Chao Tan

Profile

Problem Solver, passionate in ambiguity fixing, from CS issue diving deep to business pain point inception; belief in goal delivery and task automation, built team with tech vision, owner culture and right mechanism; proficient in microservices architecture, performance tuning and operation, refactored and rearchitected complex production monolithic systems; rich experience in API design and review; good data flow knowledge on both streaming and persistence stage, familiar with AWS purpose-built databases; hands-on programmer in Java and Python; wrote a lot.

Experience

Amazon Sr. SDE 2016 till now

• Tech lead in Alexa cloud platform services, particularly focus on Alexa Skill Kit
  • subject matter expert in Alexa “event flow” (vs. voice flow) and “skills security”
  • owned the legacy remote application contract for hundred internal teams
  • led the new universal application contract for both internal and external Alexa developers
  • Alexa Call Leader, Alexa API Reviewer, Amazon Security Certifier, Amazon Mentor
• Built A2GS from scratch for Amazon’s consumer robot (Astro) beta launch; rearchitected and repurposed it for decoupling project; owned service operational excellence; lead 12 SDE team and watched 3 sister teams.
  • operated Amazon Tier-1 service with hundred thousand TPS with millisecond-latency threshold
  • designed 3 major APIs with multi-versions that serving several clients and hundreds down streams
  • documented platform knowledge repository that served developers both internally and externally
  • dived JVM threading and heap to save multiple seconds cold-start time; optimized Client, LB and Service connection config with 100 times load; customized throttling with proper granularity.
• AlexaService Decoupling: decoupled THE Alexa cloud service into three fundamental platform services so that Alexa-wide development velocity improved significantly, impacting ten thousand developers.
  • led the Alexa Event API design that reviewed and signed off by L10 engineer lead
  • led the engineering team (14 SDE) to decouple and migrate without customer impacting outage
  • coached 2 sister teams (10 SDE) for other APIs delivery and cooperated with 3 partner teams ( 4 0+ SDE)
• amazon.com/bbp (Amazon Bargain Finds): key contributor of the BrightBuy project with team of 8 engineers; designed and implemented frontend preview page; resulted a billion level GMV subsite.
• haimai.amazon.cn (Amazon Global Selling): tech lead of the HaiMai project with 5 engineers; wrote tech strategy of seller experiment lab; resulted 200% traffic increase and 50% growth of China based Amazon Global Seller registered year-over-year.

HSBC Senior Software Engineer 2012 – 2016

• Founded Murex Environment Management Platform (MESA) from scratch, reduced environment initialization time from 2 days to 2 hours; automated the testing full-regression from 2 weeks human task to daily auto job.
• Expanded the MESA to North America region; improved Valuation Service reconciliation procedure saved 75% workload; reduced middle office support tickets to 20% via self-service tooling.

eBay Inc. Release Engineer 2011 – 2012
eBaoTech Application Developer 2010 – 2011
Wondersgroup Software Engineer 2008 – 2010

Education

East China University of Science and Technology 2008 B.S. in Computer Science; Diploma in Finance.