Alex Kroeger
Emergency Medical Technician at LIFEwest Ambulance Services
San Francisco Bay Area United States
Summary
🤩
Rockstar🎓
Top SchoolAlex Kroeger is a versatile software engineer and data scientist with a decade of experience building backend systems, smart contracts, and production data tooling across leading crypto firms in the San Francisco Bay Area. He has shipped staking and rewards-related APIs and implemented a notable Cream Bridge smart contract within the widely used 0x protocol monorepo, demonstrating depth in on-chain integrations and DeFi liquidity engineering. His background spans roles at Coinbase, 0x Labs, Phantom, and Circle, where he coupled data-driven insights with production software delivery. Unusually for a senior engineer, he currently balances that technical career with front-line emergency medical technician work, reflecting strong composure under pressure and a pragmatic, service-oriented mindset. Alex holds a B.B.A. in Finance and Economics from Notre Dame, bringing quantitative rigor to protocol design and backend architecture. He is an active contributor to open-source DeFi tooling, focused on reliable, auditable solutions for decentralized liquidity and rewards systems.
10 years of coding experience
8 years of employment as a software developer
Bachelor of Business Administration (B.B.A.) Finance Economics, Bachelor of Business Administration (B.B.A.) Finance Economics at University of Notre Dame
Github Skills (16)
exchange10
hex10
smart-contracts10
erc2010
solidity10
load-balancer10
postgresql10
api10
sql10
back-end-development10
ethereum10
apidoc10
typescript-types9
typescript9
typescripts9
Programming languages (6)
Github contributions (5)
0xProject/0x-api
Dec 2019 - Jul 2021
An HTTP Interface to 0x liquidity and tooling
Role in this project:
Back-end Developer
Back-end DeveloperContributions:240 reviews, 73 commits, 114 PRs in 1 year 7 months
Contributions summary:Alex primarily worked on the back-end components of the API, focusing on staking-related functionalities. Their contributions involved modifying and adding new queries related to staking pools, epochs, and rewards. They updated the API's data service and types to incorporate these new queries and provide support for displaying epoch reward timestamps. Furthermore, the user addressed linting issues and formatting problems within the code.
ethereumliquiditytooling
0xProject/0x-monorepo
Jan 2020 - Oct 2020
0x protocol monorepo - includes our smart contracts and many developer tools
Role in this project:Back-end Developer & Smart Contract Engineer
Back-end Developer & Smart Contract EngineerContributions:5 reviews, 25 commits, 7 PRs in 9 months
Contributions summary:Alex contributed significantly to the 0x protocol monorepo by adding the Cream Bridge contract, demonstrating expertise in smart contract development. The user implemented a bridge that allows for token swaps using Cream Finance, integrating with Balancer pools for efficient asset exchange. The changes also included updates to test and source files, adapting existing code for the new Cream Bridge functionality. Furthermore, the user made code formatting changes.
monorepoexchangeethereumblockchain0x-protocol
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