Nathan Nichols
Systems Software Engineer at Citadel Securities
London, England, United Kingdom
Summary
🤩
Rockstar🎓
Top SchoolNathan Nichols is a systems software engineer with 8 years’ experience building high-performance C++ and full-stack systems, currently at Citadel Securities in London after roles in Chicago and at Ripple. He has deep blockchain backend experience—contributing to rippled’s transaction handling and xrpl.js’s migration to TypeScript and Jest—showing comfort across low-level daemon work and developer-facing libraries. Nathan combines production systems thinking with tooling and test-suite overhauls, having refactored RPC/SQLite logic and introduced linting and codec improvements. A University of Kansas computer engineering graduate and co-founder of a student blockchain institute, he brings both hands-on implementation skills and community-minded open-source contributions.
8 years of coding experience
7 years of employment as a software developer
High School Diploma, High School Diploma at Andover High SchoolBachelor of Science - BS Computer Engineering, Bachelor of Science - BS Computer Engineering at University of Kansas - School of EngineeringSELF Program - University of Kansas
Github Skills (20)
javascript10
c-language10
typescript10
ledger10
blockchain10
typescript-types10
typescripts10
cprogramming-language10
eslint9
sql9
xrp9
api8
rpc8
cryptography8
database-design7
Programming languages (9)
Github contributions (5)
XRPLF/xrpl.js
Jun 2020 - Dec 2021
A JavaScript/TypeScript API for interacting with the XRP Ledger in Node.js and the browser
Role in this project:
Full-stack Developer
Full-stack DeveloperContributions:2 releases, 385 reviews, 135 commits in 1 year 6 months
Contributions summary:Nathan's primary contribution involved migrating the codebase from Babel/JS to TypeScript, encompassing a complete overhaul of the test suite to use JestJS. This migration involved updating dependencies, refactoring code, and resolving testing issues. Additionally, the user integrated linting using ESLint and made significant code changes within the ripple-binary-codec package, refactoring various components for improved functionality and maintainability.
rippleapibrowserjavascriptnodejscryptocurrencies
XRPLF/rippled
Jul 2020 - Jul 2022
Decentralized cryptocurrency blockchain daemon implementing the XRP Ledger protocol in C++
Role in this project:Backend Developer
Backend DeveloperContributions:29 reviews, 10 commits, 17 PRs in 2 years
Contributions summary:Nathan contributed to the backend logic of the XRP Ledger daemon. Their work focused on enhancing the server's configuration, specifically by enabling adjustable limits for the transaction job queue. They also added functionality to the "/vl" HTTP endpoint, incorporating the public key into the response. Furthermore, the user refactored RPC handling for transaction metadata retrieval, transitioning from separate key-value store queries to loading both transaction and metadata from SQLite.
cryptographycppxrpldaemonblockchain
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