Design a smart utility meter monitoring platform
PremiumIoT systemMedium
- Iot ingestion
- Time series
- Stream processing
Quick answer
This ioT system interview question asks you to design a smart utility meter monitoring platform. Aim for a design that collects data from many devices and acts on it reliably, then explain device connections, ingestion, storage and trade-offs. Interviewers want to see how you handle unreliable networks, device scale and data volume.
The problem
Design a Smart Utility Meter Monitoring Platform for a large regional electricity provider. The utility has deployed millions of smart meters to residential and commercial properties. These meters continuously send electricity consumption readings (kWh) back to the central platform.
The system must ingest these telemetry streams reliably, as the data directly drives customer billing. Simultaneously, the platform must analyze the incoming stream in near real-time to detect anomalies—such as a sudden, massive spike in usage indicating an electrical fault, or a "zero reading" indicating a localized power outage—and dispatch alerts.
What must a smart utility meter monitoring platform do?
- Telemetry Ingestion: Continuously accept and securely store reading payloads (Meter ID, Timestamp, kWh value, Status Code) from smart meters.
- Anomaly Detection: Evaluate the incoming data stream to detect sudden consumption spikes or drops, triggering alerts within 5 minutes of occurrence.
What scale should you design for?
Use these numbers in your estimates.
The scale numbers unlock with this questionUnlock
Key concepts
- Iot ingestion
- Time series
- Stream processing
- Data tiering
- Event driven
How you’ll practise
- Requirements
- Estimate
- Device and connectivity
- Ingestion and processing
- Device management and updates
- Wrap-up
Lala, personalized to you, gives a hint when you ask and reviews your design when you are ready.
What do interviewers look for?
In any IoT system design round.
- Clarifies device count, message rate and payload size
- Handles devices that go offline and reconnect
- Plans ingestion that absorbs bursts
- Separates hot real-time data from long-term storage
- Covers device identity, updates and security
- Explains what runs on the device and what runs in the cloud
Questions people ask about this interview question
- Which design type is this question?
- It is an ioT system question. You design a smart utility meter monitoring platform and explain your choices the way you would in an interview.
- Is this question asked at entry level?
- It is marked Medium. Entry-level engineers can practise it, but it expects you to reason about requirements and trade-offs, not only list components.
- What should I cover first?
- Start with the devices, what they send, how often and what must happen with it. Agree on scope with the interviewer before you design anything.
- Can I practise it for free?
- It is a premium question. Sign up and unlock it once for 10 credits; it then stays unlocked. When you finish, Lala, your personalized AI mentor, can review your design for 30 credits.
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Updated · Written by the SevyDevy team