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Master Your Skills Through Practice

Prepare for interviews, learn offline, and compare your results with other developers

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A simple yet comprehensive plan to follow

Choose your role and practice the categories interviewers care about, from language fundamentals and frameworks to system design.

Senior Frontend Developer

  • JavaScript
  • TypeScript
  • React
  • CSS
  • Web APIs
  • System Design
  • Testing
  • Performance

Staff DevOps Engineer

  • Kubernetes
  • Terraform
  • CI/CD
  • Linux
  • Networking
  • Observability
  • AWS
  • Security

Senior Data Engineer

  • Python
  • SQL
  • Spark
  • Airflow
  • Data modeling
  • ETL
  • Kafka
  • Cloud

Middle QA Engineer

  • Test design
  • Playwright
  • API testing
  • CI
  • Bug reporting
  • SQL
  • Mobile
  • Performance

Principal Backend Developer

  • Java
  • Go
  • REST APIs
  • PostgreSQL
  • System Design
  • Docker
  • Caching
  • Observability

Middle Game Developer

  • C#
  • Unity
  • Physics
  • 3D Math
  • Gameplay
  • Networking
  • C++
  • Asset pipelines

Senior Mobile Developer

  • Swift
  • Kotlin
  • iOS
  • Android
  • SwiftUI
  • Jetpack Compose
  • Mobile architecture
  • REST

Senior Full-Stack Developer

  • TypeScript
  • Node.js
  • React
  • PostgreSQL
  • REST
  • System Design
  • Docker
  • Auth

Supported developer roles and practice topics

  • Senior Frontend Developer

    Skills and topics: JavaScript, TypeScript, React, CSS, Web APIs, System Design, Testing, Performance.

  • Principal Backend Developer

    Skills and topics: Java, Go, REST APIs, PostgreSQL, System Design, Docker, Caching, Observability.

  • Staff DevOps Engineer

    Skills and topics: Kubernetes, Terraform, CI/CD, Linux, Networking, Observability, AWS, Security.

  • Middle Game Developer

    Skills and topics: C#, Unity, Physics, 3D Math, Gameplay, Networking, C++, Asset pipelines.

  • Senior Data Engineer

    Skills and topics: Python, SQL, Spark, Airflow, Data modeling, ETL, Kafka, Cloud.

  • Senior Mobile Developer

    Skills and topics: Swift, Kotlin, iOS, Android, SwiftUI, Jetpack Compose, Mobile architecture, REST.

  • Middle QA Engineer

    Skills and topics: Test design, Playwright, API testing, CI, Bug reporting, SQL, Mobile, Performance.

  • Senior Full-Stack Developer

    Skills and topics: TypeScript, Node.js, React, PostgreSQL, REST, System Design, Docker, Auth.

Categories converge on your role so you practice one coherent path, not a scattered topic list.

Practice and Test

Practice

Drill in free flow - no timer, no pressure. Lean on hints when you stall, open documentation in context, and keep momentum so practice feels like shipping, not cramming.

Test

Then turn the dial: focused runs that cement what sticks, spotlight the gaps you'd rather fix now than in an interview, and show how you stack up against developers targeting the same role.

Frequently Asked Questions

Everything you need to know about SkillHacker

SkillHacker is a platform that helps developers improve their skills through practice questions, prepare for technical interviews, and track their progress. You can compare your results with other developers.

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