Android Engineer for Payment Terminals
Wallee Group AG1 day ago
Vilnius, LithuaniaSenior
Responsibilities
- Develop and maintain Android applications and components for dedicated payment terminals.
- Integrate Android components with payment applications, device services, hardware interfaces, APIs, and communication protocols.
- Implement and troubleshoot reliable payment and transaction flows across application, platform, device, network, and payment protocol layers.
- Work with TLS, certificates, cryptographic operations, secure key handling, and PCI-related security requirements.
- Review code, improve architecture, write automated tests, and maintain a reliable and maintainable codebase.
- Collaborate with Product, QA, certification, and engineering teams to deliver production-ready payment solutions.
- Support complex technical investigations and advise teams on terminal behavior, APIs, and integration requirements.
Requirements
- Strong professional experience developing Android software with Kotlin and Java.
- Good understanding of Android application architecture, services, lifecycle, IPC, threading, networking, and debugging.
- Ability to design maintainable software, understand complex existing systems, and troubleshoot production issues.
- Practical experience with TCP/IP, HTTP, and TLS.
- Understanding of encryption, certificates, symmetric and asymmetric cryptography, hashing, and secure data handling.
- Ability to write readable, maintainable, documented, and well-tested code.
- Professional fluency in English and effective collaboration skills in an international engineering environment.
- Experience with TypeScript is a strong advantage.
- Experience with payment terminals, payment systems, embedded Android devices, POS systems, EMV, PCI, or payment protocols is advantageous but not required.
Benefits
- Flexible daily hours and a four-week Work from Anywhere policy each year.
- Modern office in central Vilnius with fresh fruit, snacks, and high-quality coffee.
- Personal development budgets and company events.
- Collaborative, flat engineering environment with opportunities for technical ownership.
- Based in Vilnius; compensation is stated as €2,500–€6,000 gross per month depending on experience, seniority, and technical expertise.
Tech Stack
Categories
Mobile
About Wallee Group AG
Wallee Group AG builds an omnichannel payments platform for merchants, offering an online payment gateway, in‑store card terminals, and developer APIs to accept and reconcile payments across channels. It sells payment processing and related services on a transaction-fee basis, with plugins for common e‑commerce systems and support for multiple payment methods. The privately held company is headquartered in Winterthur, Switzerland, and operates across several European markets.