Contact person: IoT Backend Development for Smart Lockers

Phone:Show

Email:Show

Location: Riyadh, Saudi Arabia

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Smart Locker Backend Developer
Project Overview
We are building a smart locker system designed for large-scale deployment in Riyadh. The system integrates dual cameras (QR scanning + internal monitoring), smart locks, LED indicators, and cloud storage. The hardware is based on Raspberry Pi Compute Module 4 (CM4102008) and will connect via Wi‑Fi.

You will be responsible for backend development, API architecture, and cloud integration. The front-end, hardware assembly, and business operations will be handled in-house.

Responsibilities
Design and implement backend services to manage:

QR code scanning verification

Lock control (trigger via API)

Camera recording and cloud uploads

Status monitoring (LED indicators, logs)

Create secure REST APIs / WebSockets for mobile app and hardware integration

Implement cloud storage for recorded clips (e.g., AWS S3, Firebase, or custom server)

Optimize system for scalability (hundreds/thousands of lockers)

Develop admin dashboard backend for monitoring and management

Implement basic security layers (JWT auth, encryption for data in transit)

Provide documentation and handover for smooth future maintenance

Required Skills
Strong experience with Python (Django / FastAPI / Flask)

Expertise in Raspberry Pi / CM4 and camera APIs (libcamera, picamera2)

Proficient in cloud services (AWS / Firebase / Google Cloud)

Experience with RESTful API development and WebSockets

Knowledge of IoT device communication protocols (MQTT optional)

Familiarity with SQL / NoSQL databases (PostgreSQL, Firebase Realtime DB)

Understanding of basic cybersecurity practices (secure API endpoints, token auth)

Version control (GitHub) and CI/CD workflows

Strong communication and ability to document code

Milestones
Milestone 1 – Backend Architecture & API Design (20%)
Deliver system architecture diagram

Define API endpoints (QR, locks, cameras, status)

Database schema and cloud storage plan

Basic documentation

Milestone 2 – QR Code & Lock Control API (20%)
Implement QR code verification workflow

Lock control via GPIO triggers (through API)

Basic test with hardware prototype

Milestone 3 – Camera Integration & Cloud Upload (20%)
Integrate dual camera feeds (QR + internal)

Trigger recording on events (QR success or lock open)

Upload clips to cloud storage with metadata

Milestone 4 – Monitoring & Admin Features (20%)
API for status logs (locker usage, errors)

Backend for LED indicators and health check

Basic admin panel (API-based)

Milestone 5 – Testing, Optimization & Documentation (20%)
Stress test for multiple lockers

Optimize cloud usage & storage costs

Final documentation (API + architecture + deployment)

Payment Terms
Payment released per milestone upon review and approval

Code delivered via private GitHub repository

Clear commit history and regular progress updates required

Additional Notes
Front-end (mobile/web) will be developed separately

Hardware assembly and enclosure are handled internally

The freelancer focuses only on software backend + cloud integration

How to Apply
Share similar IoT / Raspberry Pi or cloud projects you’ve built

Confirm experience with camera streaming and storage

Provide estimated timeline and cost for the milestones" (client-provided description)