À propos
We are building a real-time emergency coordination and mobility platform that combines:
Public emergency intake (WhatsApp-based)
Dispatch & routing engine
Live ambulance / vehicle tracking
Hospital coordination layer
On-demand health transport services
We currently operate core logic on Google Apps Script and have AWS infrastructure already provisioned.
We are now ready to migrate to a production-grade Python backend while maintaining uninterrupted live operations.
This must be a zero-downtime architectural transition.
Core Objective
Design and implement a scalable, production-ready system that:
Displays live ambulance / vehicle GPS locations on a real-time map
Ingests and validates secure GPS device data
Syncs emergency cases into a dispatch dashboard
Manages full case lifecycle (Created → Assigned → Enroute → Arrived → Closed)
Handles hospital routing, availability, and ACK logic
Provides analytics (response time, ETA accuracy, SLA tracking)
Supports communications resilience (WhatsApp, SMS, Voice fallback)
Is architected for multi-city scale from day one
Migration Requirement (No Service Interruption)
We need to:
Transition from Google Apps Script to a Python backend (FastAPI or Django preferred)
Introduce PostgreSQL (or equivalent production database)
Implement WebSockets / event-driven architecture
Ensure live system continues operating during migration
Gradually phase traffic from legacy system to new backend safely
Downtime is not acceptable.
Satellite & Intelligence Integration (Forward-Looking)
The system should be designed to support future integration of:
Weather intelligence APIs
Traffic intelligence APIs
Risk-layer overlays
Satellite-derived situational awareness data
We do not need full satellite integration immediately, but the architecture must allow for geospatial data layers and external intelligence feeds without major refactoring.
Experience with GIS layers, mapping intelligence, or geospatial APIs is a strong plus.
Health Mobility Expansion (PHC Transport Module)
We are also preparing to launch Nexus PHC Connect, a coordinated transport module enabling fathers to pre-book subsidized rides to Primary Health Centres (PHCs) for child health appointments.
This will require:
Ride pre-booking logic
Intelligent routing optimization
Subsidy tracking
Community-based pilot rollout
Integration with existing dispatch system
The platform must support both:
Emergency dispatch
Scheduled health mobility services
Unified architecture is required.
Communications Resilience (Low-Connectivity Ready)
The system must support:
WhatsApp-first communication
Automatic SMS fallback
Voice IVR intake capability
SMS-based operational commands for drivers
Reliable message handling in low-data environments
We are building for emerging-market infrastructure realities.
Scope of Work
You will:
Architect scalable AWS backend
Design production database schema
Build secure GPS ingestion layer
Implement real-time dispatch state machine
Develop live fleet map dashboard
Build hospital ACK & fallback logic
Design concurrency-safe case management
Prepare architecture for AI-assisted optimization
Ensure smooth legacy-to-Python transition
This is a systems architecture role, not just feature development.
Ideal Candidate
5+ years full-stack engineering
Strong Python backend experience
Experience building real-time systems (fleet, logistics, ride-hailing, emergency tech)
Comfortable with WebSockets, queues, concurrency control
AWS architecture & scaling experience
Experience with geospatial systems is a plus
We are not looking for junior developers.
We need someone who can think in infrastructure, event flows, and scale.
Engagement
6–10 week milestone build
Potential long-term technical leadership role
To Apply
Please include:
Your proposed Python + AWS architecture
How you would handle zero-downtime migration
Your real-time GPS ingestion design
How you would structure this for multi-city scale
Examples of similar systems you've built
If you've built systems where reliability and real-time decisions matter, we'd like to speak with you.
Contract duration of 1 to 3 months.
Mandatory skills: Python, Amazon Web Services, API, Amazon EC2
Compétences linguistiques
- English
Avis aux utilisateurs
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