Technical Assessments
Take the guesswork out of technical hiring
Move past resumes to see how candidates actually apply their technical skills in realistic, job-relevant scenarios.
Assess critical technical skills from the get-go
Evaluate technical ability with realistic environments, expert-built assessments, and safeguards you can trust.
Confident decisions. Better teams.
Hire faster, fairer, and based on proven skills with CodeSignal.
Broader reach
Evaluate more candidates earlier with automated pre-hire assessments that scale without increasing recruiter workload.
Fairer hiring
Reduce bias and uncover overlooked talent with skills-based scoring applied equally across every candidate.
Stronger signal
See how candidates actually solve problems in practice, not just how they perform in interviews.
Trusted results
Rely on validated assessments and built-in safeguards that protect the integrity of outcomes.
The results speak for themselves
CodeSignal customers improve speed, quality, and confidence at scale, across every stage of the skills journey.
skill evaluations completed on CodeSignal
of hours saved from manual processes
more applicants evaluated on average
higher offer likelihood for candidates who pass assessments
Coverage across every technical role
From programming languages to system design, data, and AI, CodeSignal supports it all.
Languages
Skills
Question types
Roles
Coding
- C
- C#
- C++
- Clojure
- CoffeeScript
- Common Lisp
- D
- Dart
- Elixir
- Erlang
- F#
- Fortran
- Free Pascal
- GNU Octave
- Go
- Groovy
- Hack
- Haskell
- Java
- JavaScript
- Julia
- Kotlin
- Lua
- ENim
- Objective-C
- OCaml
- Perl
- PHP
- Python 2
- Python 3
- R
- Ruby
- Rust
- Scala
- Smalltalk
- Swift
- Tcl
- TypeScript
- Visual Basic
Database
- Microsoft SQL
- MongoDB
- MySQL
- PostgreSQL
- Shell
- Bash
- PowerShell
- Programming fundamentals
- Computer Science fundamentals
- Software development practices
- Software design and architecture
- System design and architecture
- Debugging and troubleshooting
- Security fundamentals and secure coding practices
- API design, integration, and development
- Server-side programming and back-end development
- Deployment, cloud infrastructure, and DevOps
- Containerization and orchestration
- Monitoring and observability
- Performance optimization and scalability
- Relational databases and SQL
- Data storage and management
- Data querying and retrieval
- Data cleaning and preprocessing
- Exploratory data analysis and visualization
- Mathematics and statistics
- Machine learning fundamentals and core principles
- Machine learning and predictive modeling
- Model evaluation, validation, and selection
- Model deployment and serving (MLOps)
- Large language models (LLMs)
- Data privacy, ethics, and governance
- …and more
- Bug fix
- Conversation
- Filesystem
- Filesystem Frontend
- Matrix
- Output only
- Progressive Filesystem
- Progressive Filesystem Front-end
- Progressive Single Function
- Quiz
- Recovery
- Simple Front-end
- Single-Function
- SQL
- Whiteboard
- Writing
- Early Talent
- Back-end Engineer
- Front-end Engineer
- Full-stack Engineer (back-end heavy)
- Full-stack Engineer (front-end heavy)
- Quality Assurance Engineer
- Software Engineer in Test
- Mobile Engineer – iOS
- Mobile Engineer – Android
- Mobile Engineer – React Native
- Software Architect
- Database Administrator
- Data Analyst
- Data Scientist
- Machine Learning Engineer (data focus)
- Data Engineer
- Big Data Engineer
- Prompt Engineer
- NLP Engineer
- AI Research Scientist
- CUDA/GPU Kernels Engineer
- DevOps Engineer
- Site Reliability Engineer
- Cloud Platform Engineer
- (AWS) Cloud Platform Engineer
- (GCP) Cloud Platform Engineer
- (Azure) Cybersecurity Analyst
- …and more
Popular technical assessments
Get started with the assessments teams use most across engineering, data, and system design roles.
Real teams getting real results
Discover how Instacart, Nextdoor, and other innovators use CodeSignal to hire smarter, learn faster, and grow stronger.
By incorporating CodeSignal into our process and having a large number of folks opt into it, either passive candidates or applicants, we’re able to free up roughly 40 to 60% of our engineers’ time.
Michael Leggett
Tech Recruiter at Outreach
Partnering with CodeSignal has helped us to manage a very high volume of interest from candidates in our process and quickly assess their technical acumen, without using a ton of engineering hours.
Nadia Abouzaid
Head of Diversity Talent Programs at Asana
CodeSignal’s experiential learning platform fast-tracks skill mastery beyond what’s possible with traditional methods. It’s next-gen AI learning done right.
Josh Bersin
Josh Bersin Company
Works where you work
Book a demo
Ready to hire based on proven skills?
Explore more
CodeSignal helps you evaluate more than technical skills, so you can hire, develop, and grow teams with confidence.
AI skills assessments
See how candidates work with AI in practical, job-relevant scenarios, from understanding the basics to applying AI in real tasks.
Behavioral assessments
Understand how people prefer to work and collaborate, so you can hire for team fit as well as technical ability.
Technical courses
Build technical skills through hands-on practice and real problem solving, with feedback that supports learning and growth on the job.
Resources
ebook
The Technical Hiring Playbook
This playbook will take you through how you can improve your technical hiring funnel to meet your headcount goals for all levels of engineers.
ebook
AI for Talent Teams: What to Do First (and What to Do Next)
This ebook will help you identify where AI can have the most impact for your team so you can decide what to do first and where to go next.
ebook
Playbook: Leveraging AI for a Human-Centric Hiring Process
This guide from CodeSignal and Ashby is your roadmap to integrating AI into your hiring processes while maintaining a human-centric approach.
Frequently asked
questions
What is a technical assessment?
A technical assessment is a skills-based evaluation that measures a candidate’s coding ability through hands-on challenges. CodeSignal assessments provide a real-world IDE where candidates write, build, run, and debug code, showing how they actually work, not just what’s on their resume.
How does CodeSignal prevent cheating?
We use multiple security layers: Suspicion Score technology flags suspicious behavior patterns, full-service proctoring with ID verification monitors sessions, dynamic question rotation provides thousands of variations, IP address tracking, the option to disable copy/paste functionality, and our Leak Sweep system that monitors the internet for leaked content.
Does CodeSignal integrate with our ATS?
Yes, we integrate with all major applicant tracking systems including Greenhouse, Lever, Workday, iCIMS, SmartRecruiters, JazzHR, and others. Send assessments directly from your ATS and automatically sync results to candidate profiles.
What ROI can we expect from CodeSignal?
Organizations typically see 40-60% reduction in engineering interview time, ability to evaluate 2-4x more candidates, and thousands of hours saved annually. Candidates who pass assessments are 4-6x more likely to receive an offer and demonstrate stronger job performance.
What is the difference between CodeSignal and HackerRank?
CodeSignal offers Certified Assessments validated by IO psychologists (2,800+ hours of research each) and advanced anti-cheating technology including Suspicion Score and Leak Sweep. Our platform also includes AI-Assisted Assessments with Cosmo and seamless ATS integrations for a complete hiring solution.
Can candidates use AI during technical assessments?
This depends on your configuration. Traditional assessments prohibit unauthorized AI use and detect AI-generated code. We also offer AI-Assisted Assessments with Cosmo, our integrated AI assistant, so you can evaluate how candidates leverage AI tools, a critical skill for modern developers.
How quickly can we implement CodeSignal?
Most teams are fully operational within a few weeks. Select pre-built Certified Assessments (no question creation needed), integrate with your ATS, customize your settings, and start sending invitations. Our customer success team provides full onboarding support throughout the process.