Open to opportunities

Matthew Groff

@matthewgroff

Message

Lead software engineer specializing in data engineering, systems modernization, and team leadership.

United States

Message

What I'm looking for

I seek senior engineering roles where I can lead data platform design, modernize systems, mentor teams, and deliver measurable cost and performance improvements.

I am a Lead Software Engineer with deep experience designing data platforms, modernizing legacy systems, and delivering ML-enabled solutions. I have led teams, driven architecture decisions, and implemented cost-saving migrations such as moving Redshift to Snowflake that reduced annual costs by $100,000 while improving report response times.

I build reliable pipelines and services using Go, Python, FastAPI, SQLAlchemy, and Kafka, and I have produced production ML and forecasting solutions in PyTorch and C3.ai. I mentor engineers, act as Scrum Master/Product Owner when needed, and consistently shorten delivery cycles while improving solution quality and performance.

Experience

Work history, roles, and key accomplishments

Current

Senior Data Engineer

Current

Hologram.io

Feb 2024 - Present (1 year 8 months)

Led Redshift-to-Snowflake migration that reduced costs by $100,000/yr and improved report front-end response times up to 75%; rewrote SQL access layers to cut query latency ~20% on average and developed Go libraries and FastAPI services to accelerate data engineering and validation.

Snowflake Redshift)SQL Go fastAPI SQLAlchemy Alembic Kafka Datadog)

Software Engineering Lead

Flint Hills Resources

Jun 2022 - Feb 2024 (1 year 8 months)

Led a team of 6 developers to build data pipelines migrating MSSQL to Neo4j and C3.ai, delivered ML regression models (PyTorch, GluonTS) improving crude availability/demand predictions ~20%, and accelerated ML pipeline delivery from 6 months to under 2 months.

Python PyTorch GluonTS Neo4j MSSQL Kafka JavaScript Team Leadership

Senior Delivery Manager

Optum

Jun 2018 - Jun 2022 (4 years)

Managed multiple engineering teams (up to 18 people) and delivered a $10M application modernization project that doubled business value from $35M to $70M while overseeing resourcing, budgets, and delivery across teams.

Delivery Management Agile Scrum Budgeting Team Leadership Stakeholder Management Azure Kubernetes CI CD

Software Developer

Trinisys

Sep 2017 - Jun 2018 (9 months)

Built data transformation applications in Java, JavaScript, and C# to move and normalize data between sources (CSV, XML, HL7 FHIR, MSSQL, MySQL, MUMPS, MongoDB) and reverse-engineered VA MUMPS data into HL7 for Cerner integration.

Java JavaScript C++HL7 FHIR MUMPS MSSQL MySQL ETL Data Integration

Software Developer III

Johnson Health Tech

Jun 2016 - Aug 2017 (1 year 2 months)

Developed and optimized WPF treadmill control systems using C#, JavaScript, and C++, rebuilt language/login/media libraries to reduce data usage ~300 MB and improve performance up to 90%, and implemented automated testing with AutoIT.

C++WPF JavaScript AutoIt Embedded Systems Performance Optimization

Software Developer

Epic Systems

Apr 2013 - Apr 2016 (3 years)

Maintained and supported healthcare applications using VB6, WinForms, Cache, C#, and JavaScript, built data processing in MUMPS, and trained developers on standards and best practices across multiple Epic modules.

MUMPS C++WinForms JavaScript SQL Crystal Reports Healthcare IT

Software Developer Intern

Marietta NDT

Jul 2012 - Apr 2013 (9 months)

Developed LabView and C# WinForms front-end control systems for ultrasound scanners and created an Android app to remotely control scanners while learning motor control languages and PLC ladder logic.

C++WinForms Android Embedded Systems Motor Control