# Brian Mackessy

> Software Engineer at Fiddler AI

Location: San Francisco, California, United States
Profile: https://flows.cv/brianmackessy

Distributed Systems Engineer

📍 San Francisco, CA

Hello! I'm Brian Mackessy, a seasoned Backend Software Engineer specializing in building scalable and robust backend systems for big data SaaS products. With over 5 years of experience, my career spans developing cutting-edge solutions in the healthcare and environmental domains. I hold a degree in Computer Science from Gonzaga University.

🔧 Technical Expertise:
 Languages & Frameworks: Java, Scala, Python, React, Jersey
 Databases & Storage: PostgreSQL, Elasticsearch, Cassandra, S3
 Tools & Platforms: Kafka, Kubernetes, Jupyter Notebooks

🌟 At Apixio, I played a pivotal role in developing the chart repository product Nexus from scratch, scaling it to manage approximately 150 million patient charts. My contributions were crucial in devising sharding strategies for Elasticsearch, ensuring optimal performance at scale, and developing a robust indexing layer that handled at peak load 20 million Kafka messages daily.

🎯 I am actively seeking a lead role where I can bring my expertise in distributed systems to design and implement innovative big data solutions from ideation through to production.

📩 Let's connect! Drop me a message here or at brian.mackessy@gmail.com.

## Work Experience
### Software Engineer @ Fiddler AI
Jan 2024 – Present | Palo Alto, California, United States

### Software Engineer (Contract) @ Genentech
Jan 2024 – Jan 2024 | San Francisco, California, United States

### Backend Software Engineer @ Apixio
Jan 2021 – Jan 2024 | San Mateo, California, United States
Built Nexus, a searchable chart repository, using Java, Scala, Kafka, Elasticsearch, MySQL, and Cassandra.

### Backend Software Engineer @ ENFOS
Jan 2018 – Jan 2021 | San Mateo, CA

### Software Developer @ Untapped / dloHaiti
Jan 2018 – Jan 2018 | San Jose, CA
dloHaiti is a sustainable and scalable business that provides clean drinking water in underserved regions of Haiti. ​
Launched in 2013, we currently serve communities with over 300,000 people through 500 sales points served by 9 water treatment & distribution hubs in the west, north, and northeast regions of Haiti.  Production and sales of water are financially sustainable and the distribution and sale of fast-moving consumer goods are growing. 
dloHaiti employs over 100 local staff and helps increase the incomes of over 500 micro-entreprises in the country.

### Software Intern @ Applied Sciences Laboratory | WSU
Jan 2017 – Jan 2018 | Spokane, Washington Area
ASL is customer oriented, focusing on solving problems for industry and government agencies using a multidisciplinary approach that encompasses the physical sciences and engineering. ASL’s primary focus areas include energy, national security, advanced materials, and sensors applications. The scientific underpinnings to address the multidisciplinary challenges involve materials science, chemistry, optical physics, and computational modeling and simulations.

https://asl.wsu.edu/


## Education
### Bachelor's degree in Computer Science
Gonzaga University


## Contact & Social
- LinkedIn: https://linkedin.com/in/brian-mackessy-a81735158

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Source: https://flows.cv/brianmackessy
JSON Resume: https://flows.cv/brianmackessy/resume.json
Last updated: 2026-04-10