Simon Cullen | Data Engineering & Cloud Architecture

Simon Cullen - Principal Data Engineer

Principal Data Engineer with over 10 years of expertise in designing, building, and maintaining large-scale data platforms.

Currently leading data engineering initiatives at OptumRx (UnitedHealth Group), ensuring 24/7 uptime of mission-critical pricing systems and implementing cutting-edge data management practices.

Linux

System Administration & Scripting

Networking

VPNs, VLANs, DHCP & Infrastructure

SQL

Database Design & Optimization

Python

Data Engineering & Automation

Databricks

Analytics & Machine Learning

Ansible

Configuration Management

Docker

Containerization & Orchestration

Podman

Container Management

Azure

Cloud Architecture & Services

Professional Experience

Principal Data Engineer - Pricing and Underwriting

OptumRx @ UnitedHealth Group

May 2023 - Present

  • Architecting and maintaining high-availability data platforms processing billions of dollars in client bids annually
  • Leading incident response for mission-critical pricing systems, ensuring 24/7/365 uptime and minimal disruption
  • Implementing advanced data governance frameworks that enhance transparency and traceability
  • Developing next-generation data pipelines using Azure Data Factory and Databricks
  • Spearheading migration from legacy systems to modern cloud-native architectures

Senior Data Analyst - Compliance

Kraken Digital Asset Exchange

2023 - 2024

  • Designed and implemented automated compliance reporting dashboards for regional regulatory requirements
  • Engineered data pipelines processing terabytes of cryptocurrency transaction data
  • Served as lead data specialist for high-sensitivity legal cases, audits, and regulatory compliance
  • Developed AI-assisted anomaly detection systems to identify suspicious transaction patterns

Business Intelligence Developer

Susquehanna International Group

2017 - 2022

  • Architected high-volume ETL pipelines supporting critical trading operations and regulatory compliance
  • Developed real-time ETF basket composition processing system that revolutionized pricing accuracy
  • Created advanced trading anomaly detection systems that prevented millions in potential losses
  • Led multiple infrastructure modernization initiatives, including cloud migration strategies

Golang Rest API using Gin & Valkey backend

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Portfolio

Certifications & Education

Azure DP-900

Microsoft Certified: Azure Data Fundamentals

Databricks Lakehouse Fundamentals

Certified Data Lakehouse Professional

Chainalysis Reactor

Blockchain Fraud Analysis

ITIL V3 Foundation

IT Service Management

Teradata Certified Professional

Database Administration

Graduate Diploma in IT

Dublin City University

M.Sc International Business

Dublin Institute of Technology

B.Sc Business Studies

Dublin Institute of Technology

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