Taking over a Laravel app: your first-week checklist

You already have a Laravel application. The next feature is waiting. Trouble starts when the previous developer steps away. Access is unclear. The app runs on one machine only. Payments, queues, and releases live in memory instead of notes. Then a small change turns into a week of guessing.

A proper handover answers three questions before new work starts. Do you control the systems you pay for? Can another developer run the app from the repository? Which flows can you change without breaking sign-in, payments, or customer work? This checklist follows that order. It helps you take over the project you have. It is not an argument for a rewrite.

1. Know what you actually own

The usual gap is simple. You received code, but not control. A zip file does not let you ship a fix, renew a certificate, change DNS, or recover the site after an old hosting login disappears.

Start here because the repository and production often differ. The folder someone sent you may not match what is deployed. The payment account or mail provider may still sit under someone else’s login.

What to do:

• Open the repository and read the commit history, not just a code snapshot.
• List hosting, the registrar, DNS, TLS, and the release steps. Move them to a company account you control.
• Name the owner of payments, email, file storage, error tracking, and SMS.
• Write down which branch is deployed, outside a single chat thread.

In one product company, from May 2024 to January 2026, the work included taking over weak and partly failed projects from other teams. Those production systems already had architecture and performance issues. The first step was always the same: see what was really running, then stabilize it. That was recovery of inherited applications, not a greenfield build and not an automatic rewrite.

2. Make sure the app can run elsewhere

A handover is incomplete if the app starts only on the previous developer’s computer. Hidden local packages, an undocumented environment file, or a database nobody else can rebuild stay invisible until that person is gone.

A second environment is the proof. If a clean setup fails, you find the missing step while someone can still explain it.

What to do:

• Build a separate environment from the repository and a written instruction. Note the first step that fails.
• Document required environment variables. Keep secrets out of the repository, tickets, and chat.
• Record migrations, queues, scheduled tasks, and frontend assets. Note any required queue worker or scheduler.
• Keep real customer data out of an unsecured test environment. Use a reduced or anonymized copy.
• Record whether tests and a delivery pipeline already exist.

That inherited-project work used CI/CD, Docker, and AWS. Do not copy that stack by default. Ask a simpler question: can your team ship a change without a ritual stored in one person’s head?

3. Review dependencies and critical flows

An app can run today and still be risky tomorrow. The next change may depend on an unchecked package. Or it may touch a payment path nobody has tested since the previous developer left.

Updating everything at once often becomes a rewrite in disguise. Ignoring the flows that take money or serve customers is how a small fix breaks sign-in or charges the wrong way.

What to do:

• Record Laravel, PHP, and the main packages, and note which ones still receive security fixes.
• Judge upgrades against this application. Do not refresh the lockfile only because a newer release exists.
• Walk through sign-in, payments, customer requests, and background jobs. Mark what is still untested.
• Restore a backup once in a separate environment.
• Fail one queued job and run it again. Confirm it does not repeat a payment, email, or report.
• If customers share one app, write down how one account’s data stays separate.
• For each external service, name the credential and what breaks when it expires.

In an agency engagement, from January to August 2026, call processing in a multi-tenant CRM used RabbitMQ jobs with idempotent processing and reliable error handling, so a retry did not create a second result. Ask the same question of your queues even if the broker is different. Branch databases there were isolated, and migrations and indexes supported that separation. Your app may use another model, but you still need a written answer: can one customer read another customer’s records? That workflow also connected AI processing, telephony, messaging, and accounting, then exposed results through reporting APIs.

4. Measure the slowness people already notice

A handover can look complete until real users hit a slow path. Then the team says only one thing: the site is slow. That is not enough. A slow page is often one query, one payload, or one missing index. Rebuilding the product for that reason sends the work in the wrong direction.

What to do:

• Name the page, export, or job people already wait on, and time it before any change.
• Look for a query inside a loop, a search without an index, and an API response larger than the page needs.
• Keep every number attached to the operation that produced it.

On a training platform with partner-service integrations, a loop of database queries was replaced with one aggregating query. That operation went from 12.41 seconds to 2.451 seconds, and memory use fell by 1.5 GB. Weekly average CPU load went from 82.2% to 2.75% after the bottlenecks, including missing search indexes, were addressed. A separate critical operation went from 23,937 ms to 48 ms. One API response went from 912 KB to 2.1 KB. Each figure belongs to that operation. None of them means the whole platform became a fixed number of times faster.

In another role, from January 2023 to May 2024, a UI freeze was removed and a critical process went from one hour to six minutes. Those results belong to that role, together with assessment, architecture, and technology selection for more than 20 projects. They are not statistics from the training platform. Measure the operation you change.

5. Turn findings into a practical plan

A weak audit ends as a long document. Or it turns into a broad claim that everything must be rewritten. In both cases, nobody owns the next step. Inherited systems can be stabilized. In one product company, lead work across several projects combined hands-on recovery with a clearer process: architecture and performance first, then AI-assisted feature development, refactoring, and code review. The stack included Laravel, TypeScript, Node.js, and Vue. The real decision was what to stabilize first, not whether to throw the application away.

What to do:

• Split findings into immediate risks, maintenance work, and later improvements.
• Name an owner and the check that proves the item is done.
• Agree what can wait until after the next feature.
• Do not start that feature until repository access, a second environment, and a tested restore are done.

When to bring in a specialist

You can run this process with the previous developer. You can also run it with someone who has never seen the code before. Bring in help when the repository and hosting are still not under your control, when the app will not boot from the notes, or when queues and the slow path are still unclear while the release date is already fixed.

I take on this handover and the development after it. Services covers performance work, SaaS and backend systems, and AI integration. Selected work keeps the recovery work, the measured improvements on a training platform, and the call-quality workflow in a multi-tenant CRM, each with the scope that result had. Take it item by item, or have the Laravel handover and support service walk the same list with you against the repository and hosting you actually have. If you want to review your repository, hosting, and the flow that worries you, write to me.