Aaron Silverman, Developer in Berkeley, CA, United States
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Aaron Silverman

Verified Expert  in Engineering

AWS Developer

Berkeley, CA, United States
Toptal Member Since
February 7, 2022

Aaron is a team player who will throw himself at an interesting problem and not give up until it is solved. He is a quick read and can learn new technologies and workflows extremely fast. Aaron holds a Bachelor's degree in mathematics, is conversationally fluent in German, and speaks and reads Japanese at an intermediate level.


Oncall Health Corporation DBA Cayaba Care
Django, Python 3, React, Full-stack, PostgreSQL, JavaScript, Aptible...
Ruby, Ruby on Rails (RoR), GraphQL, CSS, HTML5, Amazon Web Services (AWS)...
Ruby on Rails (RoR), PostgreSQL, Amazon Web Services (AWS), CSS, HTML5...




Preferred Environment


The most amazing...

...thing I've developed was a ground truth system capable of handling over 1,000,000 data points per month and employed 187 contractors.

Work Experience

Full-stack Developer

2022 - 2023
Oncall Health Corporation DBA Cayaba Care
  • Built innovative manual ingest, saving contractual fees of $5,000 for a client that would have been levied for a fully automated solution. The operator had to drop files in a folder on the desktop, and all the processing would proceed automatically.
  • Facilitated extensive codebase improvement for both the React app and the data pipeline.
  • Created HIPAA-compliant automated email ingest for data emailed to clients as Excel spreadsheets or CSVs, data sync job reducing significant overhead for team marking appointments complete.
Technologies: Django, Python 3, React, Full-stack, PostgreSQL, JavaScript, Aptible, Amazon Web Services (AWS), Healthcare, HIPAA Compliance, Bash Script, AWS DevOps

Senior Software Engineer

2022 - 2022
  • Developed two microservices in ROR GraphQL as a senior team member.
  • Developed an eCommerce service that managed checkout and cart services using a commercetools API.
  • Developed a pricing microservice to automate quote creation for customers.
Technologies: Ruby, Ruby on Rails (RoR), GraphQL, CSS, HTML5, Amazon Web Services (AWS), AWS DevOps

Senior Software Engineer

2020 - 2021
  • Worked on the payments team, focusing on internationalization, tax collection, anti-fraud, and promotions.
  • Orchestrated tax processing for all spin products in-app.
  • Created an anti-fraud system to catch users with multiple accounts.
Technologies: Ruby on Rails (RoR), PostgreSQL, Amazon Web Services (AWS), CSS, HTML5, AWS DevOps

Senior Software Engineer

2017 - 2019
Cape Analytics, Inc.
  • Developed a ground truth system with 197 contractors that could label 1,000,000 points per month.
  • Led platform developers to calculate the fire risk for any property in the US from satellite imagery.
  • Managed platform developers for a customer portal, the company's main graphical interface for their product.
Technologies: Python 3, Tornado, Django, Ruby on Rails (RoR), PostgreSQL, HTML5, CSS, Amazon Web Services (AWS), AWS DevOps, Data Engineering

Data Engineer

2013 - 2016
  • Worked on the iPhone 5 screen repair process, apple's first in-store device repair.
  • Collaborated on the effort to modernize company warranty forecast system.
  • Contributed as a member of the AppleCare World Wide Business Intelligence team, handling all data from Apple service providers and Apple retail stores.
Technologies: Teradata, Python, PHP, SQL, Bash Script, Java, Data Engineering

Automated Ground Truth System for Cape Analytics

Along with a team of four, I created a ground truth system on a tight schedule that integrated with an online freelance company and, at its peak, employed 187 contractors and processed 25 million data points over the course of a year. The system was entirely responsible for managing payment and the web portal for workers. Output was used as training data for classifier CNNs.
2004 - 2008

Bachelor's Degree in Mathematics

Kalamazoo College - Kalamazoo, Michigan


React, Pandas




Ruby on Rails (RoR), Django


PostgreSQL, Teradata


Python 3, JavaScript, HTML5, CSS, Python, Bash Script, Java, C, PHP, SQL, Ruby, GraphQL


ETL, REST, HIPAA Compliance

Industry Expertise



Amazon Web Services (AWS), Aptible


Data Engineering, AWS DevOps, Tornado, Full-stack, Data Visualization

Collaboration That Works

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