Hire Kotlin and Android Developers in the UK

Yes, gradually. Kotlin and Java compile side by side in the same module, so we convert the code that changes most first, add tests as we go and keep releasing. Stable code nobody touches can stay in Java; the value is in the parts you are still building on.

For new screens, yes: Compose is Google’s recommended UI toolkit, and UI code ends up shorter and easier to test. Existing XML screens can stay until they need real changes, because Compose and views work together in the same app — there is no big-bang switch.

We agree a device matrix from your analytics — the Android versions, manufacturers and screen sizes your users actually have — then combine emulators, a cloud device lab and physical phones, including budget models. Crash and ANR data in Play Console shows where to look next.

Google raises the minimum target API level every year, and apps that fall behind stop being offered to new users on newer Android versions. The work is usually a set of focused changes — permissions, background and notification limits, edge-to-edge layouts, library updates — which we scope well before the deadline.

Kotlin and Android developer rates at Techsleight Labs start from £23/hour for flexible work and from £3,300/month for dedicated monthly capacity. Fixed-price Kotlin and Android projects are quoted after discovery, once scope, integrations, risks, and timeline are clear.

Most Kotlin and Android engagements start within 5–7 working days of sign-off, and urgent work can sometimes start within 48–72 hours. For larger projects, we first confirm scope, architecture, milestones, and the right senior engineer fit before kickoff. We support UK teams with written updates, planned demos, and timezone-aware handover.

Yes. You can hire a single Kotlin and Android developer, add a small pod with QA and DevOps, or ask us to manage the complete project. We match the model to your current team, delivery pressure, and budget.

Yes. Our hiring pages are built around senior production engineers, not junior bench resources. Every developer is reviewed for commercial project experience, communication quality, code quality, testing habits, and ability to work inside existing teams.

Yes. We often join existing Kotlin and Android projects to fix performance, unblock releases, add features, improve test coverage, or modernise architecture. We start with a codebase review so the first sprint is practical rather than theoretical.

Tell us early. We will look at the cause with you — the brief, the onboarding or the match — and agree the next step together, such as more technical oversight, a different engagement model, or ending the engagement on the notice terms in your contract. The goal is a useful working relationship, not lock-in.