How to Work With an MVP Developer: 8 Rules That Prevent Disasters

The most common reason MVPs are late, over-budget, or wrong is not technical — it is communication. The working relationship between founder and developer determines the outcome more than any technical decision.

Need to define your product scope? Use our interactive Feature Prioritizer to filter your absolute must-haves, or apply for a complimentary Free MVP Scope blueprint designed by our Senior Architect.

Rule 1: Write the Scope Before You Sign Anything

A verbal agreement about "building a SaaS" is not a scope. "Building a SaaS" could mean 4 weeks or 4 months depending on assumptions. Before signing or paying a deposit, get a written feature list both parties agree on.

Rule 2: Milestone Payments, Never 100% Upfront

• 30–50% on project start
• 30% on functional prototype
• 20–30% on final delivery and handoff

This aligns incentives. The developer is motivated to hit milestones. You are protected because you never pay for work not yet delivered.

Rule 3: Daily Async Updates (Not Daily Meetings)

Daily 30-minute meetings cost 2.5 hours per week in billable developer time for status updates. Instead, require a brief daily async Slack update:

• What was completed today
• What will be worked on tomorrow
• Any blockers

5 minutes to write, full visibility for you.

Rule 4: See Working Software, Not Screenshots

Screenshots of in-progress work are not progress. Ask for a staging URL at the end of each week. Test the actual working software in a browser. If you cannot test it, it is not done.

Rule 5: Own the Repository From Day One

Your GitHub repository should be in your account, with the developer as a contributor — not the other way around. If the developer owns the repo and the relationship ends badly, you may not be able to access your own code.

Rule 6: Define "Done" for Every Feature

"The login feature is done" is not done unless:

• It works on desktop Chrome, Safari, Firefox
• It works on mobile iOS Safari and Chrome Android
• Edge cases are handled with appropriate messages
• It is deployed to staging

Rule 7: Scope Changes Get Written Down and Repriced

Every "can we also add..." is a scope change. The rule:

Write it down

Acknowledge it as a change to original scope

Confirm cost and timeline impact before building

What Good Updates Look Like

A weak update says, "Worked on auth." A useful update says, "Email verification is deployed to staging. Password reset is blocked because Resend DNS is not verified. Need founder to add two DNS records by 4pm." The second version tells you what changed, what is blocked, and who owns the next move.

Ask for links whenever possible: staging URL, pull request, Loom walkthrough, ticket, or screenshot of the error. This is not micromanagement. It creates a trail that helps you see progress without turning every day into a meeting.

Rule 8: The Handoff Is a Deliverable

The project is done when you have:

• Full access to the GitHub repository
• README documentation covering setup and deployment
• All service credentials transferred to your accounts
• A 30-minute walkthrough call explaining the architecture

Undocumented code that only one person understands is a liability — especially when hiring a second developer.

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Written by Milad Kalhur *Founder & Chief Architect at Needmvp* Milad has designed, architected, and shipped over 40+ web applications for Y Combinator founders and VC-funded startups. Having pioneered the 3-week fixed-price MVP model, he actively consults on software development efficiency, database modeling, and high-performance serverless architecture.