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Hello Watt Tech Stack

Energy consumption app and solar installation platform for French homeowners

Environmental Services Paris, Ile-de-France 201–500 employees Founded 2017 Self-Owned

Hello Watt pairs a consumer app (2M+ downloads) with field installation services for solar, heat pumps, and EV chargers. The stack is classical Python/Django/Redis backend on AWS with Flask/FastAPI microservices, plus heavy reliance on Data Studio and SQL for consumption tracking—a lean, data-first architecture suited to the energy transition use case. Hiring velocity is decelerating while internship intake remains high (21 of 49 open roles), suggesting a shift from pure growth mode toward operational efficiency and margin improvement.

Tech Stack 57 technologies

Core StackPython Django Celery Redis MySQL MongoDB AWS AWS RDS GitLab CI/CD GitLab Canva Flask FastAPI Excel SQL PowerPoint Data Studio AWS Elastic Beanstalk Linear Slite Instagram TikTok X Meta YouTube LinkedIn Hootsuite Photoshop CapCut Sanic+27 more

What Hello Watt Is Building

◆Challenges

Reducing energy bills
Optimizing operational processes
Expanding internationally
Accelerating energy transition
Improving sales performance
Optimizing user acquisition and conversion
Accelerating decarbonization
Transition énergétique
Scaling sales operations
Accelerating integration with manufacturers

▲Active Projects

Video content production
Energy flexibility features
Tracking improvement on website and app
Seo optimization for content
Automating performance reporting
Solar panel installation
International expansion
Strategy and business development
User journey implementation
Solar photovoltaic projects

Hiring Activity

Decelerating50 roles · 15 in 30d

Department

Sales

15

Marketing

12

Product

6

HR

4

Ops

3

Data

2

Finance

2

Operations

2

Seniority

Intern

21

Mid

11

Junior

5

Manager

5

Director

2

Senior

2

Lead

1

Notable leadership hires: Head of People, Organic Growth Head, Solar Director

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About Hello Watt

Hello Watt helps French households reduce energy bills and decarbonize their homes through two integrated channels: a mobile and web app that measures and optimizes consumption, and a direct installation service deploying solar panels, batteries, heat pumps, and EV charging stations. The app now tracks 2M+ users across France. The company also operates installation operations and is expanding geographically into Spain and broader Europe. Founded in 2017, Hello Watt is self-owned with 201–500 employees based in Paris.

HeadquartersParis, Ile-de-France

Company Size201–500 employees

Founded2017

Hiring MarketsSpain, France

Frequently Asked Questions

What is Hello Watt's tech stack?

Python, Django, Flask, FastAPI, Redis, MySQL, MongoDB, AWS (Elastic Beanstalk, RDS), GitLab CI/CD, Data Studio, and SQL form the core. Frontend and marketing ops use Instagram, TikTok, LinkedIn, Hootsuite, Canva, and Photoshop.

Where is Hello Watt hiring?

Hello Watt has 49 active roles, with recent posts in France and Spain. Top hiring: sales (15 open), marketing (12), product (6). Most roles target interns and mid-level candidates; velocity is decelerating.

What is Hello Watt working on?

Current priorities include energy flexibility features, solar panel installation expansion, international scaling, SEO and tracking optimization, sales automation, and integration with solar equipment manufacturers.