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Fiserv

Senior Engineer – Device Engineering

Fiserv

Sr. Engineer focused on lower-stack engineering for Clover’s Android payment terminals.

Posted 4/28/2026full-timeAlpharetta • California • 🇺🇸 United StatesSenior💰 $90,000 - $158,400 per yearWebsite

Tech Stack

Tools & technologies
AndroidJavaKotlinRTOS

About the role

Key responsibilities & impact
  • Design and implement solutions that span across Android applications, Inter-CPU communication, RTOS, and L2 payment kernels
  • Add new features to existing products (such as dynamic currency conversion, offline payment support, Android Pay, Apple Pay, mobile wallets, etc.)
  • Troubleshoot issues that may span across a wide range of device types, focusing on low-level system integration
  • Take ownership of specific payment components and low-level firmware modules
  • Work with international certification teams and test organizations to ensure payment kernel compliance
  • Collaborate with product management to clarify and/or create specifications
  • Triage bugs related to payment applications and related infrastructure; troubleshoot complex system integration issues to ensure resolution
  • Perform production support services as part of a regular on-call rotation

Requirements

What you’ll need
  • 5+ years of software development experience with a focus on architecture and design of Android devices and platforms
  • Advanced proficiency in C programming and at least one other major language used in AOSP (Java, C++, or Kotlin)
  • Strong experience working at the lower end of the stack, including MCU/ARM Cortex development and RTOS
  • Previous experience or a strong foundational understanding of L2 payment kernels (highly preferred)
  • Android app development experience using Kotlin and native code
  • Experience in UI development, optimal performance tuning, and adaptation to various screen sizes
  • General understanding of security protocols (encryption/decryption, PKI, HSM) and proficiency with Git/Gerrit

Benefits

Comp & perks
  • Annual incentive opportunity (mix of cash bonus and equity awards)

ATS Keywords

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Hard Skills & Tools
C programmingJavaC++KotlinAndroid app developmentUI developmentperformance tuningMCU developmentARM Cortex developmentRTOS
Soft Skills
troubleshootingproblem-solvingcollaborationownershipcommunication