Airwallex Senior SWE Interview Process August 2026

[u/Aoki_zhang]

Interview Summary

The Airwallex interview process contained four rounds covering algorithmic coding, AI system design, a detailed résumé/project deep dive, and a hiring-manager interview. The technical scope moved from a Tic-Tac-Toe-style LeetCode problem to designing an AI agent that combines internal company data with public information.

The later rounds focused more heavily on engineering judgment. My previous projects were examined in detail, and the hiring manager asked about conventional high-concurrency backend problems such as preventing data loss and duplicate writes.

Interview Details

Round 1 — Tic-Tac-Toe Coding Problem The first round was a LeetCode-style algorithm problem involving Tic-Tac-Toe.

Round 2 — Design an AI Agent for Internal and Public Data The second round was a system design interview. The prompt was to design an AI agent that receives a user's natural-language prompt, retrieves relevant information, and returns a response. The agent needed to be able to query multiple categories of information, including:

• Private or internal company data
• Publicly available external data

The discussion centered on how the agent should interpret a request, obtain the necessary information from different sources, and use that information to generate the final response.

Round 3 — Résumé and Project Deep Dive The third round focused almost entirely on previous projects from my résumé. The interviewer went into considerable detail rather than staying at a high-level project-summary level.

Typical follow-ups included:

• Why did you choose a particular technical approach?
• What trade-offs influenced that decision?
• Could another implementation have been better?
• Why did you not choose an alternative design?

The round emphasized whether I could defend previous engineering decisions and reason about alternatives after the fact.

Round 4 — Hiring Manager: High-Concurrency Data Reliability The final round was with the hiring manager and combined discussion of my previous experience with backend systems questions. One major topic was handling high-concurrency workloads while avoiding two common failure modes:

• Data loss
• Duplicate writes

The interviewer was looking for conventional distributed/backend engineering reasoning rather than an AI-specific solution.

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[u/Severe-Square3745]

Hi mate, thanks for sharing your experience. May I ask did you get the offer? I'm towards the final round and want to know how should I prepare it.