer who is passionate about data quality, intellectually curious about how real-world identities get resolved, and ready to get deep into the details. 

You'll work directly with PII-class data at a low level — examining records, interrogating match logic, and developing a genuine understanding of why our matching engines make the decisions they do. Our matching engines link consumer and household identity signals across diverse data sources, combining deterministic logic with increasingly AI-assisted probabilistic resolution. You'll help enhance these engines — improving match rates, reducing false positives, and extending asset coverage. As our AI-augmented matching capabilities grow, so will this role. There is a real long-term track here for an engineer who wants to go deep on identity. 

What You'll Do 

Identity Data Engineering 

• Design, build, and maintain Snowflake-based pipelines that produce and refresh our core consumer and household identity assets on a regular cadence. 

• Write complex SQL and Python to transform, deduplicate, and enrich identity data at scale — including direct work with PII fields such as names, addresses, emails, and phone numbers. 

• Investigate data anomalies and quality issues at a record level, tracing match decisions back to source signals and surfacing root causes. 

• Build and maintain data models that represent consumer and household identity linkage across multiple input sources. 

Matching Engine Enhancement 

• Partner with senior engineers and data scientists to enhance our AI-assisted matching engine — contributing to feature design, scoring logic, model evaluation, and threshold tuning. 

• Implement and test matching algorithm improvements — both AI-driven and rule-based — and measure their real impact on precision, recall, and overall asset quality. 

• Build evaluation tooling: ground-truth comparisons, match quality dashboards, and regression detection across engine versions. 

• Help drive the evolution of our matching pipeline toward more intelligent, AI-augmented identity resolution, actively using AI tools as part of your day-to-day engineering workflow. 

Collaboration & Delivery 

• Work cross-functionally with Data Science, Product, and downstream engineering teams to translate identity requirements into reliable, scalable solutions. 

• Participate in code reviews and architectural discussions; apply engineering best practices across the full delivery lifecycle — design, implement, test, and deploy via CI/CD. 

• Document data models, pipeline logic, and algorithm decisions clearly for both technical and non-technical audiences. 

• Support QA processes and on-call responsibilities for production identity asset pipelines. 

• Build automated validation frameworks and quality tracking pipelines that continuously monitor asset health — including data completeness, match consistency, and anomaly detection — and surface results through clear, actionable reporting. 

What You Bring 

Required 

• 4+ years of data engineering or software engineering experience, with a focus on data-intensive systems. 

• Strong Python skills — you write clean, well-structured code and are comfortable building data processing logic from scratch. 

• Deep Snowflake fluency: data modeling, complex querying, Streams and Tasks, performance tuning, and preferably Snowpark for Python-native workloads. 

• Strong SQL fundamentals and comfort working with large, messy, real-world datasets — you know how to interrogate data and know when not to trust it. 

• Some experience or genuine curiosity around identity matching, deduplication, record linkage, or data quality at scale. 

• Comfort working with PII-class data responsibly, with awareness of data governance and privacy best practices. 

• Familiarity with version control (Git), Agile delivery, and CI/CD pipelines. 

• Comfort applying AI tools in day-to-day engineering work — including prompt engineering, LLM-assisted data processing, and AI-augmented pipeline logic. 

Nice to Have 

• Hands-on exposure to matching algorithms — deterministic, probabilistic, or ML/AI-based — and experience evaluating or tuning their performance. 

• Experience building agentic workflows and working with MCP servers 

• Some Java experience; comfort with JVM-based tooling is a plus. 

• Familiarity with consumer or household identity signals: name, address, email, phone, and cross-source linkage. 

• Cloud experience, preferably AWS; Azure or GCP welcome. 

• Unix/Bash comfort for scripting and day-to-day environment work. 

Dentsu is committed to providing equal employment opportunities to all applicants and employees. We do this without regard to race, color, national origin, sex , sexual orientation, gender identity, age, pregnancy, childbirth or related medical conditions, ancestry, physical or mental disability, marital status, political affiliation, religious practices and observances, citizenship status, genetic information, veteran status, or any other basis protected under applicable federal, state, or local law. 

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