SDE, AWS Network Firewall (Seattle)

Interview prep for an SDE role building AWS Network Firewall, the distributed traffic-inspection and filtering service that defends internet-facing customer applications at cloud scale.

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Likely format

Amazon's standard SDE loop: online assessment, then phone/virtual interviews covering coding, system design, and Leadership Principles behavioral questions.

What this interview tests

Distributed systems design for high-throughput traffic inspection/filtering
Production troubleshooting and root-cause analysis (on-call)
Coding in Java/Python/C++ with strong SDLC discipline
Reliability and scaling tradeoffs in security-critical infrastructure
Cross-team collaboration on new service features

Common question themes

Design a scalable packet inspection or traffic filtering system

Walk through debugging a production incident in a distributed service

Coding exercise in Java, Python, or C++

How do you balance shipping fast with maintaining reliability/security

Tell me about a time you drove a technical decision with cross-functional partners

How candidates describe it

Real Software Development Engineer interview stories — retold from candidates' public write-ups, with sources.

Amazon · SDE I (New Grad, MS CS)Offer

Amazon SDE 1 new grad loop: three online assessments, three interviews, offer in five days

A master's new grad went through Amazon's full three-part online assessment and three 45-minute virtual interviews. Every round opened with Leadership Principles questions before the coding began, and the offer landed within five business days.

Interviewed October 2019 · Seattle, WA, US

Amazon · SDE I (New Grad)Offer

Amazon SDE 1 new grad interview: one OA, four back-to-back onsite rounds, offer

A fresher found the posting through a LinkedIn connection, cleared the OA within a week of applying, and faced a six-hour virtual onsite: four one-hour rounds where every behavioral answer drew three to four follow-up questions.

Interviewed January 2021 · Seattle, WA, US

Amazon · SDE INo offer

Amazon SDE I Interview Experience: Global Selling Team, 2022

A LinkedIn referral bypassed Amazon's usual online assessment for this SDE I candidate, who then worked through a telephonic DSA screen and two technical rounds pairing coding problems with Amazon Leadership Principles questions before receiving no further response.

Interviewed March 2022 · Not specified

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