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Tidewell

Flood early warning for the coastal towns of the Gulf of Guinea · Lagos, Nigeria · Non-profit

tidewell.example ↗

A story from Ayetoro, on the Ondo State coast

The alert came forty minutes before the water. Forty minutes is enough to carry your grandmother out.

Tidewell sends flood alerts to 2.4 million people in 41 coastal towns on the Gulf of Guinea. Ronke got hers by SMS, in Yoruba.

Founded
2022
First alerts sent in 2023
Team
22 people
plus 41 radio operators
Offices
Lagos
Field base in Ayetoro
Organisation
Non-profit
Grant-funded
Reach
41 towns
2.4M people, 4 languages

Our mission

Flood warnings already exist. Most of them never reach the people standing in the water.

National agencies publish forecasts on websites, in English, hours late. In the fishing towns along the Gulf of Guinea, people find out from the tide.

Tidewell turns river gauge data into alerts that arrive by SMS, voice call and community radio, in Yoruba, Ijaw, Pidgin and English. In 2025 we tested alerts with a short local story attached, and three times as many households moved to higher ground. Every role we hire for makes one of those steps faster or more trusted.

  • 01 · Measure

    River gauges

    Sensors in 41 towns report water levels every 15 minutes, maintained by the towns that host them.

  • 02 · Forecast

    Where the water goes

    Our hydrologists model what the river will do next, and how sure we are about it.

  • 03 · Warn

    An alert people act on

    SMS, voice call and community radio, in four languages, with a local story attached.

Open roles · 3

Tidewell is hiring people to build the next forty minutes

  • Tidewell · Mid-level

    Flood Storyteller

    Turn every forecast into a message people believe, in four languages, and build the library of local flood stories behind it.

    Lagos, NG (hybrid)$70,000 – $90,000

  • Tidewell · Junior

    Radio Network Coordinator

    Keep 41 community radio operators ready for flood night: training, spare parts, schedules and a phone that always answers.

    Ayetoro, NG$45,000 – $55,000

  • Tidewell · Junior

    Junior Forecasting Analyst

    Check every forecast against what the river actually did, and write up where the model was wrong.

    Lagos, NG (hybrid)$40,000 – $50,000

None of these fit you?

New roles appear here as they open.

The people at Tidewell

22 people in Lagos, plus 41 radio operators in the towns we serve.

  • Priya Sharma

    Engineering lead

    Ask her about the night the network went down mid-flood.

  • Daniel Kim

    Hydrologist

    Ask him why rivers lie on Mondays.

  • Ayo Bankole

    Field operations

    Ask him which canoe has the best signal.

  • Sarah Mitchell

    Product designer

    Ask her how to write an alert in 160 characters.

  • Amara Okafor

    Community partnerships

    Ask her about the 41 radio operators by name.

  • Marcus Chen

    CTO

    Ask him which two numbers he checks every morning.

Not sure which role is yours? Talk to Ayo for 15 minutes.

No CV needed. Ask anything about the work, the towns, or the team.