Interview room
Design data contracts between teams: schema, freshness, volume, tests, enforcement, versioning. Slack posts are not contracts.
Basics
Contract contents; CI+runtime+process enforcement; semver for breaks; consumer registration.
Prompt
Versioned contracts, producer CI, consumer deps, catalog discovery, breach alerts.
Good
Example contract; advisory→hard rollout; registry of consumers; emergency process.
Clarify/scope
Hard vs advisory; sync vs async products; incentives.
Scoring lens: Data Contracts Between Teams
Interviewers reward incident-first teaching, a clear control loop, and named owners. Tool logos without that loop score poorly.
Weak vs strong answers on Data Contracts Between Teams
Weak: list products. Strong: tell the failure story, define the mechanism, draw the path, state rollout and monitors.
Scope control
Say what is out of scope for v1. Come back only if follow-ups demand it. This is a seniority signal for Data Contracts Between Teams.
Clarifying then committing
Ask a few high-use questions about SLAs, owners, and scale, then sketch. Endless questions without a diagram look evasive.
Contract registry UX
Browse by domain, see version, SLA, consumers, and recent breaches. Click-through to CI and runtime monitors. Discoverability is what makes contracts real.
Dual-run cost control
Major versions dual-run for a bounded window with a dated EOL. Infinite dual-run is how platforms pay forever for fear.
Emergency break ritual
Security/legal Sev-1 may force an incompatible change. Require IC approval, major bump, consumer blast, and postmortem. Do not normalize quiet breaks.
Interview framing detail 1
For lb-sd-30, spend the first minutes making the problem concrete: who gets hurt when this fails, what SLA is implied, and what is explicitly out of scope. Then teach the prerequisite concept before proposing boxes. A candidate who names vendors first usually loses the plot. Write two clarifying questions on the board and answer them with assumptions if the interviewer shrugs. Keep the first diagram small enough to redraw when a follow-up changes a constraint.
Interview framing detail 2
For lb-sd-30, spend the first minutes making the problem concrete: who gets hurt when this fails, what SLA is implied, and what is explicitly out of scope. Then teach the prerequisite concept before proposing boxes. A candidate who names vendors first usually loses the plot. Write two clarifying questions on the board and answer them with assumptions if the interviewer shrugs. Keep the first diagram small enough to redraw when a follow-up changes a constraint.
Interview framing detail 3
For lb-sd-30, spend the first minutes making the problem concrete: who gets hurt when this fails, what SLA is implied, and what is explicitly out of scope. Then teach the prerequisite concept before proposing boxes. A candidate who names vendors first usually loses the plot. Write two clarifying questions on the board and answer them with assumptions if the interviewer shrugs. Keep the first diagram small enough to redraw when a follow-up changes a constraint.
Interview framing detail 4
For lb-sd-30, spend the first minutes making the problem concrete: who gets hurt when this fails, what SLA is implied, and what is explicitly out of scope. Then teach the prerequisite concept before proposing boxes. A candidate who names vendors first usually loses the plot. Write two clarifying questions on the board and answer them with assumptions if the interviewer shrugs. Keep the first diagram small enough to redraw when a follow-up changes a constraint.
Interview framing detail 5
For lb-sd-30, spend the first minutes making the problem concrete: who gets hurt when this fails, what SLA is implied, and what is explicitly out of scope. Then teach the prerequisite concept before proposing boxes. A candidate who names vendors first usually loses the plot. Write two clarifying questions on the board and answer them with assumptions if the interviewer shrugs. Keep the first diagram small enough to redraw when a follow-up changes a constraint.
Interview framing detail 6
For lb-sd-30, spend the first minutes making the problem concrete: who gets hurt when this fails, what SLA is implied, and what is explicitly out of scope. Then teach the prerequisite concept before proposing boxes. A candidate who names vendors first usually loses the plot. Write two clarifying questions on the board and answer them with assumptions if the interviewer shrugs. Keep the first diagram small enough to redraw when a follow-up changes a constraint.