About the Role

AFEX is expanding our engineering team and seeking a highly capable Mobile & Embedded Connectivity Engineer to build the next generation of our mobile, desktop, and cloud-connected tooling. This role centers around creating a multi-platform .NET MAUI application (iOS, Android, Windows), PC utilities, and OTA-capable communication interfaces to our embedded control units.

You will own the architecture and implementation of the AFEX app ecosystem:

Cross-platform mobile/desktop application
AWS cloud backend with secure authentication
Tools that communicate with MCUs via BLE, Wi-Fi, and USB
OTA firmware update pipeline
Technical-documentation portal with PDF rendering

This is a deep technical role bridging mobile, cloud, and embedded systems.

Key Responsibilities

Cross-Platform App Development

Build and maintain a .NET MAUI application targeting iOS, Android, and Windows.
Use C# async/await, MVVM, and modern .NET patterns.
Implement secure login flows using OIDC + PKCE, deep links, and token refresh.
Integrate in-app access to technical documentation (PDFs, manuals, drawings) using SkiaSharp for rendering.
Design clean and intuitive UI/UX optimized for technicians and field engineers.

Hardware / MCU Communication

Develop reliable communication with AFEX MCU-based devices using:
Bluetooth LE
Wi-Fi
USB/virtual COM ports
Implement features for:
Configuration read/write
Data logging and diagnostics
Field-test tools
Over-the-air (OTA) firmware updates
Work closely with STM32/ESP32 firmware developers to define binary protocols.

PC-Based Tools

Build companion desktop utilities (MAUI or standalone .NET apps) for:
Device commissioning
Extracting logs
Automated configuration workflows
Use Python or PowerShell to create small maintenance or deployment scripts.

Cloud Services & Backend Development

Build backend systems with AWS CDK (C#) and core services:
Cognito (authentication)
API Gateway
Lambda (Minimal APIs in .NET)
S3 (firmware + documentation storage)
DynamoDB (user and device metadata)
CloudFront (secure content delivery)
KMS (encryption)
Implement secure API communication between the app and AWS backend.
Manage firmware-update hosting, versioning, and release management.

Collaboration & Workflow

Use Git and GitHub with strong branching, tagging, and PR discipline.
Participate in design reviews with embedded, hardware, and test engineering teams.
Document communication protocols, API endpoints, and onboarding guides for internal teams.

Required Skills & Experience

5+ years of professional experience in software development.
Strong experience with .NET (C#) and .NET MAUI for multi-platform apps.
Expertise with async programming, MVVM, and modern .NET architecture.
Experience communicating with embedded devices:
Bluetooth LE
Wi-Fi TCP/UDP
USB serial
Hands-on experience implementing MCU firmware-update systems (OTA preferred).
Strong understanding of AWS services, especially:
CDK (C#)
Cognito, API Gateway, Lambda, S3, DynamoDB, KMS
Experience implementing secure authentication flows (OIDC, PKCE).
Familiarity with Git-based workflows and CI/CD pipelines.

Preferred Qualifications

Experience with SkiaSharp, vector graphics, and PDF rendering.
Background working with STM32, ESP32, or similar MCU platforms.
Understanding of binary protocols, CRCs, and field-update safety.
Experience building technician-friendly apps for industrial/automotive environments.
Python or PowerShell scripting for automation.
Knowledge of deploying global mobile apps (Apple Store / Google Play).

Job Type: Full-time

Pay: $60,000.00 - $120,000.00 per year

Benefits:

401(k) matching
Dental insurance
Health insurance
Health savings account
Life insurance
Paid time off
Vision insurance

Application Question(s):

Do you need Sponsorship now or any time in the future?

Experience:

Mobile & Embedded Connectivity Engineering: 5 years (Required)

Ability to Commute:

Raleigh, NC 27616 (Required)

Work Location: In person

AFEX

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