JavaScript
Interview Questions

Look for phased scaling approach — horizontal scaling, caching layers, database optimization, and JavaScript/React-specific patterns.

Should mention OWASP top 10 risks relevant to JavaScript and React, authentication, authorization, and input validation.

Tests data architecture skills — should consider query patterns, consistency requirements, and how React interacts with the data layer.

Look for JavaScript/React-specific code review criteria beyond generic best practices — framework conventions, performance gotchas, and security patterns.

Tests learning agility — look for structured learning approach, resource utilization, and ability to deliver while learning.

Look for professional communication — evidence-based advocacy, willingness to compromise, and focus on outcomes over ego.

Assess continuous learning habits — official documentation, community involvement, conferences, certifications, and personal projects.

Tests leadership potential — structured knowledge sharing, patience, and ability to adjust communication to skill level.

Look for understanding of JavaScript architectural patterns, design decisions, and trade-offs. Do they explain the 'why' behind choices?

Assess depth of hands-on React experience — architecture decisions, challenges faced, and solutions implemented.

Look for unit testing, integration testing, TDD/BDD awareness, and practical test coverage strategies.

Tests systematic debugging: profiling, identifying bottlenecks, measuring improvements, and preventing recurrence.

Assess understanding of state management approaches and ability to choose the right one based on application complexity.

Tests understanding of both React and Node.js — look for nuanced comparison based on use cases, not just features.

Assess real-world React experience — depth of knowledge, problem-solving, and results achieved.

Look for scalability thinking — performance considerations, user management, and Node.js-specific best practices.

Tests practical Vue.js knowledge — implementation steps, dependencies, and troubleshooting experience.

Reveals the candidate's specialization, passion, and ability to articulate the strategic value of their expertise.

Tests incident response: quick diagnosis of JavaScript/React-specific bottlenecks, scaling actions, communication, degraded mode options, and post-incident improvements.

Look for methodical environment comparison — config differences, React version mismatches, data state, and networking.

Should cover profiling first, then targeted JavaScript/React-specific optimizations: caching, lazy loading, query optimization, CDN, and code splitting.

Assess practical TypeScript proficiency — look for specific use cases, not just surface-level familiarity.

Look for integration patterns, error handling, data validation, and experience with REST/GraphQL APIs.

Reveals professionalism and efficiency — look for version control, code review, automation, and collaboration tools.

Tests analytical decision-making — should consider team familiarity, project requirements, long-term maintenance, and community support.