Full Stack Developer - Impact Startup (M/F)

Democratizing LCA for businesses

Holis enables any company to quantify, improve, and communicate the socio-environmental performance of all its products

By facilitating the performance of life cycle assessments (LCA), our SaaS platform allows for the evaluation of entire catalogs in a few minutes and the identification of the most effective eco-design levers.

Thanks to our didactic interface coupled with award-winning automation tools (UNESCO, GreenTech), every initiative can thus be valued, leading to an impact reduction of around 20%. And all this with rigor, as Holis is certified compliant with French and European methodologies (Environmental Display, PEF, ISO, etc.), and supported by recognized partners (ADEME, Microsoft, and many others)

Co-founded in 2022, Holis today counts about twenty engineers, developers, and hybrid profiles combining customer success and environmental sciences. The team you would join has thus already helped improve thousands of products from various industries, and has already accompanied independent artists as well as CAC 40 companies in their transition!

Your missions

You want to put digital at the service of the environment: as a full-stack developer, you will contribute to the improvement of the existing architecture as well as the development of new features. To this end, you will notably:

• Add new graphical functionalities to facilitate eco-design strategies
• Manage users and different access rights

• Integrate AI solutions to automate and secure the collection of environmental and social data
• Design AI processing pipelines to automatically extract and structure data from heterogeneous sources (invoices, supplier reports, technical documents, etc.)

• Optimize calculations to accelerate the measurement of socio-environmental impacts
• Interface the architecture with PostgreSQL for the storage of environmental information

• Deploy solutions and designs conceived with the UX/UI team

Profile sought Your skillset

Back end

• Mastery of PostgreSQL
• Mastery of Express

• Mastery of Postman
• Mastery of Heroku and Git/Github for deployment and code management

• Knowledge of AI APIs and their integration into a back-end architecture
• Notions of data processing and structuring (document parsing, information extraction)

Front end

• Mastery of HTML, CSS, JavaScript
• Mastery of React

• Mastery of Redux and React internal state management tools (useContext)
• Mastery of vercel and Git/GitHub for deployment and code management

• Sensitivity to data visualization (graphs, dashboards) for the reporting of social and environmental results

Prototyping tool (optional)

• Mastery of Figma

Soft skills

• Good communication skills
• Taste for teamwork

• Sufficient writing skills to describe new features
• Mastery of English

Your profile

• You want to commit to solving socio-environmental problems and measuring the impact of as many products as possible
• You have a thirst for learning and are constantly seeking to improve

• You have the desire to understand client needs
• You are looking for a dynamic environment and want to contribute to the development of an impact startup

• You do not (necessarily) fill all the boxes above, but you learn quickly and are not afraid of it

The team

• Join an engaged and enthusiastic team, ready to support you with kindness in a dynamic of rapid empowerment!
• Today, we are 22 people with varied and complementary profiles (LCA expert, biodiversity, mechanical engineer, developer, design, sales, etc.), concerned with reducing our society's impacts on the environment as quickly as possible

Details of the offer

Reference: CDI_FSD

Type: CDI

When: From January 2027

Where: Paris BnF (M6, M14, Vélib) & Remote work

How much: Depending on profile

Next steps

Our interview process is divided into these three steps:

20 min screening interview

30 min fit interview

Online technical exercice

Interview and technical exercice debrief

Final interview with our founders Paul & Martin

PS : One more thing! Before sending in your resume, please add to its bottom right corner the number related to Responsible Consumption and Production, one of the 17 United Nations Sustainable Development Goals to be achieved by 2030