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Senior Site Reliability Engineer

Vacant position(s) at Optimizely (formerly Episerver) - Hanoi, Vietnam.
Position ID: #1966
Dept: Software Engineering
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SREs at Optimizely is focused on making us the most reliable, performant, and trustworthy Digital Experience Optimization platform ever. Our engineering teams have built data pipelines that process 10 billion events daily and applications that support powerful experimentation and collaboration workflows at scale. Our platforms are built on AWS and GCP. We use technologies such as Kafka, Samza, HBase, MySQL, and Postgres. We build and manage our systems using TravisCI, Jenkins, Docker, Kubernetes, Terraform, and Chef. We use a combination of managed and self-hosted approaches. This is a unique opportunity to lead the engineering organization in areas of standardized automated infrastructure and service provisioning and orchestration, service-oriented architectural excellence, and forward-looking planning and execution of large technical projects.

Knowledge and Experience

  • Documented experience working in a Linux Systems Administration or Linux Systems Support role in a multi-application/multi-server environment, preferably with virtual or Cloud-based systems utilities or software
  • Documented experience with load balancing and firewalls
  • Ability to build and monitor services on production servers in a public cloud environment, preferably Azure
  • Experience with ELK stack (Elasticsearch, Logstash and Kibana)
  • Experience in building CI/CD pipelines, ideally Azure DevOps, TeamCity, Jenkins
  • Knowledge of infrastructure as code tools, preferably Terraform
  • Knowledge of configuration as code tools, ideally Chef Infra
  • Should have robust systems analytics and recommendation experience in areas related to Operating Systems, Capacity and Hardware Sizing
  • Experience assessing the technical environment and recommending/designing customized Cloud-focused solutions to solve problems.

Job Responsibilities

  • Help tune performance and ensure high availability of infrastructure
  • Create tools to help the development team make the most out of the available infrastructure
  • Monitor alerts coming out of Optimizely’s selected products including Search and Navigation, Content Graph, and Product Recommendations, and coordinate with the Site Reliability Engineering team as necessary to take preventive or corrective action to resolve incidents, with a goal to minimize MTTA/R
  • Develop and maintain CI/CD pipeline for mentioned above products
  • Document your system knowledge as you acquire it over time and ensure critical system information is readily available to the development team for debugging/troubleshooting issues.


  • BS CS or equivalent industry experience


  • Displaying Technical Expertise
  • Critical Thinking
  • Testing and Troubleshooting
  • Demonstrating Initiative
  • Utilizing Feedback
Position ID: #1966
Dept: Software Engineering
Apply Now

About Optimizely

Optimizely is focused on unlocking digital potential and we are the recognized category leader in Digital Experience Platform (DXP) and created the category for A/B Testing and experimentation software. We have incredible customers – isn’t that one of the most important aspects of looking for your next job? Optimizely has over 9,000 brands from global organizations such as Visa, Sky, Yamaha, Wall Street Journal to tech innovators like Atlassian, DocuSign, FitBit and Zillow.

Not only are we financially sound and growing but we have unicorn status: Exceeded $300M in revenue in 2020, is profitable already, and has all strategic options ahead of itself. Optimizely continues to invest and addresses a market opportunity north of $30 billion, providing significant personal career growth opportunities.

We are an inclusive culture with a global team of 1200+ people across the US, Europe, Australia, and Vietnam. We blend European and American business culture with emphasis on teamwork, inclusion, and moving fast. People make the difference!

If you are looking to work on the next generation of digital technologies in a fast-paced, hyper-growth environment, apply! We’re just getting started...


  • 5 working days /week with flexible working time and no overtime;
  • Annual luxury Kick-off vacation;
  • International, professional, creative working environment and talented teams
  • Onsite opportunities in Europe and US;
  • Common cultural-sportive- art Clubs and activities, sponsored and/or supported by the Company (Ex: Football, GYM, Swimming, Guitar, English…).
  • Powerful workstation: Core i7-9700, 16-32 GB RAM, 02 x QHD 2560x1440 monitors (2K resolution);
  • 100% official salary during the probation period, 13th month salary, annual salary raise;
  • 12 days of annual leave and 3 days of company holidays (New Year eve 31/12, Junteenth day 18/6, Work Anniversary)
  • Up to 03 extra paid-leave days per year
  • A free “Hacking day” per month for self-studying and researching any IT-related subjects;
  • Social, Health and Unemployed Insurance are based on 100% Gross salary and fully paid by Company;
  • Extra bonus at $ 60 per special occasions (Birthday, Labour Day, National Day, Solar New year, Lunar New Year);
  • Lunch allowance at $30 per month;
  • Baby allowance for a child under 03 years old is $ 12 per month;
  • AON Premium Healthcare Insurance package for employees and their children up to 18 years old.
  • Daily various foods, drink, and seasonal fresh fruits;