Can a dev agency work alongside our existing in-house team rather than replacing them?

Yes, and this is often the best model for scale-ups. The agency handles the bounded build while your in-house team stays on the product roadmap. A clean handover means your team picks up ownership of the new tool once it is shipped. The key is agreeing upfront on how the two teams communicate, who owns decisions, and how code review works across the boundary.

What happens to the code and IP when we use an external dev agency?

This is governed by your contract. Any reputable UK agency should assign full intellectual property rights to you on completion and final payment. Make sure this is explicit in the agreement before work starts. You should also ensure the contract specifies that no proprietary third-party libraries with restrictive licences are included without your consent.

How do we avoid being left with unmaintainable code after an agency engagement?

Ask the agency to treat handover documentation as a named deliverable in the contract, not a verbal promise at the end. That should include a code walkthrough session with your team, written documentation of architecture decisions, and a clear README for running and deploying the application. Review the code quality before final sign-off — not after.

Is it ever worth hiring a contractor rather than using an agency or a permanent hire?

Yes, particularly if you need a single specialist skill embedded in your team for a defined period. A contractor (operating outside IR35, or inside if you go via an umbrella) sits between the two options: faster to onboard than a permanent hire, more embedded than an agency. The trade-off is that you are managing an individual rather than buying a deliverable, so the project management burden stays with you. For teams that already have strong technical leadership, contracting can work well.

How long does it typically take a dev agency to start delivering?

After an initial scoping phase, a well-run agency engagement can move into active development within a few weeks. Compare this to a permanent hire, where the time from posting a job advert to a new engineer shipping meaningful work is typically several months in the current UK market. The agency route is faster for bounded work precisely because the team is already assembled and the scope is defined before a line of code is written.

Hiring a Dev Agency vs Extending Your In-House Team: A Practical Comparison

If your existing dev team is stretched and you have a specific build to ship, bring in an external agency for that build rather than hiring permanent engineers into the team. Hiring is slow, expensive, and locks in headcount for work that may not recur. An agency delivers faster, carries its own overhead, and hands back something your team can maintain. That said, this is not a universal rule: if the work you need is core to your product and ongoing, the calculus shifts. Below is the full breakdown.

Why This Decision Matters More Than It Looks

Scale-ups in particular tend to reach this crossroads when an internal ops tool, integration, or MVP is blocking a team but the dev squad is already committed to the product roadmap. The instinctive answer is to hire. But a permanent hire in the UK takes several months from posting to productive output, and a mid-level software engineer commands a substantial salary before employer NI, pension contributions, and equipment costs are factored in. For a bounded, specific build, that maths rarely works in your favour.

Note

This page focuses on the scenario where you already have an in-house dev team but they are at capacity. If you have no in-house technical resource at all, the comparison looks different — the agency case becomes even stronger.

Head-to-Head Comparison

Factor	Dev Agency	Extending In-House Team
Time to first output	Weeks (after scoping)	3–6 months (hire to productive)
Fixed vs variable cost	Project or retainer — cost stops when work stops	Permanent salary, NI, pension, benefits
UK hiring market	Not your problem to navigate	Competitive; senior engineers are hard to find and retain
Specialist skills	Access to a ready-made team with varied expertise	One hire = one skillset; gaps remain
Knowledge retention	Risk: docs and handover quality varies by agency	Strong: stays in the building
Ongoing maintenance	Needs a clear handover plan	Natural fit if team is maintained
Accountability	Contractual deliverables	Managed via your own processes
Cultural fit	Lower — external relationship	High — embedded in your team
Scalability	Flex up or down per project	Slow to scale up or down
Best suited for	Bounded builds, MVPs, internal tooling	Long-term product ownership, core IP

The Real Cost of a UK Engineering Hire in 2026

A mid-level software engineer in the UK earns a competitive salary, and the total employment cost to a business runs meaningfully higher once employer National Insurance, pension auto-enrolment contributions, hardware, software licences, and onboarding time are added. Then factor in the opportunity cost: a poorly matched hire who leaves within twelve months is an expensive reset. None of this makes hiring wrong — it makes it the wrong tool for a bounded build.

Recruiters and LinkedIn ads add further cost on top. Many UK scale-ups report that a single engineering hire, end-to-end, costs tens of thousands of pounds before that person ships anything useful. An agency project with a clear scope and defined deliverables often comes in cheaper for a single build, with no trailing liability.

When Extending Your In-House Team Is the Right Call

There are clear scenarios where growing the team beats bringing in an agency. Be honest with yourself about which bucket you are actually in.

The work is ongoing product development on your core platform, not a discrete build
You need someone who will own a domain long-term and accumulate deep context over years
Your codebase is complex and proprietary, with a steep ramp-up that makes agency engagement impractical
You are at a stage of growth where engineering headcount itself signals maturity to investors or enterprise clients
You have already had a bad agency experience caused by poor knowledge transfer and want to internalise that risk

When a Dev Agency Is the Right Call

You need to ship a specific, bounded tool: an internal ops app, a client portal, an integration, an MVP
Your dev team is at capacity on the roadmap and cannot context-switch without causing damage
The project needs skills your team does not have and may never need again (e.g. a specialist data pipeline or a specific API integration)
You need something in production within weeks, not months
The build is an internal tool that needs to be maintainable by your team afterwards, not owned by an agency indefinitely
You want a fixed-scope, fixed-cost engagement with clear contractual deliverables

Tip

A useful test: ask whether the person you are considering hiring would still have a full-time role once this specific project is done. If the answer is uncertain, that is a signal the work is project-shaped, not headcount-shaped.

The Hidden Risk on Each Side

Both routes carry risks that are underweighted in most comparisons. With a hire, the underweighted risk is time-to-productivity: even an excellent engineer takes months to become genuinely useful in a new codebase, and the business absorbs that cost invisibly. With an agency, the underweighted risk is knowledge transfer quality: if the engagement ends without proper documentation, a handover session, and clean code, you have created a different kind of technical debt.

The way to mitigate the agency risk is to select a partner who treats handover as a deliverable in the contract, not an afterthought. Ask specifically: what does the handover include? Who on your team will be trained? What documentation will be produced? Any agency that cannot answer that clearly is a risk.

A Practical Decision Framework

Define the scope first. Is this a bounded project with a start and end, or ongoing work with no defined finish? Bounded = agency. Ongoing = hire.
Check your timeline. Do you need this in production within the next quarter? If yes, a hire will not get you there in time.
Audit the skills gap. Does this require a skillset your team will need permanently, or just for this build? One-off skills = agency.
Calculate total cost honestly. Include employer NI, pension, recruiting fees, and onboarding time in your hire cost. Compare that to a scoped agency engagement.
Assess your team's capacity to absorb a new person. Onboarding a hire takes senior engineer time. If your team is already stretched, a hire makes that worse before it gets better.

How Bedrock Team Fits Into This

Bedrock Team works specifically with UK businesses that need a custom app or internal tool built properly, without adding permanent headcount. We are a small, technical team: no bloated processes, no account managers in the middle, no over-engineering. We scope the work clearly, build it, and hand it back to you in a state your team can maintain. If what you need is a bounded build that your stretched dev team does not have capacity for, that is exactly what we do. Get in touch to talk through the scope.