Principal Software Engineer, Network

Airwallex; Singapore; On-site; SGD 210,000 - 270,000; Full time

Job summary

Airwallex is seeking a seasoned Principal Engineer to own Airwallex’s edge networking stack including API gateway, DNS, CDN, and Global Accelerators. You’ll lead architecture, governance, and security at a global scale.

Collaborate with InfoSec and platform teams to implement DDoS protection, rate limiting, and QoS enforcement across multi-cloud environments. This role blends security with developer productivity in a fast-paced fintech setting.

Qualifications

• Experience in cloud-native edge networking (gateway, DNS, CDN, GA, firewalls).
• Hands-on with SDN concepts and related tools.
• Knowledge of hybrid/multi-cloud patterns and traffic engineering at scale.

Responsibilities

• Own the Edge Network Stack architecture and evolution.
• Define policy for route registration, approval, and change management.
• Partner with InfoSec to design DDoS protection, rate limiting, and WAF policies.
• Build end-to-end tooling for exposing public APIs with governance.
• Enforce reliability, QoS goals, and cross-region performance.

Skills

Edge networking

API gateway

DNS/CDN

Security governance

QoS/rate limiting

Cloud/networks

Kubernetes traffic

OpenDaylight/OpenSrc

Envoy

NGINX/OpenResty

Cloudflare/AWS/GCP

Tools

OpenDaylight

Envoy

NGINX/OpenResty

Kong

Apisix

Cloudflare

AWS

GCP

Job description

Location

SG - Singapore

Employment Type

Full time

Location Type

On-site

Department

EngineeringTechnology Platform

About Airwallex

Airwallex is the only unified payments and financial platform for global businesses. Powered by our unique combination of proprietary infrastructure and software, we empower over 150,000 businesses worldwide – including Brex, Rippling, Navan, Qantas, SHEIN and many more – with fully integrated solutions to manage everything from business accounts, payments, spend management and treasury, to embedded finance at a global scale.

Proudly founded in Melbourne, we have a team of over 1,800 of the brightest and most innovative people in tech across 26 offices around the globe. Valued at US$6.2 billion and backed by world-leading investors including Visa, Airtree, Blackbird, Sequoia, DST Global, Greenoaks, Salesforce Ventures, Lone Pine, and Square Peg, Airwallex is leading the charge in building the global payments and financial platform of the future. If you’re ready to do the most ambitious work of your career, join us.

Attributes We Value

We hire successful builders with founder-like energy who want real impact, accelerated learning, and true ownership. You bring strong role-related expertise and sharp thinking, and you’re motivated by our mission and operating principles. You move fast with good judgment, dig deep with curiosity, and make decisions from first principles, balancing speed and rigor.

You're humble and collaborative; turn zero‑to‑one ideas into real products, and you “get stuff done” end‑to‑end. You use AI to work smarter and solve problems faster. Here, you’ll tackle complex, high‑visibility problems with exceptional teammates and grow your career as we build the future of global banking. If that sounds like you, let’s build what’s next.

About the Role

We’re looking for a seasoned Principal Engineer to take full ownership of Airwallex’s edge networking stack—including API gateway, CDN, DNS, Global Accelerators, and traffic control services. This is a high-impact P5 architect role at the intersection of platform engineering, security, and product velocity. You’ll define the blueprint, lead implementation, and enforce governance for how all external traffic reaches and interacts with our platform globally.

Responsibilities

Own the Edge Network Stack

• Design and evolve the architecture for Airwallex's external traffic stack including:

  • API Gateways (routing, filtering, throttling)

  • DNS services (global resolution & routing)

  • CDNs (caching strategies and invalidation)

  • Global Accelerators (latency and route optimization)

Define and Enforce Border Security

• Partner with InfoSec to design and operationalize:

  • DDoS protection, bot mitigation, and anomaly detection (e.g., Cloud Armor, WAF)

  • Rate limiting and QoS policy enforcement for prioritized customer/partner APIs

  • Firewall rule governance and bad actor prevention mechanisms

  • Intrusion Prevention and Auth mechanisms at the border

Policy-Driven API Route Management

• Build end-to-end processes and tooling for how engineers expose public APIs:

  • Define policy and controls for route registration, approval, and change management

  • Work with platform teams to enforce compliance across microservices and gateways

  • Contribute to internal tools for observability, access review, and lifecycle auditing

Enable Global-Scale, Secure Performance

• Establish reliability and quality of service (QoS) goals for critical paths (e.g., payments, onboarding, auth)

• Design for hybrid/multi-cloud edge strategy and backbone traffic replication

• Tune latency, failover, and availability posture across regions

What We’re Looking For

Technical Skills

• Deep experience in cloud-native edge networking (API Gateway, DNS, CDN, GA, firewalls)

• Proficiency with SDN concepts and tools (e.g., OpenDaylight, Envoy, NGINX/OpenResty, Kong, Apisix)

• Familiar with Cloudflare, AWS or GCP Cloud Networking, techniques

• Knowledge of hybrid/multi-cloud patterns and traffic engineering at scale

• Hands-on with cloud firewall systems, WAF, rate limiting, and bot detection

Strategic Capabilities

• A security-aware mindset with ability to balance protection and developer experience

• Experience defining cross-team processes and governance frameworks

• Strong communication skills and ability to lead across engineering and security teams

Bonus

• Experience supporting financial or regulated workloads

• Familiarity with Kubernetes traffic management frameworks

Equal opportunity

Airwallex is proud to be an equal opportunity employer. We value diversity and anyone seeking employment at Airwallex is considered based on merit, qualifications, competence and talent. We don’t regard color, religion, race, national origin, sexual orientation, ancestry, citizenship, sex, marital or family status, disability, gender, or any other legally protected status when making our hiring decisions. If you have a disability or special need that requires accommodation, please let us know.

Airwallex does not accept unsolicited resumes from search firms/recruiters. Airwallex will not pay any fees to search firms/recruiters if a candidate is submitted by a search firm/recruiter unless an agreement has been entered into with respect to specific open position(s). Search firms/recruiters submitting resumes to Airwallex on an unsolicited basis shall be deemed to accept this condition, regardless of any other provision to the contrary. If you are approached by someone claiming to represent Airwallex, please verify with our team.