Lead Data Engineer
Chicago, IL
Category: Engineer
Industry: Technology
Reference ID: JN -062026-107415
Date Posted: 07/11/2026
Shortcut: http://careers.eliassen.com/xi5uwQ
Description:
Hybrid At least 2 days per week in office in Chicago, IL
Our client seeks a Lead Data Engineer to design, build, and optimize large-scale data processing for attribution, measurement, forecasting, and privacy-preserving analytics. The role requires leadership of a major workstream, strong Scala, Spark, SQL, and Python skills, and cloud data platform expertise. The engineer will partner across Product, Data Science, Security, Privacy, and Platform Engineering to deliver secure, scalable, and compliant data solutions.
For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.
Rate: $75.00 to $85.00/hr. w2
Responsibilities:
- Lead design, implementation, and optimization of large-scale data processing using Scala, Spark, SQL, and modern data platforms for attribution.
- Design and operate trusted data pipelines handling advertiser, customer, and measurement datasets across AWS, GCP, Azure, and approved ecosystems.
- Collaborate with Product, Data Science, Security, Privacy, and Platform Engineering to deliver privacy-preserving attribution, measurement, forecasting, and analytics.
- Own scalable batch and streaming workflows using orchestration frameworks and cloud-native services.
- Implement data classification, access controls, and privacy-preserving techniques aligned with security and compliance requirements.
- Drive clean-room and trusted data-sharing environments, exposing only aggregated or privacy-protected outputs.
- Build observability, monitoring, alerting, and operational tooling for reliability, performance, and compliance.
- Troubleshoot complex platform, performance, and pipeline issues across distributed systems.
- Influence technical design, architecture, and best practices in partnership with senior engineering leadership.
- Mentor engineers, lead design and code reviews, and provide technical leadership.
- Ensure all sensitive processing occurs within controlled, auditable boundaries with no unintended egress of PII or proprietary signals.
- Define data handling standards and document trust boundaries, data contracts, lineage, and permitted movement between zones.
- Apply privacy-preserving computation, including aggregation-before-export, pseudonymization, tokenization, differential privacy concepts, and privacy-aware reporting.
- Implement encryption, key management, and secure handling using cloud-native security and governance services.
- Support audits, compliance, governance reviews, and secure data-sharing initiatives.
Experience Requirements:
- 8+ years in Data Engineering with strong Scala and extensive Apache Spark on AWS and/or GCP.
- Strong Python for pipelines, tooling, automation, and infrastructure modules.
- Advanced SQL across relational, cloud warehouses, and lakehouse platforms handling TB-scale datasets.
- Design, build, and maintenance of batch and streaming pipelines.
- Data warehousing, dimensional modeling, data quality, partitioning, and performance optimization.
- Distributed data processing and lakehouse architectures such as Databricks, Delta Lake, or Apache Spark.
- Operating distributed data platforms at scale with orchestration tools like Airflow, Databricks Workflows, or AWS Step Functions.
- Git-based workflows and automated testing frameworks.
- Cloud-native development on AWS and/or GCP with CI/CD, code reviews, observability, and production support.
- Proven technical leadership, mentorship, and delivery within tight timelines.
- Trusted environment execution: clean rooms or secure data-sharing platforms, handling PII and regulated data, fine-grained access controls, governance policies, and policy enforcement.
- Familiarity with tokenization, pseudonymization, aggregation-before-export, and differential privacy concepts.
- Experience with measurement, attribution, audience analytics, or privacy-preserving reporting solutions.
- Data lineage and governance tooling such as Unity Catalog, AWS Glue Data Catalog, Apache Atlas, or OpenLineage.
- Understanding of trust boundaries, secure data-sharing patterns, and zero-trust data architecture.
- Experience documenting data contracts, flows, lineage, and permitted data movement between zones and domains.
- Encryption, key management, and secure handling of sensitive data with cloud-native security services.
- Design of observability and alerting to detect anomalous movement, policy violations, and potential leakage.
- Experience in environments where only aggregated, anonymized, tokenized, or privacy-protected outputs may leave trusted boundaries.
- Strong written and verbal English communication and experience in Agile/SCRUM.
- Good to have: Databricks, AWS Clean Rooms or PETs, advertising and retail media platforms, collaboration with Security/Privacy/Risk/Compliance, ELK/Grafana/OpenTelemetry, Docker/Kubernetes, and secure design reviews.
Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:
· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.
If you have any indication of fraudulent activity, please contact fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contact fraud@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
- When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
- Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group, as indicated above