How to Write a Developer Brief That Gets You the Right Contractor

Most briefs for contract developers get one part right and one part wrong.

The part they get right is the technical requirement. Stack, seniority, years of experience. That part is usually clear because it is the easiest part to write down.

The part they get wrong is everything that determines whether the person you hire will actually work well inside your team. That part rarely makes it into the brief at all, because it is harder to articulate and easy to assume the recruiter will figure it out.

The gap between those two things is where a lot of contract placements go wrong. Not because the developer lacked the skills. Because the brief never described the job they were actually being asked to do.

Start with the gap, not the role title

A brief that says "we need a senior React developer" describes a skill set. It does not describe a problem.

The more useful starting point is naming the gap specifically. Is the team behind on a specific feature because of a skills shortfall, or because of a headcount shortfall, or because someone left and the work has nowhere to land? Is this a short sprint to clear a backlog, or the start of an ongoing programme that will need the same person for months?

Those are different jobs even if the technical stack is identical. A developer joining for three weeks to clear a backlog needs to be productive almost immediately with minimal ramp up. A developer joining for a six month programme has more room to learn the codebase properly but needs to integrate well with the team they will be working alongside every day.

Naming the actual gap, rather than defaulting to a role title, changes what a good match looks like.

Be specific about the stack, and specific about what specific means

Stack requirements are usually where briefs are most detailed, and even here there is a common gap: the difference between "we use React" and "we use React 18 with a specific state management pattern, TypeScript in strict mode, and a component library we have built in house that any contractor will need to learn."

The first version filters for people who have used React. The second filters for people who can actually be productive in your specific codebase within the timeframe you need.

If your stack includes anything unusual: a legacy system with particular quirks, an internal tool nobody outside the company has heard of, a specific version of something with breaking changes from what most developers are used to, say so directly. It is better for a shortlist to be smaller and accurate than large and speculative.

Describe how your team actually works

This is the part that gets skipped most often, and it matters more than most technical detail.

How does your team communicate? Is there a daily standup, or is it more asynchronous? Does code go through a formal review process with multiple approvers, or is it a lighter touch? Is the team distributed across time zones, and if so, what hours does a contractor need to be available for meaningful overlap?

These are not soft details. They determine whether a technically excellent developer will actually function well inside your team from week one. A developer used to async, low ceremony teams can struggle in a highly structured environment with frequent synchronous meetings, and the reverse is equally true. Neither is better. The mismatch is the problem.

If there is anything specific about how your team works that a contractor would need to adapt to quickly, put it in the brief. It saves everyone time and produces a better match.

State what AI tooling maturity actually looks like for this role

Most briefs now include something like "experience with AI tools preferred." That phrase does almost no useful filtering, because nearly every developer will say yes to it.

A more useful approach is describing what genuine AI Native competence would look like in the specific context of the role you are filling. If the codebase involves complex legacy systems where AI code generation carries real risk, say that the developer needs to understand when not to reach for AI assistance, not just how to use it. If the role is heavily weighted toward new feature development where AI assisted boilerplate and testing genuinely accelerates delivery, say that explicitly too.

The four signals worth asking about directly: does the candidate know what they do not use AI for, have they changed how they plan work rather than just how they type, do they have a verification habit before shipping AI assisted output, and can they describe a specific recent example where AI changed their outcome. A brief that asks for evidence against these signals, rather than a general AI competence checkbox, produces much better matches.

Name the constraint that actually matters

Every engagement has one constraint that matters more than the others: timeline, budget, a specific technical risk, an upcoming deadline that cannot move, a stakeholder who needs to be kept closely informed.

Briefs often list several constraints with equal weight, which makes it hard for anyone matching candidates to know what to actually optimise for. If the deadline is truly fixed and everything else is somewhat flexible, say that clearly. If the budget is the hard constraint and the timeline has some give, say that instead.

This single piece of information does more to produce a good shortlist than almost anything else in the brief, because it tells whoever is doing the matching what trade off to make when the perfect candidate does not exist.

Say what success looks like at thirty, sixty, and ninety days

A brief that defines success only at the point of hire ("we need someone who can do X") gives no way to check, partway through an engagement, whether it is actually working.

A better approach states what a good outcome looks like at specific points. At thirty days, the developer should be contributing independently to well scoped tasks. At sixty days, they should be trusted with more ambiguous work and be a source of input on technical decisions, not just execution. At ninety days, if the engagement runs that long, they should be someone the team would actively want to keep working with.

This does two things. It gives you a way to catch a mismatch early rather than three months in, and it gives the developer a clear sense of what is expected, which tends to produce better performance from people who are motivated to meet a clear bar.

What a complete brief actually contains

Put together, a brief that produces a good match covers:

The actual gap you are trying to fill, and whether this is a short engagement or an ongoing one.

The specific stack, including anything unusual, with enough detail that a candidate can self assess fit rather than guess.

How your team actually works, including communication style, review process, and time zone overlap requirements.

What genuine AI tooling maturity looks like for this specific role, not a generic checkbox.

The one constraint that matters most, so trade offs can be made sensibly.

What success looks like at meaningful checkpoints, so both sides know what they are working toward.

None of this needs to be long. It needs to be specific. A short, specific brief produces a better shortlist than a long, generic one, because it gives whoever is doing the matching something real to match against.