How to Hire a Full-Stack Developer in the UK (2026 Guide)

Step 1: Define what you're actually hiring for

Most hiring mistakes start before the first conversation. "We need a full-stack developer" describes a skill set, not a job. Write down the outcome instead: what needs to exist, who will use it, when it needs to be live, and which systems it has to connect to (payments, CRM, accounting, an existing app).

Then decide which of these three situations you're in, because each points to a different hire:

• A defined build: a new web app, MVP, or portal with a clear scope. This suits a fixed-price project. See MVP development or web app development.
• Ongoing product work: a live product that needs continuous features, fixes, and improvements. This suits a retainer or, at scale, a permanent hire.
• Overflow capacity: an agency or team with more work than people. This suits hourly or white-label development.

Step 2: Choose the right hiring model

In the UK you have four realistic routes. The right one depends on how much work there is, how long it lasts, and whether you have someone technical to manage it.

If you're weighing costs, our full-stack developer cost guide breaks down UK hourly rates, project prices, and the true cost of an employee once National Insurance, pension, and recruitment fees are added.

Step 3: Know where to find full-stack developers

• Referrals: ask founders, agencies, and accountants who they've used. A developer who has shipped for someone you trust is the lowest-risk starting point.
• LinkedIn and job boards: best for permanent roles; expect a longer process and plenty of screening.
• Freelance marketplaces: fast access to a large pool, but you do the vetting and quality varies widely.
• Developer studios and agencies: pre-vetted capacity, a single contract, and someone accountable for delivery.
• Local tech communities: meetups and startup networks in cities like Glasgow, Edinburgh, Manchester, and London.

Step 4: Vet skills on real, shipped work

A CV tells you what someone has been near. Shipped work tells you what they can do. Look for live products you can click through, ideally ones where the developer built both the interface and the backend.

Questions worth asking every candidate:

1. Show me something you built end to end. What did you do on the frontend, backend, and deployment?
2. How would you structure the data for our product?
3. How do you handle authentication, payments, and user data securely?
4. How do you test and deploy changes without breaking production?
5. What would you cut from our feature list for version one, and why?
6. How and how often will you show us progress?
7. What happens if you're ill or unavailable for two weeks?
8. Who owns the code, the repository, and the hosting accounts?

For anything substantial, a short paid trial task (a few hours on a real, self-contained piece of work) tells you more than any interview: code quality, communication, and whether they ask good questions.

Step 5: Spot the red flags early

• A quote with no breakdown, milestones, or assumptions.
• Reluctance to put the code in a repository you own.
• No live work to show, only screenshots or templates.
• Agreeing to every feature without questioning scope or timeline.
• Vague answers on security, backups, or how they deploy.
• Hosting or domains registered in the developer's name, not yours.

Step 6: Get the contract right (IP, IR35, and ownership)

Two UK-specific points catch people out.

Intellectual property. Under the Copyright, Designs and Patents Act 1988, code written by an employee in the course of their job belongs to the employer. Code written by a freelancer, contractor, or agency belongs to them unless the contract assigns it to you in writing. Paying the invoice is not enough. Make sure your contract includes a clear IP assignment.

IR35. If you engage a contractor through their own limited company, the off-payroll working rules (IR35) may apply. Since April 2021, medium and large private-sector clients must decide whether the contractor is effectively an employee for tax purposes; small companies leave that decision to the contractor. Engaging a business that delivers a defined outcome is generally lower risk than hiring an individual to work like a member of staff, but take advice if you're unsure.

Every development contract should also cover:

• Scope, milestones, and what "done" means for each one
• Payment terms tied to milestones
• IP assignment and confidentiality (an NDA if needed)
• Repository, hosting, and domain accounts held in your name
• A bug-fix period after launch
• Handover: documentation and access if you change developer

Step 7: Onboard and manage for momentum

Give your developer access on day one: repository, hosting, design files, and any existing documentation. Agree one place for requests (a shared board or Slack channel) and a regular demo, weekly or at each milestone. Keep a "version two" list so new ideas don't derail the current build.

If you'd rather skip the search entirely, Unlimited Dev provides full-stack development for startups, SMEs, and agencies from £50 per hour or fixed project prices from £1,500, with the code and accounts in your name from the start.

Hiring checklist

• Outcome, deadline, and integrations written down
• Hiring model chosen to match the workload
• Shortlist built from referrals and live work
• Candidates asked the eight questions above
• Paid trial task completed
• Contract with milestones, IP assignment, and handover terms signed
• Repository, hosting, and domain in your name
• Weekly demos booked

Frequently asked questions