Part-Time Leadership

Part-time leadership

Senior product leadership when you need it, without the need to hire full-time.

We step in as your part-time CPO or CTO, take charge of Product and Engineering, and get things moving from day one.

Talk to our team

What you take away from it.

A product and engineering team with a clear direction
Delivery is back on track
A path to permanent leadership when you're ready

The problem it solves

When Part-Time Leadership Is the Right Choice

Four situations where this is the right decision.

You don't have a CPO or CTO and can't hire one yet.

You're not quite ready to hire a full-time employee yet, or you can't justify the cost. But you need senior product and technical leadership now, not in six months.

Your current product or technology leader is spread too thin.

Your Head of Product is strong on execution but weak on strategy. Your CTO is technically skilled but lacks management skills. You need a senior leader to stabilize the situation while you work out the long-term plan.

You're in a crisis and need someone to take charge.

Delivery has broken down. The roadmap is in disarray. Teams have lost confidence. You need someone to step in, restore order, and quickly rebuild momentum.

You're preparing for a major change.

Post-fundraising, scaling up, pivoting, and international expansion. These are the moments that call for stronger leadership. A part-time role gives you that without the commitment of a full-time hire.

What's changing

We come in to solve a problem. We leave with it fixed for good.

In the first month

Product and engineering teams are now on solid footing. Priorities are clear. Teams are regaining confidence.

In the first 3 months

Velocity improves significantly. Strategic decisions are made with confidence. Hiring and organizational design are on track.

After 6 months

Product and Engineering operate independently. Permanent leadership is in place. A smooth transition has been completed.

Talk to our team

What you get

Not a consultant. Not an advisor. A senior CPO or CTO who works closely with your team.

We take ownership right away.

Direct management of your Product and Engineering teams
Clear priorities established within the first two weeks
Delivery schedule restored

We handle the job just as a full-time CPO or CTO would.

Strategy, roadmap prioritization, delivery oversight
Hiring, organizational design, and process optimization
Board and investor communication regarding Product and Technology

We build a team that can function without us.

Systems and processes designed to endure long after we're gone
Support for hiring or promoting your full-time CPO or CTO
A smooth transition when you're ready

What makes it different

Why this works

Most interim leaders offer advice. We take the reins. Every assignment is led by a CPO or CTO who has held this role before.

We get the job done. We don't just give advice.

We lead your Product and Engineering teams. We make decisions. We take ownership of the results. This is interim leadership, not consulting.

High-quality results without the high cost.

A full-time CPO costs €150,000 to €250,000 per year and takes 6 to 12 months to hire. We give you immediate access to the same level of leadership at a fraction of the cost.

Built to empower you.

We don't create dependencies. We build systems, hire the right people, and prepare your organization to operate without us. Our goal is to make ourselves obsolete.

What our clients actually say. No fluff. 

Charlyne Graveline

Head of Product at Geolid

“This collaboration allowed us to take a step back and reflect on our key challenges, and to better understand where our main levers for impact lay. We were able to develop a clear plan, realign our priorities, and quickly implement transformative decisions. Without them, I would never have been able to drive such rapid change within the group.”

Elise Applanat

Co-founder at MerciYanis

"When I took on a new role, I had to start from scratch. Their support helped me regain my confidence, define our product vision, and get the whole team on the same page. We shifted from a demand-driven product to a vision-driven product. Without them, I would never have been able to implement such rapid changes within the team."

Charles-Henri Poirot

CPO at Sahar

“Their support enabled me to position the Product function as a true strategic asset. I was able to clarify the vision, secure the executive committee’s buy-in, and lay the groundwork for a scalable organization to support our diversification. Without them, I would never have been able to drive such rapid change within the group.”

Guillaume Boiret

CEO of PhantomBuster

“The audit allowed me to quickly gain clarity and make the right decisions at the right time. The impact was immediate: greater clarity, a better pace, and renewed collaboration. Without them, I would never have been able to drive such rapid change within the group.”

Gregory Hachin

CEO of Ector

“Stellar’s intervention transformed a stalled project into a clear, actionable plan aligned with our strategy. Their ability to challenge without imposing, to coach without dominating, made all the difference. Without them, I wouldn’t have been able to get the team moving so quickly.”

Victor Ruelle

Head of Product at Joko

“Having an experienced mentor who listens and takes concrete action allowed me to step back, organize my hiring process, and lay a solid foundation for our Product team. These discussions helped me gain confidence and gave me the tools to face the future with confidence. Without them, I would never have been able to get things moving so quickly within the Group.”

Jean-Rémi de Maistre

CEO of Jus Mundi

“We were all convinced that we needed to restructure our Product organization, but we lacked the framework to take action. The Stellar audit enabled us to identify the key issues objectively, formalize our insights, and, above all, launch the priority initiatives immediately, without delay.”

Pauline Renoux

Head of Product at Stanley Robotics

"I didn't know where to start when it came to redefining our product strategy. In less than two months, the Stellar method enabled us to engage all teams, align our vision, and lay a solid foundation. Stellar's CPOs aren't just facilitators—they bring genuine conviction and hands-on expertise. Their support is both pragmatic and effective."

Nate Lowe

CTO at Aldebaran

"Mentoring with Stellar was a real wake-up call. I clarified my role, managed my team more effectively, and made decisions I had been putting off for too long. In three months, we found our product-market fit, signed our first structuring contracts, and attracted new investors. Stellar's support had a decisive impact at a critical moment for the company. I would recommend it to any founder in the early stages."

Baptiste Le Bihan

CEO of Linc

"We knew our product was becoming a risk for the company, but we lacked both the experience and the clarity needed to restructure the team and recruit the right product lead. Matthieu, with his experience as a founder and CPO, immediately challenged us to clarify our needs and objectives. Thanks to his approach, we avoided looking for a 'one-in-a-million' candidate, targeted the right people, and established an efficient recruitment process. Stellar's peer assessment and benchmarks were decisive."

Maxime Barbier

CEO of Timeleft

"What I really appreciated was Stellar's ability to challenge my assumptions with concrete data: salary benchmarks, skills matrices, and detailed profile analysis. It saved me an incredible amount of time and helped me avoid costly hiring mistakes."

Joan Alfonso

Product Leader at Smetz

"Mentoring with Stellar helped us clarify our priorities, improve communication between the CEO, Product, and Tech teams, and lay a solid foundation to support our growth. It helped us make decisions we had been putting off for months and become more efficient in customer onboarding and delivery. Without them, I never would have been able to make these changes so quickly."

Florian Bouron

CEO of Mozzaik365

“The bulk of the value of the engagement came from the quality of the Stellar team: pragmatic, experienced, and able to delve deeply into issues rather than just skim the surface. The audit enabled us to restructure our technical organization, recruit a new leader, and finally define a credible plan to address technical debt and improve velocity. Without them, we would have continued to fall behind, put our growth at risk, and I would never have managed to drive such rapid change within the group.”

Pierre-Louis Giros

CPO at Allshare

"What I particularly appreciated was Stellar's ability to tailor their recommendations to our product's current stage of development. We were starting from scratch and were concerned that their recommendations might be out of touch with our reality, or that the investment plan would be too burdensome. On the contrary, their plan was fully tailored to our needs, yet still ambitious. That was all it took to get the executive committee and all the teams on board."

Pierre Touton

CEO of Bow Medical

"The audit allowed us to seize the opportunity at just the right moment. Before, I used to have to pull my teams along; now I push them: they’ve adopted the terminology and priorities and are challenging one another. Stellar was able to turn our findings into a concrete action plan, combining operational benchmarking with practical experience on the ground. Without them, I never would have been able to get the Group moving so quickly."

Simon Baldeyrou

CEO at Phenix

"Stellar's audit was a real wake-up call, enabling us to clarify our vision, hire a CPO in record time, and establish a governance structure that finally streamlined our decision-making. This support allowed us to shift from a mindset of frugality to one of investment, which was essential for reigniting our growth and preparing for international expansion."

Arthur Ménard

Head of Product at Pony

"Mentoring with Stellar has been a real game-changer. It allowed me to step back, structure my transition into the role of Head of Product, and resolve key challenges such as retention and collaboration with the tech team. Having an external, experienced, and supportive perspective makes all the difference when you're in the midst of a scaling phase."

Laure Pichereau

CEO of Siview

"Working with Stellar was a real game-changer. In just a few weeks, we clarified our roadmap, built out the product and marketing team, and implemented decisions I’d been putting off for months. I gained a sense of calm, confidence, and, above all, impact. It’s simple: without it, we’d never have been ready to scale internationally."

Julien Coulet

CEO of Tenacy

"The Stellar method clarified our product direction and enabled us to realign and better structure our execution. The support we received saved us months in terms of product structuring and team mobilization—a real boost in achieving our growth objectives."

Iscliff Lebée

COO at Dayuse

"Stellar succeeded in mobilizing the entire COMEX and teams to transition from project mode to product mode! This was an essential transformation for achieving our post-LBO growth objectives."

Pierrick Arnal

CEO of Predict4health

"You might expect a superficial audit, but the action and recruitment plan provided by Stellar is a real game-changer for my teams, especially given that we’re closing our Series A round. I was able to recruit our new CTO through this process, cutting his onboarding time by two months!"

Elliot Boucher

CEO of Edusign

"It was really interesting to get an outside perspective. Stellar's solutions were very relevant. We clearly wouldn't have thought of them on our own, and the process was clearly explained to the team. I particularly appreciated how efficient the process was; in less than two weeks, I received a clear strategy to help my startup accelerate its product and business development!"

Thomas Levallois

CFO at Araïko

"We gave you demanding specifications, and you met them to the letter. Great communication, clear deliverables, and a real eye-opener for us. If I had to rate the project, I’d give it a solid 5 out of 5. You helped us uncover key insights that went far beyond the product itself."

Antoine Lafont

CEO of Diogen

"The initial exchange with Stellar was a wake-up call: the questions asked revealed a huge gap between their daily lives and product standards, which immediately brought the issue to light."

Emile Karam

Co-founder & CPO at Garantme

"Given the limited time we spend with our teams, the efficiency of the process is second to none. The clear, actionable deliverables allow us to ask the right questions and spark constructive discussions. It’s exactly what we expect from an audit, but with unprecedented speed."

Guillaume Cruz

Co-founder & CPO at Zeliq

"What I appreciated most was the responsiveness and attentiveness of the Stellar team. Thanks to them, we were able to effectively prioritize our product decisions and quickly adopt best practices tailored to our level of maturity."

Mike Cuingnet

CEO of Tennders

"Stellar marked a turning point for us. In just a few days a month, they made up for the absence of a Head of Product and the lack of senior leadership on our team. They transformed our strategy and completely overhauled our processes. In six months, my employees are more engaged than ever, my customers are converting under our new model, and our users are seeing new features released every month."

Ethan Frajdenrajch

Co-founder at OKS Media

"Stellar's coaching was a game-changer for OKS Media. With the help of our Stellar CPO, we completely overhauled our strategy and optimized our development processes. The solutions provided were concrete and could be implemented quickly. We saved a tremendous amount of time and avoided many unnecessary expenses."

Romain

CEO of N&C

“It’s very simple: before Stellar, I didn’t have a Product team, and we were operating in the dark. They helped me raise my standards and prepare my team for the next stages of growth.”

Quentin Sauvée

CEO of Jaji

“Their approach is effective and pragmatic. They get right to the point and engaged our teams in a very short time. The Stellar team saved us two months.”