Use these Laravel developer interview questions to separate junior from senior candidates fast. Real questions, red flags, and hiring signals from Devlyn.ai.

Laravel developer interview questions to separate junior from senior

A junior developer can Google a Laravel interview question and give you a textbook answer in 30 seconds. I’ve watched it happen in live interviews. The candidate pauses, their eyes move slightly, and they recite the official documentation definition of Eloquent ORM.

That’s not how you find a senior engineer.

After building the hiring infrastructure at Devlyn.ai, where we screen hundreds of Laravel developers and place only senior engineers with founders building serious products, I’ve learned that the right interview questions don’t test knowledge. They test judgment. And judgment is the one thing a junior developer cannot fake.

This guide gives you the exact questions we use at Devlyn.ai to separate developers who know Laravel from developers who have built production Laravel systems under pressure. I’ll also show you what strong versus weak answers look like, so you can calibrate your own scoring.

Why most Laravel interview processes fail

The typical Laravel interview goes like this: ask about Eloquent relationships, service providers, and middleware. The candidate answers correctly. You make an offer. Six weeks into the project, they’re asking questions that a senior developer would never ask. The architectural decisions they’re making create debt you’ll spend months fixing.

The problem is that most interview questions test recall, not reasoning. Any developer who has used Laravel for 12 months can tell you what a service provider is. Almost none of them can tell you when NOT to use a service provider, or what they’d do if a service provider was being abused in a codebase they inherited.

Seniority shows up in the edge cases, tradeoffs, and mistakes. That’s where the questions below focus.

Core laravel developer interview questions (junior vs senior)

Question 1: What is N+1 problem in Eloquent and how do you fix it?

What a junior says: “N+1 is when you load a collection and then query for each item in a loop. You fix it with eager loading using with().”

What a senior says: They give the same explanation, then go further. “The real question is why N+1 happens in production when it didn’t in development. Usually it’s because the relationship was eager loaded in the controller but a Blade partial or a job later accesses the relationship without the eager load context. I use Laravel Debugbar in development and the query log in staging to catch these before they hit production. In high-traffic scenarios, I’ll also add a database query count assertion to my Pest test suite to prevent regressions.”

What to listen for: Whether they connect the theory to a real debugging scenario. Senior engineers have solved this problem in production, not just in a tutorial.

Question 2: You inherit a Laravel codebase with fat controllers. Every controller method is 200 lines. How do you approach it?

This question has no right answer. That’s the point.

What a junior says: “I would refactor the controllers to use service classes.” They stop there.

What a senior says: “First, I wouldn’t immediately refactor anything. I’d read the codebase for two or three days, run the test suite (if there is one), and understand why the fat controllers exist. Sometimes they exist because there was never time to refactor. Sometimes they exist because a previous developer tried service classes and abandoned them for a reason I need to understand. Once I have that context, I’d write tests for the critical paths before touching a line of code. Then I’d extract service classes one controller method at a time, starting with the most tested path, not the most complex one.”

What to listen for: “I would not immediately refactor anything” is the senior signal. Juniors want to fix things immediately. Seniors understand the cost of reckless refactoring in production systems.

Question 3: When would you NOT use Eloquent?

This is the question that sorts developers fastest.

What a junior says: Usually blank. Or: “I always use Eloquent.”

What a senior says: “Eloquent is excellent for most CRUD operations and relationship-heavy queries. I’d reach for the Query Builder directly when I need to run a complex aggregation or reporting query where Eloquent’s ORM overhead matters, typically on tables with millions of rows. I’d use raw SQL when I’m doing something Eloquent can’t express cleanly, like a recursive CTE or a complex window function. I’d also avoid Eloquent in batch operations, like processing 50,000 rows in a queue job, where I’d chunk with the Query Builder and avoid loading models at all.”

What to listen for: Specificity. If they can’t name a concrete scenario where they chose not to use Eloquent, they haven’t built systems at scale.

Mini-story: the question that saved a client $40,000

In October 2025, we were helping a US e-commerce founder, David, hire a senior Laravel developer for his team. David had a candidate who sailed through three rounds of standard Laravel interviews: clean answers on Eloquent, good understanding of queues, solid on authentication.

We asked this candidate: “Tell me about the worst performance problem you’ve encountered in a Laravel application and how you identified the root cause.”

The candidate described a slow page load and said they “added an index to the table.” That was the extent of the story.

A senior engineer’s version of that answer includes the profiling tool used, the specific query identified, why the index was chosen over other solutions, and what they monitored after deploying the fix to confirm it worked.

David passed on this candidate. Two months later, the same candidate was hired by a company David knew. They had to be let go after four months for consistently missing performance requirements. The interview question saved David roughly $40,000 in hiring cost and project delays.

The lesson: ask for stories, not definitions. Stories reveal the depth of someone’s experience.

Laravel-specific technical questions by seniority level

Questions for junior to mid-level candidates (1-3 years)

These questions test whether the candidate has genuine Laravel experience, not just tutorial knowledge.

Explain the difference between hasMany and belongsToMany. Give me a real example from a project you’ve built.
What’s the difference between Route::resource() and defining routes manually? When would you choose one over the other?
What is a Form Request and why would you use it instead of validating in the controller?
Walk me through what happens when a Laravel job fails. What’s the default behavior and how can you customize it?
What is the difference between Session, Cache, and Cookie in Laravel? Give me a scenario where you’d use each.

What strong junior answers look like: They give accurate answers with at least one concrete example from something they built. Weak answers are accurate but abstract, taken straight from documentation.

Questions for senior candidates (4+ years)

These questions test architectural judgment, not just feature knowledge.

You’re building a multi-tenant SaaS with Laravel. Walk me through your approach to data isolation between tenants.
Your application is getting 10,000 requests per minute and the queue workers are falling behind. What are your first three diagnostic steps?
Describe a situation where you had to make a hard technical decision that you later learned was wrong. What was it and what did you do?
How do you handle API versioning in a Laravel application that multiple clients depend on?
You’ve been asked to reduce database query time for a critical endpoint by 60%. The endpoint currently takes 800ms and hits 12 queries. Walk me through your approach.

What senior answers look like: They don’t give you the optimal solution immediately. They ask clarifying questions (what’s the traffic pattern, what’s the database size, what’s the infrastructure). They describe their diagnostic process before their solution. Juniors jump to solutions; seniors start by gathering information.

Red flags in Laravel developer interviews

These signals consistently predict poor hires in my experience at Devlyn.ai.

Red flag 1: They’ve never written a failing test Ask: “Tell me about a bug that a test caught before it hit production.” If they look uncomfortable or say they “don’t really write tests,” stop the interview. In 2026, a senior Laravel developer who doesn’t write tests is not a senior developer.

Red flag 2: They can’t explain a bad decision they made Ask: “Tell me about a technical decision you made that you’d make differently today.” A senior engineer has made mistakes, knows what they were, and can explain what they learned. A candidate who can’t answer this question hasn’t reflected on their own growth.

Red flag 3: They know Laravel but not PHP Ask: “What PHP 8.3 features have you used recently and why?” Laravel is built on PHP. A senior Laravel developer understands fibers, enums, intersection types, and the PHP release cycle. If they can’t name a PHP 8.x feature they’ve used intentionally, they’re framework-dependent, which creates blind spots in production.

Red flag 4: They’ve never deployed a Laravel application This is more common than you’d expect. Some developers work exclusively in local environments or hand off to DevOps. But a senior developer should understand deployment: what php artisan optimize does, how config:cache and route:cache work, what happens to queued jobs during a zero-downtime deployment.

Mini-story: the senior developer who revealed himself in 90 seconds

In March 2026, we were screening for a client building a healthcare data platform that needed a Laravel developer with serious production experience. The first question I asked was: “What was the last production incident you were involved in and what was your role in resolving it?”

The candidate, Rohan, answered immediately. In January 2026, a database migration on his team had locked a critical table during peak hours. He described the specific table locking behavior in MySQL 8 versus PostgreSQL, the rollback strategy they used, and the changes made to the deployment process afterward. He named the monitoring tool (Datadog) and the specific alert that fired first.

That 90-second answer told me more about Rohan’s seniority than three rounds of technical questions. We placed him with the healthcare client the following week. He’s still there.

The lesson: production incidents are the best proxy for seniority. Anyone who’s operated a real system at scale has stories. Get them to tell those stories early.

The coding exercise that actually works

Most coding exercises for Laravel developer interviews are either too easy (CRUD endpoints a junior can build in 20 minutes) or too hard (architecture problems that take days to do properly).

The exercise we’ve standardized on at Devlyn.ai for senior candidates:

The task: Given a simple Laravel application with a known N+1 issue, a missing database index, and a poorly written service class with no tests, identify and fix all three problems in 90 minutes. Write a Pest test for the service class after refactoring it.

What this tests:

Profiling and diagnostic skills (finding the N+1 and missing index)
Refactoring judgment (not rewriting more than necessary)
Testing discipline (writing the test, not just the fix)

What we’re not testing: Whether they can build a CRUD endpoint. Any candidate worth considering already can.

The 90-minute constraint matters. A senior developer triage problems quickly. A junior developer spends 45 minutes on the first issue and runs out of time.

How Devlyn.ai screens for exactly this

At Devlyn.ai, we’ve run this process on hundreds of Laravel developer candidates. Our senior-only model means we pass on the majority of applicants, including developers who pass standard technical screens but fail our judgment-based questions.

Every engineer we place with a founder has passed the production incident question, the “when would you not use Eloquent” question, and the practical debugging exercise. We’ve also developed a technical assessment that mirrors real project conditions, not toy problems.

If you’re hiring a senior Laravel developer and don’t have the internal capacity to run this kind of screen, hire through Devlyn.ai and skip the screening process entirely. You get a pre-vetted senior engineer with proven Laravel production experience, not a candidate who interviewed well.

What to ask about AI tool proficiency in 2026

This is new but important. In 2026, a senior Laravel developer should be using AI tools to accelerate their work. How they use those tools tells you a lot about their judgment.

Ask: “What AI tools do you use in your Laravel development workflow and what do you NOT trust them for?”

What a thoughtful senior says: They name specific tools (Cursor, GitHub Copilot, Claude Code) and specific use cases (generating boilerplate, explaining legacy code, writing test cases). Then they explain what they don’t trust: architectural decisions, database schema design, security-sensitive code without manual review.

What’s concerning: “I use ChatGPT for everything” with no sense of where the judgment needs to stay with the human developer. Or “I don’t use AI tools” with no explanation, which in 2026 suggests they’re not investing in their own productivity.

Senior developers understand that AI tools are accelerants for experienced engineers, not replacements for experienced judgment. A developer who hasn’t figured this out yet isn’t at senior level.

For a deep dive on AI tools that senior Laravel developers use, read my breakdown on the best AI tools for Laravel development at Laracopilot.

The short version: questions that matter most

If you only have 45 minutes and need to separate junior from senior fast, ask these five:

Tell me about a production performance problem you diagnosed. Walk me through your process from first alert to fix.
When would you NOT use Eloquent? Give me a concrete example.
Tell me about a technical decision you’d make differently today.
You’ve inherited a codebase with no tests. What’s your approach for the first 30 days?
What do you use AI tools for in your workflow, and where do you not trust them?

A senior engineer answers all five with specifics, tradeoffs, and personal examples. A junior engineer answers with generalizations and theory.

For the full hiring process, including how to evaluate candidates’ code, reference checks that actually reveal problems, and offer structures that attract senior engineers, read how to hire a senior Laravel developer on the Devlyn.ai blog.

The bottom line on laravel developer interview questions for junior vs senior

The best interview questions for separating junior from senior Laravel developers don’t test knowledge. They test judgment, and judgment only comes from production experience.

Ask for stories about production incidents, profiling sessions, bad decisions, and architectural tradeoffs. Stop asking for definitions. Stop giving toy coding exercises. Give them a broken real-world scenario and watch how they diagnose it.

If you want to skip the screening process and hire a pre-vetted senior Laravel engineer, get a free technical consultation through Devlyn.ai. We’ve done the screening so you don’t have to.

Alpesh Nakrani is VP of Growth at Devlyn.ai, a senior-only AI-enabled developer hiring service, and Laracopilot. He writes about Laravel, SaaS growth, and technical hiring at alpeshnakrani.com.