Samuel William Salefske

Senior Data Architect & Lead Data Engineer

Paw Paw, MI · Remote (269) 547-0573 Salefske21@gmail.com

Senior Data Architect and Lead Data Engineer with 10+ years of experience designing enterprise data models, governing metadata and lineage, and delivering scalable, cloud-native data platforms in AWS and hybrid environments. Deep expertise in ETL/ELT pipeline design, data quality frameworks, and cross-system data integration — with a track record of leading architecture review boards, mentoring engineering teams, and translating ambiguous business requirements into long-term, interoperable data solutions.

Capillary Technologies Remote

Joined via Mastercard's divestiture of SessionM to Capillary Technologies, May 2026

Lead Data Engineer May 2026 – Present
  • Architect conceptual and physical data models for transaction processing domains, supporting star-schema reporting layers and normalized operational stores handling millions of records daily.
  • Lead cross-functional engineering initiatives across transaction data platforms.
  • Serve on architecture review board evaluating new technical solutions and enforcing platform standards for data modeling and governance.
  • Lead client workshops and design sessions to formulate Business Requirements Docs and Testing Plans.
  • Mentor junior developers through weekly 1:1s and lunch-and-learns for onboarding engineers.
SessionM / Mastercard Remote

SessionM acquired by Mastercard; core platform and team remained continuous through Capillary divestiture

Lead Data Engineer Mar 2026 – May 2026
  • Architect conceptual and physical data models for transaction processing domains, supporting star-schema reporting layers and normalized operational stores.
  • Serve on architecture review board; lead client workshops and design sessions.
  • Mentor junior developers through 1:1 sessions and onboarding lunch-and-learns.
Senior Data Engineer Sept 2023 – Mar 2026
  • Guided engineering teams on secure coding standards and vulnerability remediation strategy.
  • Designed, architected, and maintained API-based integrations across internal and external systems using Python, SQL, and Java.
Data Engineer Aug 2021 – Sept 2023
  • Built and maintained API-based integrations across internal and external systems using Python, SQL, and Java.
  • Implemented cloud-native solutions in AWS to improve scalability and reliability.
Deloitte Remote
Senior Consultant Oct 2019 – Aug 2021
  • Designed and implemented enterprise Third-Party Risk Management systems.
  • Built executive-level dashboards aggregating enterprise-wide risk metrics.
  • Developed governance frameworks across multiple domains to reduce development and production issues.
  • Led client workshops, requirements gathering sessions, and end-user training.
U.S. Bank Remote
Information Security Specialist Mar 2019 – Oct 2019
Application Developer Feb 2018 – Mar 2019
  • Rebuilt enterprise Risk Management module integrating internal software catalog and evidence repositories.
  • Developed modular approval and commenting applications to streamline workflows.
  • Built Windows listener services integrating APIs with internal systems for automated risk rating.
  • Led system upgrades and platform scaling initiatives.
Lokion Interactive Memphis, TN
Developer Sept 2015 – Feb 2018
Associate Developer May 2014 – Sept 2015
  • Developed custom C#/.NET integrations between Archer and external systems.
  • Designed event-driven workflows and automated data feed integrations.
  • Led technical sales discussions and requirements gathering sessions.

Languages

Python, SQL, Java, C#, REST APIs, XML, JSON

Data Modeling & Governance

ER Modeling, 3NF, Normalized & Denormalized Design, Star/Snowflake Schemas

Cloud Platforms & Storage

AWS (S3, Glue, Redshift), AWS Glue Data Catalog, Snowflake, Databricks / Delta Lake

Data Integration & Quality

ETL/ELT Pipeline Design, Batch & Streaming Pipelines, Data Quality Frameworks, Cross-System API Integration

DevSecOps & Tooling

CI/CD (Jenkins / GitHub Actions), Git, JIRA, Splunk

Bachelor of Science — Security & Information Assurance (Biometric Security)

Davenport University

Associate of Applied Science — Security & Information Assurance

Davenport University

AWS Certified Cloud Practitioner