Top 10 Coding Test Platforms for Technical Interviews
From rapid advancements in AI to evolving programming languages, the demand for highly skilled tech talent is at an all-time high. As the market becomes more competitive, it can be difficult to find the right candidates, which leads to extended hiring time, expensive recruitment fees, and extra pressure. One solution is to adopt a skills-based hiring approach, where recruiters focus on candidates’ capabilities instead of their work history or degrees.
As of 2024, 88% of tech companies have implemented a skills-based model, reflecting a shift toward objective evaluation processes. How can you be sure the candidates you interview have the necessary skills to succeed? Simple — 69% of tech candidates are completing coding tests as part of their application process. This article explores the top 10 coding tests for interviews, so you can find the right platforms to streamline recruitment.
1. HackerRank
Over 3,000 tech teams, including 25% of Fortune 100 companies, use HackerRank's robust platform. With the motto "skills speak louder than words," it offers a comprehensive suite of tools for technical interviews and hiring to certify talent. You can customize challenges to evaluate specific skills and also familiarize candidates with the practice area for preparation. Features include:
- Centralized test settings and team management system
- Advanced applicant tracking system integration
- AI-powered plagiarism checker
2. Codility
Codility is a platform that creates real-world coding challenges for job interviews. Trusted by companies such as Microsoft, Amazon and PayPal, Codility streamlines the hiring process by offering a range of customizable assessments and coding tests based on skill level. LiveRamp processes over 7,000 applications each year and completes over 1,000 Codility assessments, resulting in more than 100 new hires annually. This company claims Codility has helped them reduce time-to-hire while maintaining an excellent candidate experience. Among the features are:
- Automated scoring system for quick, accurate evaluations
- AI-powered plagiarism checker
- Support for multiple programming languages
3. LeetCode
While LeetCode's primary use isn't for conducting interviews, it remains the go-to platform for candidates preparing for coding challenges during job interviews. With an extensive library of coding issues and community-driven features, LeetCode equips developers with the essential tools to succeed. LeetCode's problem set closely mirrors queries by top companies, making it an excellent resource for tech professionals and hiring managers developing their own coding tests. Features include:
- Question lists tailored to Facebook, Amazon, Apple, Netflix, Google
- Active community forums and peer collaboration
- Mock interviews and coding contests
4. CoderPad
CoderPad specializes in live coding interviews through its interactive platform, which offers a real-time environment for candidates and hiring managers to collaborate. Favored by companies such as Uber, Robinhood and Dropbox, this company prioritizes accessibility while providing great candidate experiences. To date, CoderPad has hosted over four million interviews globally. With 80% of businesses recruiting developers who come from non-academic backgrounds and just 15% of developers working on-site full-time, having a hybrid tool such as CoderPad is a game changer. Interactive content includes:
- Support for 30+ programming languages
- Code execution and testing capabilities to debug solutions
- Integrated audio and video tools that mimic integrated development environments
5. CodeSignal
CodeSignal uses AI-driven assessments to provide comprehensive tools for evaluating technical skills, making it the preferred platform for companies such as Zoom and Asana. Its focus on precision and scalability promises candidate evaluations across a diverse range of roles. With its automated technical interviews and an AI-powered assessment framework, you can increase screening efficiency, reduce hiring bias and improve candidate experience. Features include:
- Task-based coding tests imitating real-world scenarios
- Remote proctoring tools to maintain integrity during assessments
- Customizable test frameworks
6. TestDome
TestDome focuses on short, practical programming tests that simulate real-world scenarios. Trusted by companies such as eBay, PayPal and DHL, it provides assessments measuring each candidate's job-specific skills across multiple domains. These tests include common coding interview questions and typically take between one and two hours to complete. Test features include:
- Plagiarism detection through webcam and screen proctoring
- Customizable tests in multiple programming languages
- Automated scoring to streamline candidate screening
7. HackerEarth
HackerEarth offers a comprehensive platform for developer hiring and engagement. Used by companies such as Amazon, Walmart and Pitney Bowes, it covers the recruitment cycle from coding challenges to detailed performance analysis. HackerEarth's library of coding tests has over 17,000 questions across more than 900 skills. Features include:
- AI-powered candidate matching
- Hackathon hosting capabilities
- Keyword-based subjective evaluation and AI-based evaluation
8. Qualified.io
Qualified.io excels in customizable technical assessments that align seamlessly with specific job requirements. Companies such as Klarna, Lever and Andela trust this platform to simulate real-world scenarios during technical interviews. Qualified.io offers support for a wide range of programming languages and uses an automated 0 to 100 scoring system, ensuring consistent evaluations. Features include:
- IDE with unit testing frameworks
- Detailed reporting and analytics to benchmark performance
- Sandboxed development environments that mimic on-the-job coding
9. CodeInterview
CodeInterview makes remote technical interviews easier by focusing on real-time collaboration and skill assessment. This platform has access to a global talent pool, providing objective assessments for comprehensive evaluations. With common coding interview questions and user-friendly tools, CodeInterview ensures an inspiring candidate experience. Features include:
- Integrated video conferencing
- Support for 30+ programming languages
- Screen sharing capabilities
10. freeCodeCamp
freeCodeCamp is highly regarded as a free resource for candidates preparing for coding tests. With an extensive curriculum and practical challenges, it helps build strong foundational skills. Thousands of developers have successfully transitioned careers and secured their first coding jobs with the help of freeCodeCamp. Resources include:
- Comprehensive curriculum covering web design, algorithms and data structures
- Coding challenges and take-home projects
- Dedicated interview preparation section
Master Coding Platforms for Interviews
Coding platforms such as those above provide practical solutions to evaluate candidates' problem-solving skills, system design knowledge and soft skills, saving recruiters valuable time. These tests reduce interview rates by 50%. To choose the right platform for your organization, consider these points:
- Define your hiring goals by identifying the technical skills required.
- Find coding platforms that provide practical, job-specific challenges.
- Choose platforms with user-friendly interfaces and features such as integrated IDEs to improve the candidate experience.
- Take advantage of platforms with AI-based evaluations for accurate and unbiased assessments.
- Encourage candidates to use platforms such as freeCodeCamp to prepare.
Looking for more resources to build an incredible tech team? Explore Dice's recruitment and hiring services.
