“Hiring a developer to fix someone else's code is its own skill. The wrong hire will take your money, make confident noises, and hand you back something worse.”
What no one tells you before you post the jobWhy Finishing an MVP Is Harder Than Starting One
When you hire a developer to build something from scratch, the scope is defined by what you want to build. When you hire a developer to finish an existing MVP - especially one built with AI tools or no-code platforms - the scope is defined by what the previous work got wrong, what corners were cut, and what the new developer is willing to take responsibility for. That's a fundamentally harder brief, and most developers will underprice it at the proposal stage and overprice it at the invoice stage.
The honest reason is that inheriting someone else's codebase is unpleasant work. It requires reading code you didn't write, understanding decisions you weren't part of, and often cleaning up patterns you would never have chosen. Good developers will charge appropriately for this. Developers who underprice it either don't understand what they're getting into or will cut corners to make the numbers work.
Before you post a job listing, this post will help you understand what to look for, what to ask, and how to structure the engagement so you don't end up with a developer who takes two months, delivers a partial fix, and disappears.
Define the Scope Before You Talk to Anyone
The most common mistake founders make when hiring to finish an MVP is starting conversations with developers before they know what "finished" means. If you say "I need help with my app," you will get wildly different quotes from different developers because everyone is estimating a different thing. Before you talk to anyone, write down what done looks like.
Done might mean: the app is deployed on a stable infrastructure, auth is secure, the core user journey works end to end without errors, payments are processing correctly, and the app can handle 500 concurrent users without performance degradation. That's a scope a developer can estimate. "Make it better" is not.
- List every feature that is partially built and what percentage complete you estimate it is
- List every known bug in priority order
- State the target infrastructure (Vercel, AWS, GCP) and any compliance requirements
- Define your launch date and the minimum feature set required to hit it
- Note any external integrations (Stripe, Twilio, third-party APIs) that need to work
Where to Find Developers Who Do This Work
General freelance platforms like Upwork and Toptal will return hundreds of results for "React developer." Very few of them specialise in inheriting and rescuing AI-built or no-code apps. This is a specific skill set - it requires the ability to audit unfamiliar code quickly, identify risk categories, and communicate tradeoffs clearly to a non-technical founder.
Better sources for this kind of work are developer communities where Launch & Rescue is an acknowledged specialisation (certain Slack communities and Discord servers), referrals from founders who've been through the same process, and software studios that explicitly offer this as a service. Studios are often more expensive per hour than a solo freelancer, but they bring multiple specialisations (backend, frontend, DevOps) and continuity - if the lead developer gets sick, the project doesn't stop.
How to Evaluate a Developer Before You Hire
The most reliable signal from a developer candidate is how they talk about the audit phase. A developer who wants to jump straight to estimating the fix without reading your codebase is telling you they're going to guess at the scope. A developer who insists on a paid audit before committing to a fixed price is telling you they respect the complexity of the work. Hire the second type.
Ask every candidate this question: "Tell me about a time you inherited a codebase that had security problems. How did you find them and what did you do?" The answer should include specific examples of auth issues, API exposure, or data access problems they've seen and fixed. A developer who has genuinely done this work will have stories. A developer who hasn't will give you a generic answer about code review practices.
Structuring the Engagement to Protect Yourself
Never pay a fixed price for rescue work without a prior audit. The right structure is: phase one is a paid audit (typically 3 to 5 days) that produces a written report of what's broken, what needs to be fixed, and a time estimate for the remediation work. Phase two is the fix, priced against the audit findings. This structure protects you from developers who underestimate (or deliberately underprice) the scope.
Milestone-based payments are safer than weekly billing for this kind of work. Define 3 to 4 milestones with specific deliverables ("auth system passes review, all RLS policies active, no hardcoded secrets in repo") and tie payment to each milestone. This gives the developer an incentive to reach each milestone and gives you a clear exit point if the work isn't progressing.
Red Flags That Will Cost You
A developer who quotes a fixed price for the entire engagement in the first conversation hasn't understood the scope. A developer who refuses a paid audit and offers to "just jump in" is skipping the step that protects both of you. A developer who can't explain what they'll check in an auth audit doesn't know how to do one. And a developer who doesn't ask about your deployment environment, your current hosting costs, or your performance requirements isn't thinking about what production actually means.
The cheapest developer is almost never the right choice for rescue work. The right choice is a developer who clearly understands what they're walking into, charges accordingly, and can articulate the risk categories before they start. That kind of clarity at the beginning of an engagement is the strongest signal you'll get that the work will be done properly.
Zovintra's Launch & Rescue engagements are structured exactly this way: a fixed-cost audit first, a written report with all findings, and a clear remediation scope before any code is touched. If you've been burned by a previous hire or you want to know what you're actually dealing with before you hire, the audit is a safe and well-defined first step. Reach out and we'll scope it together.
