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Wallee Group
Wallee Group
51 – 200 Employees
ConsultingHospitalityLogistics
Wallee Group develops cloud-based payment solutions for businesses across hospitality, logistics, consulting, retail, and eCommerce. Its platform brings together card, mobile, online, and unattended terminal payments through a centralized portal, helping organizations manage different payment channels within one integrated service. The company has a team of 51–200 employees.
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Android Engineer

Build secure Kotlin and Java software for Wallee Group’s dedicated payment terminals, integrating hardware, networking, cryptography, and production payment flows.

LTLithuania
€2,500 – €6,000 / month
HybridFull-timeMiddleSeniorEnglish RequiredAndroid EngineerSoftware Engineer
AndroidJavaKotlinTCP/IPTypeScript

Description

  • Build and maintain Android applications and components for dedicated payment terminals
  • Connect Android software with payment applications, device services, hardware interfaces, APIs, and communication protocols
  • Implement dependable payment features and diagnose transaction-flow issues
  • Apply TLS, certificate management, cryptographic operations, secure key handling, and PCI requirements
  • Troubleshoot problems across application, Android platform, device, network, and payment-protocol layers
  • Review code, strengthen architecture, create automated tests, and maintain a dependable codebase
  • Work with Product, QA, certification teams, and fellow engineers on production-ready solutions
  • Lead complex technical investigations and clarify terminal behavior, APIs, and integration requirements

Requirements

  • Professional experience building Android software with Kotlin and Java
  • Strong knowledge of Android architecture, services, lifecycle management, IPC, threading, networking, and debugging
  • Ability to design maintainable software, understand complex existing systems, and resolve production issues
  • Hands-on experience with TCP/IP, HTTP, and TLS
  • Understanding of encryption, certificates, symmetric and asymmetric cryptography, hashing, and secure data handling
  • Ability to produce readable, maintainable, documented, and well-tested code
  • Professional fluency in English
  • Effective collaboration skills for an international engineering environment
  • TypeScript experience is a significant advantage
  • Experience with payment terminals, payment systems, embedded Android devices, POS systems, EMV, PCI, or payment protocols is helpful but not required

Benefits

  • Flexible working hours each day
  • Four weeks of work-from-anywhere availability each year
  • Budget for personal development
  • Company events
  • Fresh fruit, snacks, and premium coffee
  • Modern, comfortable, bright office in central Vilnius

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