VIET HUNG NGUYEN
SENIOR DEVOPS ENGINEER AND PYTHON MENTOR
Blog (Vietnamese): http://www.familug.org/
MAIN TECHNICAL SKILLS
Language: Python, Go, SQL, Bash, Elixir, Elm
Configuration management: SaltStack, Ansible
CI: Jenkins, GitLabCI, CircleCI, TravisCI, ConcourseCI
OS: Ubuntu, OSX, ArchLinux, Windows
SCM: git, GitLab, GitHub
Cloud: AWS, DigitalOcean, OpenStack
Container: Docker, Kubernetes
Monitoring: DataDog, Graphite & DIamond, Grafana & InfluxDB, PagerDuty, Shinken
Logging: Graylog2, Scalyr, ELK
Hanoi University Of Science and Technology
Engineer, Applied Mathematic and Informatic, 2013
Grab | Lead Engineer - Cost Optimization team
Apr 2020 | HoChiMinh Office, Singapore based company
- Leading the process planning, purchasing, managing EC2/RDS/ElastiCache Reserved Instances (RIs), SavingsPlans, worked directly with AWS TAMs, and supports for exchanging under-utilized RIs, which helped save Grab millions dollar on AWS Cloud resources.
- Provides expertises to teams to understand and decipher their AWS bills.
- Drive increases adoption of AMD EC2 instances (and other new EC2 generations) via Terraform linters/Terraform default template, which is more cost-effective compared to older generation instances. I.e: for t3a, usage hours widely increased 20+ times.
- Designed and developed GrabTrustedAdvisor, the tool helps to deliver enhanced AWS Trusted Advisor "advice" about underutilized resources (EC2, RDS, ELB, DynamoDB, ElastiCache,...) to services' owners with additional information for making decisions for downsizing or shutting down the resources.
- Developed tools/alert helps teams detecting cost abnormally changes.
Grab | Senior SysOps Engineer / SRE
Nov 2017 - Mar 2020 | HoChiMinh Office, Singapore based company
- Developed a system for managing EC2 Capacity Reservation, ensuring 75% EC2 instances have Capacity Reservation across all GrabTaxi AWS accounts. This helps reduce the number of failures when scaling out services, ensuring the continuity of business.
- Leading the AWS resource tagging process, which helps teams view their cost by services, tech families or particular resources.
- Developed script for automating Azure subscription creation process.
- Greenfield: co-design and implemented 1-click new service creation solution with software team to create new service with everything needed in 1 hour.
- Released Grab cost dashboard helps engineers view and understand their services infra cost (including AWS, Azure, DataDog and ELK log clusters).
- Created NIA service, backend for Engineer Onboarding tool, which automates permission granting process for Engineers.
- Leading automation/linters for Terraform code base,
- Leading AWS Lambda pipeline design and tooling / training / consulting, integrated with Terraform, helps engineers create new Lambda functions via one script.
- Created GrabViz service: Visualizing Grab microservices architecture based on VPC Flowlog and Security Groups, helps detect staled Security Groups, misconfigurations, see traffic ratio
- Developed a Slack chatbot - integrated with AWS, JumpCloud, Scalyr, DataDog APIs … to automate onboarding new engineer tasks.
Unblockapp (the company that acquired Robotinfra)| Senior DevOps Engineer
Jan 2016 - Apr 2017 | Remotely, Malaysia based company
- Leading SaltStack formulas development, develop formulas for deploying Golang microservices.
- Design and build CI system, code quality assurance tools for Golang microservices.
- Design and build CI system for Django frontend app.
- Setup CI to build multiple platforms apps (Windows, Linux, Android).
- Deploy staging and production (on DigitalOcean) for Unblockapp.
- Prototype PoC for Docker based deployment for Golang microservices with Kubernetes, Concourse CI, Docker registry, Influxdb, EFK stack on DigitalOcean and Google Cloud (GKE).
- Setup PoC Kubernetes cluster manually on DigitalOcean with CoreOS and etcd, and deploy other one using Kargo (Ansible based) to deploy the dev cluster on DigitalOcean.
Robotinfra | Development director, Vietnam
Jan 2015 - Dec 2015 | Remotely, Hongkong based company.
- Coordinate Robotinfra.com development process.
- Research and develop Go application for new Robotinfra product.
- Co-design and develop testing system for SaltStack formulas on multiple slaves Jenkins + SaltStack cloud on DigitalOcean.
- Automate deployment and daily maintain whole infrastructure, namely email (Postfix+Dovecot+Amavis+OpenDKIM+OpenLDAP+RoundCube...), logging (Graylog2+Elasticsearch), graph (graphite+diamond, influxdb + grafana), monitoring (Shinken+NRPE), Git (GitLab/GitHub), CI (Jenkins, Concourse), task management (Youtrack, OpenERP), internal chat (Ejabberd, Mattermost), DNS authoritative and caching (Bind9), error monitor (Sentry)...
PyMi.vn | Organizer and mentor
May 2015 - now | Hanoi, Vietnam
- Designing course and teaching Python 2.7/3.5, Git, using GitLab.com for code reviewing, GitLab CI for CI.
- Built jobs.pymi.vn, a Python job aggregator which crawls data from all popular Vietnamese job sites. Uses Scrapy for crawling, Flask for API processing and Echo Go framework for website, deployed on Amazon EC2.
Robotinfra | Senior Devops
Apr 2013 - Dec 2014 | Remotely, Hongkong based company.
- Writing SaltStack formulas for automating deploying a wide range of software (both open/close sources).
- Setup, extend and improve the continuous integration system for testing 100+ software deployment on all supported Ubuntu LTS versions. In charge of the whole testing process for Robotinfra.com product.
- Code (Python, Bash) and Salt formula review/merging for all changes made by all developers (on GitLab).
- Contribute bug fixes for SaltStack and Diamond and a lot of other Python open source software.
- Developing Python library and tools for internal using.
- Setup and maintaining email system (postfix + dovecot + openLDAP + amavis + spamassassin, RoundCube), metric system (Diamond + graphite), centralized logging system (Graylog2, rsyslog), CI system (Jenkins) for internal using and for clients.
- Troubleshooting complex system problems.
VCCloud, VCCorp | System Engineer, Python developer
June 2012 - April 2013 | Hanoi, Vietnam
- Developed Linux network gateway software, which supports high availability and load balancing. Which serves all offices of VCCorp. (Core python + iptables/Linux utilities)
- Developed and managed the backend for the VPN system. (web.py + OpenVPN)
- Automate OpenStack and infrastructure installation with configuration management software SaltStack.
- Setup and managing monitoring system (graphite), logging system (graylog2), CI system (Jenkins) which serves both public and private clouds.
- Guide developers write custom Diamond modules for internal use.
- Deployed private cloud and public cloud with SaltStack on 30+ high end servers.
- Training developers/sysadmin on using git, SaltStack.
- Troubleshooting, tuning cloud components configurations and writing functional tests for cloud system.
APSTech | Android developer
Jan 2012 - June 2012 | Hanoi, VietNam
- Developed features for QuickSettings, an application for quickly accessing phone settings, switch on/off phone feature by just one click.
- Developed modules in CallBilling, an application for calculating mobile cost.
- Developed API (PHP) and Android application for Euro 2012 for local users.
- Organizing SaltStack meetup in Vietnam http://www.meetup.com/VietNam-SaltStack-Meetup/