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

"The engagement allowed us to step back and reflect on our key challenges [...] Without them, I would never have managed to drive such rapid change within the group."

Elise Applanat

Co-founder at MerciYanis

"When I changed roles, I had to relearn everything. The support helped me regain confidence [...] We went from a demand-driven product to a vision-driven product."

Charles-Henri Poirot

CPO at Sahar

"The support enabled me to structure the Product function as a true strategic lever [...] and lay the foundations for a scalable organization to support our diversification."

Guillaume Boiret

CEO of PhantomBuster

"The audit enabled 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."

Gregory Hachin

CEO of Ector

"Stellar's intervention transformed a frozen project into a clear, actionable plan [...] Their ability to challenge without imposing, to coach without dominating, made all the difference."

Victor Ruelle

Head of Product at Joko

“Having an experienced mentor who listens and takes concrete action enabled me to take a step back. The exchanges helped me gain confidence and gave me the tools to face the future with serenity."

Jean-Rémi de Maistre

CEO of Jus Mundi

"The Stellar audit enabled us to make the key issues objective, formalize our intuitions, and above all, launch the priority initiatives immediately, without delay.”

Pauline Renoux

Head of Product at Stanley Robotics

"Stellar's CPOs are not just facilitators: they bring real convictions and on-the-ground expertise. Pragmatic and effective support."

Nate Lowe

CTO at Aldebaran

"In three months, we found our PMF, signed our first structuring contracts and attracted new investors. Stellar's support had a decisive impact at a key moment for the company. I'd recommend it to any founder in the early-stage phase."

Baptiste Le Bihan

CEO of Linc

"Matthieu, with his experience as founder and CPO, immediately challenged us. Thanks to his approach, we avoided looking for the 'five-legged sheep'. Stellar's peer assessment and benchmarks were decisive."

Maxime Barbier

CEO of Timeleft

"Stellar's ability to challenge my intuitions with concrete data saved me an incredible amount of time and avoided costly recruitment mistakes."

Joan Alfonso

Product Leader at Smetz

"Mentoring with Stellar helped us smooth the relationship between CEO, Product and Tech, make decisions we'd been putting off for months, and become more efficient in customer onboarding and delivery."

Florian Bouron

CEO at Jint

“The bulk of the value of the engagement came from the quality of the Stellar team: pragmatic, experienced, and able to dive deep into issues rather than just skim the surface."

Pierre-Louis Giros

CPO at Allshare

"What I particularly appreciated was Stellar's ability to adapt their recommendations to our level of product maturity.Their plan was fully adapted, yet ambitious. That's all it took to get the CODIR and all the teams on board."

Pierre Touton

CEO of Bow Medical

"The audit enabled us to catch the wave at the right time. Before, I used to pull my teams, now I push them: they have adopted the vocabulary, the priorities and are challenging each other. Stellar was able to transform our findings into a concrete action plan"

Simon Baldeyrou

CEO at Phenix

"Stellar's audit was a real wake-up call. This support enabled us to move from a logic of frugality to a dynamic of investment, essential to relaunching our growth and preparing for international expansion."

Arthur Ménard

Head of Product at Pony

"Mentoring with Stellar has been a real gas pedal. Having an external, experienced and benevolent viewpoint changes everything when you're in the middle of a Scale phase."

Laure Pichereau

CEO of Siview

"Working with Stellar was a real catalyst. In just a few weeks I gained in serenity, posture and, above all, impact. It's simple: without it, we'd never have been ready to Scaler 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."

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 at Okeiro

"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

"Stellar's solutions were very relevant. I particularly appreciated the efficiency of the intervention; in less than 2 weeks, I received a clear strategy to help my startup accelerate on the product and the business!"

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

"For the short amount of time we spend with our teams, the efficiency of the process is beyond reproach. 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 revamped our strategy and optimized our development processes. We saved a huge amount of time and avoided many unnecessary expenses."

Romain Charié

CEO at Revbell

“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.”

Damien Marc

CEO at Keyprod

“Thanks to Stellar’s support, we transformed our Product organization. A hands-on, proven approach, far from the PowerPoint theories of traditional consulting.”

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.”