Seven senior React Native engineers, already used to working together, to build, rescue and scale demanding mobile products. You talk directly to the people who write the code.
already in the repos of
2015on React Native since day one
100+apps published on the stores
400+engineers trained
Not a CV catalogue. No commercial layer between your problem and the people able to solve it.
01 / DIRECT
No account manager, no profile swapped at the last minute, no chinese whispers.
02 / ELASTIC
We size the team to the problem: one person when it’s narrow, several when speed matters.
03 / EXIT
Documentation, runbooks, pairing, traced decisions: if you depend on us at the end, the work isn’t done.
An app to build, a codebase gone fragile, a team slowed down by its architecture or a native issue nobody wants to touch: the format comes after the diagnosis.
Product and technical scoping, Expo / React Native architecture, design system, backend integrations, native modules when needed, CI/CD, App Store and Google Play, monitoring and handover.
A squad that already works together = less friction, more useful decisions, earlier.
Critical apps, crashes, slowness, unstable releases, prototypes that became products too fast. Short diagnosis, profiling, instrumentation, corrective PRs and a stabilisation plan.
No reflex rewrite. We measure, we prioritise, then we fix in the right place.
Monorepo, design system, modularisation, TypeScript migration, Expo and New Architecture, CI/CD, technical governance, mentoring and handover.
Several seniors in your repo, without multiplying architecture styles or conventions.
Swift / Kotlin, BLE, camera, third-party SDKs, Android performance, lists, cold start, animations, store release, complex debugging, architecture audit or training.
One expert steps in. The other six stay available for peer review and backup.
Same app, same users, same metrics. Median over the last rescue missions; names redacted under NDA.
before94.2%
↑ 18× fewer crashed sessions
before3.2 ★
↑ +1.5 star
before4.1 s
↑ 3.4× faster to open
before60–72 fps
↑ 40–50% frame drops removed
before100
↑ −40% CPU
before24 min
↑ 4× faster
The most telling missions aren’t the ones with the most people. They’re the ones where a technical decision turns into a measurable product result.
01 / MISTRAL AI · NATIVE PLATFORM
Three months on Le Chat mobile during hypergrowth: 322 commits, 14 workstreams. Native file-preview module, inbound and outbound share intent, iOS widgets and an Android tile, design system and a new auth flow.
49PRs merged in 3 months
~60 %of the work in native
02 / SEPHORA · MULTI-COUNTRY MONOREPO
One monorepo, three internal apps for Sephora staff across Europe and the Middle East. UI, business rules, API calls and stores are shared; on launch, each country gets its typed settings from the backend. And not just translations: address and date formats, form fields, enabled features, auth settings. All of it working LTR and RTL.
60app variants, one repo
0per-country forks
03 / NACON · IOT + BLE
Companion app for a PlayStation controller: offline-first TypeScript core on Expo, hardware UI, full BLE stack. The bridge between silicon and React Native, done cleanly, on iOS and Android.
BLE ↔ RNtype-safe protocol
iOS + Androidone Expo codebase
PORTFOLIO SCALE
One React Native template and design system for Chelsea, Liverpool FC, Newcastle, Six Nations, Davis Cup and other sports products.
9apps / one chassis
MULTI-TENANT
25+ credit unions, distinct branding and feature mix, from one Nx multi-tenant codebase shared between mobile and web.
25+tenants / one codebase
SCALE-UP MIGRATION
TypeScript migration without interrupting the IoT and BLE flows, A/B testing, faster CI and mentoring for the mobile team.
−60%CI build time
0salesperson in the loop
Expo · iOS · EAS
BLE · training · handover
— LinkedIn, opens in a new window^2015Performance · native
monorepo · architecture · CTO as a service
— LinkedIn, opens in a new window^2017Motion · shaders
Reanimated · Skia · TypeGPU
— LinkedIn, opens in a new window^2019UX · animations
white label · OTA · release
— LinkedIn, opens in a new window^2017Lead RN & Expo
architecture · reliability · offline
— LinkedIn, opens in a new window^2016Tech lead · From scratch
startups · monorepo · animations
— LinkedIn, opens in a new windowBLE · connected apps
native modules · hardware · IoT
You’re not hiring seven people. You get access to seven specialities. One person can carry the mission; the others review, challenge and unblock when the subject calls for it.
01 / MOUNT
diagnosis · week 0
Five days with your code, not with a deck. Profiling, crash reports, pipelines, docs and team constraints.
02 / SHIP
delivery · weeks 1 → N
PRs in your repo, your review process, your standups. Visible results every week, not at the end.
03 / UNMOUNT
handover · end of mission
The real test: your team has to be able to continue without us. Documentation, runbooks, walkthroughs and traced decisions.
We maintain, we teach, we organise, we publish. Expertise also shows where there is no client invoice.
The normal questions to ask before letting an external team touch a production app.
A collective of seniors already used to working together. No commercial layer between you and the engineers working in your codebase.
Yes. Rescue and scale missions are designed precisely for existing codebases: diagnosis, profiling, prioritisation, fixes and a long-term trajectory.
No. A mission can be carried by a single expert, a pair or a squad of two to four profiles. The size follows the problem.
Yes. Native modules, BLE, camera, third-party SDKs, performance, hardware integrations and platform issues are part of the interventions described on this page.
With a 30-minute conversation, then if the context calls for it, a short diagnosis of the repo and the metrics. Scope and format come after.
Yes. If your context requires it, sensitive material can be shared after an NDA.
An app that crashes, a migration dragging on, a monorepo to structure, a stubborn native module or simply a product to launch fast. We’ll tell you what we would tackle first — and whether we’re the right fit.
Book the diagnosis