Coding skills, proven on real compilers.
Coding simulators in 35+ languages with real test cases, plus cloud, data, DevOps and AI skills. Scored automatically, the same way every time. Pick a language and run the code.







Every layer of the tech stack.
Programming
Java, Python, C#, C++, JavaScript, Scala, Go and more.
See testsSoftware development
Frameworks, APIs, testing and design patterns.
See testsCloud
AWS, Azure and Google Cloud services and architecture.
See testsDevOps
CI/CD, containers, Kubernetes and infrastructure as code.
See testsNetworking
Protocols, routing and network administration.
See testsCyber security
Application, network and cloud security practices.
See testsData science
Statistics, Python data tools and modeling.
See testsML algorithms
Supervised and unsupervised learning, evaluation.
See testsGenerative AI
LLM concepts, prompting and AI-assisted development.
See testsThe right format for each skill.
Coding simulators
Real compilers, default code stubs and multiple test cases.
Project-based
Multi-file projects for React, Angular and Java Spring Boot.
ExploreAI-assisted coding
See how engineers direct and review AI output.
ExploreLive coding interviews
Live coding, whiteboarding, async and bulk interviews.
Code you can trust.
Code replay shows whether code was typed gradually or pasted in at once. The Safe Assessment Browser blocks AI tools, copy and paste is disabled, and unusual completion times are flagged.
Built for both sides of talent.
The same evidence serves recruiting leaders and the teams who develop people.
Screen engineers on real work.
- Cut engineering time spent on early screening
- Score every candidate by the same rules
- Move the best to Tara or a project round
Certify technical skills at scale.
- Run internal certification programs
- Find skill gaps before projects start
- Re-assess after learning to prove progress
Start with a focused pilot.
One or two roles, or one team. We help you pick the assessments, run them with real people and compare the results with your current process.