Hello Watt
hellowatt.fr
Actively hiring
Energy Efficiency
Energy Management
View 2 jobs
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Overview
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Tech stack
Technologies named in job postings at Hello Watt over the last 12 months, by layer, with the share of postings for each.
Technologies in use
33
Postings analysed
5
Stack modernity
90/100AI adopter
Languages
Python
TypeScript
JavaScript
SQL
Frameworks & libraries
Django
React.js
Tailwind CSS
Alpine.js
Databases
MySQL
Redis
Cloud & platforms
AWS
Amazon S3
GitLab CI
GitLab
AI & ML
ChatGPT
Claude
Gemini
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Full Hello Watt tech stack
33 technologies · by team · pay by technology · changes · similar stacks
Salary insights
Compensation ranges based on this company's open jobs
Median
$31k
Typical range
$11k – $96k
Open positions
8
2
Jobs
Senior
50%
Architect
50%
| Level | Jobs | Median | Typical range |
|---|---|---|---|
| Senior | 1 | $90k | $90k |
| Architect | 1 | $96k | $96k |
Highest paying role
Head of Partnerships (H/F)
$96k
Normalized to USD per year
All salaries at Hello Watt
By role, level and city, against the market · 8 jobs with pay
People
Xavier Coudert
Directeur Général
Sylvain Le Falher
Président de SAS
Names and roles come from public filings, company registers and the company's own site. Is this you? Correct or remove · How we handle this data
Growth
Hiring Momentum
82/100
Scaling fast
Open positions
12
3 opened / 7 closed in 30 days
Median time-to-fill
17 days
faster than 61% of the market
ATS activity
Every ~4 hours
Today
Hiring Dynamics
+100%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Sales
17% ▲
Backend
11% ▲
Frontend
11% ▲
Communications
11% ▲
Finance
11% ▲
HR
11% ▲
Activity Timeline
Added Power BI to stack
Oct 2026
New location: Málaga
Oct 2026
New location: Valencia
Oct 2026
Added Gemini to stack
Oct 2026
Added Claude to stack
Oct 2026
Added ChatGPT to stack
Oct 2026
Added SQL to stack
Oct 2026
Added Redis to stack
Oct 2026
Added GitLab to stack
Oct 2026
Added Celery to stack
Oct 2026
Added Google Sheets to stack
Oct 2026
Added Slack to stack
Oct 2026
Offices
Where the company hires and what each office is for
Cities
2
Hiring now
2
Countries
2
Busiest office
Paris
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Headquarters
Builds here
Office with open vacancies
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Paris
France
HQ
Changez de fournisseur d'énergie
10 open roles 13 posted in 90 days 10% engineering $50k Avg Salary
hires for Communications, Finance, Sales
75018 Paris
Valencia
Spain
2 open roles 3 posted in 90 days 50% engineering $11k Avg Salary
hires for Analytics, Operations
Earlier presence
Málaga, Spain
Jobs
$11k per year · Hybrid · Internship · Valencia
Python
SQL
Power BI
Apply
$61k – $89k per year · Hybrid · Full-Time · 5+ years exp · Paris
Python
JavaScript
TypeScript
SQL
Flask
FastAPI
Django
Celery
Sanic
Databases
MySQL
Redis
Frontend
Vue.js
Tailwind CSS
Angular
React.js
DevOps
Rest API
GitLab CI
CI/CD
AWS
GitLab
Amazon S3
Apply