Sungho Spark, Developer in Lincoln City, OR, United States
Sungho is available for hire
Hire Sungho

Sungho Spark

Verified Expert  in Engineering

DevOps Engineer and Software Developer

Lincoln City, OR, United States
Toptal Member Since
June 22, 2022

Sungho is a DevOps engineer with more than 12 years of experience in different companies, from mid-size startups to well-known brands. He specializes in container orchestration, infrastructure as code, and deployment pipeline automation (CI/CD). His preferred tool stack consists of AWS, Terraform, Kubernetes, and Helm. Sungho is proficient in configuration management tools such as SaltStack, Ansible, and Chef.

Amazon Web Services (AWS), Kubernetes, Terraform, Teleport, Helm, Terragrunt
Amazon Web Services (AWS), Terraform, Jenkins, Kubernetes, Terragrunt
Amazon Web Services (AWS), Kubernetes, Kubernetes Operations (kOps), Helm...




Preferred Environment

Amazon Web Services (AWS), Kubernetes, Helm, Terraform, Docker, SaltStack, Linux

The most amazing...

...automation I've built is codifying and orchestrating entire stack of infrastructure and application from the ground up for BloomHealth.

Work Experience

Senior DevSecOps

2020 - PRESENT
  • Improved infrastructure security and processes toward SOC 2 and HIPAA compliance.
  • Consulted various teams with DevOps needs with a security focus.
  • Automated the CI/CD process for Terraform codebase using GitHub Actions.
  • Won the 2022 hackathon with Apple Watch health data integration with the Calm app.
Technologies: Amazon Web Services (AWS), Kubernetes, Terraform, Teleport, Helm, Terragrunt

Senior Site Reliability Engineer

2019 - 2020
  • Modularized and automated Terraform codebase using Terragrunt and GitHub Actions.
  • Assisted QA engineers in further automating the test suites and improved the reliability of the CI/CD process.
  • Maintained Kubernetes-centric infrastructure under tight security requirements and compliance.
Technologies: Amazon Web Services (AWS), Terraform, Jenkins, Kubernetes, Terragrunt

Senior Site Reliability Engineer

2017 - 2019
  • Migrated the production load of FlightStats to Kubernetes with HA, autoscaling, and centralized logging and monitoring.
  • Developed the deployment pipeline written as a Jenkins file featuring pull request analysis, automated tests, automated staging deployment, and blue-green deployment for the production environment for zero-downtime deployment.
  • Transformed manually managed AWS environment into automated infrastructure with Terraform and Serverless Framework.
Technologies: Amazon Web Services (AWS), Kubernetes, Kubernetes Operations (kOps), Helm, Terraform, Jenkins Pipeline, SaltStack, Traefik

Senior DevOps Engineer

2016 - 2017
  • Evaluated new tools and provided reference architecture with automation to help other teams adapt.
  • Developed CI/CD pipeline automation for AWS Lambda, API Gateway, and ECS with Python.
  • Automated Docker Swarm cluster creation and CI/CD for containers with SaltStack.
Technologies: Amazon Web Services (AWS), Kubernetes, Docker Swarm, Amazon Elastic Container Service (Amazon ECS), Serverless, AWS Lambda, Amazon API Gateway

DevOps Engineer | CloudOps Engineer

2014 - 2016
  • Maintained and improved existing AWS infrastructure provisioned with Chef and RightScale.
  • Designed and implemented more automated and event-driven infrastructure from scratch with CloudFormation, SaltStack, and Docker. From VPC to Route 53 entries, everything was automated.
  • Researched and implemented new tools such as OpenVPN, Elasticsearch, and AWS RDS with security requirements and restrictions under HIPAA compliance.
Technologies: Amazon Web Services (AWS), Docker, SaltStack, AWS CloudFormation, Python

Ruby DevOps Engineer

2014 - 2014
Best Buy
  • Managed Best Buy's software development lifecycle tools, including OpenStack infrastructure, Atlassian stacks, Artifactory, and Jenkins.
  • Used Opscode Chef for configuration management, Jenkins for continuous integration, OpenStack for testing and development environment, and AWS for production environment.
  • Consulted various teams in Best Buy to enable Agile methodology for specific team needs.
Technologies: Amazon Web Services (AWS), OpenStack, Chef, Ruby, Jenkins, Atlassian Suite

Infrastructure Engineer

2012 - 2014
Black Knight
  • Managed security vulnerabilities of 2,500 servers in the Windows Server environment.
  • Automated the Windows Server security patching and reporting.
  • Reduced reported vulnerability counts by more than half within a year.
Technologies: C#, Windows Server

Helm Upgrade for Calm
Helm is a package and deployment management tool for the Kubernetes ecosystem.

Upgrading Helm 2 to Helm 3 was a major task that removed the server component hosted inside the Kubernetes cluster with god mode permission, which was a security concern. This project describes step-by-step upgrade procedures and potential issues during the upgrade process.
2007 - 2011

Bachelor's Degree in Computer Engineering

University of Minnesota - Minneapolis, MN, USA

AUGUST 2006 - AUGUST 2008

Cisco Certified Network Associate



Jenkins Pipeline, Terragrunt


Helm, Terraform, Jenkins, SaltStack, Chef, Atlassian Suite, AWS CloudFormation, Docker Swarm, Amazon Elastic Container Service (Amazon ECS), Traefik


Amazon Web Services (AWS), Kubernetes, Docker, Linux, Windows Server, OpenStack, AWS Lambda


Python, C#, Ruby


Programming, Networking, Serverless, CI/CD Pipelines, Amazon API Gateway, Kubernetes Operations (kOps), Teleport

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.


Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring