Software Engineer - Paris

SUSTAINSOFT

💡 Transition partners
Long-term contract
Localisation Paris, France
Impact
Full remote
From 3 to 5 yrs of exp.
Posted on 11-28-2025

➔ Description of the mission

Our mission

SustainSoft's mission is to empower organizations to embrace sustainability and drive positive change.

Our ambition is to develop the leading European SaaS solution enabling companies to measure, improve, and communicate their sustainability strategy.

➔ Profile

The profile we are seeking

We're seeking a Software Engineer to steer the whole tech team towards successful project completion, coding best practices implementation and maintain overall quality of SustainSoft’s front- and back-end applications. You'll play a crucial role in defining and executing tech strategy and implement it to ensure the product roadmap is met. As the primary point of contact with the Product Team, you'll oversee the development, maintenance and optimization of server-side components of our software and ensure a delightful user experience. Overall, you'll participate in the technical directions to take, participate in product design and feature development and ensure code quality and optimization.

Your role, initially operational, will quickly evolve, given the rapid growth of the company, into more strategic responsibilities including team management.

Your missions

  • Actively participate in the development of our product and its new features
  • Ensure permanent codebase cleaning to facilitate scalability
  • Define the right technologies and strategies for front- and back-end
  • Manage feature development from end to end
  • Ensure high quality code and optimize application performance
  • Structure and improve the implementation of best practices
  • Prioritize new features and sprints based on business & tech critical needs
  • Provide code documentation and other inputs to technical documents
  • Troubleshoot and debug to optimize performance
  • Help in recruiting your tech teammates
  • Collaborate with cross-functional teams to align development with business goals
  • Stay up to date with emerging technologies and incorporate them into projects
  • Review and provide feedback on code and design

Ideal profile & experience

We're seeking a dynamic individual with a proactive mindset, ready to tackle diverse challenges and take ownership of various issues. The primary skill required is to feel confident when making decisions and take ownership of those in any situation to align with our “doer” culture. Additionally, the ideal candidate should thrive in unstructured environments, excel at multitasking, and demonstrate an entrepreneurial spirit.

Key skills include:

· Previous experience as a Fullstack Developer with NextJS and GraphQL

· Excellent knowledge and execution skills in back JavaScript

· Client-centric attitude: our success hinges on developing applications that are useful for our customers

· Thrive in an ever-changing environment, navigating through ambiguity with ease

· Maintain a goal-oriented approach

· Strong interest in sustainability and curiosity to explore various CSR topics and frameworks as well as different industries, embracing the diversity of challenges with enthusiasm and adaptability

· Excellent oral and writing skills

· Fluent French + English is a plus while fluent in Typescript is mandatory 😊

· Previous experience in a startup is a plus

Technologies we use:

· Javascript/Typescript

· Next.js

· Graphql

· TailwindCss

· NoSql (Google Firebase)

· Algolia

· Storybook

· Figma

What we offer

  • Competitive salary (fixed + attractive variable, depending on your experience) + possible equity compensation
  • A culture promoting excellence and personal growth while also prioritizing human connections and personal impact inside the company
  • Growth within SustainSoft as one of our key hires
  • Remote-friendly culture
  • Office location in the heart of Paris
  • The essentials (Alan, Pass Navigo, computer...)

SUSTAINSOFT

SustainSoft démocratise l'accès à la RSE pour les PME et les ETI. Elles n'ont ni le temps, ni l'expertise pour répondre aux questions RSE de leurs clients et employés ou des réglementations (CSRD...).

💡 Transition partners

The mission of this structure is to help companies and citizens improve their environmental and social impact. For example, CSR consulting, training, raising awareness of transition issues, media, etc.

More information
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  • Impact
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