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Velotio Technologies
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Senior Android Developer

Senior Android Developer

Velotio Technologies

5 - 10 years

7 - 12 Lacs

Pune

Posted:2 days ago| Platform:

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Skills Required

Maven XML Debugging Billing Machine learning Android SDK Open source Release management Analytics Android

Work Mode

Work from Office

Job Type

Full Time

Job Description

We are seeking a Senior Android Developer with expertise in building Android software development kits (SDKs) to join our team. In this role, you will lead the end-to-end development of Android SDKs that will be integrated by other developers into their applications.

The ideal candidate is an expert in Kotlin and Java, has a strong grasp of Android architecture and design patterns, and has a proven track record of publishing and maintaining Android libraries. You will drive the SDKs design, implementation, documentation, and long-term maintenance, ensuring high performance, reliability, and backward compatibility. This is a senior-level technical role that requires hands-on development, strategic thinking, and the ability to collaborate effectively in a hybrid work environment.

Design & Build: Craft modular, high-performance Android SDKs in Kotlin (and supportive Java) that are easy to integrate and extend.
SDK Lifecycle Ownership: Own the full SDK development lifecycle including planning, development, testing, and release. Manage versioning (semantic versioning) and long-term maintenance for continuous improvement of the SDK.
Release Management: Publish artifacts to Maven Central / JitPack, manage semantic versioning, changelogs, and ensure backward compatibility.
Performance & Reliability: Profile, benchmark, and optimize for low memory, battery, and network usage across a wide device matrix.
Security & Compliance: Implement encryption, token handling, and privacy-first data practices - crucial for payment and analytics use cases.
Documentation & Samples: Produce clear guides, Javadoc/KDoc, and sample apps so external teams can get started in minutes.
Collaboration: Partner with product, backend, and QA to define features, automate CI/CD (GitHub Actions/Bitrise), and drive code reviews.

What you will bring:

5+ years of Android development with deep Kotlin expertise and solid Java fundamentals.
Demonstrated success shipping at least one widely adopted Android SDK or open-source library.
Hands-on with Gradle plugin configuration, dependency management, ProGuard/R8, and publishing pipelines.
Strong debugging skills using Android Studio Profiler, Logcat, and crash-reporting tools (e.g., Firebase Crashlytics, Sentry).
Excellent written communication; able to translate complex concepts into concise developer documentation.

Core Android Development

Kotlin 1.9 / 2.x & Java 11+: expert-level proficiency
Android API 23 - 34: deep platform knowledge, multi-APK/AAB experience
Jetpack Compose 1.6+ & ViewSystem XML
Gradle 8.x (KTS), modular multi-module projects, dependency management

Security & Cryptography

AES-256, RSA-2048, SHA-256, Keystore hardware-backed keys
PCI DSS, OWASP M-STG best practices, secure memory handling
SafetyNet / Play Integrity, certificate pinning, TLS 1.3

Network & API Development

Retrofit 2, OkHttp 5, Kotlinx Serialization / Moshi
Coroutines & Flow, exponential backoff, connectivity awareness

Architecture & Patterns

MVVM, Clean Architecture, Repository, DI (Hilt/Dagger), Builder/Factory
Modular Gradle projects, feature flags, dynamic feature delivery

Testing & CI/CD

Unit (JUnit 5), Instrumentation (Espresso), Robolectric, MockK
Code-coverage enforcement, static analysis (Detekt, Lint)
Automated pipelines with GitHub Actions, Bitrise, or Jenkins

Payment Domain Knowledge

PAN/PCI tokenization, CVV-less flows, 3-D Secure 2.x
EMVCo specs, gateway APIs, recurring billing, chargeback flows

Bonus Points if you have........

Prior experience in payment processing (tokenization, 3-D Secure) or analytics/event-tracking SDKs.
Knowledge of CI/CD for mobile (Fastlane, Bitrise, or GitHub Actions) and automated testing of libraries.
Contributions to open-source Android projects or active presence in the dev community.

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Velotio Technologies

Software Development

Pune Maharashtra

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Senior Android Developer