Chunyan Song's Email Addresses & Phone Numbers

Software Engineer, Runtime System @ Twitter Owner of https://github.com/twitter/scrooge, a Thrift compiler for Scala and Java as a drop-in replacement for the Apache Thrift code-gen. Drove dependency management across 100+ projects on data sharing protocols. Sporadic contributor to https://github.com/twitter/finagle, an asynchronous and composable network stack in JVM. From December 2011 to May 2013 (1 year 6 months)...

Software Engineer, Runtime System @ Twitter Owner of https://github.com/twitter/scrooge, a Thrift compiler for Scala and Java as a drop-in replacement for the Apache Thrift code-gen. Drove dependency management across 100+ projects on data sharing protocols. Sporadic contributor to https://github.com/twitter/finagle, an asynchronous and composable network stack in JVM. From December 2011 to May 2013 (1 year 6 months) San FranciscoEngineering Lead @ Uber During my 5 years at Uber, I built large scale realtime software solutions in several critical business domains: growth, risk and finance. I led engineering execution and cross functional collaboration, set vision with business stakeholders, designed system architecture and drove project deliveries. The software systems replace the inefficient, manual and analysts driven processes with automated in-process analysis and model improvements.I also participated in several committees to set Uber’s technical directions, define engineering processes, increase developer productivity and promote cross-org alignment.The initiatives I had led: * 2019 - present Tax & Compliance: powering global compliance in 700+ markets. * 2017-2018 Financial Intelligence: created AI based financial forecasting and optimization systems https://eng.uber.com/transforming-financial-forecasting-machine-learning/, powering strategic finance planning, global budget allocation and marketing spending optimization.* 2016 Incentive Risk: created "risk aware dispatch" to detect realtime collusion which reduced incentive loss and fake trips by 80% in first month. Areas I advised: * Financial risk management: budget allocation scenarios, stress testing, FX risk, credit risk * Financial business systems: ecosystem surrounding Oracle ERPs for accounting, supply chain etcSome early projects I led: * 2015 - 2016 growth platforms: rider promotions, driver incentives. Saved Uber at least $100mm every year through optimized incentive structures. Also played a key role in the migration of critical services from monolith repo to SOA. * 2014 - 2015 rider growth: countless projects in growth analytics, funnel optimization, A/B testing, and experimentation framework. From September 2014 to August 2019 (5 years) Interim CTO @ GemShare (acquired by NextDoor) GemShare is a Q/A platform for local service recommendations, backed by partners at Benchmark, Greylock and Menlo Ventures. Our iOS app was released on April 3rd, 2014, featured by Apple as a best new app. Worked side by side with head of product, designers, BD and community managers in collaboration with external mobile contractors. Wrote the first lines of code and built the backend server from scratch: APIs, database, social graph, search engine, news feed, content subscription, automated curated email digests, internal tools including admin, metrics tracking and analytics. I picked up Android and iOS development at the CodePath, where I remain as a mentor. I rewrote half of the Gemshare iOS app and built an Android prototype. From June 2013 to September 2014 (1 year 4 months) San Francisco, CaliforniaSoftware Engineer, Parallel Computing Platform @ Microsoft Shipped the Parallel Extensions library in .NET Framework 4.0: http://en.wikipedia.org/wiki/Parallel_Extensions. Author of concurrent data structures and half synchronization primitives -- the foundation layer for Parallel Tasks library and Parallel LINQ to which I was a contributor as well. (06/2008 – 03/2010)Built the compiler for a math formula language integrated in Excel, for domain specialists to manipulate, model and visualize data in Excel environment. (06/2010 – 07/2011) From June 2008 to November 2011 (3 years 6 months) Greater Seattle AreaAdviser and investor @ Various Alike, acquired by Yahoo in 2012TomoCredit Eng Lead, Office of the CTO Homes @ Airbnb As a senior hire to Airbnb, I drive the redesign of foundational services and migration from service oriented architecture to domain driven architecture. By addressing system complexity and scalability issues, my focus is to increase developer productivity, expedite product development and enable the next phase business growth.