Joshua Hollander

Software Engineer, Big Data Wrangler, Stream Whisperer

About

Experienced and dedicated software craftsman, people leader, and mentor.

Designing and building large scale software systems in a number of different fields including Cybersecurity, Location Services and Content Delivery.

Skills

Scala, Java, Python, Rust, Ruby, PHP, Javascript

Spark, Kafka, SOLR, Cassandra, HBase, Elastic Search, Postgres, MySQL

Linux, AWS, Docker, Kubernetes

Microservices, Distributed Systems, ML, DevOps

Experience

2017 Director of Platform Engineering, ProtectWise (acquired by Verizon), Denver, CO

Leading a team of talented engineers to maintain, enhance and scale a revolutionary cloud based cybersecurity product.

• Responsible for hiring, onboarding, mentoring and coaching engineers.
• Responsible for budget planning and cost optimizations.
• Steered major product, architectural and technical decisions.

2013 Principal Engineer, ProtectWise (acquired by Verizon), Denver, CO

Architected, designed and built a large scale data processing pipeline which processes and stores billions of network and security events daily.

• Leveraged Apache Spark with Kafka and S3 for high volume data processing of network packet data, telemetry and statistics.
• Built a custom storage solution leveraging Parquet, S3 and probabilistic data structures to increase query performance and reduce cost over previous solutions.
• Designed and built microservice architecture using REST, Thrift and gRPC

2011 Sr. Software Engineer, Photobucket, Denver, CO

Primarily focused on scalability and performance for one of the largest photo and video sharing sites on the web.

• Took the lead role in helping design the next generation of Photobucket’s web framework and architecture.
• Leveraged HBase to handle the fan-out and querying of millions of user notifications that occur every day.

2002 Additional history from 2002-2010 available on request

Education

2012 MS, University of Colorado at Denver Computer Science

2003 BA, Calvin College Computer Science

Patents

2015 US20150244678 Network traffic filtering and routing for threat analysis

2022 US20220053374A1 Systems and methods for dynamic pseudo-cooperative load balancing by independent nodes based on differentiated attributes and volume

Tech Talks

2018 AWS re:Invent 2018 Data Lake Implementation: Processing & Querying Data in Place

2016 Cassandra Summit 2016 Cold Storage That Isn’t Glacial