About

Work Experience

• Contract developer, 

  Feb, 2021 - Feb, 20221 year

  I was helping in researches on how the EVM compatible scaling solution Optimism works, and figure out a way to circumvent the potential gas costs accumulated from periodic batch commitments on-chain while balancing scalability and security.

  • Designed and built a forked version from the OVM geth to eliminate the needs of making periodic on-chain commitments while still guarantee the data availability for fraud proof and verification

  • Helped the community project teams on the integrations, such as porting Uniswap solidity contracts

• Contract developer, 

  May, 2020 - Feb, 20219 months

  I joined the Neuron (https://github.com/nervosnetwork/neuron), the official wallet of CKB which is a blockchain based on UTXO model, to lead the refactor of the source code and improve its benchmark so as to rescue its usability. Apart from Neuron, I was helping review community grant projects on CKB.

  • Refactored and optimized synchronization performance with CKB node to reduce the total sync time from hours to within 30 mins

  • Increased test coverages to improve its maintainability

• Senior Developer, 

  May, 2018 - May, 20202 years

  The focus was on building an Ethereum second-layer scaling protocol, nahmii (https://www.nahmii.io). I was mainly working for the Ethereum wallet, but also contributing to the backend APIs and the solidity contracts.

  • Built a desktop Ethereum wallet (https://github.com/hubiinetwork/hubii-core) integrated with the second-layer scaling protocol "nahmii" (https://www.nahmii.io).

  • Help wire up customer-oriented products with their smart contracts/backends.

  • Built tools to ease the collaboration between the internal teams.

  • Built a simulation tool to test the expected behaviors in various scenarios under the nahmii protocol.

  • Built a command line tool to automate the contract verification on Etherscan, particularly helpful for complex and large contracts (https://github.com/hubiinetwork/sol-commander).

• Creator, 

  Jan, 2018 - Present

  vbot is a visual regression test tool, which can visually highlight the differences in a web page after code changes.

  • Built an open source tool for visual test (https://github.com/katat/vbot)

  • Built a web based SaaS product vbot.io

• Contract developer, 

  Jan, 2017 - May, 20181 year 4 months

  FlexFunds is a company offering securitizing services. I helped in re-designing the system architecture, and implementations including automated financial data processing, internal admin tools and customer facing web applications.

  • Built programmable job schedulers (using Docker and Jenkins) to automatically handle the financial data collections and calculations.

  • Integrated with QuickBooks to automate the issuing of invoices to clients.

  • Built admin tool for the internal teams to manage the financial data.

  • Refactored the company's client-facing web app to make it flexible in adapting to future changes.

  • Wired up among the different internal systems.

• Co-founder, 

  Feb, 2015 - Jun, 20183 years 4 months

  FundPie is a robo-advisor product, which I co-founded with my ex-coworker in Morningstar. The vision is to facilitate users to get investment advises on assets allocation based on their risk/profit preferences via a mobile app, which helps them purchase shares in index fund portfolios, automate holding rebalance and keep track of the investment performances.

  • Built a cross-platform mobile app, which works on both iOS and android.

  • Built a system to automate data processing.

  • Built and optimized calculations to analyse investment portfolios on-the-fly with a large volume of data.

  • Helped grow a team of junior developers to be able to work on tasks.

• Developer, 

  Jun, 2013 - Apr, 201410 months

  ZootRock is a social media service, which help companies' marketing by automatically posting media posts through different social channels, such as Twitter or LinkedIn.

  • Built the system from scratch.

  • Funded by the 500.co

  • Helped grow a team of junior developers to be able to work on tasks.

• Developer, 

  Jun, 2010 - Jun, 20122 years

  • Migraded the legacy Delphi source code base and Sybase database to Microsoft solutions.

  • Optimized the core algorithm's performance, while reduced database's overhead.

  • Integrated with frontend and backend frameworks, such as MVC.NET/NHibernate/NUnit etc, at that time to speed up the developments in a team.

Skills

Education

Volunteer Work

References