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 335 of 386 · 18,491 tasks

Problem Solving · Medium · 16 min

Engineering case for Backend Engineer (PYTHON_FASTAPI): Stop duplicate offline actions after reconnect

Engineering case for Backend Engineer (PYTHONFASTAPI): Stop duplicate offline actions after reconnect. Mobile users on unstable networks see duplicate submissions after reconnecting.

Problem Solving · Easy · 12 min

Engineering case for Full-stack Engineer (FULLSTACK_FRONTEND_FOCUS): Contain a retry storm without losing work

Engineering case for Full-stack Engineer (FULLSTACKFRONTENDFOCUS): Contain a retry storm without losing work. A downstream provider times out and retries saturate shared workers, causing.

Problem Solving · Medium · 16 min

Engineering case for Frontend Engineer (ANGULAR): Ship a permission hotfix with bounded risk

Engineering case for Frontend Engineer (ANGULAR): Ship a permission hotfix with bounded risk. A production fallback path can expose project metadata to a user with an expired role. The clean.

Problem Solving · Hard · 20 min

Engineering case for Backend Engineer (PYTHON_FLASK): Restore decision-grade visibility during an incident

Engineering case for Backend Engineer (PYTHONFLASK): Restore decision-grade visibility during an incident. An incident is active, but logs are noisy, traces sample away the affected path.

Problem Solving · Medium · 16 min

Engineering case for Full-stack Engineer (FULLSTACK_BACKEND_FOCUS): Resolve an unowned failing enterprise workflow

Engineering case for Full-stack Engineer (FULLSTACKBACKENDFOCUS): Resolve an unowned failing enterprise workflow. Two teams each own part of an enterprise workflow and both assume the other.

Problem Solving · Hard · 20 min

Engineering case for Frontend Engineer (VUE): Redesign coverage after a real workflow escaped

Engineering case for Frontend Engineer (VUE): Redesign coverage after a real workflow escaped. A production defect passed a green suite because tests covered isolated happy paths but not the.

Problem Solving · Easy · 12 min

Engineering case for Backend Engineer (PYTHON_DJANGO): Triage an intermittent checkout data-loss report

Engineering case for Backend Engineer (PYTHONDJANGO): Triage an intermittent checkout data-loss report. A strategic customer is threatening to pause rollout after selected checkout options.

Problem Solving · Hard · 20 min

Engineering case for Full-stack Engineer (FULLSTACK_BALANCED): Resolve conflicting executive metrics

Engineering case for Full-stack Engineer (FULLSTACKBALANCED): Resolve conflicting executive metrics. Leadership sees an 18% revenue drop in one dashboard while billing and product telemetry.

Problem Solving · Easy · 12 min

Engineering case for Frontend Engineer (WEB_CORE_HTML_CSS_JS_TS): Make a release decision with a flaky critical test

Engineering case for Frontend Engineer (WEBCOREHTMLCSSJSTS): Make a release decision with a flaky critical test. A revenue-critical release is due tomorrow, but the end-to-end payment test.

Problem Solving · Medium · 16 min

Engineering case for Backend Engineer (JAVA_SPRING): Negotiate a late cross-cutting feature safely

Engineering case for Backend Engineer (JAVASPRING): Negotiate a late cross-cutting feature safely. A commercial stakeholder requests a late feature touching authentication, billing, and.

Problem Solving · Easy · 12 min

Engineering case for Full-stack Engineer (FULLSTACK_CLOUD_NATIVE): Unblock a slipping cross-team API migration

Engineering case for Full-stack Engineer (FULLSTACKCLOUDNATIVE): Unblock a slipping cross-team API migration. Your launch depends on another team replacing a deprecated contract, but their.

Problem Solving · Medium · 16 min

Engineering case for Frontend Engineer (REACT): Stop duplicate offline actions after reconnect

Engineering case for Frontend Engineer (REACT): Stop duplicate offline actions after reconnect. Mobile users on unstable networks see duplicate submissions after reconnecting, creating.

Problem Solving · Hard · 20 min

Engineering case for Backend Engineer (NODE_EXPRESS): Diagnose stale navigation state without breaking caching

Engineering case for Backend Engineer (NODEEXPRESS): Diagnose stale navigation state without breaking caching. Users returning from detail pages see stale filtered results even though direct.

Problem Solving · Medium · 16 min

Engineering case for Full-stack Engineer (FULLSTACK_FRONTEND_FOCUS): Ship a permission hotfix with bounded risk

Engineering case for Full-stack Engineer (FULLSTACKFRONTENDFOCUS): Ship a permission hotfix with bounded risk. A production fallback path can expose project metadata to a user with an.

Problem Solving · Hard · 20 min

Engineering case for Frontend Engineer (ANGULAR): Restore decision-grade visibility during an incident

Engineering case for Frontend Engineer (ANGULAR): Restore decision-grade visibility during an incident. An incident is active, but logs are noisy, traces sample away the affected path, and.

Problem Solving · Easy · 12 min

Engineering case for Backend Engineer (NODE_FASTIFY): Choose between a latency shortcut and durable architecture

Engineering case for Backend Engineer (NODEFASTIFY): Choose between a latency shortcut and durable architecture. A shortcut can meet the next performance target but duplicates business logic.

Problem Solving · Hard · 20 min

Engineering case for Full-stack Engineer (FULLSTACK_BACKEND_FOCUS): Redesign coverage after a real workflow escaped

Engineering case for Full-stack Engineer (FULLSTACKBACKENDFOCUS): Redesign coverage after a real workflow escaped. A production defect passed a green suite because tests covered isolated.

Problem Solving · Easy · 12 min

Engineering case for Frontend Engineer (VUE): Triage an intermittent checkout data-loss report

Engineering case for Frontend Engineer (VUE): Triage an intermittent checkout data-loss report. A strategic customer is threatening to pause rollout after selected checkout options.

Problem Solving · Medium · 16 min

Engineering case for Backend Engineer (NODE_NESTJS): Contain a segment-specific latency regression

Engineering case for Backend Engineer (NODENESTJS): Contain a segment-specific latency regression. A release completed two hours ago. Enterprise traffic now breaches its latency SLO while.

Problem Solving · Easy · 12 min

Engineering case for Full-stack Engineer (FULLSTACK_BALANCED): Make a release decision with a flaky critical test

Engineering case for Full-stack Engineer (FULLSTACKBALANCED): Make a release decision with a flaky critical test. A revenue-critical release is due tomorrow, but the end-to-end payment test.

Problem Solving · Medium · 16 min

Engineering case for Frontend Engineer (WEB_CORE_HTML_CSS_JS_TS): Negotiate a late cross-cutting feature safely

Engineering case for Frontend Engineer (WEBCOREHTMLCSSJSTS): Negotiate a late cross-cutting feature safely. A commercial stakeholder requests a late feature touching authentication, billing.

Problem Solving · Hard · 20 min

Engineering case for Backend Engineer (PYTHON_FASTAPI): Plan a reversible core-table migration under live traffic

Engineering case for Backend Engineer (PYTHONFASTAPI): Plan a reversible core-table migration under live traffic. A 2.4 TB orders table must gain a new ownership model while reads and writes.

Problem Solving · Medium · 16 min

Engineering case for Full-stack Engineer (FULLSTACK_CLOUD_NATIVE): Stop duplicate offline actions after reconnect

Engineering case for Full-stack Engineer (FULLSTACKCLOUDNATIVE): Stop duplicate offline actions after reconnect. Mobile users on unstable networks see duplicate submissions after.

Problem Solving · Hard · 20 min

Engineering case for Frontend Engineer (REACT): Diagnose stale navigation state without breaking caching

Engineering case for Frontend Engineer (REACT): Diagnose stale navigation state without breaking caching. Users returning from detail pages see stale filtered results even though direct.

Problem Solving · Easy · 12 min

Engineering case for Backend Engineer (PYTHON_FLASK): Contain a retry storm without losing work

Engineering case for Backend Engineer (PYTHONFLASK): Contain a retry storm without losing work. A downstream provider times out and retries saturate shared workers, causing unrelated API.

Problem Solving · Hard · 20 min

Engineering case for Full-stack Engineer (FULLSTACK_FRONTEND_FOCUS): Restore decision-grade visibility during an incident

Engineering case for Full-stack Engineer (FULLSTACKFRONTENDFOCUS): Restore decision-grade visibility during an incident. An incident is active, but logs are noisy, traces sample away the.

Problem Solving · Easy · 12 min

Engineering case for Frontend Engineer (ANGULAR): Choose between a latency shortcut and durable architecture

Engineering case for Frontend Engineer (ANGULAR): Choose between a latency shortcut and durable architecture. A shortcut can meet the next performance target but duplicates business logic.

Problem Solving · Medium · 16 min

Engineering case for Backend Engineer (PYTHON_DJANGO): Resolve an unowned failing enterprise workflow

Engineering case for Backend Engineer (PYTHONDJANGO): Resolve an unowned failing enterprise workflow. Two teams each own part of an enterprise workflow and both assume the other owns its.

Problem Solving · Easy · 12 min

Engineering case for Full-stack Engineer (FULLSTACK_BACKEND_FOCUS): Triage an intermittent checkout data-loss report

Engineering case for Full-stack Engineer (FULLSTACKBACKENDFOCUS): Triage an intermittent checkout data-loss report. A strategic customer is threatening to pause rollout after selected.

Problem Solving · Medium · 16 min

Engineering case for Frontend Engineer (VUE): Contain a segment-specific latency regression

Engineering case for Frontend Engineer (VUE): Contain a segment-specific latency regression. A release completed two hours ago. Enterprise traffic now breaches its latency SLO while the.

Problem Solving · Hard · 20 min

Engineering case for Backend Engineer (JAVA_SPRING): Resolve conflicting executive metrics

Engineering case for Backend Engineer (JAVASPRING): Resolve conflicting executive metrics. Leadership sees an 18% revenue drop in one dashboard while billing and product telemetry remain.

Problem Solving · Medium · 16 min

Engineering case for Full-stack Engineer (FULLSTACK_BALANCED): Negotiate a late cross-cutting feature safely

Engineering case for Full-stack Engineer (FULLSTACKBALANCED): Negotiate a late cross-cutting feature safely. A commercial stakeholder requests a late feature touching authentication.

Problem Solving · Hard · 20 min

Engineering case for Frontend Engineer (WEB_CORE_HTML_CSS_JS_TS): Plan a reversible core-table migration under live traffic

Engineering case for Frontend Engineer (WEBCOREHTMLCSSJSTS): Plan a reversible core-table migration under live traffic. A 2.4 TB orders table must gain a new ownership model while reads and.

Problem Solving · Easy · 12 min

Engineering case for Backend Engineer (NODE_EXPRESS): Unblock a slipping cross-team API migration

Engineering case for Backend Engineer (NODEEXPRESS): Unblock a slipping cross-team API migration. Your launch depends on another team replacing a deprecated contract, but their delivery date.

Problem Solving · Hard · 20 min

Engineering case for Full-stack Engineer (FULLSTACK_CLOUD_NATIVE): Diagnose stale navigation state without breaking caching

Engineering case for Full-stack Engineer (FULLSTACKCLOUDNATIVE): Diagnose stale navigation state without breaking caching. Users returning from detail pages see stale filtered results even.

Problem Solving · Easy · 12 min

Engineering case for Frontend Engineer (REACT): Contain a retry storm without losing work

Engineering case for Frontend Engineer (REACT): Contain a retry storm without losing work. A downstream provider times out and retries saturate shared workers, causing unrelated API requests.

Problem Solving · Medium · 16 min

Engineering case for Backend Engineer (NODE_FASTIFY): Ship a permission hotfix with bounded risk

Engineering case for Backend Engineer (NODEFASTIFY): Ship a permission hotfix with bounded risk. A production fallback path can expose project metadata to a user with an expired role. The.

Problem Solving · Easy · 12 min

Engineering case for Full-stack Engineer (FULLSTACK_FRONTEND_FOCUS): Choose between a latency shortcut and durable architecture

Engineering case for Full-stack Engineer (FULLSTACKFRONTENDFOCUS): Choose between a latency shortcut and durable architecture. A shortcut can meet the next performance target but duplicates.

Problem Solving · Medium · 16 min

Engineering case for Frontend Engineer (ANGULAR): Resolve an unowned failing enterprise workflow

Engineering case for Frontend Engineer (ANGULAR): Resolve an unowned failing enterprise workflow. Two teams each own part of an enterprise workflow and both assume the other owns its failing.

Problem Solving · Hard · 20 min

Engineering case for Backend Engineer (NODE_NESTJS): Redesign coverage after a real workflow escaped

Engineering case for Backend Engineer (NODENESTJS): Redesign coverage after a real workflow escaped. A production defect passed a green suite because tests covered isolated happy paths but.

Problem Solving · Medium · 16 min

Engineering case for Full-stack Engineer (FULLSTACK_BACKEND_FOCUS): Contain a segment-specific latency regression

Engineering case for Full-stack Engineer (FULLSTACKBACKENDFOCUS): Contain a segment-specific latency regression. A release completed two hours ago. Enterprise traffic now breaches its.

Problem Solving · Hard · 20 min

Engineering case for Frontend Engineer (VUE): Resolve conflicting executive metrics

Engineering case for Frontend Engineer (VUE): Resolve conflicting executive metrics. Leadership sees an 18% revenue drop in one dashboard while billing and product telemetry remain within.

Problem Solving · Easy · 12 min

Engineering case for Backend Engineer (PYTHON_FASTAPI): Make a release decision with a flaky critical test

Engineering case for Backend Engineer (PYTHONFASTAPI): Make a release decision with a flaky critical test. A revenue-critical release is due tomorrow, but the end-to-end payment test fails.

Problem Solving · Hard · 20 min

Engineering case for Full-stack Engineer (FULLSTACK_BALANCED): Plan a reversible core-table migration under live traffic

Engineering case for Full-stack Engineer (FULLSTACKBALANCED): Plan a reversible core-table migration under live traffic. A 2.4 TB orders table must gain a new ownership model while reads and.

Problem Solving · Easy · 12 min

Engineering case for Frontend Engineer (WEB_CORE_HTML_CSS_JS_TS): Unblock a slipping cross-team API migration

Engineering case for Frontend Engineer (WEBCOREHTMLCSSJSTS): Unblock a slipping cross-team API migration. Your launch depends on another team replacing a deprecated contract, but their.

Problem Solving · Medium · 16 min

Engineering case for Backend Engineer (PYTHON_FLASK): Stop duplicate offline actions after reconnect

Engineering case for Backend Engineer (PYTHONFLASK): Stop duplicate offline actions after reconnect. Mobile users on unstable networks see duplicate submissions after reconnecting, creating.

Problem Solving · Easy · 12 min

Engineering case for Full-stack Engineer (FULLSTACK_CLOUD_NATIVE): Contain a retry storm without losing work

Engineering case for Full-stack Engineer (FULLSTACKCLOUDNATIVE): Contain a retry storm without losing work. A downstream provider times out and retries saturate shared workers, causing.

Problem Solving · Medium · 16 min

Engineering case for Frontend Engineer (REACT): Ship a permission hotfix with bounded risk

Engineering case for Frontend Engineer (REACT): Ship a permission hotfix with bounded risk. A production fallback path can expose project metadata to a user with an expired role. The clean.