Senior Software Engineer - Platform; AI-Accelerated - Jetpac

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.

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 nature of software development has changed significantly in the last year, and we’ve evolved how we build products. Our platform team builds and scales the core systems that power Jetpac’s consumer experience across 200+ countries.

• think in systems, not just features
• operate with high ownership
• can define what “good” looks like across reliability, performance, and developer velocity

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 engineers, product, design, and business teams to deliver foundational capabilities that unlock entire categories of product development.

• Build and scale core consumer platform systems across web and backend
• Own features end‑to‑end: design, build, deploy, and iterate
• Use AI‑assisted workflows across coding, testing, debugging, and review; structure workflows where AI can reliably generate and improve code
• Identify and solve bottlenecks in performance, reliability, and developer productivity
• Build shared components and internal tooling to improve team velocity
• Improve observability, debugging, and system reliability

• API performance and backend systems
• Caching and data access patterns
• Experimentation, analytics, and event pipelines
• Localization and global readiness

• 3 –5 years of professional software engineering experience
• Strong backend or full‑stack fundamentals with experience building production systems
• Experience designing APIs, services, and scalable data models
• Strong product judgment able to balance speed, quality, and long‑term maintainability
• Comfortable working in modern stacks (Python / Go)
• Experience with AWS cloud infrastructure

• Hands‑on experience using AI‑assisted or agent‑based development workflows in real projects
• Ability to…