Product design: keeping a Mars landing crew connected to Earth and to each other
Company: Walmart Labs
Role: Product Manager
Category: Product Design & Strategy
Difficulty: medium
Interview Round: Other
You are the product manager responsible for how astronauts communicate on a crewed mission that lands on Mars. Design the communication product: say who it serves, which communication problems you would solve first, what you would build, and how you would judge whether it works.
```hint Start from what Mars breaks
Messaging on Earth assumes near-instant replies and a connection that is almost always there. Work out which of those assumptions fail between Earth and Mars, and which crew moment suffers most when they do, before you list any features.
```
### Clarifying Questions
- Which mission phases are in scope: the months in transit, the entry, descent and landing sequence itself, the surface stay after touchdown, or all of them?
- Is the scope crew-to-Earth communication (mission control, scientists, families), communication among crew members on and around the surface, or both?
- Am I designing the crew-facing product on top of ground antennas and relay orbiters that other teams provide, or also choosing the underlying links and hardware?
- How large is the crew, and does anyone stay in orbit while the others land?
### What a Strong Answer Covers
- A deliberate choice of primary user among the crew, mission control, scientists and families, justified by the prompt's focus on astronauts
- Pain points rooted in Mars-specific constraints: minutes of one-way signal delay, scheduled and unscheduled loss of contact, scarce shared bandwidth, and no outside help nearby
- Features built for asynchronous, delay-tolerant communication rather than live calls, ranked by their effect on crew safety
- Success measures that fit a crew of a few people, testable in ground simulations before launch as well as in flight
- Risks such as single points of failure, alert overload and crew isolation, each with a mitigation
### Follow-up Questions
- During the landing sequence the crew cannot wait for an answer from Earth. What does the product do in those minutes, and which decisions does it support onboard?
- For about two weeks around solar conjunction, the Sun blocks every link between Mars and Earth. How does the product behave during that stretch, and what has to be prepared beforehand?
- Science data, vehicle telemetry, procedure updates and personal messages home all compete for the same limited link time. How would you allocate it, and who should decide?
Overview: A product design question about building a communication system for astronauts on a crewed mission that lands on Mars. It tests choosing the primary user, reasoning from the constraints of deep-space communication, prioritizing safety-critical features and defining success metrics for a product that cannot fail.