MingHan Li
Senior Backend engineer • Taipei, Taichung, TW • [email protected]
- As Backend Engineer, have 9 years↑experience.
- As Team Leader, has 3 years↑team management experience.
- Had the experience to design & implement new product software architecture.
- Had the experience to refactor & improve software architecture.
Skills
Programming
PHP / JavaScript / Shell script / Golang
CodeIgniter / jQuery / PhantomJS / CasperJS / NodeJS
Database
MySQL / MongoDB / Neo4j / Redis / Elasticsearch(IK)
Industry Knowledge
Cloud system design / RESTful API / Database design / Systems analysis / Object-Oriented Design / WebSocket / OAuth2.0
Cloud service / System
GCP / AWS / Docker / linux / MacOS
Language
Chinese (Native) / English (Basic) / Taiwanese (Native)
Other
Git / Google Office / Draw.io / Scrum / JIRA
Work Experience
CHATISFY / Senior Backend Engineer / Feb 2024 ~ Present
- Planning software microservice & event-driven architecture.
- Development and code review.
- Co-work with 1 backend & 1 frontend engineers & 2 site reliability engineer.
CHATISFY / Technical Consultant (Contract) / Jun 2022 ~ Mar 2023
- Planning software microservice & event-driven architecture.
- Assist in development and code review.
- Co-work with 1 backend & 1 frontend engineers & 2 site reliability engineer.
Karma Ksana / Senior Backend Engineer (Contract) / Mar 2022 ~ Jan 2023
- Build up OAuth 2.0 provider with Ory Hydra.
- Design and develop OAuth2.0 architecture system & other microservice.
- Discord bot development with GCP Pub/Sub.
- Co-work with 1 backend & 1 frontend engineer & 1 site reliability engineer.
Freelancer / Senior Backend Engineer / May 2021 - Present
- Magic7
- Service like Uber, passengers can reserve these vehicles go to and from between Hong kong and China through the application and track the location of the vehicles.
- Planning software cloud service architecture on AWS.
- Deployment on AWS (Elastic Beanstalk, Amazon RDS, Amazon ElastiCache).
- Use Stripe to accept payments, send payouts to driver.
- Use amap(高德地圖) to track the location of the vehicles.
- Assist in development and code review.
- Co-work with 1 backend & 1 frontend engineer.
- Taiwan Public Television Service Foundation
- Web backend development.
- Build up OAuth 2.0 provider with Ory Hydra.
- Design and develop OAuth2.0 architecture system & other microservice.
- Co-work with 1 site reliability engineer.
Origami Labs / Senior Backend Engineer / Feb 2020 ~ May 2021
- Cloud based walkie talkie system "OFLO"
- Refactor OFLO software architecture from outsourcing
- Design new microservice architecture for more stable, flexible and high availability
- Server architecture on GCP (GCE, GAE, Cloud SQL, Cloud Function, Cloud Tasks, Cloud Scheduler, Cloud Storage)
- Database design (MySQL, MongoDB)
- RESTful API services (NodeJS)
- Integrate GCP Speech-to-Text API in own system
- Integrate VOIP open source in own system
- Web development (console, web app) (NodeJS + VueJS + NuxtJS)
- Manage 2 web engineers, co-work with 2 android engineers
awoo Inc. / Backend Engineer (Team Leader) / Jun 2018 ~ Nov 2019
- AI tech based tagging system “Cupid”
- Team Leader & Scrum Master
- Manage 5 backend engineers, 1 frontend engineer
- Data Warehouse Architecture (Neo4j, MongoDB, MariaDB) & ETL
- Data layering to reduce dependency and to create different data for each application.
- Developed the ETL process between each layer and improved its performance 2-5 times than before.
- Designed database module to develop API or APP.
- Client product feeds
- Scheduled Fetches (XML, CSV) from SFTP or Google Storage.
- Provided solution of dynamic product feed that capable to different clients.
- Designed a mechanism to reduce the cost of GCP virtual machines and resulted in reducing 75% of the cost.
- Products RESTful API
- Cupid Data API (also can provide JS SDK using)
- ProductTag API : providing tags of product to the clients.
- Content API : providing product information of certain tags to the clients.
- SuggestionTag API : providing related tags operated by W2V model and awoo algorithm to the clients.
- Cupid Data FileExport : daily export product tag via file(XML) to the clients.
- Provide solution of cupid data exporting that capable to different clients.
- AI data labeling system for Data Labeling Associate.
- Email/SMS platform “Tigerfly” delivery core system optimize
- Collaborate with 3 backend engineers
- Switch delivery core from PHP to Golang, improving performance triple than before.
- Third party data collector system optimize - Google Ads API
- Refactor and Deploy by GKE, improving performance twice than before and making system easy scaling.
awoo Inc. / Backend Engineer / Nov 2015 ~ Jun 2018
- Third party data collector system
- Job system (retry mechanism)
- Crawl Google/Yahoo search engine result page by Raspberry Pi.
- Switch crawler core from PHP to JS (CasperJS), fetching more JS render contents and simulating human operation.
- Crawl website HTML and do SEO analytic.
- Switch crawler core from PHP to JS (CasperJS), fetching more JS render contents.
- Crawl Bing Ads search volume.
- Fetch Google Ads API.
- SEO growth hacking tools - “Sweetdream(綺夢)”
- Data visualization: data source includes Google Analytics, Google Search Console, Google/Yahoo ranking, Google search volume.
- “CupidAds” prototype develop : Keyword selecting tools for Google Ads
- awoo 1st & 2nd intern training, junior engineer training
Work Experience
CHATISFY / Technical Consultant (Contract) / Jun 2022 ~ Mar 2023
- Planning software microservice & event-driven architecture.
- Assist in development and code review.
- Co-work with 1 backend & 1 frontend engineers & 2 site reliability engineer.
Karma Ksana / Senior Backend Engineer (Contract) / Mar 2022 ~ Jan 2023
- Build up OAuth 2.0 provider with Ory Hydra.
- Design and develop OAuth2.0 architecture system & other microservice.
- Discord bot development with GCP Pub/Sub.
- Co-work with 1 backend & 1 frontend engineer & 1 site reliability engineer.
Freelancer / Senior Backend Engineer / May 2021 - Present
- Magic7
- Service like Uber, passengers can reserve these vehicles go to and from between Hong kong and China through the application and track the location of the vehicles.
- Planning software cloud service architecture on AWS.
- Deployment on AWS (Elastic Beanstalk, Amazon RDS, Amazon ElastiCache).
- Use Stripe to accept payments, send payouts to driver.
- Use amap(高德地圖) to track the location of the vehicles.
- Assist in development and code review.
- Co-work with 1 backend & 1 frontend engineer.
- Taiwan Public Television Service Foundation
- Web backend development.
- Build up OAuth 2.0 provider with Ory Hydra.
- Design and develop OAuth2.0 architecture system & other microservice.
- Co-work with 1 site reliability engineer.
Origami Labs / Senior Backend Engineer / Feb 2020 ~ May 2021
- Cloud based walkie talkie system "OFLO"
- Refactor OFLO software architecture from outsourcing
- Design new microservice architecture for more stable, flexible and high availability
- Server architecture on GCP (GCE, GAE, Cloud SQL, Cloud Function, Cloud Tasks, Cloud Scheduler, Cloud Storage)
- Database design (MySQL, MongoDB)
- RESTful API services (NodeJS)
- Integrate GCP Speech-to-Text API in own system
- Integrate VOIP open source in own system
- Web development (console, web app) (NodeJS + VueJS + NuxtJS)
- Manage 2 web engineers, co-work with 2 android engineers
awoo Inc. / Backend Engineer (Team Leader) / Jun 2018 ~ Nov 2019
- AI tech based tagging system “Cupid”
- Team Leader & Scrum Master
- Manage 5 backend engineers, 1 frontend engineer
- Data Warehouse Architecture (Neo4j, MongoDB, MariaDB) & ETL
- Data layering to reduce dependency and to create different data for each application.
- Developed the ETL process between each layer and improved its performance 2-5 times than before.
- Designed database module to develop API or APP.
- Client product feeds
- Scheduled Fetches (XML, CSV) from SFTP or Google Storage.
- Provided solution of dynamic product feed that capable to different clients.
- Designed a mechanism to reduce the cost of GCP virtual machines and resulted in reducing 75% of the cost.
- Products RESTful API
- Cupid Data API (also can provide JS SDK using)
- ProductTag API : providing tags of product to the clients.
- Content API : providing product information of certain tags to the clients.
- SuggestionTag API : providing related tags operated by W2V model and awoo algorithm to the clients.
- Cupid Data FileExport : daily export product tag via file(XML) to the clients.
- Provide solution of cupid data exporting that capable to different clients.
- AI data labeling system for Data Labeling Associate.
- Email/SMS platform “Tigerfly” delivery core system optimize
- Collaborate with 3 backend engineers
- Switch delivery core from PHP to Golang, improving performance triple than before.
- Third party data collector system optimize - Google Ads API
- Refactor and Deploy by GKE, improving performance twice than before and making system easy scaling.
awoo Inc. / Backend Engineer / Nov 2015 ~ Jun 2018
- Third party data collector system
- Job system (retry mechanism)
- Crawl Google/Yahoo search engine result page by Raspberry Pi.
- Switch crawler core from PHP to JS (CasperJS), fetching more JS render contents and simulating human operation.
- Crawl website HTML and do SEO analytic.
- Switch crawler core from PHP to JS (CasperJS), fetching more JS render contents.
- Crawl Bing Ads search volume.
- Fetch Google Ads API.
- SEO growth hacking tools - “Sweetdream(綺夢)”
- Data visualization: data source includes Google Analytics, Google Search Console, Google/Yahoo ranking, Google search volume.
- “CupidAds” prototype develop : Keyword selecting tools for Google Ads
- awoo 1st & 2nd intern training, junior engineer training
