Full Stack Flutter & Kotlin Developer

SpaceWire Tech; Bengaluru; On-site; INR 1,200,000 - 2,100,000; Full time

Job summary

SpaceWire Tech, a consumer technology product company, is seeking a Full Stack Flutter & Kotlin Developer to own mobile products from frontend to backend, APIs, payments, third-party SDKs, deployment, and production support. The role requires building complete applications from scratch using Flutter/Dart and Kotlin, with hands-on experience across Android/iOS and backend services, including REST APIs and databases.

On-site in Bengaluru, 1–5 years of experience.

Qualifications

• 2–5 years of professional software development experience.
• Strong expertise in Flutter and Dart.
• Good hands-on experience with Kotlin and Android development.
• Strong understanding of Flutter architecture, state management, navigation, animations, and responsive UI.
• Strong knowledge of Android SDK, Kotlin, Gradle, and native Android integrations.
• Experience with REST APIs, JSON, API authentication, and backend integration.
• Strong backend development experience using technologies such as Node.js, PHP, Python, or similar.
• Strong knowledge of SQL databases such as PostgreSQL/MySQL.
• Experience with payment gateway integration and subscription/payment systems.
• Experience integrating and managing third‑party SDKs and APIs.
• Experience with Firebase, including FCM, Analytics, Crashlytics, etc.
• Good understanding of Git/GitHub and modern development workflows.
• Experience with Android/iOS builds, signing, debugging, and publishing.
• Understanding of cloud infrastructure and deployment.

Responsibilities

• Build complete consumer applications from scratch using Flutter/Dart and Kotlin.
• Develop high-quality, scalable Android and iOS applications using Flutter, with Kotlin for native Android development and integrations.
• Develop and maintain backend services, REST APIs, databases, and server-side architecture.
• Integrate and manage payment gateways (PG), subscriptions, payment APIs, and transaction flows
• Integrate, configure, troubleshoot, and maintain third‑party SDKs and APIs
• Develop native Android modules and integrations using Kotlin when required
• Implement authentication, OTP, push notifications, analytics, crash reporting, deep links, and other essential mobile services.
• Design efficient database structures and API architecture.
• Handle Android/iOS builds, release management, deployment, and production debugging.
• Optimize applications for performance, scalability, reliability, and security.
• Work with cloud services and backend infrastructure.
• Debug production issues across the frontend, backend, APIs, database, native code, and third‑party integrations
• Work closely with the product team to convert ideas into functional consumer products.

Skills

Flutter & Dart

Kotlin & Android

REST APIs

Firebase

Payment gateway integration

SQL databases

Cloud deployment

Git/GitHub workflows

Android/iOS builds

Backend integration

Tools

Supabase

AWS / Google Cloud

Stripe / Razorpay / Cashfree

Play Console / App Store Connect

Job description

We are looking for someone who is not limited to Flutter UI development.

Role: Full Stack Flutter & Kotlin Developer

Experience: 1–5 Years

Employment: Full-time

Work Mode: On-site

Salary: Competitive, based on experience

HINDI LANGUAGE FLUENCY IS MANDATORY

About the Role

We are a consumer technology product company building products such as Bhaktilok (Devotional) and CashAlert. We are looking for a Full Stack Flutter & Kotlin Developer who can take complete ownership of building mobile products from scratch — from frontend and backend to APIs, payment gateway integration, third-party SDKs, deployment, and production support.

This is a hands‑on engineering role for someone who can independently turn a product idea into a production‑ready consumer application.

Key Responsibilities

• Build complete consumer applications from scratch using Flutter/Dart and Kotlin.
• Develop high-quality, scalable Android and iOS applications using Flutter, with Kotlin for native Android development and integrations.
• Develop and maintain backend services, REST APIs, databases, and server‑side architecture.
• Integrate and manage payment gateways (PG), subscriptions, payment APIs, and transaction flows.
• Integrate, configure, troubleshoot, and maintain third‑party SDKs and APIs.
• Develop native Android modules and integrations using Kotlin when required.
• Implement authentication, OTP, push notifications, analytics, crash reporting, deep links, and other essential mobile services.
• Design efficient database structures and API architecture.
• Handle Android/iOS builds, release management, deployment, and production debugging.
• Optimize applications for performance, scalability, reliability, and security.
• Work with cloud services and backend infrastructure.
• Debug production issues across the frontend, backend, APIs, database, native code, and third‑party integrations.
• Work closely with the product team to convert ideas into functional consumer products.

Required Technical Skills

• 2–5 years of professional software development experience.
• Strong expertise in Flutter and Dart.
• Good hands‑on experience with Kotlin and Android development.
• Strong understanding of Flutter architecture, state management, navigation, animations, and responsive UI.
• Strong knowledge of Android SDK, Kotlin, Gradle, and native Android integrations.
• Experience with REST APIs, JSON, API authentication, and backend integration.
• Strong backend development experience using technologies such as Node.js, PHP, Python, or similar.
• Strong knowledge of SQL databases such as PostgreSQL/MySQL.
• Experience with payment gateway integration and subscription/payment systems.
• Experience integrating and managing third‑party SDKs and APIs.
• Experience with Firebase, including FCM, Analytics, Crashlytics, etc.
• Good understanding of Git/GitHub and modern development workflows.
• Experience with Android/iOS builds, signing, debugging, and publishing.
• Understanding of cloud infrastructure and deployment.

Good to Have

• Experience with Supabase.
• Experience with AWS, Google Cloud, or Cloudflare.
• Experience with payment gateways such as Cashfree, Razorpay, Stripe, or similar.
• Experience building subscription‑based consumer applications.
• Experience with Google Play Billing and Apple In‑App Purchases.
• Experience with Redis, queues, background jobs, or serverless architecture.
• Knowledge of Swift/iOS native development is a plus.
• Experience launching and maintaining consumer applications at scale.

Who We’re Looking For

We are looking for someone who is not limited to Flutter UI development.

You should be comfortable taking a product idea and figuring out how to build and launch it end‑to‑end.

You should be able to work across:

Strong problem‑solving ability, ownership, attention to detail, and the ability to work independently are extremely important.

Candidates with proven experience building and launching complete products from scratch will be strongly preferred.