Stop losing engineering hours to LeetCode trivia and resume inflation. ConceptNinjas pairs realistic scenario codebases, conversational AI interviews, and tamper-proof proctoring so your engineering leadership evaluates genuine production ability.
// Production Scenario: Token Bucket Rate Limiter
// Handles burst traffic & distributed Redis locking
export class DistributedRateLimiter {
private redis: RedisClient;
async consumeToken(key: string, capacity: number): Promise<boolean> {
const [tokensLeft, timestamp] = await this.redis.eval(LUA_SCRIPT, [key]);
return tokensLeft > 0;
}
}
In Service Since 2019 • Trusted by Engineering Teams Worldwide
Everything your engineering leadership and recruitment panels need to evaluate deep problem-solving skills, conduct conversational screening, and maintain uncompromised test integrity.
Tired of candidates who ace algorithmic brainteasers but can't navigate a messy production repo? ConceptNinjas tests engineers in realistic multi-file environments where they fix actual bugs, optimize slow SQL queries, and implement robust endpoints.
Conduct automated first-round conversational screens 24/7. The bot probes technical answers, asks relevant follow-up questions, and delivers scored transcripts before your engineers step in.
“Probes edge cases, concurrency tradeoffs, and architectural justification in real-time.”
Controlled AI playgrounds and sandboxes. Evaluate how candidates work with modern AI tools, craft optimal prompts, and integrate LLM APIs securely.
Assess critical thinking and validation skills when developers collaborate with AI models.
Ultra-low latency sandboxed execution environments. Evaluate candidate runtime efficiency, memory usage, and time complexity with hidden test benchmarks.
Dual-screen detection, webcam facial verification, tab-switch penalties, and AST code similarity prevent AI fraud and LeetCode copy-pasting.
Whether you need fast asynchronous screening, comprehensive multi-file coding projects, or team culture alignment, ConceptNinjas provides a purpose-built tool.
Stop testing LeetCode riddles that bear zero resemblance to daily engineering work. Scenario-Based Assessments immerse developers in full multi-file codebases where they diagnose production bugs, build API routes, and optimize live queries.
92%
Better On-the-Job Fit
45%
Reduction in Regret Hires
Assessments Delivered Globally
Trusted by engineering teams worldwide since 2019
Engineering Hours Saved
Average reduction in interviewer panel load
Faster Shortlist Turnaround
Accelerated from weeks to days
Candidate Verification Accuracy
Anti-cheating & proctoring integrity
“From an employer perspective, ConceptNinjas transformed how we run volume campus hiring and lateral engineering screens. The complexity and depth of questions are top tier, automated rating sets an immediate benchmark, and our engineering panels no longer spend weekends screening candidates.”
Reduction in Screening Time
Faster Shortlist Turnaround
Automated Evaluation
Talent Acquisition Leadership
Softtek Global Technology Services
Key Outcomes Achieved:
Built specifically for organizations that cannot afford bad hires or endless interview loops. We give you a standardized, reliable hiring command center.
SOC-2 ready workflows, GDPR-compliant candidate data retention, and isolated sandboxed code execution.
Evaluates not just whether candidate code passed unit tests, but their algorithmic complexity, readability, and reasoning.
Candidates take assessments and AI interviews across any time zone without waiting on recruiter calendar slots.
Easily configure multi-stage filters: from baseline MCQs to scenario coding, psychometrics, and automated bot screens.
Dynamic question randomization, webcam monitoring, dual-screen detection, and AST-level code similarity analysis.
Share benchmarked candidate profiles, review code execution timelines, and align team feedback in one dashboard.
Generate instant PDF and web summaries with clear skill breakdowns, strengths, and role recommendation flags.
Compare applicant performance against percentile benchmarks across 10,000,000+ historical assessments delivered since 2019.
Real feedback from enterprises, technology agencies, and scaling engineering teams that rely on ConceptNinjas daily.
“From an employer perspective, ConceptNinjas is exceptional. We utilize it for technical screening during high-volume campus and lateral hiring. The complexity and depth of questions are outstanding, test results are delivered instantly, and the rating benchmarks save our technical panels hundreds of hours.”
Talent Acquisition Head
Clear answers to common questions about our technical evaluations, anti-cheating measures, and AI screening workflows.
Have questions about custom multi-file scenarios, enterprise ATS integration, or volume pricing?
Join thousands of engineering managers and recruiters who screen with certainty, cut panel fatigue, and hire top developers in record time.
