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 369 of 386 · 18,491 tasks

System Design · Medium · 35 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Start with a balanced design and call out the highest-risk tradeoff. Scale: 500 dashboard widgets per

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Start with a balanced design and call out the.

System Design · Hard · 45 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Start with a balanced design and call out the highest-risk tradeoff. Scale: 20M jobs per day,

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Start with a balanced design and call out the.

System Design · Hard · 45 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Start with a balanced design and call out the highest-risk tradeoff. Scale: 5M payment events per day, money

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Start with a balanced design and call out the highest-risk.

System Design · Medium · 35 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Start with a balanced design and call out the highest-risk tradeoff. Scale: 1M workspaces, 20M projects,

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Start with a balanced design and call out the.

System Design · Hard · 45 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Start with a balanced design and call out the highest-risk tradeoff. Scale: 500K customers,

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Start with a balanced design and call out the.

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 a high-scale interview loop that will push on bottlenecks, failure modes, and

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Assume a high-scale interview loop.

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 a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs.

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Assume a high-scale interview loop that will.

System Design · Hard · 45 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs. Scale: 500M events per

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Assume a high-scale interview loop that will push on bottlenecks.

System Design · Hard · 45 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs. Scale: 5M

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Assume a high-scale interview loop that will push on.

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 a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs. Scale: 2M

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Assume a high-scale interview loop that will push on.

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 a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs.

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Assume a high-scale interview loop that will.

System Design · Hard · 45 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Assume a high-scale interview loop that.

System Design · Hard · 45 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs. Scale:

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Assume a high-scale interview loop that will push on.

System Design · Hard · 45 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs. Scale:

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Assume a high-scale interview loop that will push on.

System Design · Hard · 45 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs. Scale: 5M

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Assume a high-scale interview loop that will push on.

System Design · Hard · 45 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs. Scale: 1M

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Assume a high-scale interview loop that will push on.

System Design · Hard · 45 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Assume a high-scale interview loop that will push on bottlenecks, failure modes, and tradeoffs.

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Assume a high-scale interview loop that will.

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. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 50M

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Optimize for a pragmatic first version.

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. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 10K flags,

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Optimize for a pragmatic first version while.

System Design · Medium · 35 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 500M events per month,

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Optimize for a pragmatic first version while keeping the design.

System Design · Medium · 35 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 5M documents, 100K

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Optimize for a pragmatic first version while keeping the.

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. Optimize for a pragmatic first version while keeping the design evolvable. 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. Optimize for a pragmatic first version while keeping.

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. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 100K tenants,

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Optimize for a pragmatic first version while.

System Design · Hard · 45 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 100K daily

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Optimize for a pragmatic first version.

System Design · Medium · 35 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 500 dashboard

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Optimize for a pragmatic first version while keeping.

System Design · Hard · 45 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 20M jobs per day,

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Optimize for a pragmatic first version while keeping.

System Design · Hard · 45 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 5M payment events per day,

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Optimize for a pragmatic first version while keeping the.

System Design · Medium · 35 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 1M workspaces, 20M

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Optimize for a pragmatic first version while keeping the.

System Design · Hard · 45 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Optimize for a pragmatic first version while keeping the design evolvable. Scale: 500K customers,

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Optimize for a pragmatic first version while.

System Design · Easy · 35 min

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Keep the scope smaller and focus on clear components, APIs, and obvious failure

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Keep the scope smaller and focus on.

System Design · Easy · 35 min

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling.

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Keep the scope smaller and focus on clear.

System Design · Easy · 35 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale: 500M events per month,

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Keep the scope smaller and focus on clear components, APIs, and.

System Design · Easy · 35 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale: 5M

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Keep the scope smaller and focus on clear components.

System Design · Medium · 35 min

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale: 2M

Design an alerting and escalation system that routes production incidents to the right on-call engineers while reducing alert fatigue. Keep the scope smaller and focus on clear components.

System Design · Medium · 35 min

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale:

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Keep the scope smaller and focus on clear.

System Design · Medium · 35 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling.

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Keep the scope smaller and focus on clear.

System Design · Easy · 35 min

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale: 500

Design a frontend architecture for a configurable analytics dashboard with saved views, filters, charts, permissions, and heavy datasets. Keep the scope smaller and focus on clear.

System Design · Medium · 35 min

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale: 20M

Design a backend job orchestration platform for long-running customer workflows with retries, cancellation, dependencies, and visibility. Keep the scope smaller and focus on clear.

System Design · Medium · 35 min

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale: 5M payment

Design a payment ledger for marketplace payouts with refunds, chargebacks, idempotent provider callbacks, and daily reconciliation. Keep the scope smaller and focus on clear components.

System Design · Easy · 35 min

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale: 1M

Design a team workspace product with projects, invitations, permissions, activity feeds, notifications, and real-time collaboration. Keep the scope smaller and focus on clear components.

System Design · Medium · 35 min

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Keep the scope smaller and focus on clear components, APIs, and obvious failure handling. Scale:

Design a subscription billing experience with plan changes, invoices, trials, webhook reconciliation, entitlements, and admin support tooling. Keep the scope smaller and focus on clear.

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. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 50M

Design a notification platform that can send email, push, and SMS notifications while respecting user preferences, retries, rate limits, and analytics. Emphasize reliability, auditability.

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. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 10K flags,

Design a feature flag platform for gradual rollouts, kill switches, experiments, and targeted releases across web, mobile, and backend services. Emphasize reliability, auditability.

System Design · Hard · 45 min

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 500M events per month,

Design an audit log platform that records security-sensitive actions and lets customers search, export, and retain logs. Emphasize reliability, auditability, migrations, and operational.

System Design · Hard · 45 min

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 5M documents, 100K

Design a collaborative comments system for documents with mentions, permissions, unread state, edit history, and real-time updates. Emphasize reliability, auditability, migrations, 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. Emphasize reliability, auditability, migrations, and operational ownership. 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. Emphasize reliability, auditability, migrations, 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. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 100K tenants,

Design a permissions platform for a multi-tenant SaaS product with roles, groups, resource-level access, audit logs, and safe policy changes. Emphasize reliability, auditability, migrations.

System Design · Hard · 45 min

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Emphasize reliability, auditability, migrations, and operational ownership. Scale: 100K daily

Design the frontend architecture for a collaborative document editor with offline edits, comments, presence, permissions, and conflict resolution. Emphasize reliability, auditability.