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.

Sr Software Engineer - Platform (AI-Accelerated)

Company: Circles.Life – 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

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.

This role is for engineers who:

• 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.

What You’ll Do 

• 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

Focus areas include:

• API performance and backend systems

• Caching and data access patterns

• Experimentation, analytics, and event pipelines

• Localization and global readiness

Required Skills and Experience

• 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 

Critical requirement:

• Hands-on experience using AI-assisted or agent-based development workflows in real projects 

• Ability to review, debug, and improve agentic AI-generated code

• Understanding of how to structure workflows so AI-generated output is reliable and production-ready

Familiarity with:

• Postgres, Redis or similar data stores

• Caching and performance optimization techniques

• Authentication and identity systems

• Observability and monitoring tools

• Event pipelines and analytics systems

Example Projects You’ll Work On

• Redesign and scale the cart and checkout system to support multi-product flows and high concurrency

• Build a shared platform layer for rewards, pricing, and promotions across multiple product lines
  Improve page load performance and API latency across global markets

• Design observability systems to detect and debug issues in real time

• Build internal workflows where AI systems assist in generating, testing, and validating production code
  Reduce development cycle time by creating repeatable AI-assisted engineering workflows

• Evolve platform architecture to support new product categories and integrations

What Success Looks Like

• You deliver high-quality features in days, not weeks

• You reduce system complexity while improving performance and reliability

• You proactively identify and solve bottlenecks
  You increase overall team velocity through better systems and workflows

Hiring Process

• Technical Intro with CTO 

• Live Practical Assignment (build + explain your approach, including 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.

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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.