Senior Mobile Engineer, Charging

Nayax; City of Schenectady (NY); On-site; USD 95,000 - 145,000; Full time

Job summary

Nayax, a global fintech leader, is hiring a Senior Mobile Engineer, Charging, to join our on-site hardware team in Schenectady, NY. You will build native Android modules in Kotlin to extend React Native apps and enable communication with charging hardware via a 40-pin connector.

You will design typed JS/TS interfaces, define app-to-hardware protocols with embedded teams, and maintain modules through React Native and Android SDK upgrades.

Qualifications

• Bachelor's degree in computer science, engineering, mathematics or related field.
• 6+ years of professional software development; 4+ years Android development in Kotlin.
• Experience writing native modules for React Native or similar frameworks (e.g., Flutter platform channels or Capacitor plugins).
• Strong knowledge of JavaScript/TypeScript and React Native's native layer (JSI, Codegen, bridge).
• Experience integrating Android with hardware over serial/UART, GPIO or USB.
• Understanding of Android threading, coroutines, permissions.
• Familiarity with Scrum/Kanban and the full SDLC.
• Clear communication with engineering and non-engineering stakeholders; good task management.
• Willingness to work onsite at Schenectady, NY.

Responsibilities

• Build and maintain native Android modules in Kotlin for React Native apps, exposing charger hardware to JavaScript/TypeScript.
• Implement local communication over the 40-pin connector between Android devices and charger hardware.
• Work with Android APIs for hardware interfaces (serial/UART, GPIO) and ensure reliable field communication.
• Design typed JS/TS interfaces for native modules with clear events and error handling.
• Define app-to-hardware protocols with embedded and hardware teams.
• Package, version, and document native modules; keep them current with React Native/Android SDK upgrades.
• Build test harnesses, simulators and tests for native-to-hardware flows.

Skills

Kotlin Android

React Native

Native modules

Android threading/coroutines

Technical communication

On-site collaboration

Mentoring

App-to-hardware design

Education

Bachelor's degree in CS/Engineering

Tools

Turbo Modules

Fabric

Codegen

Android SDK

Job description

Join Nayax, a global fintech leader (NASDAQ; TASE: NYAX) in cashless payments, consumer engagement and business management solutions, with more than 1,200 employees across 12 offices worldwide. Nayax Energy (formerly Lynkwell, acquired by Nayax in 2025) is building an integrated energy ecosystem for fleet electrification and public EV charging networks. It is the entry point to mobility and energy management for businesses, fleets, partners, utilities and drivers.

We're hiring a full-time Senior Mobile Engineer, Charging to join our global hardware team on-site in Schenectady, NY. You'll build the native Android extensions that let our React Native apps talk to our next-generation EV charging hardware. The role is focused on the native layer, not on building full native apps. You'll write the Kotlin modules that give React Native apps access to the charger hardware, which they talk to locally over a 40-pin connector.

This role requires working onsite from our Schenectady, NY office five days per week.

Your key responsibilities will include:

• Build and maintain native Android modules in Kotlin that extend our React Native apps, exposing charger hardware to JavaScript/TypeScript through Turbo Modules, Fabric components or legacy native modules.
• Implement local charger communication over the 40-pin connector between the Android device and the charger hardware, including connection handling, message parsing and error recovery.
• Work with the Android hardware and platform APIs that reach the connector (for example serial/UART and GPIO), plus foreground services and permissions, so communication stays reliable in the field.
• Design clear, typed JS/TS interfaces for native modules (for example Codegen specs), with predictable events, error handling and lifecycle behavior.
• Define the app-to-hardware protocols and data contracts with the embedded and hardware engineering team.
• Package, version and document native modules, and keep them current through React Native and Android SDK upgrades.
• Build test harnesses, simulators and automated tests (unit, instrumentation and on-device) for native-to-hardware flows, supporting hardware and firmware validation.
• Mentor less experienced engineers, and explain problems and solutions at every level, from deep technical dives to architecture and design discussions.
• Work across teams inside and outside engineering, including customer support, product management, marketing and sales.

Requirements

• A bachelor's degree in computer science, engineering, mathematics or a related field, or equivalent experience.
• 6+ years of professional software development, including 4+ years of Android development in Kotlin (Java a plus).
• Experience writing native modules or extensions for React Native (Turbo Modules, Fabric or legacy native modules), or for similar frameworks such as Flutter platform channels or Capacitor plugins.
• Working knowledge of JavaScript/TypeScript, and of how React Native's native layer (JSI, Codegen, the bridge) passes data, events and work between threads.
• Hands‑on experience integrating Android with physical hardware over wired interfaces, such as serial/UART, GPIO or USB, on phones, tablets or embedded Android devices.
• A strong grasp of Android threading, coroutines, background execution limits and runtime permissions.
• Comfort debugging across the app and hardware boundary, using tools like serial monitors, logic analyzers and logcat.
• Familiarity with Scrum or Kanban, the full SDLC and testing practices.
• Clear communication with engineering and non‑engineering stakeholders, and good task management.
• Willingness to work in person at our hardware manufacturing facility in Schenectady, NY.

Nice‑to‑Have Skills

• Familiarity with hardware interfaces and protocols such as UART, I2C, SPI, CAN and GPIO.
• AOSP or custom Android hardware (kiosks, embedded displays, payment terminals).
• Experience in EV charging, energy, IoT, connected devices or smart hardware, including OCPP or UL 1998.
• Building test apparatus for hardware or firmware validation.
• General electrical safety knowledge.

Compensation And Benefits

• The base salary range for this position is $ 95,000-$145,000 per year
• Eligibility for an annual performance bonus and additional benefits.
• Final compensation will be determined based on experience and qualifications.

Why Join Nayax

• Make a tangible impact by building tools that are used across a global support organization.
• Take ownership from day one and see your work drive measurable business outcomes.
• Collaborate with experienced engineers, product leaders, and support experts across the company.
• Work in a high-growth environment where your ideas can quickly become reality.
• Be part of a global fintech leader transforming how people pay, engage, and do business.

Learn More about Nayax

Founded in 2005, Nayax is a global fintech leader providing end-to-end payment, consumer engagement, and business management solutions. We help businesses grow revenue, reduce operational complexity, and deliver seamless commerce experiences across unattended, self‑service, and retail environments.

With support for 80+ payment methods across 50+ currencies, a European payment institution license, and strategic partnerships with leading global financial institutions, Nayax enables secure, scalable, and future‑ready commerce worldwide.

Operating across 120+ countries with 1,200+ employees in 13 global offices, Nayax combines innovative technology with real‑world impact. At Nayax, we build long‑term value through smart automation, loyalty solutions, and an agile ecosystem designed to scale with our customers - and our people.