Who we are

Paris 🇫🇷 (EUR 50,000 - EUR 70,000) + stock options 💰 0-4 years experience 🧪

🌬 Zeffy is leading a transformation in the social economy with its unique zero-fee fundraising platform, currently trusted by over 50,000 nonprofits throughout North America.

🚀 Experiencing a 300% year-over-year growth, we’re just getting started! There’s no better time to join us, as you’ll be among the first 35 employees set to make a tangible impact from day one.

🌱 If that’s not compelling enough for you, we are also proud to hold a B Corp certification.

The Role

In this Full Stack Data Scientist role (under the guidance of our Head of Data), you’ll help build Zeffy’s data architecture and empower teams with the resources and expertise to accelerate growth. 💫

This role is highly versatile and owns project from end-to-end, offering both technical variety (you’ll be involved in tasks ranging from data ingestion, modeling, and visualization to data science and automation) and thematic diversity (finance, product, marketing, strategic projects, success, etc.).

You’ll have the opportunity to grow under the mentorship of your manager and develop a strong expertise in areas we will define together.

Your mission:

• Build and maintain our data model.

• Collaborate with teams to build and implement AI use cases that enhance operational productivity and product quality.

• Support teams in monitoring their KPIs.

• Assist in automating processes across the organization.

• Train teams to enhance their overall data knowledge at Zeffy.

Data at Zeffy:

At Zeffy, we follow a core set of principles and expectations when it comes to data:

✅ Impact over features: Your primary objective is to drive meaningful impact, not just ship features.

✅ Autonomy and empowerment: Our teams can operate pretty autonomously in their daily analysis, our role is to help them on complex use cases and to provide guidelines and best practices across the company

✅ Reliability and scalability: We build data products that are both reliable and scalable. The performance and quality of your work are paramount.

✅ Automation mindset: We prioritize automation to avoid redundancy, freeing up time for high-value projects.

✅ Balancing short- and long-term goals: We allocate time between short-term projects that support immediate team needs and long-term projects aimed at driving greater impact for Zeffy’s growth.

✅ Understanding team priorities: We work with teams that move at different paces, so understanding their priorities and deadlines is critical to maximizing our impact.

🚫 Not just data pullers: We challenge data requests constructively to design optimal solutions that align with the teams’ actual needs.

Our Stack: Snowflake - Metabase - dbt - Hevo (sources: AWS PostgreSQL - Hubspot - Amplitude - Stripe)

🌟 Must haves:

• Proficiency with SQL and Python (especially for data ingestion, machine learning and AI prompt, using packages such as Pandas, Scikit-learn, TensorFlow, etc.)

• Strong business acumen, with the ability to understand team challenges and design the best solutions to meet their specific needs.

• Excellent analytical skills: the ability to dive deep into complex datasets, uncover hidden patterns, and make decisions autonomously based on your findings.

• Clear and concise communication skills: able to present your work concisely and explain complex concepts to non-technical audiences.

🌱 Nice to haves:

You will be able to ramp up on those topics thanks to our Head of Data:

• Experience with a modern data stack.

• Familiarity with building machine learning models

• A passion for mentoring and helping others develop technical skills.

• A critical mindset, with the ability to propose improvements to existing systems.

💡 Research shows that candidates from underrepresented backgrounds often don’t apply for roles if they don’t check every box. If this applies to you and you are interested in the position, we’d love to hear from you!

More on the salary

If your salary expectations are higher than the range specified above, but you believe you’re the ideal candidate for this position and are enthusiastic about Zeffy’s endeavors, we encourage you to apply. We are open to considering candidates with higher seniority if they are the right fit, and to discuss a fair pay.

The range:

• Our ideal seniority level: 0-4 years experience expertise as a Full Stack Data Scientist.

• The corresponding salary range: EUR 50,000 to EUR 70,000, plus stock options.

Perks!

• 5 weeks holiday

• Competitive stock option program

• Health insurance

• Online Medicine with Doctolib

• Wellness Budget

• Team volunteering and activities four times per year

• Offices located in the heart of Paris 11ème, with the possibility of flexible remote work.

• Offsite summit once a year with the entire team

• Developing quickly in a fast-paced environment, alongside an incredible team of kind and impact-driven individuals.

• Call with Recruiter (30min)

• Meeting with our Head of Data (1.5h)

• Case Study (2.5h)

• Team fit with leadership (1h)

• Reference check

• Job offer

Zeffy is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.