# Andrew D. > Staff Software Engineer at Cash App Location: San Francisco, California, United States Profile: https://flows.cv/andrewd2 ## Work Experience ### Staff Software Engineer @ Cash App Jan 2021 – Present ### Staff Software Engineer @ Square Jan 2021 – Present ### Software Engineer @ FOSSA Jan 2018 – Jan 2019 ### Freelance Software Developer @ Freelance Jan 2017 – Jan 2018 ### Senior Software Engineer @ Optimizely Jan 2014 – Jan 2017 | San Francisco Bay Area Starting with a team of two engineers, helped design, code and ship Optimizely X Full Stack from ideation to a product with millions in ARR. Built and shipped features across the stack, designing customer-facing REST APIs, implementing business logic in Python codebase, and leading frontend development on the team Architected and built an end-to-end, black box testing framework to ensure accuracy and consistency across Optimizely X Full Stack SDKs in 6 languages. Framework was written in Python, allowing developers to rapidly write tests in a familiar language, and is still being used and built upon Designed and implemented the password storage system used today for all Optimizely accounts, based on industry best practices and with a password versioning mechanism for future-proofing and gradual migration from older, less secure system Mentored interns, new hires, and junior engineers and successfully helped them grow into mid-level and now senior engineers ### Founder @ OfferD Jan 2012 – Jan 2013 | Beijing, China Founded OfferD, a boutique admissions consulting firm that helped talented Chinese students express their full academic potential at elite institutions abroad Wrote a Django-based CRUD application that handled all aspects of the company’s e-commerce presence, including multi-currency checkout and payment processing, consultant payments, and email marketing ### VIP SAT Instructor @ DK Education Jan 2011 – Jan 2012 | Beijing, China ### Computer Consultant @ University of Michigan Jan 2010 – Jan 2011 | Ann Arbor, MI ### Legislative Intern @ United States House of Representatives Jan 2009 – Jan 2009 ## Education ### B.A. in East Asian Studies University of Michigan ### Princeton in Beijing / 普林斯顿暑期北京中文培训班 Princeton University / Beijing Normal University ### Inter-University Program for Chinese Language Studies (IUP) / 清华IUP中文中心 Tsinghua University ## Contact & Social - LinkedIn: https://linkedin.com/in/andrewdelikat --- Source: https://flows.cv/andrewd2 JSON Resume: https://flows.cv/andrewd2/resume.json Last updated: 2026-03-23