Founded in 2014, Circles is a global technology company reimagining the telco industry with its innovative SaaS platform, empowering telco operators worldwide to effortlessly launch innovative digital brands or refresh existing ones, accelerating their transformation into techcos.
Today, Circles partners with leading telco operators across multiple countries and continents, including KDDI Corporation, Etisalat Group (e&), AT&T, and Telkomsel, creating blueprints for future telco and digital experiences enjoyed by millions of consumers globally.
Besides its SaaS business, Circles operates three other distinct businesses:
- Circles.Life: A wholly-owned digital lifestyle telco brand based in Singapore, Circles.Life is powered by Circles’ SaaS platform and pioneering go-to-market strategies. It is the digital market leader in Singapore and has won numerous awards for marketing, customer service, and innovative product offerings beyond connectivity.
- Circles Aspire: A global provider of Communications Platform-as-a-Service (CPaaS) solutions. Its cloud-based Experience Cloud platform enables enterprises, service providers and developers to deliver and scale mobile, messaging, IoT, and connectivity services worldwide.
- Jetpac: Specializing in travel tech solutions, Jetpac provides seamless eSIM roaming for over 200 destinations and innovative travel lifestyle products, redefining connectivity for digital travelers. Jetpac was awarded Travel eSIM of the Year.
Circles is backed by renowned global investors, including Peak XV Partners (formerly Sequoia), Warburg Pincus, Founders Fund, and EDBI (the investment arm of the Singapore Economic Development Board), with a track record of backing industry challengers.
Job Title: Staff Engineer, Site Reliability Engineer (SRE)
About this role
This role would report to leader in Platform Engineering & Site Reliability Engineering
Builds resilient cloud systems, automates operations, and ensures high reliability through robust monitoring and performance optimization
Uses advanced tools (VPA, HPA.) for smart resource optimization ("rightsizing").
Creates reusable K8s components (Helm charts, Operators) to speed up deployments.
Automates resource adjustments to maximize performance and minimize costs.
Drives efficient, scalable Kubernetes infrastructure through automation and best practices.
Build and support CI/CD pipeline for various services and applications
What you'll do
Implement highly available, fault-tolerant applications and infrastructure, leveraging cloud-native technologies.
Establish robust monitoring, logging, and alerting systems for proactive issue detection and resolution.
Automate infrastructure management, deployment, and provisioning to enhance efficiency and consistency.
Manage incident response, conduct post-incident reviews, and implement preventative measures.
Mentor engineers and drive the evolution of teams towards a modern, collaborative SRE culture.
Uses advanced tools (VPA, HPA.) for smart resource optimization ("rightsizing").
Creates reusable Kubernetes components (Helm charts, stacks, operators) to speed up deployments and management of K8s.
Automates resource adjustments to maximize performance and minimize costs.
Drives efficient, scalable Kubernetes infrastructure through automation and best practices.
What we are looking for
10+ years experience with a majority of at least 6 years in Kubernetes / Site reliability experience in Kubernetes and end-to-end observability
Efficiently allocate resources, reduce costs, and enhance performance.
Streamline deployments and processes using Terraform, Ansible, Helm, and Kubernetes.
Implement observability solutions to track performance, detect issues, and ensure reliability.
Apply best practices for security, governance, and regulatory compliance.
Stay ahead with cutting-edge Kubernetes tools and best practices.
Work closely with development, security, and operations teams while mentoring junior engineers.
Conduct performance tuning, capacity planning, and load testing for efficiency.
Optimize cloud-native and hybrid architectures across OnPrem, AWS, OCI, and GCP.
Strong hands on experience with CI/CD tools such as Jenkins, Bitbucket, Gitlab
Good scripting capabilities: Bash / Python
Who you will work with
Co-Founders and HODs
Engineering Teams
External customers/MNOs and vendors
Circles is committed to a diverse and inclusive workplace. We are an equal opportunity employer and do not discriminate on the basis of race, national origin, gender, disability or age.
Data Protection and Privacy StatementBy submitting an application for this position, you, as the applicant, or your authorised representative(s), consent to Circles’ Candidate Data Protection and Privacy Policy. You also agree to the collection, use, and/or disclosure of your personal data by us solely for recruitment purposes as specified in the Policy. You acknowledge that you have read and understood the Policy, are aware of your rights regarding your personal data, and accept the terms relating to international data transfers, where applicable. You further understand that you may withdraw consent at any time, which may affect our ability to consider your application. In instances where your personal data or application is submitted by a third party, it is understood that such third party has been duly authorised by you to disclose the relevant personal data and provide consent on your behalf, and that you have been made aware of this Policy.
To all recruitment agencies: Circles will only acknowledge resumes shared by recruitment agencies if selected in our preferred supplier partnership program.
Please do not forward resumes to our jobs alias, Circles, employees or any other company location. Circles will not be held accountable for any fees related to unsolicited resumes not uploaded via our ATS.
