About Aqunia
Aqunia Inc. is a climate tech startup founded in 2025. Our mission is to deliver flood forecasting and water resource prediction systems to governments and communities worldwide by combining advanced hydrological simulation technologies , AI, and observation data. We are particularly focused on expanding into countries in the Global South.
Our CEO, Satoru Demoto, obtained the meteorologist certification at the age of 14 and later conducted climate change research at the Atmosphere and Ocean Research Institute, University of Tokyo. He has more than a decade of experience in strategy consulting, AI startup management, and co-founding of a climate tech start-up.
As of early 2026, our team consists of 12 members. We are actively developing our product and advancing diverse projects with support from organizations such as Japan’s Ministry of Economy, Trade and Industry, the Tokyo Metropolitan Government, private foundations, and development agencies.
Position Overview
As a Hydrology & Climate Modeling Engineer, you will play a central role in developing forecasting models.
Responsibilities
- Develop and improve weather forecasting models (e.g., precipitation) using physical simulations and AI
- Build hydrological prediction models (e.g., flood forecasting, water resource prediction)
- Design calibration and validation schemes for real-world deployment
- Analyze satellite, radar, and reanalysis data (e.g., ERA5, SWOT, GSMaP)
- Collaborate on joint research projects with university partners
Required Skills & Experience (at least one of the following)
- Master’s or PhD in hydrology, meteorology, climate science, or a related field
- Research or professional experience applying AI/machine learning to geoscience or environmental modeling
- Research or professional experience using satellite, radar, or reanalysis data
Desired Mindset
- Strong passion for climate change adaptation and real-world implementation
- Proactiveness: ability to formulate hypotheses, design experiments, and drive projects with minimal supervision
- Teamwork: ability to respect diverse perspectives and work collaboratively toward optimal solutions
- Mission-driven: motivated by improving climate resilience in communities
Working Conditions
- Employment type: Full-time preferred; part-time and contract positions also welcome
- Location: Based in Tokyo (Nihonbashi or Hongo, Bunkyo). Remote work is available; fully remote arrangements are subject to discussion. Applicants based overseas are welcome to apply (subject to discussion).
- Working hours: Flexible (discretionary labor system)
- Language: Japanese or English required; proficiency in both is preferred
- Visa sponsorship: Available in some cases; please discuss upon application
- Compensation: Negotiable based on experience and contract type
- Days off: Two days off per week (Saturday and Sunday), plus national holidays