Henry Tadeusiak

Senior Software Engineer, Tesla

Austin, TXJun 2021 - Present

Owner of Tesla's payment user interface built in React with a Node.js (Express) backend. Responsible for the daily experience of 1.5+ million customers across 19 integrated Tesla teams and in 73 different countries.
Implemented a two-tier CDN architecture with regional edge caches and a centralized mid-tier cache to optimize delivery of JavaScript, CSS, and HTML assets. Reduced P90 request durations by 86.9% (JavaScript/CSS) and 49.9% (HTML). Decreased server CPU utilization by 72.7%.
Created a high-performance logging service in Rust to replace a legacy system with high latency and limited throughput. Increased throughput from 100k to 400k req/min and reduced P99 latency from 5033ms to 384ms at peak load.
Designed and implemented a rate calculation engine for Tesla Insurance in C#/.NET. Developed an algorithm that identifies and prevents miscalculations. Resulted in 100% premium accuracy for over 6.5+ million customer quotes since inception.
Developed a standardized authentication and authorization framework for JavaScript-based projects, improving onboarding experience, reducing development time, and enhancing security.
Conducted a thorough analysis to identify and implement the most effective testing strategies, resulting in a reduction of false positives, implementation time, and defects.

Austin, TXMay 2024

Assisted with scrutineering the Pirelli GT4 and GR Cup classes, managing parc fermé, and contributing to event setup and teardown at the Fanatec GT World Challenge race series.
Gained hands-on exposure to technical inspection procedures and motorsport operations, building a deeper understanding of vehicle regulations and race management.

San Francisco, CAJun 2020 - Sep 2020

Developed and implemented an Angular-based web application to streamline provider onboarding for Amazon's Anchor team, reducing onboarding time and improving overall efficiency.
Refactored the existing provider implementation by creating new models, DAO interfaces, and tables, enhancing internal telemetry, and providing valuable insights into provider status and information changes.
Received the “Best In Show” award at the Alexa Devices Townhall, recognizing outstanding contributions and technical achievements. First intern to receive the award.

Seattle, WAJan 2020 - Mar 2020

Developed and launched an internal application to automate the decision-making process for customer lease applications, processing ~250 customer applications daily.
Collaborated with the web designer and project manager to build the front end of the application from scratch, integrating with other Tesla applications for hosting and SSO authorization.
Designed and implemented REST APIs to process applicant rejection reasons, using POJOs to query a MySQL database and ensuring backend validation aligns with business logic.
Utilized Jest and Enzyme for unit testing to ensure expected code behavior and maintain application quality.

Seattle, WADec 2018 - Sep 2019

Project Sidewalk is a research lab at the University of Washington that crowdsources sidewalk accessibility data to improve understanding of urban accessibility.
Improved walkthrough that teaches new users how to label streets accurately by eliminating server downtime from calls to missing images in the Google Maps database by loading locally stored panoramas. Extensive use of JavaScript and Google Maps API is required.
Developed and deployed a mobile phone validation interface using JavaScript, Scala, and PostgreSQL to train machine learning models to detect accessibility problems on sidewalks. This new interface now accounts for 45% of all collected label validations.