Robert Sun
Senior Fullstack Engineer at OpenRouter
Australia
Summary
🤩
Rockstar🎓
Top SchoolRobert Sun is a software engineer with 11 years of experience building scalable web and blockchain systems, most recently as a Founding Engineer at OpenSea where he helped evolve core marketplace SDKs. He has full-stack and backend fluency in TypeScript and smart-contract integrations, contributing significant features to prominent open-source projects like opensea-js and seaport-js (including EIP-712 support, bulk cancellations, and sign/cancel order logic). Prior roles at LinkedIn, Facebook, and Amazon show a consistent record of improving product performance and reliability—whether cutting search latency, driving a $1M+/day GTM launch, or globalizing DynamoDB-backed services. He pairs hands-on implementation skills with mentoring and frontend leadership experience, having led recruiter search UI efforts and reusable component libraries. Based in Australia, he brings both startup and large-enterprise discipline to on-chain marketplace problems and developer tooling. An under-the-radar strength is his knack for refactoring and build-process improvements that raise long-term maintainability across complex codebases.
11 years of coding experience
10 years of employment as a software developer
Bachelor's Degree Computer Science, Bachelor's Degree Computer Science at Georgia Institute of Technology
English
Github Skills (14)
smart-contracts10
typescript10
javascript10
typescripts10
sdk10
web3js10
ethereum10
typescript-types10
blockchain10
apidoc9
eip9
api9
nodejs7
react5
Programming languages (6)
Github contributions (5)
ProjectOpenSea/seaport-js
Mar 2022 - Oct 2022
A TypeScript library to interface with the Seaport marketplace.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 releases, 24 reviews, 86 commits in 6 months
Contributions summary:Robert has primarily contributed to the core functionality of a Seaport marketplace client library written in TypeScript. Their work focuses on adding and implementing key methods, specifically the `signOrder` method. They have also implemented the underlying logic of the `cancelOrders` method, showing a strong understanding of the contract and its interactions, and refactored the code.
typescript
ProjectOpenSea/opensea-sdk
Aug 2021 - Jan 2023
TypeScript SDK for the OpenSea marketplace
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:55 reviews, 154 commits, 44 PRs in 1 year 5 months
Contributions summary:Robert primarily focused on updating and refactoring the codebase to improve the functionality of the OpenSea marketplace SDK. They updated API endpoints, added an option to bypass read-only providers, and implemented the ability to freeze listings. The user also made significant contributions to supporting Wyvern 2.3 features including bulk cancellations and EIP-712, while also making improvements to the build process and dependencies.
openseatypescript
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.