張顥懷

張顥懷 Email and Phone Number

Backend Developer @ OneClass
張顥懷's Location
Taipei City, Taipei City, Taiwan, Taiwan, Province of China
About 張顥懷

4+ years experience in Backend/DevOps. Capable of making contributions in both Taiwanese leading Telecommunication and startups. Skilled in solution design, process optimization and communication. Strong initiative in performance optimization and deliverying reliable system.

張顥懷's Current Company Details
OneClass

Oneclass

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Backend Developer
張顥懷 Work Experience Details
  • Oneclass
    Backend Developer
    Oneclass Jul 2023 - Present
    台灣 臺北市
    Responsibility:• Provide solution and develop RESTful APIs: NestJS/Express + PostgreSQL/Firestore, SQL optimization, write unit tests and Dockerfile, personal info encryption• Dedicate in 5 projects including legacies(300+ APIs) and green fields simultaneously• Design database structure capable of handling millions of records through partition, denormalization and covering indexContribution:• Plan and lead databases combination of two related… Show more Responsibility:• Provide solution and develop RESTful APIs: NestJS/Express + PostgreSQL/Firestore, SQL optimization, write unit tests and Dockerfile, personal info encryption• Dedicate in 5 projects including legacies(300+ APIs) and green fields simultaneously• Design database structure capable of handling millions of records through partition, denormalization and covering indexContribution:• Plan and lead databases combination of two related system• Transfer 100% existing customers to new product through data migration from NoSQL(Firestore) to SQL(PostgreSQL) with a different schema• Review and manage 30+ technical debt• Reduce 70% CPU vCore and api response time through SQL syntax optimization and pagination over 50 functions Show less
  • 遠傳電信
    Site Reliability Engineering - Advanced Software Engineer
    遠傳電信 Jun 2021 - Apr 2022
    Taipei
    Responsibility: • Deploy and manage over 50 servers including: K8S, SFTP, internal DNS, Openfire, DICOM, Vidyo on FarEastone's private cloud• Firewall ACL management• Implement CI/CD through Gitlab CI/CD• IoT platform component EMQX/Nodered build and testContribution: • Performance appraisal Far Exceeded 1st year• Reduce system load testing error rate from 17% to 0% by survey and implement APIM• Improve IoT platform… Show more Responsibility: • Deploy and manage over 50 servers including: K8S, SFTP, internal DNS, Openfire, DICOM, Vidyo on FarEastone's private cloud• Firewall ACL management• Implement CI/CD through Gitlab CI/CD• IoT platform component EMQX/Nodered build and testContribution: • Performance appraisal Far Exceeded 1st year• Reduce system load testing error rate from 17% to 0% by survey and implement APIM• Improve IoT platform MQTT payload allowed size from 1 MB to 5 MB avoiding data loss• Integrate auto code review tool CodeClimate into GitLab CI/CD process independently in 2 weeks Show less
  • 遠傳電信
    Iot Vertical Applications - Backend Developer
    遠傳電信 Dec 2019 - May 2021
    Taipei
    Responsibility: • Develop backend RESTful APIs - NestJS/TypeORM + SQLite and pack into exe• Integrate 3rd party video conferencing solution: Zoom/Vidyo SDK• Cooperate with Zoom/Vidyo global support teams for server management• Cooperate with external partners for demand analysis and error handlingContribution: • Keep million-dollar business alive by assessing alternative of Zoom and migrating from Zoom to Vidyo
  • Appworks School
    Trainee - Web Backend Engineer
    Appworks School Jun 2019 - Oct 2019
    Taipei
    • Acquired knowledge of backend development by project oriented programming program• Build functional ecommerce website through project in 3 weeks independently. • Cooperate with Front-End/Mobile trainees to add features on Stylish in one week.• Develop project in 5 weeks.• Scrum for project management.
  • 和碩聯合
    Customer Service Business Unit - Fulfillment Pm / Material Control
    和碩聯合 Jun 2016 - Apr 2019
    Taipei
    Responsibility: • Supply service parts/tool from NPI to EOSL• Co-work with planners to meet target fulfillment rate and balance inventory level• Trace material transferring progress from factory to CSBU warehouse or trace delivery if buying from vendor directly, generally holding 400-700 items on hand• Cooperate with foreign repair centers (Shanghai/Japan/Czech/U.S./Mexico/Taiwan), verify hot items and reply ETD weekly by email, have telephone conference… Show more Responsibility: • Supply service parts/tool from NPI to EOSL• Co-work with planners to meet target fulfillment rate and balance inventory level• Trace material transferring progress from factory to CSBU warehouse or trace delivery if buying from vendor directly, generally holding 400-700 items on hand• Cooperate with foreign repair centers (Shanghai/Japan/Czech/U.S./Mexico/Taiwan), verify hot items and reply ETD weekly by email, have telephone conference sometimes• Negotiate with Production Control priority of orders and production schedule• Ensure LT to meet customers demand, weekly report ETD to sales• Track RFQ sent to vendors, assess and negotiate if response not reasonable or expected to be denied by customer• Stock management & analyzeContribution: • Automatize 50% monthly report and saved 0.3 headcount by VBA• Improve planning method and saved TWD 2 million cost from rebuilding the tool• Lead project of transferring production line from Suzhou to Chongqing, communicated across 5 departments and multiple levels• Improve fulfillment rate to meet target in 3 months after taking over• Get all NPI service parts for free from vendors in 2018’s Desktop project• Give suggestion to planners taking holidays in consideration to improve planning method Show less
  • National Palace Museum
    替代役
    National Palace Museum 2013 - 2014

張顥懷 Education Details

Frequently Asked Questions about 張顥懷

What company does 張顥懷 work for?

張顥懷 works for Oneclass

What is 張顥懷's role at the current company?

張顥懷's current role is Backend Developer.

What schools did 張顥懷 attend?

張顥懷 attended 國立交通大學.

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