Senior Software Engineer
21 Oct 2025
Paris, France
Verified by Turrior
Content + Source + Freshness • 14 Dec 2025 • 95% confidence
82 / 100
Offer value
Role provides a critical drive for software solutions in a sustainable tech context, with clear advancement routes and impactful contributions.
- Engaged work in developing software solutions for sustainability
- Strong career progression opportunities
- Valuable experience in a pioneering tech environment
Pros
- Opportunity to directly affect CO2 reduction through technology
- Full-stack development experience in a meaningful sector
- Supportive international team environment
Cons
- Onsite work in Paris restricts flexibility for remote opportunities
- Potential high demands and fast-paced workflow
- Focus on R&D may limit immediate product visibility
Who it's for
Senior / Mid-Senior • Onsite
Good fit
- Developers with a strong background in full-stack technologies
- Innovators passionate about environmental sustainability
- Tech professionals ready for a dynamic environment
Not recommended for
- Newcomers to software development
- Candidates needing fully remote work
- Individuals uninterested in sustainability goals
Motivation fit
Desire to contribute to impactful CO2 reduction effortsInterest in a fast-paced and innovative work cultureCommitment to collaborative and interdisciplinary approaches
Key skills
Full-stack development (Python, React)Data engineering and SQL knowledgeExperience with DevOps and CI/CD
Score: 82/100 AI verified analysis
About the job
About Dioxycle
Dioxycle is pioneering breakthrough carbon utilization technologies that convert industrial emissions into sustainable chemicals with unprecedented energy and cost efficiency. By displacing fossil fuels for the production of key chemicals, Dioxycle has the potential to ultimately reduce over 800 million tons of CO2 per year, representing over 2% of the world's emissions.
At the core of our process is a novel "carbon electrolyzer", a machine capable of using just electricity and water to convert carbon emissions back into valuable everyday essential chemicals. Our team is innovating across chemical, mechanical and system engineering to turn carbon transformation into an economically feasible, industrial reality through this completely novel technological approach. Having completed our medium-scale Proof-of-Concept electrolyzer, we are now working towards a first-of-its-kind large-scale industrial prototype and are assembling key partnerships for future commercial roll-out.
We are supported by world-class funders including Lowercarbon Capital, Breakthrough Energy Ventures and Gigascale Capital and have raised $37M to date. We operate from two centers in Paris and California (so whether you are passionate about outdoors or good food/art scenes, we have a location for you to join!)
Your Mission
Dioxycle is developing an in-house platform to control lab-scale electrolyzers and industrial prototypes in its different facilities and collect the data they produce. We are seeking a Senior Software Engineer to take full responsibility of the development and maintenance of this platform which is used daily by our engineers, playing a crucial role in supporting our mission of abating CO2 emissions by turning them into products we use every day.
In this capacity, your responsibilities will center around:
- Full stack development: develop our control system software (Python, React [TypeScript], PostgreSQL, C, etc.);
- Data engineering: put in place scalable ETL processes for our experimental and production data, develop data dashboards to support the R&D team analyses
- DevOps: develop a CI/CD process, manage our local and cloud infrastructure (AWS)
Abilities and expertise we are looking for
- Full stack web development experience with Python and React (TypeScript) (minimum of 2 years experience but beyond that, proven track record, talent & mindset matters more than years of experience alone);
- Data engineering expertise: SQL, python, building scalable data pipelines;
- Some DevOps experience (especially AWS);
- Highly collaborative, problem solving oriented;
- Product culture/mindset;
- Any data science experience is a plus, but not a requirement;
- Excited to work onsite in Paris (Saint-Ouen) full-time (occasional work from home): we are an industrial deeptech start-up who are all onsite everyday driving our super fast R&D iteration cycles through experimentation.
Mindset we are looking for
- Commitment to the mission and ambition
- Irreproachable work ethic
- Innovative spirit and problem-solving attitude
- Anticipation capabilities
- Safety and security awareness
- Radical open-mindedness: no ego. Ideas first
What we have to offer
- Unique journey: We are an early-stage company with a world-class team and a flat structure.
- Impact: We are building a product that will reshape century-old industrial processes to build a better, more sustainable and resilient world
- People-first: We love our people. We are excited to see one another every morning when coming to work. We choose people and they choose us to share a similar excitement.
- Feedback over ego: We are self-improving whilst helping others grow. We are no-ego doers and we are all responsible for shaping the company.
- International team: We are an international team made up of over 12 nationalities, and hopefully many more soon!
- Fun: We constantly strive to cultivate a great work atmosphere and organize regular team events.
- Competitive compensation packages
- Generous Employee Stock Ownership plans
- Health Insurance: Medical, dental, and vision coverage.
- Ergonomic work stations & state-of-the-art equipment
Our process
- Intro call with our Senior Software Engineer, Armin (30 mins)
- Initial discussion (30 mins) with Head of People to discuss Dioxycle's mission, get to know you, and answer your questions
- 90-min technical workshop including a presentation of your career and skillset followed by questions and case studies with our team
- 45-min Cofounder interview with Sarah, Cofounder & CEO
- A final on-site series of interviews and an opportunity to meet the team
- A series of reference calls with provided contacts
