Part-time Leadership

Part-time leadership

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

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

Talk to our team

What you walk away with.

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

The problem it solves

When Part-time Leadership is the right move

Four situations where this is the right call.

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

You're too early for a full-time hire or can't justify the cost. But you need senior product and tech leadership now, not in six months.

Your current product or tech leader is stretched thin.

Your Head of Product is execution-strong but strategy-weak. Your CTO is technical but doesn't manage well. You need someone senior to stabilize while you figure out the long-term plan.

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

Delivery has collapsed. The roadmap is a mess. Teams have lost confidence. You need someone to step in, restore order, and rebuild momentum fast.

You're preparing for a major transition.

Post-fundraise scale, pivot, international expansion. These moments call for stronger leadership. Part-time gives you that without committing to a permanent hire.

What changes

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

In the first month

Product and Engineering stabilized. Clear priorities. Teams regain confidence.

In the first 3 months

Velocity improves measurably. Strategic decisions made with conviction. Hiring and org design on track.

After 6 months

Product and Engineering operating autonomously. Permanent leadership in place. Clean transition out.

Talk to our team

What you get

Not a consultant. Not an advisor. A senior CPO or CTO embedded in your team.

We take ownership immediately.

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

We run the job like a full-time CPO or CTO would.

Strategy, roadmap prioritization, delivery oversight
Hiring, org design, and process optimization
Board and investor communication on Product and Tech

We build the team that works without us.

Systems and processes built to last after we leave
Support hiring or promoting your permanent CPO or CTO
Clean handoff when you're ready

What makes it different

Why this works

Most interim leaders advise. We take the wheel. Every engagement is run by a CPO or CTO who's owned this role before.

We do the job. We don't just advise on it.

We run your Product and Engineering teams. We make decisions. We own outcomes. This is interim leadership, not consulting.

Senior judgment without the full-time cost.

A full-time CPO costs €150k to €250k 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 make you autonomous.

We don't create dependency. We build systems, hire the right people, and prepare your org to operate without us. Our goal is to work ourselves out of a job.

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 at 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 at 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 at 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 at 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 at 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 at 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

Directeur Général 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 at 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 at 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 move from project mode to product mode! An essential transformation to achieve our post-LBO growth objectives."

Pierrick Arnal

CEO at Okeiro

"You might expect a surface-level audit, yet the action and recruitment plan provided by Stellar is a real Game-Changer for my teams, all the more so in the context of our Series A Closing. I recruited our new CTO in the process, saving 2 months in his Onboarding!"

Elliot Boucher

CEO at 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 exchanges, great clarity in the deliverables, and a real jolt for us. If I had to rate the assignment, I'd give it a big 5/5. You unlocked important things, way beyond the product."

Antoine Lafont

CEO at Diogen

"The initial exchange with Stellar was an electroshock: the questions asked revealed a huge gap between their daily lives and Product standards, which triggered an immediate awareness."

Emile Karam

Cofounder & 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

Cofondateur & 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 the best practices adapted to our maturity."

Mike Cuingnet

CEO at Tennders

"There was a before and an after to Stellar. They compensated for the absence of a Head of Product and the lack of seniority in our team in just a few days a month. They revolutionized our strategy and overhauled our processes from top to bottom. In 6 months, my employees are more engaged than ever, my customers are converting on our new model and our users are seeing new features released every month."

Ethan Frajdenrajch

Co-fondateur 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 function and we were operating blindly. They helped me raise my standards and prepare my team for the upcoming growth stages.”

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 at Jaji

“The engagement is effective and pragmatic. They get straight to the point and involved our teams over a very short period. The Stellar team saved us two months.”