John Tseng Email & Phone Number

San Francisco, California, Us

Build real time pipelines to make sense of on-chain Solana data.

Developed geographically distributed systems to become one of the fastest in minting NFTs. Leveraged MEV networks to prioritize our transactions and reduce failures.Developed systems to become one of the fastest to reveal NFT data, sometimes revealing data a minute before other popular systems giving us an opportunity to snipe rare NFTs before others.Developed an aggregator Ethereum node that is faster than others and failproof.Developed a bot and associated Solidity smart contract to find arbitrage opportunities between Uniswap pools.This is a side project while I worked at Google.

Mountain View, Ca, Us

Led a team of 10 engineers to maintain a contracting system that processes $150B of revenue.Reduced server response time by 79% by setting measurable goals, creating load tests, and optimizing the database.Resolved production outages and recovered lost data.Streamlined project management to provide accurate estimates of task completion dates and saved multiple engineer-months of work.Influenced the delivery of the application through design reviews, unblocking other engineers, investigating operational issues.Mentored junior engineers.Scoped and designed the system in collaboration with product managers and UX designers.

Reduced the time to handicap a race from hours to minutes.Developed Machine Learning (ML) models to predict the results of the race. These models were more accurate than the betting public and professional expert predictions.Deployed a scalable service to run the ML models in AWS.Supervised and led a team of engineers to build a distributed web application for serving ML predictions along with user data and billing, leading to 15% month-over-month revenue growth.

Designed, developed, and launched:- Automated trading system and backtesting framework- Website and management portal for placing lunch orders over SMS- Internal web application for tracking orders and inventory for a metal processing companyEnhanced and stabilized web portal and mobile app API for HVAC contractors to easily create and manage invoices.Decreased support tickets by 90% by fixing dozens of bugs in a web application for tracking RV maintenance.

Plano, Tx, Us

Dallas, Texas, Us

Strategic - Develop a deep knowledge of the user and the problems they face by conducting research and talking to early adopters - Work collaboratively with our design and data teams to solve the problems of the user by creating new features - Oversight of all development, maintenance and debugging of our web application - Understand the company’s vision and strategy well enough to anticipate challenges and formulate solutions before they affect performance Tactical - Building, testing and de-bugging features in Drupal - Implementing a combination of off-the-shelf and custom modules within Drupal - Integrating the platform with various third party SDKs, specifically Facebook, Twitter and Pinterest - Implementing the platform with various third party APIs, specifically Intercom.io, Zendesk, New Relic and others - Utilizing A/B testing platforms such as Optimize.ly to help the company progress through build-measure-learn cycles of feature development - Implementing Agile development processes and maintaining an Agile culture within the engineering team - Optimizing the platform for mobile responsiveness - Implementing e-commerce capabilities

Plano, Tx, Us

Create Fair Lending website - a site where the user can query the database (SQL server) with flexible filters. The site was first implemented with Web Forms, transformed to jQuery with generic handler backend, then finally AngularJS frontend with MVC4 Web API backend. Create deployment tools in WinForms to deploy IIS applications across domains. Create database deployment tools with rollback across 600+ databases.Hold technical talks on various topics to other developers. Topics include: latest development tools, programming paradigms, and algorithms. Automate parts of the disaster recovery process: connecting completed matching SAN replicas to Windows and attaching all matching database files to SQL server. Maintains existing code base by fixing bugs, enhancing performance, and adding new features. Maintains and modifies existing applications on their own as well as under direction from senior staff members.Performs maintenance programming for existing version. Performs custom programming at customer request.Assumes responsibility for ongoing data architecture for product.Collaboration with technical architects and product development to assess client and company requirements for software solutions.Ownership of software solutions from design to delivery.Creation and maintenance of routine SQL Server Database Administrator functions or SQL Server 2008 databases such as: table indexing, views, backups, stored procedures, SQL Server log reviews/error corrections, database creation and changes and scheduled replication of databases.Designs/codes applications following specifications using the appropriate tools.Proactively learn and utilize new technologies, concepts and procedures as appropriate to project requirements.

Doctor Of Philosophy (Phd), Computer Science

Master Of Science (M.S.), Computer Science