lexzcq
Senior Android Engineer
Senior Android engineer and former Team/Tech Lead with 9+ years building payment acceptance systems, mobile SDKs, and secure backend services for fintech. Deep expertise in SoftPOS / Tap-to-Pay, EMV (APDU), ISO8583, issuer wallet SDKs, and PCI-related security evaluations. Proven track record delivering architecture refactors, CI/CD automation (Azure DevOps), and leading cross-functional teams to production-grade releases. Open to remote roles (EMEA preferred).
Experience: 9 years
Yearly salary: $100,000
Hourly rate: $70
Nationality: 🇺🇦 Ukraine
Residency: 🇺🇦 Ukraine
Experience
Team Lead
Transplat (Transenix) 2021 - 2025
Directed a cross-functional SoftPOS product team (≈10 engineers) to design mobile/backend architecture, deliver WhiteBox cryptography, and complete PCI-aligned security evaluations while driving enterprise client integrations.
Tech Lead
CARTSYS LLC 2020 - 2021
Headed development of an issuer wallet SDK for banks, managing a small engineering team, conducting security audits, and ensuring Visa/Mastercard compliance to enable contactless issuer deployments.
Android Developer
Team Extension AG 2019 - 2020
Implemented vehicle-telemetry and remote-control features for a KIA owners app, contributing architecture decisions and automation that improved QA delivery speed and app stability.
Android Developer
Viagio / Aoza / WayApp / Other 2015 - 2019
Built and maintained multiple greenfield Android apps (Freetour, Aeron, Channels, Jet Commerce, Pharmadroid), owning end-to-end mobile architecture, offline sync, telemetry, and system-level integrations across small project teams.
Lawyer
Private Practice 2006 - 2015
Operated an independent legal practice, providing commercial law services and client counsel while developing analytical and compliance skills applicable to regulated fintech environments.
Skills
ai
android
cryptography
fintech
java
english
russian
ukrainian