React Native lets one engineering team ship an iOS app and an Android app from a single TypeScript codebase, without the "hybrid feel" that used to be the price of that choice. With the New Architecture — Fabric renderer, TurboModules, JSI and Hermes — the runtime is close enough to native that finance, insurance and B2B customers stop noticing they are on a cross-platform stack. That is the bar we build to.
We use React Native as the default mobile stack for most engagements, and drop into Swift or Kotlin only where it actually matters — biometrics, secure enclave, background geolocation, HCE payments, camera pipelines, or SDKs a bank has already licensed.
What we build in React Native
Most of our React Native work sits in three buckets, and the framework earns its place in each.
Customer-facing fintech and BFSI apps — mobile banking front-ends against a core banking system, policyholder self-service for insurance carriers, digital lending journeys, wallet and remittance apps, agent apps for field officers. These are the apps where the New Architecture matters most: 60fps scroll on transaction lists, sub-second cold start with Hermes precompiled bytecode, and a UI that survives spotty networks in Nairobi, Lagos or a tier-3 Indian town.
B2B and internal apps — sales force apps sitting on top of Zoho CRM or Salesforce, field service apps for utilities and telcos, warehouse and logistics apps with barcode and RFID, dealer and distributor portals for Odoo ERP. Offline-first is usually the hard requirement here; we lean on WatermelonDB or SQLite with a sync layer we've built and rebuilt across engagements.
Consumer and marketplace apps — commerce, healthtech, edtech, on-demand services. Push notifications via FCM and APNs, deep links, in-app purchases, referral flows, analytics — the connective tissue that turns a working app into a product.
The technical stack, in practice
Every new React Native app we start ships on the New Architecture. Fabric gives us a synchronous, thread-safe view hierarchy and lets us hand off layout work to the UI thread properly. TurboModules replace the old bridge with lazy-loaded, JSI-backed native modules — cheaper startup, faster native calls, and a cleaner path when we do need to write a Swift or Kotlin module. Hermes is the JS engine; we ship with bytecode precompilation and source maps wired into Sentry for readable crash traces.
TypeScript is non-negotiable end-to-end — strict mode, discriminated unions for API responses, generated types from OpenAPI or GraphQL schemas so the mobile team and the backend team share one contract. State management is boring on purpose: Zustand or Redux Toolkit for local state, TanStack Query for server state and cache invalidation, React Hook Form with Zod for forms and validation.
Navigation is React Navigation with native-stack, so transitions feel like the platform. Styling is either NativeWind (Tailwind on RN) or a design-token system we set up per client — either way, dark mode, dynamic type and RTL are handled from day one, not retrofitted.
For app delivery we use Expo where it fits — EAS Build, EAS Update for OTA JS updates, EAS Submit for the store pipelines — and drop to a bare workflow when a native SDK forces our hand (payment gateways, HSM-backed key stores, some KYC vendors). Either way, CI runs on GitHub Actions or Bitbucket Pipelines, with Detox or Maestro for end-to-end tests on real device farms.
Where native modules actually earn their weight
React Native isn't a religion. We write native code when the framework can't give us what the app needs.
Concretely, that means Swift/Kotlin work for: biometric auth against Face ID, Touch ID and Android BiometricPrompt with keys in Secure Enclave / StrongBox; jailbreak/root and tamper detection for banking apps; SSL pinning and certificate transparency; background location and geofencing for field apps; camera pipelines for cheque capture, KYC document scan and liveness; NFC and HCE for tap-to-pay; and integrations with SDKs that only ship as XCFrameworks or AARs — Onfido, Jumio, Idfy, Signzy, Razorpay, Stripe Terminal, MPesa Daraja, Flutterwave, and the various Indian NPCI stacks.
Where a client already has a working native SDK — say, an internal auth or crypto library — we wrap it as a TurboModule so the React Native side sees a clean, typed API.
Security, compliance and app store readiness
For BFSI clients this is where projects live or die. We build to the BFSI practice baseline: OWASP MASVS L2 as the target, static and dynamic analysis in CI, secrets never in the JS bundle, all sensitive I/O through native modules. For India, that means RBI mobile banking guidelines and IRDAI advisories on customer data. For Africa, CBK guidance in Kenya, NAICOM in Nigeria, IRA in Uganda. For UK and EU deployments, PSD2 SCA and GDPR-shaped data handling. For US healthtech, HIPAA-aligned storage and transport.
App store submission is part of the delivery, not an afterthought. Data safety labels on Play, privacy nutrition labels on App Store, IDFA prompts, ATT copy, export compliance — all of it prepared before we hit "submit", so review cycles don't turn into a month of ping-pong with Apple.
Why teams work with Redian on React Native
We're a CMMI Level 3 appraised, ISO 27001 and ISO 9001 certified shop, with production React Native apps live in banking, insurance, lending, logistics and B2B SaaS across India, the UK, the US, Kenya, Nigeria, Uganda, the UAE and Saudi Arabia. Mobile isn't a side practice — it sits alongside our CRM & ERP implementation work and our BFSI product engineering, which is often exactly what a client needs: a mobile team that understands the backend it's talking to.
Engagements run either as fixed-scope product builds with milestone deliverables, or as IT staff augmentation with senior React Native engineers embedded in a client's own squad. In both models the code, the CI, the store accounts and the signing keys stay with the client.
See case studies for shipped work, or get in touch to talk through a specific app.
