Senior React Native Developer — Core Team @ Zumlo

Zumlobharatpur, India

4 days ago

Job description

About Zumlo

Zumlo is an always-on well-being companion—one place for immediate help, gentle structure, and progress you can see. We unify mind, body, emotions, and relationships through timely support, a caring community, and personalized guidance that fits real life.

What we stand for : Human first

Simple >

complex

Privacy & trust

Evidence over hype

Inclusive by default.

The role

You’ll own our React Native app. First : understand the existing codebase quickly and stabilize what matters. Then : lead architecture, performance, and product polish while working closely with back-end (REST APIs), design, and our Python / AI services to ship thoughtful, reliable features.

What you will do

Take over & stabilize

Map the codebase (state, navigation, data flows), surface risks, pay down critical debt.

Establish clean release hygiene : versioning, changelogs, OTA strategy (CodePush / EAS), crash / error budgets.

Build forward (React Native core)

Lead architecture, navigation, and state management (Redux / RTK, Recoil, or Zustand—choose and justify).

Build pixel-perfect, accessible UI; smooth micro-interactions (Reanimated / Skia / Lottie when it adds real value).

Implement offline-first patterns (TanStack Query / React Query, background sync, retry queues).

Own deep links, push notifications, secure storage (Keychain / Keystore), permissions UX, theming / dark mode, and i18n readiness.

Work seamlessly with the back-end

Integrate REST APIs (and GraphQL if needed) with typed clients, timeouts / retries, idempotent actions, and crisp error boundaries.

Collaborate on contracts and versioning with back-end; keep DTOs / types generated and in sync.

Integrate AI sanely

Consume LLM-powered endpoints from our Python services (streaming UIs, tool results).

Handle partial / streaming states, guardrails, redaction in telemetry, and graceful fallbacks.

Quality, performance, release

Testing : Jest + React Testing Library for units; Detox for critical E2E flows; snapshot tests for visual regressions.

Performance : Hermes / Flipper profiling, bundle size budgets, frame-rate targets, network / memory discipline.

Ops : Store submissions (App Store / Play), OTA, crash reporting / analytics (Sentry / Firebase), feature flags / experiments.

Stewardship & collaboration

Keep small diffs, crisp PRs, and docs (setup scripts, architecture notes, “how to ship” playbooks).

Partner with Product, Design, Back-end, and AI; mentor juniors; help interview the next mobile hire.

Must-have experience

5–8+ years in mobile / front-end; 3+ years in React Native + TypeScript on production apps.

Shipped and operated at least one RN app on both stores (release cadence, hotfixes, telemetry).

Deep experience with state, navigation, testing (Jest / Detox), and performance (Hermes / Flipper).

Strong REST API integration : typed clients, offline strategies, resilient error handling, analytics hooks.

Comfortable with CI / CD, store processes, OTA updates, crash / analytics tooling.

Strong plus

Experience shipping AI-adjacent flows (streaming / chat UIs, tool results, rate-limit states).

Accessibility expertise (meaningful labels, focus management, dynamic type).

Design systems / theming; localization; growth surfaces (onboarding, paywalls, referrals).

Worked across US + India time zones; comfortable with fast, respectful feedback loops .

How you work (what we actually value)

Owner’s mindset : quality, performance, clarity—end to end.

Craft + pragmatism : polish where it matters; ship small and often.

Calm reliability : predictable releases, helpful alerts, boring incidents.

Clear communication : tight specs, crisp PRs, thoughtful comments.

Kind and direct : low ego, high bar, shared standards.

Work setup

Remote-first in India, collaborating closely with a small core team.

Preference for Ahmedabad for an eventual in-person cadence; open across India for the right fit.

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React Native Developer • bharatpur, India

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