CEO Founder Associate - Internship

Bitstack

ABOUT BITSTACK It all started with an idea in 2021. Initially built to democratize Bitcoin in France, Bitstack has gone from a simple product that invests spare change in bitcoin, to a crypto-native bank bringing a better way to save, spend, and grow money to our 300K+ users. We want to rebuild finance from the ground up to empower people to achieve financial freedom by participating in a more open and inclusive financial system. We’re a small, ambitious team of operators. We believe in moving fast, sweating the details, and creating products people truly love. At Bitstack, you’ll have the opportunity to shape not just our products, but the culture and practices of our entire organization. Bitstack is backed by YC, leading VCs like 13books Capital, Stillmark, Serena, and many more. We are building a product our users love and we are just getting started! THE ROLE We are seeking a dynamic and versatile Founder's Associate to work directly with the company's CEO, providing critical support across a variety of projects and functions. As a Founder's Associate, you'll help optimize the CEO's time and resources, working on tasks that span across operations, product development, fundraising, marketing, and strategy. This is a hands-on CEO Right-Hand role where you'll blend ownership with execution. You'll work closely with the CEO to support our growing company, strengthen our processes, and make Bitstack a stellar company. This is an exciting opportunity to gain hands-on experience and impact across all aspects of a fast-growing startup. This is a 6-month full-time internship starting in September 2026, based in Paris with a flexible hybrid setup. You’ll work closely with the founders and leadership team, so regular time in the office will be important for collaboration and learning. The internship will be carried out under a French convention de stage. WHAT YOU'LL BE DOING * Act as a strategic partner to the CEO to drive key cross-functional initiatives and ensure organizational alignment. * Prepare and manage recurring investor and board reports (financial metrics, KPIs, product updates, and hiring progress). * Maintain and update the investor CRM; ensure timely communication and follow-ups. * Support preparation and coordination of board meetings, investor updates, and leadership offsites. * Lead or support cross-departmental projects that enhance growth, operations, or internal processes. * Collaborate with Finance and Operations on performance tracking, budgeting, and headcount reporting. * Build and optimize internal systems for OKR tracking and operational visibility. * Provide data-driven insights to support decision-making and strategic planning. * Partner with Marketing and Product teams to help execute growth and user engagement initiatives. * Manage project timelines, documentation, and follow-ups for strategic and operational priorities. WHAT WE'RE LOOKING FOR * You have 6 months to 1 year of relevant experience in VC / fintech startup ; * You are hands-on and have a “get things done” attitude ; * You have excellent communication and stakeholder management skills and can act as the bridge between different departments ; * Hands-on, proactive, and comfortable switching between finance, product, and admin topics ; * You are highly organized with exceptional project management skills to keep investor outreach and other high-priority activities on track ; * You like to take initiative and find new creative solutions to problems with expertise in balancing and articulating trade-offs ; * You are humble, open to challenge, and like to help others grow with the ability to effectively influence and communicate cross-functionally ; * You’re always looking to learn and are excited about talking to users, partners, and everything around the company ; * Excellent communication in French and English. BONUS POINTS : * You are passionate about Bitcoin & personal finance. * You have previously worked in the FinTech sector. WHY YOU’LL LOVE WORKING HERE * You’ll play a central role in building the people and culture foundations of a fast-growing startup. * You’ll have ownership, autonomy, and the chance to shape how we scale our company. * You’ll work closely with a small, passionate team that values trust, transparency, and impact. * You’ll join Bitstack at a defining moment: we're scaling fast, new office, and a culture that’s evolving with purpose. INTERVIEW PROCESS 1. Intro Call (30 min) An initial conversation with our current Founder’s Associate Intern to get to know you better and share more details about the role, the team, and how we work at Bitstack. 2. Take Home Task & Task Review Call (60 min) You’ll receive a practical task to complete in your own time. Once submitted, we’ll schedule a review call to walk through your solution together and explore your thought process in more detail. 3. Behavioural Interview (60 min) A conversation with the CEO centered on your experiences, decision-making, and collaboration style. We’ll discuss real-world scenarios to understand how you navigate technical challenges, teamwork, and stakeholder interactions. 4. Offer PERKS & BENEFITS 🌎 Work from our office in Paris (Bourse) with up to 2 days remote per week 🕑 Flexible working hours 🍉 Swile meal vouchers DIVERSITY & INCLUSION We hire talented and passionate people from all kinds of backgrounds, we don’t care about your age or where you studied. If you’re excited about the role but your past experience doesn’t match every bullet point in the job description, we still encourage you to apply. What matters most is that you’re a builder at heart, you share our values, and you’re enthusiastic about our mission. #LI-TT1

Fairmat

Chez FAIRMAT, notre mission est de construire un écosystème circulaire qui préserve les matériaux avancés loin des décharges pour les remettre au cœur de la conception des produits. Nous sommes une deeptech pionnière dans le recyclage de la fibre de carbone, offrant une solution complète reposant sur des technologies disruptives et des innovations en robotique. En 4 ans seulement, nous avons déjà réalisé des exploits impressionnants :   - Développé et scalé une usine dans la région nantaise - Sécurisé plus de $73.7M de fonds auprès d’investisseurs - Ouvert notre première filiale aux USA - Conclut nos premiers contrats avec des acteurs industriels référence Nous sommes à la recherche de talents engagés pour un avenir durable, enthousiastes à l’idée de rejoindre cette aventure industrielle.  Votre rôle   En tant que Founder Associate, vous rejoignez un programme d’excellence de 6 mois conçu pour former et exposer la prochaine génération de leaders de Fairmat. Vous interviendrez au cœur des enjeux stratégiques et opérationnels les plus critiques de l’entreprise, en lien direct avec l’équipe de direction. Votre mission principale : décharger, amplifier et outiller l’équipe Catalyst sur l’ensemble des projets transverses et structurants de l’entreprise, en combinant : analyse stratégique, exécution terrain, support opérationnel à fort impact. Vous travaillerez au plus près de la prise de décision, avec un niveau élevé d’autonomie, de responsabilité et d’exposition — y compris en tant que Stagiaire. Ce poste est très exigeant et extrêmement formateur, pensé pour des profils souhaitant comprendre comment se construit la croissance moyen et long terme d’une startup deeptech, à un niveau C-Level.   Les rôles et missions du programme   Le programme est ouvert aussi bien aux profils ingénieurs qu’aux profils business. Nous recherchons des profils généralistes, polyvalents et à fort potentiel, capables d’intervenir sur des missions variées selon leur background.

Joko

At Joko, we help consumers shop smarter. Our mission is to revolutionize shopping, empowering people to find what they need, make informed decisions, and save money. Founded in Paris, Joko is a tech company and certified B Corp with over 105 talents across Paris, Barcelona, and New York (and beyond). More than 6 million users already save money every day at 10,000+ merchants with Joko. From cashback and automatic coupons to price alerts and carbon tracking, we keep expanding our products to make shopping smarter. We’re now building an AI-powered shopping assistant to help users find the best products by price, quality, and environmental impact. Having reached profitability in our core market, we’re now scaling globally, with a strong focus on the US. It’s still day 1, come build the future of shopping with us! This position is based in Paris. 🔥 THE CEO OFFICE The CEO Office is a hands-on team of high-potential generalists who lead Joko's strategic projects and, when needed, step in to reinforce teams on short to medium deployments. You'll take over a team of five Founder Associates, with room to grow as the company scales. As the leader of that team, your job is to build a team people are proud to be part of, where every Founder Associate grows quickly and contributes meaningfully to Joko’s most important priorities. 🎯 WHAT YOU WILL DO You'll be the CEO's strategic partner at a specific, rare moment in a company's life: a profitable scale-up entering its international chapter, expanding new business lines, doubling in headcount over the next 18 months, and investing heavily in AI — with a mature leadership team, a culture worth protecting, and a team that demands excellence. You'll report directly to Xavier (CEO), partner closely with co-founders Nicolas (CRO) and Alexandre (CTO), and serve as secretary of the Steering Committee, which is composed of the founders, the CMO, the COO, the VP People, and the Head of Online — putting you at the heart of every strategic decision the company makes. The Chief of Staff role is built around the CEO, and the CEO Office is in turn built around the Chief of Staff — together, the team exists to act as an extension of the CEO. The mandate is fourfold today, and you'll be the architect of all four pillars (as well as the future ones). 1. Governance. Your team and you will own the rhythm and quality of how Joko is run at the top — board meetings, executive team meetings, All Hands, and the communication cadence that ties them together. You'll play a central role as animator and alignment driver for the leadership team. 2. Proactive projects. Your team and you will lead the company-wide initiatives that matter most to the CEO and to Joko's next chapter — the kind of cross-functional, high-stakes work that doesn't naturally fit any single team. 3. Reactive missions. When a team needs short-term reinforcement, you'll deploy Founder Associates as a strike force, helping us address critical gaps without hiring in a rush. This will represent a decreasing share of the team's activity as the organization grows. 4. Culture. Like every member of the SteerCo — and like the CEO — you'll be expected to embody Joko's culture and lead by example. A word from Xavier "This is one of the most consequential hires I'll make this year. I'm looking for a real partner — someone with the rigor to challenge my thinking, the architectural mind to build durable systems, and the warmth to carry our culture as we scale. The Chief of Staff is, in many ways, an extension of me, and the right person will shape Joko's next chapter alongside Alex, Nico, and me." — Xavier Starkloff, CEO 👀 WHO WE'RE LOOKING FOR * 10+ years of experience, combining Tier 1 strategy consulting (BCG, McKinsey, Bain, or equivalent) with operating experience in a high-growth tech startup or scale-up. * Direct and substantive management experience, with a proven ability to hire and retain great talent. * Architectural thinking: You're as comfortable designing a multi-quarter operating model as you are fixing a broken process. You think in systems, not tasks. * Analytical rigor: Structured thinking, attention to detail, comfort with numbers, ability to write a board memo that holds up under CEO and investor scrutiny. * Emotional intelligence and stakeholder management: This role lives at the intersection of the CEO, the SteerCo, the Founder Associates, and every team in the company. You read people well, you build trust quickly across very different stakeholders, and you handle sensitive conversations with care. * Energy: You bring genuine drive and presence into a room. You'll be one of the cultural carriers of the company and a representative of the CEO. * AI fluency: You already use AI tools fluently in your own work, you have a point of view on how they reshape how teams operate, and you're excited to help Joko go further — the CEO Office is expected to lead by example on this front. * Efficiency: You're fluent in productivity tools, ruthless about prioritization, and known for delivering on time across complex projects with many stakeholders. You instinctively look for the highest-leverage version of any task. * Entrepreneurial mindset: You thrive in fast-moving, ambiguous environments. You take ownership without being asked, you welcome feedback, you're an insatiable learner, and you go the extra mile by default. * Languages: Fluency in English. * Location: Paris-based. Bonus: M&A, corporate development, and/or corporate finance exposure. 💎 OUR PERKS (Some of the benefits listed below are available to full-time positions only) At Joko, we believe that flexibility and trust are essential. Our work environment reflects this through: * Flexible remote : If you live in Paris, you can choose to work from our office or from home with no constraints. If you live elsewhere, we can provide access to a coworking space and a coworking budget. * Work from anywhere : Want to spend a month in Italy while working? You can work from most countries in the world for up to 3 months per year. On top of that, we offer plenty of perks: * 💸 Top-market compensation * 📈 Equity for everyone with the chance to own a piece of what you build * 🤖 Half-day each week dedicated to leveling up with AI by exploring new tools, iterating hard, and sharpening your skills * 🌴 Yearly offsite in amazing locations and budget for team-building events & monthly in-person gatherings * 💪 Contribution to your ClassPass subscription * 🍼 8-week leave paid 100% for the second parent * …and much more, check the full list here! 🤝 OUR HIRING PROCESS 1. Intro call: Quick screening with the Hiring Manager or the Talent team. 2. Step 1 – Team interview (45 min): Conversation with two Joko team members (could include the Hiring Manager, people from the team you’d join, or colleagues from other teams). 3. Step 2 – Role-specific assessments * For non-engineering roles: A take-home case study followed by a 45-min interview. We assess both your output and how you think in real time. The exercise will be relevant to your role (e.g. analysis, strategy, or process design). * For engineering roles: A 90-min live technical interview on CoderPad covering code understanding, review, system design, and product thinking (with AI serving as a collaboration tool). 4. Step 3 – Leadership interview (45 min): Conversation with a SteerCo member and a Founder. 5. References: Up to 3 calls with former colleagues or managers. ☕ You may also be invited for coffee with team members to get a feel for our culture.