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VelotioVE

Senior Android SDK Developer

Our mission is to build delightful software products & digital experiences for innovative startups and enterprises.

Velotio

Employee count: 201-500

India only

Velotio Technologies is a product engineering company working with innovative startups and enterprises. We have provided full-stack product development for 110+ startups across the globe, building products in the cloud-native, data engineering, B2B SaaS, IoT Machine Learning space. Our team of 400+ elite software engineers solves hard technical problems while transforming customer ideas into successful products.

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 SDK's 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.

Requirements

  • 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.

Benefits

Our Culture:

  • We have an autonomous and empowered work culture encouraging individuals to take ownership and grow quickly.
  • Flat hierarchy with fast decision making and a startup-oriented “get things done” culture.
  • A strong, fun positive environment with regular celebrations of our success. We pride ourselves in creating an inclusive, diverse authentic environment.

We want to hire smart, curious and ambitious folks so please reach out even if you do not have all of the requisite experience. We are looking for engineers with the potential to grow!

At Velotio, we embrace diversity. Inclusion is a priority for us, and we are eager to foster an environment where everyone feels valued. We welcome applications regardless of ethnicity or cultural background, age, gender, nationality, religion, disability or sexual orientation.

About the job

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Posted on

Job type

Full Time

Experience level

Senior

Location requirements

Hiring timezones

India +/- 0 hours

About Velotio

Learn more about Velotio and their company culture.

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Velotio Technologies is a leading product engineering and digital solutions company working with innovative startups and enterprises across the globe. We specialize in Full-Stack development, Web & Mobile App Development, Cloud & DevOps, Data Engineering, AI/ML, UI/UX, and Quality Assurance.

Founded in Pune, India in 2016, we specialize in helping technology companies build massive engineering teams that become an extension of your in-house team. We have worked with 90+ happy customers spread across varied industries including enterprise SaaS, Real Estate, FinTech, Infrastructure & Security, and many others.

Our founding team members are serial entrepreneurs who previously founded Clogeny Technologies that later got acquired by one of the most respected cloud computing companies in India. It is their combined experience of 40+ years in the IT services industry and their leadership experience of handling teams of 300+ members, which has given us an edge over our competitors. We have processes set of a mature company, and the agility of a start-up that allows us to be more adaptable and transparent to our customers.

Our engineers know how to code, but more importantly -- they are experts at integrations across platforms, are comfortable doing things end-to-end and think about the product all the way down to the infrastructure.

Employee benefits

Learn about the employee benefits and perks provided at Velotio.

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Interest-free loans

Quick and seamless access to interest-free loans.

Health and accident insurance

Healthcare plans for you and your family (including parents).

Laptop/equipment of your choice

Choose MacBook or any other high-quality gear that works for you.

Flexible working hours

Work from where you feel most productive- home, office, or remotely.

View Velotio's employee benefits
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Velotio

Company size

201-500 employees

Founded in

2016

Chief executive officer

Kalpak Shah

Employees live in

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Velotio hiring Senior Android SDK Developer • Remote (Work from Home) | Himalayas