← ExitSystem Design

System Design: settlement at 10x scale

AO
Amina OkaforInterviewer
speaking
Y
YouCandidate
DK
Dana KimObserver
muted

Presence preview - real video/audio is not connected in this MVP.

Agenda

2/4 done · 35 min planned

Artifacts

Artifact-aware: this room is about real work, not an empty call.

  • OTOpenThunderRoom only

    payments-svc - Architecture & Risk Report

    OpenThunder mapped 3 hotspot modules, 2 high-risk change areas, and the settlement flow. Risk score 68/100.

    architecture_report · from OpenThunder

  • IDESkillsTech IDERoom only

    acme/payments-svc @ main

    Live repo opened from SkillsTech IDE. 41k LOC, TypeScript + Postgres.

    repo · from SkillsTech IDE

  • STTSkills Tech TalkPrivate

    Architecture Defense - STT Drill

    Skills Tech Talk drill on explaining tradeoffs under pressure. Communication baseline 3.4/5.

    stt_drill · from Skills Tech Talk

Recording & transcription

Visible to everyone. Never silent.

RecordingOff
Live transcriptionOff

Mock controls - no real media is captured in this MVP. Transcription is orchestrated by Runtime; Rooms never records silently.

Rubric · Architecture Defense

From Skills Tech Talk · tap to score

  • Problem framing

    -

    States constraints, scale, and non-goals before designing.

  • Tradeoff reasoning

    -

    Compares options and defends the choice out loud.

  • Failure modes

    -

    Names what breaks and how the design degrades.

  • Communication clarity

    -

    Explains complex ideas an interviewer/exec can follow.

Notes

Decisions, risks, strengths & action items become proof

  • Strength

    Clear articulation of the consistency/latency tradeoff.

    Fri, Jul 3, 5:54 PM

  • Risk

    Dedupe key collision under retry storms - needs a stronger key.

    Fri, Jul 3, 5:48 PM

  • Decision

    Split settlement into an idempotent ingress queue + async reconciler.

    Fri, Jul 3, 5:42 PM

Your notes, agenda, and scores are saved locally and flow into the summary & proof.