Flutter Developer

Direct2pay Devraaj Payments And Tech Solutions; Dehradun; On-site; INR 900,000 - 1,600,000; Full time

Job summary

Direct2pay Devraaj Payments And Tech Solutions in Dehradun seeks a battle-tested Flutter Developer to own mobile app development end-to-end for a live fintech platform handling real money transactions. You will secure, stabilize, and optimize a production-grade app used by real merchants.

The role requires senior engineering discipline, deep Flutter expertise, and responsibility for payment failures and security in production, with a focus on performance and reliability.

Qualifications

• Flutter/Dart production apps, 2–3 yrs minimum, shipped to Play Store/App Store.
• State management with BLoC; clean architecture layering.
• Hive encrypted local storage with migrations.
• Security fundamentals: SSL pinning, root/jailbreak detection, obfuscation.
• End-to-end encryption concepts (AES/RSA).
• Experience with fintech apps or payment/wallet services is a plus.

Responsibilities

• Design, build, and maintain a production-grade fintech Flutter app.
• Enforce security best practices and secure API communication.
• Implement end-to-end encryption and key management with backend teams.
• Develop deep links (Android App Links, iOS Universal Links).
• Handle push notifications and data payloads.
• Render UI dynamically from API/JSON config; avoid hardcoded layouts.
• Own state management using BLoC and Clean Architecture.
• Persist data locally with Hive including encrypted boxes.
• Write modular, testable code with strong OOP principles.
• Collaborate with backend, QA, and security teams to fix vulnerabilities.
• Manage release cycles: versioning, Play/ App Store submissions, hotfixes.

Skills

Flutter/Dart

BLoC

Clean Architecture

Hive

Security

AES/RSA

iOS deployment

REST APIs

Git

Dynamic UI

OOP

Encryption

Push notifications

App links

Job description

Flutter Developer

Fintech Platform | Job Description

Experience

2 3 Years

Location

Dehradun

Employment Type

Full-Time

About the Role

We are looking for a battle-tested Flutter Developer who can own mobile app development end-to-end for a live, production-grade fintech platform handling real money transactions (BBPS, payouts, payments). This is not a "build a UI and call an API" role — you will be responsible for the security, stability, and performance of an app that touches sensitive financial data every single day. We need someone who thinks like a senior engineer, codes with discipline, and doesn't panic when a payment fails in production at 11 PM.

If you're comfortable with "it works on my machine," this is not the role for you.

Key Responsibilities

• Design, build, and maintain a production-grade fintech Flutter application (BBPS / bill payments / recharge / payouts) used by real merchants and real money.
• Implement and enforce application security best practices — secure storage, obfuscation, root/jailbreak detection, anti-tampering, SSL pinning, and secure API communication.
• Implement end-to-end encryption for sensitive payloads (AES/RSA, key management, hashing) in coordination with backend and payment gateway teams.
• Build and maintain deep linking (App Links / Universal Links) for referral, payment callback, and notification-driven navigation flows.
• Implement and manage push notifications (FCM) — including silent notifications, data payload handling, and notification-triggered app actions.
• Build dynamic, config-driven UI rendering — screens/forms that render based on JSON/API response (similar to BBPS operator/biller dynamic forms), not hardcoded layouts.
• Own state management using BLoC, written with strict adherence to Clean Architecture (data / domain / presentation layers, use-cases, repository pattern).
• Implement local persistence using Hive — including encrypted boxes for sensitive data, migrations, and adapters.
• Write modular, reusable, testable code rooted in strong OOP principles (SOLID, abstraction, dependency injection).
• Handle iOS-specific development — provisioning, entitlements, App Store compliance, platform channels, and iOS-specific bugs (not just "Android developer who also builds for iOS").
• Debug and resolve production-level payment failures, encryption mismatches, and gateway integration issues independently.
• Collaborate directly with backend, QA, and security teams to close vulnerabilities before release — not after an audit flags them.
• Own release cycles: versioning, Play Store/App Store submissions, crash monitoring, and post-release hotfixes.
• Apply strong OOP concepts (encapsulation, inheritance, polymorphism, abstraction) in daily coding, and be ready to defend these choices in live-coding rounds.
• Own dynamic screen rendering — build screens/flows that render and adapt purely from JSON/API-driven configuration rather than hardcoded widget trees.

Mandatory Skills

• Flutter/Dart: Strong hands-on, 2–3 yrs minimum, production apps shipped to Play Store/App Store
• State Management: BLoC (mandatory) — Cubit, Event/State separation, BLoC-to-BLoC communication
• Architecture: Clean Architecture — non-negotiable, must explain layering in interview
• Local Storage: Hive — encrypted boxes, adapters, type registration, migrations
• Security: App security fundamentals — SSL pinning, root/jailbreak detection, code obfuscation
• Encryption: AES/RSA implementation experience, key exchange concepts, hashing (MD5/SHA)
• Fintech Domain: Prior experience on a BBPS / payment / wallet / recharge application is a strong plus
• Notifications: FCM — foreground, background, and terminated state handling
• Deep Linking: Android App Links + iOS Universal Links, deferred deep linking is a bonus
• Dynamic UI: Experience rendering forms/screens dynamically from API/JSON config
• OOP: Strong grasp of OOP concepts — this will be tested with live coding, not just theory
• iOS: Must have shipped and debugged on iOS independently, not "Android-only with iOS as an afterthought"\
• Version Control: Git — branching strategy, PR discipline, conflict resolution
• API Integration: REST APIs, error handling, retry logic, request/response encryption

Good to Have

• Experience with payment gateway SDKs
• Experience with biometric authentication (fingerprint/Face ID)
• Understanding of PCI-DSS or similar compliance basics