#vacancy #android #kotlin #fintech #mobile #remote

Vacancy: Android Engineer (Fintech & Crypto Payments) Level: Middle / Senior Company: Lagrange Labs Salary Range: 6,500 – 9,300 USD Conditions: Full-time, Remote

Responsibilities: — Development and support of a mobile application for asset management and ZK-payments. — Implementation of secure key storage and on-device transaction signing mechanisms (Biometrics, Android Keystore). — Integration with blockchain nodes and external APIs via JSON-RPC and REST/gRPC. — Optimization of mobile ZK-libraries for client-side proof generation. — Designing complex UI components and custom animations for visualizing crypto operations. — Writing unit and UI tests to ensure the stability of critical financial functions. — Participation in the design of the mobile application architecture with a focus on modularity and security.

Requirements: — 4+ years of commercial Android development experience. — Expert knowledge of Kotlin, understanding of Coroutines and Flow. — Experience with modern stack: Jetpack Compose, Dagger/Hilt, Retrofit. — Understanding of mobile security principles and working with cryptographic primitives. — Knowledge of design patterns (MVVM/MVI) and Clean Architecture. — Experience with Web3 libraries (web3j or similar) and understanding of blockchain transaction specifics. — English language: Upper-Intermediate (for daily interaction with the team).

Will be a plus: — Experience in FinTech projects or mobile crypto wallets. — Understanding of smart contract principles. — Experience with C++ libraries (via JNI) for cryptographic tasks.

Contact: Gorskines