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Cofinex Exchange
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Flutter Developer – Crypto Exchange Mobile App (Kolkata Only)

Flutter Developer – Crypto Exchange Mobile App (Kolkata Only)

Cofinex Exchange

5 years

0 Lacs

Kolkata West Bengal India

Posted:2 months ago| Platform:

Apply

Skills Required

flutter developer mobile scaling stack trading development android ui ux rest notifications management api integration storage hive sqlite blockchain tuning debugging publishing portfolio github

Work Mode

Remote

Job Type

Full Time

Job Description

Location

Type

Company

Experience

Industry

About Cofinex

Cofinex is a licensed and fast-scaling global crypto exchange building a full-stack ecosystem — from trading (Spot, Futures, Margin) to real-world utility (Crypto Cards, Web3 Wallets, and more). We're on a mission to make crypto accessible, secure, and usable for everyone.

Job Summary

Flutter Developer

Responsibilities

Build high-performance, real-time mobile apps using
Flutter (Dart)
Convert UI/UX designs into pixel-perfect mobile screens
Integrate REST APIs and WebSocket for real-time trading and wallet features
Implement biometric login, push notifications, deep linking
Ensure app responsiveness, performance, and security
Publish and maintain apps on Google Play and Apple App Store

Requirements

2–5 years of experience building mobile apps using
Flutter
Experience with
State Management (Provider, Riverpod, or Bloc)
Good knowledge of
API integration, local storage (Hive/SQLite), and Firebase
Familiarity with
crypto wallets, blockchain APIs, or trading UI
is a huge plus
Strong knowledge of performance tuning, debugging, and crash handling
Bonus: Experience integrating with
wallets (MetaMask, WalletConnect)
or
QR scanners for Web3
Bonus: Familiarity with publishing apps and App Store guidelines

Perks & Benefits

Early team member at a high-growth Web3 startup
Work on real blockchain integrations and global-scale products
Flexible remote work and tech-first culture
Token/equity options for long-term contributors
Opportunity to grow into Lead Mobile Developer as we scale

How to Apply

hiring@cofinex.io

Subject Line:
Flutter Developer – [Your Name]

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