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Full Stack Developer — MERN + React Native
Full Stack Developer — MERN + React Native
NumiSpark's logo

Full Stack Developer — MERN + React Native

Karandeep Singh's profile picture
Posted by Karandeep Singh
3 - 6 yrs
₹6L - ₹8L / yr
Remote only
Skills
skill iconJavascript
skill iconPython
skill iconReact.js
skill iconReact Native
skill iconFlutter
skill iconDocker
skill iconGitHub
skill iconGit
skill iconNodeJS (Node.js)
TypeScript
GraphQL
skill iconPostgreSQL
GSAP
Search Engine Optimization (SEO)

About

Numispark is a France-based web and mobile development agency. We design, build and maintain custom digital products for clients across France and Europe — mobile applications, booking and marketplace platforms, e-commerce systems and business management tools.

We work with a modern JavaScript stack across mobile and web, and we manage our own production infrastructure. Our engineering culture is remote-first, asynchronous, and built around clear written communication and end-to-end ownership of what we ship.


The Role

We are looking for a Full Stack Developer to build and deliver production applications across mobile and web. You will work across the complete development lifecycle — designing APIs, building cross-platform mobile applications, developing web interfaces, and deploying and maintaining systems in production.

This is a hands-on engineering position with real ownership of features and release cycles. You will see your work reach live users on a short cycle, and you will have meaningful input into technical and architectural decisions.


Key Responsibilities

  • Develop and maintain cross-platform mobile applications using React Native for Android and iOS
  • Design and build RESTful APIs with Node.js and Express
  • Model, query and optimise MongoDB databases for production workloads
  • Build responsive web interfaces using React and Next.js
  • Deploy and maintain applications on Linux servers using Docker, including CI/CD pipelines, reverse proxy configuration, SSL and database backup procedures
  • Manage Play Store and App Store submissions, versioning and release cycles
  • Maintain, extend and improve existing production applications
  • Participate in code reviews and follow Git-based development workflows
  • Communicate progress and technical decisions clearly in written English


Required Qualifications

Experience

  • 3–6 years of professional software development experience
  • Minimum 2 years of hands-on experience with React Native
  • At least one React Native application published on the Play Store or App Store, with a clear description of your contribution

Frontend and Mobile

  • React Native — navigation, native module integration, performance optimisation, platform-specific implementation
  • React.js — hooks, component architecture, state management (Redux, Zustand or Context API)
  • Next.js — SSR, SSG and App Router
  • Strong JavaScript ES6+ fundamentals, including asynchronous programming patterns
  • TypeScript in production environments
  • Firebase — push notifications, analytics and crash reporting

Backend

  • Node.js and Express — REST API design, middleware, error handling
  • MongoDB — schema design, indexing, aggregation pipelines, Mongoose
  • Authentication and authorisation — JWT, OAuth, role-based access control
  • Real-time features — WebSockets and Socket.io
  • Payment gateway integration — Stripe and Razorpay

Infrastructure and DevOps

  • Proficiency on the Linux command line
  • Docker — writing Dockerfiles, docker-compose, container troubleshooting
  • Demonstrated experience deploying and maintaining applications on self-managed servers
  • Self-hosted deployment platforms — Coolify, Dokku, CapRover or equivalent
  • CI/CD pipelines with GitHub Actions
  • Nginx reverse proxy configuration and SSL certificate management
  • Git — branching strategies, pull requests, conflict resolution

Other

  • Professional written and spoken English
  • Availability for a daily overlap window of 2:00 PM – 7:00 PM IST to align with European business hours


Preferred Skills

The following are not required, but strengthen an application:

Mobile

  • React Native New Architecture — Fabric and TurboModules
  • Native module development in Swift or Kotlin
  • Automated release pipelines with Fastlane or EAS
  • Offline-first architecture and local persistence (MMKV, WatermelonDB, SQLite)
  • End-to-end mobile testing with Detox or Maestro

Web and Frontend

  • Tailwind CSS and modern component libraries (shadcn/ui, Radix)
  • Animation and interaction work — Framer Motion, GSAP, Reanimated
  • Web performance optimisation — Core Web Vitals, Lighthouse
  • Technical SEO fundamentals for Next.js applications
  • Accessibility standards (WCAG)

Backend and Data

  • Redis for caching and session management
  • Job queues and background workers — BullMQ, RabbitMQ
  • GraphQL and Apollo
  • PostgreSQL and Prisma
  • MongoDB replica sets, Atlas administration, aggregation performance tuning
  • Automated testing — Jest, Vitest, Supertest

Infrastructure

  • Object storage integration (S3-compatible)
  • Monitoring and observability — Sentry, Grafana, Uptime Kuma
  • Infrastructure automation and shell scripting
  • Container orchestration basics — Docker Swarm or Kubernetes
  • Database backup, restore and migration procedures at scale

Other Platforms and Tooling

  • Flutter
  • Shopify theme and app development
  • Odoo customisation
  • Mapping and geospatial development — Leaflet, Mapbox, MongoDB geospatial queries
  • Transactional email and deliverability (Brevo, SendGrid, Postmark)
  • AI and LLM API integration in production products
  • Working from Figma designs
  • Agile delivery with Jira, Linear or similar
  • Clear technical documentation writing
  • Working knowledge of French


What We Offer

  • Competitive compensation of ₹6,00,000 – ₹8,00,000 CTC per annum, based on demonstrated experience
  • Fully remote position, open to candidates across India
  • Flexible working hours outside the daily overlap window
  • International project exposure, working on products for European clients
  • End-to-end ownership of features, from design through to production release
  • Modern technology stack across mobile, web and infrastructure
  • Scope to influence architecture and technical direction
  • Continuous professional growth across the full engineering stack


Selection Process

  1. Application review
  2. Introductory call — 30 minutes
  3. Technical assignment — 4 to 6 hours, compensated
  4. Live technical discussion — 90 minutes, practical and collaborative
  5. Offer


Typical timeline from application to offer: two weeks.

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Shubham Vishwakarma

Full Stack Developer - Averlon
I had an amazing experience. It was a delight getting interviewed via Cutshort. The entire end to end process was amazing. I would like to mention Reshika, she was just amazing wrt guiding me through the process. Thank you team.
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About NumiSpark

Founded :
2025
Type :
Products & Services
Size :
0-20
Stage :
Bootstrapped

About

Numispark, agence digitale, propose des solutions innovantes en développement web & mobile, marketing digital, SEO et design, adaptées à vos besoins à Caen, Bernay et Rennes Normandie.

Read more

Candid answers by the company

What is the location preference of jobs?

Remote

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Shubham Vishwakarma

Full Stack Developer - Averlon
I had an amazing experience. It was a delight getting interviewed via Cutshort. The entire end to end process was amazing. I would like to mention Reshika, she was just amazing wrt guiding me through the process. Thank you team.
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