Backend Engineering Challenges

Master backend engineering with real-world challenges from top companies. Progress through different levels and build practical skills.

FREE

Design User and Course Schema

Every online learning platform needs a well-structured database to manage users and courses efficiently. Your task is to design a relational database schema that ensures data integrity, flexibility, and scalability while managing users and courses effectively.

beginner
Udemy
Backend Engineerrelational database schema designdata normalization and indexing+1 more
FREE

Build APIs for User Registration and Login

In any web application, user authentication is a critical feature. Your task is to design and implement secure APIs for user registration and login, ensuring data integrity, password security, and token-based authentication for seamless user sessions.

beginner
Udemy
Backend Engineerrest api designsecure password hashing+1 more
FREE

Create Workspace and Channel Management APIs

Craft dynamic APIs to manage workspaces and channels by leveraging multi-tenant design and essential CRUD operations that support collaborative environments.

beginner
Slack
Backend Engineermulti-tenant designbasic crud operations
PRO

Implement Real-Time Ride Request System

Build a high-performance ride request system that processes live data and seamlessly handles request-response workflows to instantly connect riders with drivers.

beginner
Uber
Backend Engineerreal-time data handlingrequest-response workflows+1 more
FREE

Add Pagination and Filtering to Course Listings

Enhance course discovery by implementing intuitive pagination and filtering techniques while mastering query optimization for smooth data retrieval.

beginner
Udemy
Backend Engineerpaginationfiltering+1 more
PRO

Build Basic Rating System for Courses

Design a user-centric course rating system that captures feedback with precision using a well-structured ratings schema and aggregation queries.

beginner
Udemy
Backend Engineerratings schemaaggregation queries
PRO

Enable File Uploads and Sharing in Channels

Implement a secure file upload and sharing feature within channels, focusing on robust metadata handling and safe storage solutions.

beginner
Slack
Backend Engineerfile uploadsmetadata handling+1 more
PRO

Implement Real-Time Typing Indicators

Bring your app to life by adding real-time typing indicators using WebSocket event management to display instant user activity.

beginner
Slack
Backend Engineerwebsocket event managementreal-time updates
PRO

Add Geo-Based Matching for Drivers and Riders

Develop an intelligent matching system that pairs drivers and riders using advanced location algorithms and precise proximity calculations.

beginner
Uber
Backend Engineerlocation-based algorithmsproximity calculations
PRO

Build APIs for Video Upload and Transcoding

Create a robust API for handling video uploads and transcoding, integrating FFmpeg workflows to process media efficiently.

beginner
TikTok
Backend Engineervideo processing workflowsffmpeg integration
FREE

Create APIs for Course Progress Tracking

Design smart APIs to track course progress, efficiently managing state and updating user-specific learning data in real time.

intermediate
Udemy
Backend Engineerstate managementuser-specific data updates
PRO

Build Basic Notifications for Messages

Implement a notification system that uses push notifications and real-time events to keep users instantly informed about new messages.

intermediate
Slack
Backend Engineerpush notificationsreal-time events
PRO

Enable Real-Time Message Delivery for Large Channels

Scale your messaging system for large channels by optimizing WebSocket performance and using distributed messaging to deliver messages in real time.

intermediate
Slack
Backend EngineerReliability Engineerwebsocket scalabilitydistributed messaging
PRO

Add Role-Based Access Control (RBAC) for Workspaces

Secure your workspaces by integrating role-based access control with middleware that enforces hierarchical roles and protects sensitive operations.

intermediate
Slack
Security Engineermiddleware for rbacrole hierarchies
PRO

Design Multi-Language Support for Notifications

Expand your notification system’s reach by designing multi-language support that dynamically localizes content for a global audience.

intermediate
Slack
Backend Engineerlocalizationdynamic content generation
FREE

Implement Basic Video Recommendations

Boost user engagement by building a video recommendation engine that uses collaborative filtering and ranking algorithms to serve personalized content.

intermediate
TikTok
AI/ML SpecialistBackend Engineercollaborative filteringranking algorithms
PRO

Build APIs for Archived Courses

Develop specialized APIs to manage archived courses by implementing soft deletes, streamlined archival workflows, and robust compliance tracking.

intermediate
Udemy
Backend Engineersoft deletesarchival workflows+1 more
PRO

Add Simple Search for MessagesComing Soon

Enhance message retrieval by implementing a simple, yet effective, text search feature powered by smart indexing strategies.

intermediate
Slack
Backend Engineertext searchindexing strategies
FREE

Implement Driver ETA CalculationComing Soon

Accurately estimate driver arrival times by integrating efficient distance calculations and geo-hashing techniques for real-time ETA predictions.

intermediate
Uber
Backend Engineerdistance calculationsgeo-hashing
PRO

Enable Notifications for Live ClassesComing Soon

Keep learners engaged with live class notifications that use event-driven triggers and real-time WebSocket updates for instant alerts.

intermediate
Udemy
Backend Engineerevent-driven notificationswebsocket updates
PRO

Optimize APIs for High Traffic ScenariosComing Soon

Prepare your backend for heavy loads by optimizing APIs with strategic caching, effective rate limiting, and smart load balancing techniques.

intermediate
TikTok
Reliability Engineercachingrate limiting+1 more
PRO

Build Multi-Tenant Analytics DashboardsComing Soon

Design advanced analytics dashboards that serve multiple tenants by combining role-based insights with scalable, real-time data visualization.

intermediate
Slack
Software ArchitectData Engineermulti-tenant designrole-based analytics
PRO

Add AI-Powered Spam Detection for Public ChannelsComing Soon

Integrate cutting-edge AI to automatically filter spam in public channels, using NLP models and smart algorithms to maintain a clean user environment.

intermediate
Slack
AI/ML Specialistnlp modelsspam detection algorithms
PRO

Implement Video Recommendations for FeedComing Soon

Transform your content feed by implementing personalized video recommendations that leverage sophisticated ranking models to deliver tailored content.

intermediate
TikTok
AI/ML Specialistranking modelspersonalized feeds
FREE

Build a Dynamic Pricing Engine for RidesComing Soon

Create a dynamic pricing engine that adjusts ride fares in real time by analyzing user behavior and applying advanced pricing algorithms.

intermediate
Uber
AI/ML Specialistpricing algorithmsreal-time updates+1 more
PRO

Enable Geo-Distributed Databases for Ride DataComing Soon

Enhance data resilience by implementing geo-distributed databases with cross-region replication and eventual consistency to reliably manage ride data.

advanced
Uber
Reliability Engineercross-region replicationeventual consistency
PRO

Build Real-Time Collaboration for DocumentsComing Soon

Empower teams to work together seamlessly by building a real-time document collaboration system that handles state management and conflict resolution on the fly.

advanced
Slack
Backend EngineerSoftware Architectreal-time state managementconflict resolution
PRO

Add Compliance Audits for Enterprise CustomersComing Soon

Ensure enterprise-grade security by implementing comprehensive compliance audits with detailed logging, GDPR adherence, and secure storage.

advanced
Slack
Security Engineeraudit logginggdpr compliance+1 more
PRO

Enable Real-Time Driver Location UpdatesComing Soon

Keep ride tracking precise by enabling real-time driver location updates using geo-distributed systems and WebSocket connectivity for instant positioning.

advanced
Uber
Backend EngineerReliability Engineerwebsocket updatesgeo-distributed systems
PRO

Add AI-Powered Sentiment Analysis for ReviewsComing Soon

Leverage advanced sentiment models and text analysis to evaluate user reviews in real time, capturing genuine feedback to improve services.

advanced
Udemy
AI/ML Specialistsentiment modelstext analysis+1 more
PRO

Implement AI-Powered Insights for EngagementComing Soon

Unlock actionable engagement insights by implementing AI-driven analysis that tracks user behavior and predicts trends in real time.

advanced
TikTok
AI/ML Specialistengagement trackingbehavior prediction+1 more
PRO

Build APIs for Advanced Moderation FeaturesComing Soon

Develop robust moderation APIs that combine intelligent workflows with offensive content detection and AI models to keep communities safe.

advanced
TikTok
Backend Engineermoderation workflowsoffensive content detection+1 more
PRO

Add Predictive Analytics for Workspace RetentionComing Soon

Retention analytics, user behavior modeling.

advanced
Slack
AI/ML Specialistretention analyticsuser behavior modeling
PRO

Enable Scalable API Gateways for High Traffic SystemsComing Soon

API gateway patterns, scalability, security best practices.

advanced
Slack
Backend Engineerapi gateway patternsscalability+1 more
PRO

Build Centralized Logging for Multi-Region SystemsComing Soon

Observability, centralized log aggregation, monitoring tools.

advanced
Slack
Reliability EngineerSoftware Architectobservabilitycentralized log aggregation+1 more
PRO

Add Multi-Tenant Role-Based DashboardsComing Soon

Multi-tenant design, role-based analytics, admin-specific workflows.

advanced
Slack
Software ArchitectSecurity Engineermulti-tenant designrole-based analytics+1 more
PRO

Implement GDPR-Compliant Data Deletion WorkflowsComing Soon

Secure data deletion, compliance tracking, audit trails.

advanced
Udemy
Security Engineersecure data deletioncompliance tracking+1 more
PRO

Build Fault-Tolerant Real-Time MessagingComing Soon

Message queueing, failover mechanisms, redundancy.

advanced
Slack
Reliability Engineermessage queueingfailover mechanisms+1 more
FREE

Optimize APIs for Mobile App IntegrationComing Soon

Refine your API design for mobile platforms by creating mobile-friendly endpoints with robust authentication and effective caching strategies.

advanced
TikTok
Backend Engineermobile-friendly apisauthentication+1 more
PRO

Add Real-Time Notifications for Platform EventsComing Soon

Ensure timely updates by integrating real-time notifications that use event-based triggers, push notifications, and WebSocket workflows to keep users informed.

advanced
Udemy
Backend Engineerevent-based triggerspush notifications+1 more
PRO

Implement Real-Time Fraud Detection for PaymentsComing Soon

Safeguard payment systems by implementing real-time fraud detection using anomaly detection, continuous data monitoring, and machine learning to flag suspicious activity.

advanced
Uber
AI/ML SpecialistData Engineeranomaly detectionreal-time data monitoring+1 more
PRO

Build APIs for Scalable Enterprise AnalyticsComing Soon

Empower enterprises with scalable analytics by building APIs that integrate efficient data pipelines, support batch processing, and deliver real-time insights.

advanced
Slack
Data EngineerSoftware Architectdata pipelinesbatch processing+1 more
PRO

Enable AI-Powered Recommendations for FeedsComing Soon

Transform user experiences with AI-powered recommendations that analyze behavior in real time to curate personalized feeds and boost engagement.

advanced
TikTok
AI/ML Specialistuser behavior analysisreal-time updates+1 more
PRO

Implement Circuit Breaker Patterns for APIsComing Soon

Boost your system’s resilience by implementing circuit breaker patterns that isolate faults and maintain stability during unexpected failures.

advanced
Uber
Reliability Engineerresilience patternsfault isolation+1 more
PRO

Add Dynamic Workflow Automations for TeamsComing Soon

Transform team productivity by integrating dynamic workflow automations that trigger real-time updates and streamline complex processes.

advanced
Slack
Software ArchitectBackend Engineerworkflow triggersreal-time updates+1 more
PRO

Build Scalable Video Transcoding PipelinesComing Soon

Scalable video processing, cloud infrastructure, real-time updates.

advanced
TikTok
Backend Engineerscalable video processingcloud infrastructure+1 more
PRO

Add Multi-Region Failover for Real-Time APIsComing Soon

Active-active failover, disaster recovery.

advanced
Slack
Software ArchitectCloud Engineeractive-active failoverdisaster recovery
PRO

Design Advanced Search Indexing for MessagesComing Soon

Full-text search, multi-language support, real-time indexing.

advanced
Slack
Backend EngineerData Engineerfull-text searchmulti-language support+1 more
PRO

Build Advanced Customization APIs for EnterprisesComing Soon

Tenant-specific APIs, configuration management, dynamic workflows.

advanced
Slack
Software Architecttenant-specific apisconfiguration management+1 more
PRO

Implement Real-Time API Monitoring and AlertsComing Soon

Keep your systems robust by setting up real-time API monitoring and alerts that leverage observability tools to track performance and catch issues early.

advanced
Slack
Reliability Engineerreal-time metricsalerting systems+1 more
FREE

Build a Serverless Queue for Failed PaymentsComing Soon

Serverless functions, retry mechanisms, event-driven architectures.

advanced
Uber
Backend EngineerCloud Engineerserverless functionsretry mechanisms+1 more
PRO

Add Real-Time Incident Monitoring for APIsComing Soon

Fault detection, monitoring, chaos testing, disaster recovery.

advanced
Slack
Reliability EngineerPrincipal Engineerfault detectionmonitoring+2 more
PRO

Implement a Pay-Per-Use API Billing SystemComing Soon

API metering, billing workflows, API gateway integration.

advanced
Udemy
Software ArchitectProduct Engineerapi meteringbilling workflows+1 more
PRO

Design Distributed Tracing for DebuggingComing Soon

Observability, OpenTelemetry, end-to-end tracing across services.

advanced
TikTok
Reliability EngineerSoftware Architectobservabilityopentelemetry+1 more
PRO

Enable Real-Time Document Sync for CollaborationComing Soon

Operational transforms, CRDTs, conflict resolution.

advanced
Slack
Backend EngineerSoftware Architectoperational transformscrdts+1 more
PRO

Scale Pricing Algorithms for Peak DemandComing Soon

Dynamic pricing, load balancing, caching strategies.

advanced
Uber
Software ArchitectPrincipal Engineerdynamic pricingload balancing+1 more
PRO

Automate Audit Trail Generation for User ActionsComing Soon

GDPR compliance, secure logging, audit trail design.

advanced
Udemy
Security EngineerPrincipal Engineergdpr compliancesecure logging+1 more
PRO

Build a Scalable Event Processing PipelineComing Soon

Event-driven designs, message queues, pub/sub workflows.

advanced
TikTok
Reliability EngineerSoftware Architectevent-driven designsmessage queues+1 more
PRO

Deploy APIs Closer to Users with Edge ComputingComing Soon

Edge computing, latency reduction, CDN integration.

advanced
Uber
Backend EngineerCloud Engineeredge computinglatency reduction+1 more
PRO

Add AI-Powered Video RecommendationsComing Soon

Recommendation systems, collaborative filtering, ranking algorithms.

advanced
TikTok
AI/ML SpecialistProduct Engineerrecommendation systemscollaborative filtering+1 more
PRO

Build a CI/CD Pipeline for MicroservicesComing Soon

Accelerate your development cycle by building a robust CI/CD pipeline that leverages GitOps, container orchestration, and streamlined deployment strategies for microservices.

intermediate
Udemy
DevOps EngineerReliability Engineergitopscontainer orchestration+1 more
PRO

Automate Cloud Infrastructure for New FeaturesComing Soon

Simplify feature rollouts by automating cloud infrastructure setup with Infrastructure-as-Code tools like Terraform and CloudFormation for rapid, consistent deployments.

intermediate
Uber
Cloud EngineerDevOps Engineerinfrastructure-as-codeterraform+2 more
PRO

Add Distributed Monitoring for API PerformanceComing Soon

Monitor your APIs like a pro by implementing distributed monitoring that leverages comprehensive metrics, real-time tracing, and dynamic performance dashboards.

intermediate
Slack
Reliability EngineerSoftware Architectmetricsdistributed tracing+1 more
PRO

Secure API Secrets Across Multi-Tenant SystemsComing Soon

Safeguard sensitive data by securely managing API secrets with tools like HashiCorp Vault, ensuring robust secrets management across multi-tenant environments.

intermediate
Udemy
Security Engineerhashicorp vaultsecure secrets management+1 more
FREE

Build a Kubernetes Cluster for High AvailabilityComing Soon

Achieve robust uptime by building a high-availability Kubernetes cluster that leverages scalability, redundancy, and effective load balancing.

intermediate
Uber
Cloud EngineerPrincipal Engineercluster scalingredundancy+1 more
PRO

Implement Zero-Trust APIs for Internal ServicesComing Soon

Elevate internal security by implementing zero-trust APIs that rely on strict token validation and secure communication channels.

advanced
Slack
Security Engineerzero-trust principlesapi tokens+1 more
PRO

Build Secure Multi-Tenant Systems for EnterprisesComing Soon

Design enterprise-grade multi-tenant systems that enforce data segregation and robust security policies tailored to each tenant.

advanced
Udemy
Security EngineerSoftware Architectdata segregationtenant-specific security policies
PRO

Enable Role-Based Encryption for Admin AccessComing Soon

Enhance admin security by implementing role-based encryption that combines robust encryption strategies with strict RBAC to protect sensitive operations.

advanced
Slack
Security EngineerBackend Engineerencryption strategiesrbac for sensitive operations+1 more
PRO

Automate API Vulnerability ScansComing Soon

Strengthen your API defenses by automating vulnerability scans, ensuring continuous API hardening and compliance with security standards.

advanced
TikTok
Security EngineerDevOps Engineervulnerability scanning toolsapi hardening+1 more
FREE

Build OAuth 2.0 for Multi-Provider LoginComing Soon

Streamline user authentication by building an OAuth 2.0 system that supports multi-provider logins with secure token validation and smooth social integration.

advanced
Uber
Security EngineerBackend Engineeroauth 2.0 implementationtoken validation+1 more
PRO

Design Batch Pipelines for Course Completion DataComing Soon

Harness big data by designing efficient batch pipelines using Apache Spark to aggregate and process course completion data at scale.

advanced
Udemy
Data Engineerbatch processingapache spark+1 more
PRO

Build a Data Lake for Video AnalyticsComing Soon

Create a centralized data lake that streamlines ETL workflows, supports big data storage, and powers comprehensive video analytics reporting.

advanced
Slack
Data EngineerSoftware Architectetl workflowsbig data storage+1 more
PRO

Optimize ETL Workflows for Large-Scale ReportsComing Soon

Boost reporting efficiency by optimizing ETL workflows with advanced data transformations and orchestration tools to handle large-scale data seamlessly.

advanced
Udemy
Data Engineerpipeline performancedata transformations+1 more
PRO

Build Real-Time Analytics for Video EngagementComing Soon

Deliver immediate insights by creating real-time dashboards that track video engagement and visualize trends for data-driven decision making.

advanced
TikTok
Data EngineerProduct Engineerreal-time dashboardsengagement tracking+1 more
PRO

Add AI-Powered Retention Insights for UsersComing Soon

Boost user retention by integrating AI-powered insights that use predictive analytics and time-series analysis to model and forecast user behavior.

advanced
TikTok
AI/ML SpecialistData Engineerretention modelingpredictive analytics+1 more
PRO

Build Fault-Tolerant APIs for Real-Time MessagingComing Soon

Design resilient messaging APIs that incorporate fault isolation, failover strategies, and active-active replication to ensure uninterrupted real-time communication.

advanced
Uber
Reliability EngineerPrincipal Engineerfault isolationfailover strategies+1 more
PRO

Implement a Centralized API Gateway for ScalingComing Soon

Scale your services efficiently by building a centralized API gateway that streamlines request routing and enforces scalability patterns across your backend.

advanced
Slack
Software ArchitectProduct Engineerapi gateway patternsscalability+1 more
PRO

Scale Multi-Region Databases for Rideshare DataComing Soon

Empower your data infrastructure by scaling multi-region databases with robust cross-region replication, ensuring eventual consistency and optimal latency.

advanced
Uber
Cloud EngineerReliability Engineercross-region replicationeventual consistency+1 more
PRO

Enable Dynamic Plan Pricing for Course PlatformsComing Soon

Transform course monetization by implementing dynamic plan pricing that uses tiered models, real-time adjustments, and forecasting to maximize revenue.

advanced
Udemy
Product EngineerAI/ML Specialisttiered pricingreal-time adjustments+1 more
PRO

Build Collaborative Workspace APIs for TeamsComing Soon

Foster teamwork by creating collaborative workspace APIs that enable real-time document editing and state synchronization using conflict-free techniques.

advanced
Slack
Software ArchitectBackend Engineerreal-time collaborationstate synchronization+1 more
PRO

Optimize Global Content Delivery for Social MediaComing Soon

Enhance user experiences by optimizing global content delivery through CDN integration, static asset optimization, and effective geo-distribution strategies.

advanced
TikTok
Cloud EngineerBackend Engineercdn integrationstatic asset optimization+1 more
PRO

Automate Enterprise Compliance AuditsComing Soon

Streamline regulatory adherence by automating enterprise compliance audits with secure data storage and efficient reporting pipelines.

advanced
Udemy
Security EngineerSoftware Architectcompliance workflowssecure storage+1 more
PRO

Build Webhooks for External App IntegrationsComing Soon

Enable seamless third-party connectivity by building robust webhook APIs that support automatic retries and real-time notifications.

advanced
Slack
Backend EngineerSoftware Architectwebhook apisretries+1 more
PRO

Add Role-Based Access Control for Admin DashboardsComing Soon

Secure your admin interfaces by implementing comprehensive RBAC that manages permissions and ensures tenant isolation across dashboards.

advanced
Slack
Security EngineerBackend Engineerrbac implementationpermissions workflows+1 more
PRO

Build Multi-Tenant Analytics DashboardsComing Soon

Design versatile analytics dashboards that deliver tenant-specific data views while ensuring strict isolation and peak performance.

advanced
Udemy
Data EngineerSoftware Architecttenant-specific data viewsisolation+1 more
PRO

Build Fraud Detection for Ride PaymentsComing Soon

Protect transactions with an intelligent fraud detection system that uses anomaly detection, real-time tracking, and behavioral analysis to safeguard ride payments.

advanced
Uber
AI/ML SpecialistData Engineeranomaly detectionreal-time fraud tracking+1 more
PRO

Add AI-Powered Moderation for Social FeedsComing Soon

Enhance community safety by integrating AI-powered moderation that uses NLP to filter toxic content and analyze user behavior in real time.

advanced
TikTok
AI/ML SpecialistBackend Engineernlp-based moderationtoxic content filtering+1 more
FREE

Personalize Course Recommendations for StudentsComing Soon

Deliver a tailored learning experience by building recommendation engines that use collaborative filtering to serve personalized course suggestions.

advanced
Udemy
AI/ML SpecialistProduct Engineerrecommendation enginescollaborative filtering+1 more
PRO

Enable Scalable Model Serving for InferenceComing Soon

Deploy a scalable model serving infrastructure that optimizes AI inference, reducing latency while delivering accurate predictions in real time.

advanced
TikTok
AI/ML SpecialistSoftware Architectai model servinginference optimization+1 more
PRO

Add Multi-Modal Recommendations for Social FeedsComing Soon

Revolutionize social feeds by integrating multi-modal recommendations that combine text, video, and behavioral data to deliver uniquely personalized content.

advanced
TikTok
AI/ML SpecialistData Engineercombining textvideo+2 more