Android Developer for In-App Purchase Flow

Silverline Labs

Contract · Remote · Flexible hours

About the role

Silverline Labs is building a unified billing‑CRM bridge to streamline internal workflows. As an Android Developer you will craft the mobile layer that talks to our new BillingSync module, ensuring seamless data flow between the billing system, CRM, and internal APIs.

Key responsibilities

• Design and implement the BillingSync Android SDK using Kotlin and Java.
• Integrate RESTful endpoints for billing, CRM, and internal services with Retrofit and OkHttp.
• Set up secure token handling and OAuth2 flows for API authentication.
• Write unit and UI tests with JUnit and Espresso to achieve 80% coverage before the 8‑week milestone.
• Collaborate with backend engineers to define API contracts and troubleshoot integration bugs.
• Document SDK usage and create sample app showcasing end‑to‑end integration.

Must-have skills

• Strong Android development experience with Kotlin and Java.
• Proficiency in REST API consumption and JSON parsing.
• Hands‑on with Android Jetpack components, Coroutines, and MVVM architecture.
• Experience using Retrofit, OkHttp, and handling authentication flows.
• Ability to write automated tests using JUnit and Espresso.

Nice to have

• Familiarity with CI/CD pipelines for Android (GitHub Actions, Bitrise).
• Knowledge of billing APIs or CRM integration patterns.