Bestkaam Logo
California Software Logo

Senior Full-Stack Engineer - React Native & Node.js

Actively Reviewing the Applications

California Software

Noida Full-Time 4–8 years
Posted 2 days ago Apply by June 11, 2026

Job Description

About the job

Role: Senior Full-Stack Engineer - React Native & Node.js

Location: Remote / Chennai

Job Type: Full-Time

Experience: 5+ years mandatory

Start Date: Immediate

Screening Priority: Proven leadership and end-to-end product and mobile app development experience in startup environments.


About the role

We’re building a mobile-first hyperlocal super app that unifies commerce, services, logistics, and payments into a single operating system.

This is not a feature-shipping role.

This is a 0→1, founder-level engineering role — where you will:

  • Architect systems from first principles
  • Ship end-to-end products independently
  • Own critical decisions across product, engineering, and scale

You will work directly with the founder and operate as a full-stack owner, not a contributor.


Perks

  • Work from anywhere. Own your time. Deliver outcomes. Fully remote with flexible hours, with occasional travel as required
  • Work from Bali, Thailand, Vietnam, etc — on us. Sponsored overseas workcation after one year (flights + stay covered)
  • Not your typical offsites. Milestone-based team experiences (India + overseas) — escape rooms, private chef dinners, race track days
  • Build with the best tools. Premium hardware + access to leading AI tools (e.g., Claude Pro/Max)
  • Real ownership from day one. Shape product and technical decisions directly
  • Grow into leadership. Clear path to Head of Engineering
  • See the full picture. Direct exposure to product, GTM, and scaling decisions
  • Stability + ambition. Backed by a public limited company with startup-level ownership


What You’ll Build

You will design and ship core systems such as:

  • Merchant Onboarding
  • KYC, verification, compliance workflows
  • Hyperlocal Discovery
  • Tools that power real-world execution at scale
  • Geo-based ranking, density optimization, supply-demand matching
  • Internal Ops Systems
  • Tools that power real-world execution at scale


What You Own

  • Build production-grade systems from scratch
  • Translate ambiguous ideas → architecture → shipped product
  • Own the entire lifecycle:
  • Design → Build → Deploy → Monitor → Iterate
  • Make high-stakes technical decisions independently
  • Design systems that scale across:
  • Commerce (food, grocery, retail)
  • Services (home services, salons, etc.)
  • Logistics + financial flows


System Design & Architecture

  • Design system architecture from first principles based on product needs
  • Make pragmatic trade-offs between speed, scalability, and complexity
  • Build systems that handle real-world constraints (data inconsistency, async workflows, geo-based logic)
  • Model data effectively across SQL and NoSQL systems
  • Evolve architecture over time as the product and scale grow


Tech Expectations

Frontend (React Ecosystem)

  • Deep expertise in React + Next.js (App Router)
  • Strong grasp of:
  • SSR, SSG, ISR, edge middleware
  • Advanced patterns (compound components, hooks architecture)
  • State management judgment:
  • Zustand / Redux Toolkit / React Query — knows when to use what
  • Performance-first mindset:
  • Rendering strategies, lazy loading, bundle optimization

Backend (Node.js)

  • Strong experience with Node.js + Typescript
  • Ability to design:
  • Scalable REST APIs (versioning, rate limiting, fault tolerance)
  • Experience with:
  • Distributed systems
  • Event-driven architectures / queues (BullMQ, RabbitMQ, etc.)
  • Writes clean, maintainable, production-grade code


Data & Systems Design

  • Strong fundamentals in:
  • Schema design (SQL + NoSQL)
  • Indexing, performance, trade-offs
  • Experience with:
  • PostgreSQL / MySQL / MongoDB / Redis
  • Understands:
  • Caching strategies
  • Data consistency vs speed trade-offs


Auth & Security

  • Hands-on with:
  • JWT, OAuth2, session management, refresh tokens
  • Builds:
  • RBAC and permission systems
  • Solid understanding of:
  • CORS, CSRF, injection risks, secrets management


Nice to Have (High Leverage)

  • Exposure to Python (FastAPI / Django / Flask)
  • Familiarity with mobile (React Native / Flutter)
  • Experience with AI tooling (Copilot, Claude, etc.) as a thinking partner — not a crutch


Product Mindset (Non-Negotiable)

  • Thinks in systems, not tickets
  • Can convert vague ideas → structured execution
  • Challenges assumptions before building
  • Operates with high ownership and zero hand-holding
  • Optimizes for speed and correctness


Deployment & Production Ownership

  • Comfortable with:
  • CI/CD (GitHub Actions, etc.)
  • Cloud platforms (AWS / GCP / Vercel / DO)
  • Sets up:
  • Monitoring, logging, alerting (Sentry, Datadog, etc.)
  • Handles:
  • Production incidents, debugging, rollback strategies


Who This Is For

You’ll thrive if:

  • You’ve built 0→1 products in the real world
  • You enjoy owning entire systems, not parts
  • You move fast without waiting for instructions
  • You’re comfortable with ambiguity and responsibility


Who This Is NOT For

  • Engineers who need detailed specs for everything
  • Resume-driven “stack collectors”
  • People looking to contribute to a small module


Why This Role Matters

  • You’ll help build a super app architecture (rare, complex, high impact)
  • Work across multiple real-world systems:
  • Commerce + services + logistics + payments
  • Direct exposure to:
  • Product strategy
  • GTM
  • Real scaling challenges
Check Qualification

Quick Tip

Customize your resume and cover letter to highlight relevant skills for this position to increase your chances of getting hired.