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.
Infrastructure & Reliability Engineer
Company: Circles – Jetpac
Type: Full‑time
About Jetpac
Jetpac, from Circles, is building a seamless way for travelers to stay connected globally. We offer eSIMs across 200+ destinations with a fast-growing consumer platform spanning web, mobile, and partner channels targeting the travel essentials segment.
We operate as a high-velocity product team. Small teams, fast decisions, and direct ownership. We ship continuously, iterate quickly, and measure what matters.
The Role
We’ve reached meaningful scale and are rebuilding key parts of the platform to support the next phase of growth. You’ll work closely with platform, backend, and product teams to ensure systems are reliably deployed, secure, and observable in production.
The way infrastructure is built and operated has fundamentally changed. Static scripts and manual operations don’t scale in AI-assisted engineering environments.
This role focuses on building and operating AI-accelerated infrastructure systems that are reliable by design.
You’ll work across cloud, backend, and runtime systems to ensure production readiness through:
reliable infrastructure and deployments
strong observability and debugging capabilities
secure-by-default system design
This is not a traditional DevOps role. You are accountable for how systems run in production, not just how they are deployed.
What You’ll Do
Build and operate infrastructure systems that are reliable, secure, and scalable across backend, web, and mobile platforms.
Own production infrastructure across cloud, networking, and runtime environments
Work with platform engineering to deploy and operate services reliably
Build and maintain infrastructure-as-code and CI/CD pipelines
Implement observability systems (logs, metrics, tracing) with meaningful alerting
Ensure system reliability and uptime, including incident response and postmortems
Apply infrastructure security best practices (IAM, secrets, network isolation, patching)
Improve system performance, cost efficiency, and operational simplicity
Use AI-assisted workflows to accelerate infrastructure development, debugging, and operations
Focus areas include:
Service deployment and runtime reliability
Observability across user journeys (browse → cart → checkout → payments)
Infrastructure performance, scaling, and cost optimization
Secure infrastructure foundations across environments
Required Skills and Experience
3–5 years of experience in infrastructure, SRE, or backend/platform-heavy roles
Strong hands-on experience with AWS cloud platforms
Experience with infrastructure-as-code (Terraform, CloudFormation)
Experience building and operating CI/CD pipelines and deployment systems
Hands-on experience with observability tools (Prometheus, Grafana, ELK, etc.)
Strong understanding of networking fundamentals and distributed systems
Experience implementing infrastructure-level security best practices
Comfortable debugging production issues across multiple layers (infra, backend, APIs)
Experience with AI-assisted workflows, including:
Using AI tools to generate infra code, debug issues, and automate workflows
Validating and refining AI-generated outputs for correctness and reliability
Building repeatable systems using AI without compromising production safety
Example Projects You’ll Work On
Build a production-grade observability stack across services and user flows
Design and improve deployment pipelines for faster and safer releases
Implement secure infrastructure foundations (IAM, secrets, network isolation)
Improve system reliability and reduce incident frequency across critical flows
Optimize infrastructure for performance and cost at scale
What Success Looks Like
Systems are reliable, observable, and easy to debug in production
Incidents are reduced, and recovery is fast when they happen
Deployments are safe, repeatable, and low-friction
Engineers trust infrastructure and can ship without operational bottlenecks
Security best practices are implemented by default, not as an afterthought
Hiring Process
Technical Intro Conversation with CTO
Live Practical Assignment (focused on test systems + AI usage)
Why Jetpac
High ownership, low bureaucracy
Real product impact at global scale
Fast-moving team with strong engineering culture
Flexible work setup across global teams
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.
