AceStack AI Open interactive practice

Public task directory

Technical interview practice tasks

Every entry below is a crawlable link to a unique public task page. This directory complements the interactive filters and keeps the complete catalog connected through standard pagination.

Page 372 of 386 · 18,491 tasks

System Design · Hard · 45 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 500 dashboard

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Emphasize reliability, auditability, migrations, and.

System Design · Hard · 45 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 20M jobs per day,

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Emphasize reliability, auditability, migrations, and.

System Design · Hard · 45 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 5M payment events per

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Emphasize reliability, auditability, migrations, and.

System Design · Hard · 45 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 1M workspaces, 20M

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Emphasize reliability, auditability, migrations, and.

System Design · Hard · 45 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 500K

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Emphasize reliability, auditability.

System Design · Medium · 35 min

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Balance product velocity, measurable user impact, and maintainable architecture. Scale:

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Balance product velocity, measurable.

System Design · Medium · 35 min

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 10K

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Balance product velocity, measurable user.

System Design · Medium · 35 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 500M events per month,

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Balance product velocity, measurable user impact, and maintainable.

System Design · Medium · 35 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 5M documents, 100K

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Balance product velocity, measurable user impact, and.

System Design · Hard · 45 min

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 2M metric

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Balance product velocity, measurable user impact, and.

System Design · Hard · 45 min

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 100K

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Balance product velocity, measurable user.

System Design · Hard · 45 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 100K

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Balance product velocity, measurable user.

System Design · Medium · 35 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 500 dashboard

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Balance product velocity, measurable user impact.

System Design · Hard · 45 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 20M jobs per

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Balance product velocity, measurable user impact.

System Design · Hard · 45 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 5M payment events

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Balance product velocity, measurable user impact, and.

System Design · Medium · 35 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 1M workspaces, 20M

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Balance product velocity, measurable user impact, and.

System Design · Hard · 45 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Balance product velocity, measurable user impact, and maintainable architecture. Scale: 500K

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Balance product velocity, measurable user.

System Design · Medium · 35 min

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Assume scope changes and stakeholder alignment are part of the interview. Scale: 50M

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Assume scope changes and stakeholder.

System Design · Medium · 35 min

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Assume scope changes and stakeholder alignment are part of the interview. Scale: 10K flags, 30K

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Assume scope changes and stakeholder.

System Design · Medium · 35 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Assume scope changes and stakeholder alignment are part of the interview. Scale: 500M events per month,

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Assume scope changes and stakeholder alignment are part of the.

System Design · Medium · 35 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Assume scope changes and stakeholder alignment are part of the interview. Scale: 5M documents, 100K

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Assume scope changes and stakeholder alignment are part of.

System Design · Hard · 45 min

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Assume scope changes and stakeholder alignment are part of the interview. Scale: 2M metric streams, 20K

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Assume scope changes and stakeholder alignment are part.

System Design · Hard · 45 min

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Assume scope changes and stakeholder alignment are part of the interview. Scale: 100K tenants, 50M

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Assume scope changes and stakeholder alignment.

System Design · Hard · 45 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Assume scope changes and stakeholder alignment are part of the interview. Scale: 100K daily

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Assume scope changes and stakeholder.

System Design · Medium · 35 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Assume scope changes and stakeholder alignment are part of the interview. Scale: 500 dashboard widgets

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Assume scope changes and stakeholder alignment are.

System Design · Hard · 45 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Assume scope changes and stakeholder alignment are part of the interview. Scale: 20M jobs per day,

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Assume scope changes and stakeholder alignment are.

System Design · Hard · 45 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Assume scope changes and stakeholder alignment are part of the interview. Scale: 5M payment events per day,

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Assume scope changes and stakeholder alignment are part of.

System Design · Medium · 35 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Assume scope changes and stakeholder alignment are part of the interview. Scale: 1M workspaces, 20M

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Assume scope changes and stakeholder alignment are part.

System Design · Hard · 45 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Assume scope changes and stakeholder alignment are part of the interview. Scale: 500K customers,

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Assume scope changes and stakeholder alignment.

System Design · Hard · 45 min

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale:

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Assume legacy constraints, data.

System Design · Hard · 45 min

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 10K

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Assume legacy constraints, data migration.

System Design · Hard · 45 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 500M events per month,

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Assume legacy constraints, data migration risk, and non-technical.

System Design · Hard · 45 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 5M documents, 100K

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Assume legacy constraints, data migration risk, and.

System Design · Hard · 45 min

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 2M metric streams,

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Assume legacy constraints, data migration risk, and.

System Design · Hard · 45 min

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 100K

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Assume legacy constraints, data migration risk.

System Design · Hard · 45 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 100K

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Assume legacy constraints, data migration.

System Design · Hard · 45 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 500 dashboard

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Assume legacy constraints, data migration risk, and.

System Design · Hard · 45 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 20M jobs per

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Assume legacy constraints, data migration risk, and.

System Design · Hard · 45 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 5M payment events per

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Assume legacy constraints, data migration risk, and.

System Design · Hard · 45 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 1M workspaces, 20M

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Assume legacy constraints, data migration risk, and.

System Design · Hard · 45 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Assume legacy constraints, data migration risk, and non-technical stakeholders. Scale: 500K

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Assume legacy constraints, data migration risk.

System Design · Medium · 35 min

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Start with a balanced design and call out the highest-risk tradeoff. Scale: 50M users,

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Start with a balanced design and call.

System Design · Medium · 35 min

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Start with a balanced design and call out the highest-risk tradeoff. Scale: 10K flags, 30K

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Start with a balanced design and call out the.

System Design · Medium · 35 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Start with a balanced design and call out the highest-risk tradeoff. Scale: 500M events per month, customer-specific

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Start with a balanced design and call out the highest-risk tradeoff..

System Design · Medium · 35 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Start with a balanced design and call out the highest-risk tradeoff. Scale: 5M documents, 100K concurrent

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Start with a balanced design and call out the highest-risk.

System Design · Hard · 45 min

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Start with a balanced design and call out the highest-risk tradeoff. Scale: 2M metric streams, 20K alert

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Start with a balanced design and call out the.

System Design · Hard · 45 min

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Start with a balanced design and call out the highest-risk tradeoff. Scale: 100K tenants, 50M

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Start with a balanced design and call out the.

System Design · Hard · 45 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Start with a balanced design and call out the highest-risk tradeoff. Scale: 100K daily

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Start with a balanced design and call out.