Tai Y Yu Email & Phone Number

California, United States

Foster City, California, Us

San Francisco, California, Us

♦ Twilio Join Room link and group consultation integration♦ Integrate and sync Stream chat messaging♦ Lead GCP Migration of Cloud infrastructure from Aptible w/ SADA♦ Developed, implemented and deployed a video consultation recording pipeline♦ Define quality objectives and processes for Engineering♦ Created terraform for GKE provisioning for GCP migration from Aptible♦ Transformed CD pipeline with the integration of Codefresh CI/CD platform♦ Drove adoption usage of GCP Secret Manager♦ Managed autoscaling and reduced memory usage of cloud assets and workloads♦ Auto scale Aptible web and workers with cron scripts to reduce costs♦ Optimized endpoints and Performance test framework on prod and staging♦ Improved performance with the adoption of gevent gunicorn workers♦ Django 3.2 upgrade from 1.11♦ Add Postgres Read Replicas for scaling

San Francisco, California, Us

♦ Lead Core Engineering team to guide architectural design decisions♦ Lead project to implement multitenancy with django-tenant-schemas♦ Facebook Messenger Integration with profile capture♦ Text2Apply profile capture, validation♦ Implemented MYA-HMAC-SHA256 to enforce HMAC API key authentication♦ Preprocessors for ingestion of csv processing with location, phone validations♦ S3 AWS event auto ingestion, validation and processing of csv files for campaigns♦ Enforced Authorization Django permissions with groups for recruiters, candidates, admins♦ Integrated ATS adapter services with iCIMS, Bullhorn, Avature, JazzHR ATSs♦ Customized Email Templates with SendGrid integration

San Francisco, Ca, Us

♦ Lead project for Vendor priority recommendation system for valet load-in process♦ Facebook Connect, Signup, Pixel and offline conversion tracking API handling♦ Added Order, Discount creation/update forms for customer details internal pages♦ Created ML infrastructure using closest constrained K-means for optimal route creation♦ Enhanced customer designation of audience type for better analytics for Facebook API♦ Created Referral discount credit customer facing web pages and backend infrastructure♦ Add Lead, Lapsed Customer, Nones, Active customers to Facebook audience management♦ Use Proximo to proxy facebook API requests through to 1 whitelisted static IP address♦ GoogleApi for address canonicalization and location determination♦ Chi-squared test for vendor garment miscategorization♦ Segment integration replacing mixpanel for marketing analytics♦ New NPS SMS survey to gauge customer promoter scores using Twilio and celeryTechnologies: Python, Django, Django-CMS, PostgreSQL, Bootstrap 3.3, GoogleMapsAPI, Facebook API, Twilio, Heroku, ElasticSearch, Trigger.io, Proximo, HelpScout,Numpy, SciPy, Segment, Pandas

San Mateo, Ca, Us

♦ Chrome Extension to interact w/ LinkedIn and SalesForce to help prospect for leads.♦ Similar companies Swagger API endpoint to get accurate semantically similar companies.♦ Admin interface for Ad campaign management SaaS UI to configure Mongo connections.Technologies: Python, Flask, SQLAlchemy, Alembic, Docker, MySQL, Mongo, Swagger API, Javascript, React

New York, Ny, Us

♦ Full stack implementation of WLAN scheduler.♦ Add enhanced features for wired statistics, multiple RADIUS servers, insights analytics. ♦ Architected integration of Facebook Wi-Fi captive portal redirect workflow into product. ♦ Addressed security concerns adding defenses for CSRF, Content sniffing.♦ Build Django cross site referrer to simulate malicious attacks on Java controller site.♦ Interact w/ forum users to address hundreds of tickets to stabilize existing product lines. ♦ Work w/ UX and Android developers to prototype Theme Manager for VOIP phones.Technologies: Java, Javascript, Backbone, Mongo

San Jose, California, Us

♦ Defined Analytics Location Engine’s persistence strategy with Hadoop/Spark clusters. ♦ Architected and implemented fingerprinting of RSSI for location predictions.♦ Filed patent on location predictions using circumcenter of relative station RSSIs.♦ Travel to do due diligence evaluations on potential acquisition candidates.♦ Build out scale and performance testing w/ AP Simulators on VMWare R620 Dell servers. Technologies: Python, C++, VMWare, Hadoop

San Jose, Ca, Us

♦ Designed a shopping analytics front end charting web appliance using Django / Python ♦ RESTful API interface to Cassandra and Hadoop backend databases♦ MySQL glance and queued query configuration admin interface♦ Leveraged RickShaw D3 charting and Detail-Wrap bootstrap admin librariesTechnologies: Django, D3, Cassandra, Hadoop, MySQL, Jira

♦ Architected a farm management website with GeoDjango, PostGIS, Leaflet, mapbox, Angular, django-storages on Amazon Web Services cloud platform.♦ Setup and administered Jenkins CI development system for code analysis, builds, and integration testing for every commit to GitHub.♦ Administered AWS EC2 instances with boto, fabric scripts to create binary replicating PostgreSQL servers with periodic cron job that create backup snapshots of EBS volumes.♦ Migrated company repositories from Jira’s SVN to Github.♦ Developed and integrated with OpenLayer Editor to edit multipolygons associated with fields.♦ Designed and improved schemas related to soil measurement and management.♦ Designed and developed Qt based Windows/Linux clients that controlled a transfer and dispense robots using Digital I/O and Misumi single axis robots. ♦ Designed and improved Qt based Windows/Linux clients to measure, control and upload soil measurement equipment.♦ Developed controls and improvements on Nitrate measuring spectrum analysis system that takes in soil samples, processes it, take measurements, and upload data files for processing.Technologies: Django, PostGIS, OpenLayers, PostgreSQL, Jenkins

Sunnyvale, Ca, Us

♦ Designed and developed the Ad Workflow Engine that takes HLS playlist stream of manifest files via HTTP Put to insert Ad chunks in the resulting stream.♦ Parsed text based CCMS config files and playlists using boost Spirit qi/karma♦ Used SOCI C++ library to interface with PostgreSql and sqlite3 to interact with Django.♦ Developed Thrift API to interact with Django and a redirection engine on another host.♦ Create timers and cleaners to manage and control timings within the system using libevents.♦ Installed, configured, and managed Jenkins along w/ plugins to build, unit test, integration test, static analysis, code coverage for continuous integration software development process.♦ Developed Management and control plane software written in C++ and Python as a backend to javascript GUI.♦ Interfaced with existing common API interface to develop management and control infrastructure to interface with new GUI front end with Thrift being the new API transport scheme.♦ Investigated various open source solutions to interface with Django, SQL, and present solutions for evaluation and analysis.Technologies: HLS Ad insertion, C++, Python, Thrift, Django, SQL

San Jose, Ca, Us

♦ Lead new Ambassador project to achieve greater scalability to enable 5000 APs and 50000 client for HREAP AP and home APs. Resolve Endian issues between host control plane processor and data plane line card. ♦ Co-Lead NGWC project defining wireless client authentication, mobility control between legacy wireless module and IOS. Developed AP Counting Licensing model for new product line. Wrote Wireless ASIC requirements documents to define the functionality and features of the Doppler ASIC that will change the landscape of wire and wireless integrated switches. Emulator and ASIC bring up to allow client association, authentication and mobility. ♦ Lead WiSM (Wireless Service Module) project for Cat6500 to achieve fastest 8 month delivery of a port of startup controller solution to integrate with Cisco’s flagship product. Became the key interface for the project team to the SW team. Coordinating bug scrubs, cross BU interactions, design reviews and documentations to facilitate successful product launch.♦ Implement CCX features on LWAPP controller and Atheros based vxWorks APs all in C++ in embedded applications.♦ Work on scalability and performance as well as redundancy for WLSM (Wireless LAN Services Module) to scale to over 1,000 APs and 10,0000 clients.♦ Implement proxy mobile IP in C++ on vxWorks APs for c350 and c1200 platforms.Technologies: C/C++, Linux, Gigabit Ethernet Drivers, Cavium, Multi-core processor, 802.11

♦ Lead Sprint field trial to integrate voice over IP integration with CDMA cell base station.♦ Implemented MGCP parsing and message passing facilities.♦ Used socket applications to route and translate MGCP messages for internal private control.Technologies: C, MGCP, socket, CDMA

♦ Designed and developed a system services layer for an embedded network processor for VoDSL application.♦ Developed drivers for HDLC, Inter-CPU Communications, and Voice Packetization with Jitter Buffering.♦ Designed cascading inter-chip, inter-cpu interface for multiple network processors.♦ Evaluated IP protocol stacks, Web Servers, SNMP stacks, RTOS’s♦ Designed Voice of ATM and Voice over Frame Relay routing and packetization within the network processor. Technologies: C, RTOS, HDLC, ATM, VoDSL

♦ Developed T1/E1 driver for the Brooktree’s BT8370 chip for a cellular base station.♦ Took over application blocks for status handling, statistics gathering and diagnostics blocks.♦ Designed a downloadable booter scheme for increased flexibility.♦ Debugged and enhanced flash file system, I2C, SCC, timer, UART drivers and software for the MPC860 on a custom kernel based on Vertex.Technologies: C, T1/E1 driver, boater, I2C, SCC, MPC860

♦ Designed and developed reset and initialization sequence for i960 based Satellite interface card. This included booting from host disk and handshaking protocols using doorbell interrupts and i960 messaging.♦ Designed and developed a user process interface DLL that encapsulates and manages application connections to a NDIS driver.♦ Developed a processor specific interface layer for the i960 message queues under vxWorks.♦ Developed the Host Communication Interface layer that facilitates the communications from the target to the host via the message queues and shared memory.Technologies: C, VxWorks, i960, shared memory communications

Newark, California, Us

♦ Managed two BIOS engineers to develop, test and release BIOS updates for Pentium, and Pentium II motherboards.♦ Developed a Virtual Dial-Up Networking client-server application that enabled remote control of RAS and DUN under Win95 and Windows NT.♦ Developed a NDISWAN driver that used the Seimen’s HSCX chip for Tyan’s ISDN card.♦ Brought up and customized the IxWorks for i960 in Tyan’s I2O motherboard using Wind River’s Tornado development system.Technologies: C, BIOS, NDISWAN, ISDN, VxWorks

♦ Developed Win95/NT NDISWAN driver for their internal passive ISDN card. Worked on all aspects of the driver including the TAPI OID messaging state machine, Request OID, Call handling, Link handling, send packets, receive packets, interrupt handling, initializing and shutting down of the card.♦ Debugged switch compatibility issues in ISDN signaling and lower layers.♦ Contributed in design of the GUI and architecture of the product.Technologies: C, NDISWAN, ISDN, TAPI, GUI

♦ Designed, and implemented a real-time multi-threaded applications in both Windows NT and Embedded DOS.♦ Designed and wrote message routing algorithms in the interrupt service routine for the 16552 UART.♦ Debugged and enhanced 2 DLL's and 3 GUI applications of a network management system that managed their digital radio networks.♦ Wrote a GUI installation setup application that interrogated the registry, initialized SQL database and initialize services.♦ Wrote a NT service that had to access the SQL database through ODBC and communicate with other processes using named pipes.♦ Setup an Internet firewall using TIS's firewall toolkit for mail, ftp telnet and WWW access.Technologies: C, Windows NT, Embedded DOS, Serial Communication, GUI, ODBC, SQL, Firewall

Us

♦ Wrote a conversion software to convert TIFF, PCX, DIB, and Targa graphics formats into frame buffer format.♦ Used various dithering and quantization algorithms to display in various color palettes and resolutions.Technologies: C, Image formats, dithering, frame buffers