Engineer-Owned Product
Collapse the product/engineering divide by giving ownership to whoever is closest to the problem
- Difficulty
- Advanced
- Time to result
- ~ongoing to results
- Steps
- 3
- Confidence
- 90%
Mercado Libre runs with a deliberately tiny PM-to-engineer ratio (roughly 5% vs 10-30% at peer companies) because they refuse to assign product ownership by title. Whoever can hold the full context — technical possibility, business need, and user behavior — in a single mind owns the vision. In practice that is usually the engineering leader or tech lead.
Origin
Sebastian Barrios' operating model as head of product and engineering at Mercado Libre; contrasts with the industry-standard split between PM and engineering orgs.
Core principles
- 01Ownership follows capability and closeness to the problem, not job title
- 02One mind holding the whole context ships products users love more reliably than two coordinating roles
- 03Hire for a strong engineering/technical bias first, then discover product inclination once inside
- 04Being unable to answer detail questions in a meeting because 'I need to check with another person' is disqualifying
How to run it
- 1
Keep the PM layer deliberately thin
Maintain a very low ratio of product-titled people to engineers — Mercado Libre runs under ~5% (fewer than 1,000 PMs across ~18,000 engineers) versus 10-30% elsewhere.
Pro tip Frame PMs as a small supporting organization, not the default owners of every feature.
Watch out This works only when leadership itself is deeply technical and product-literate; a non-technical top layer cannot sustain it.
- 2
Assign ownership to whoever is closest to the problem
Give the vision to the person who can simultaneously understand what is technically possible, what the business needs, and what users are doing — usually the tech lead or engineering leader.
Pro tip Ask who can hold the whole context in one head; that person owns it.
- 3
Hire for technical depth, test for product instinct
Bias the interview toward engineering skill and technical depth while still probing for product sense. Reject candidates who deflect detail questions to other people.
Pro tip Once inside, let the environment reveal whether someone leans product or prefers pure engineering.
Watch out Do not tolerate leaders who can't speak to the technical details of their own work.
In the wild
Barrios states fewer than 1,000 people carry the PM title across 18,000+ engineers, where other companies would staff 10-30% or more. For Mercado Libre the product owner in the majority of cases is the engineering leader or tech lead.
→ Mercado Libre became the most valuable company in Latin America (>$100B) while running one of the largest engineering teams on the planet with a fraction of the usual PM overhead.
Common mistakes
Starting with 'no PMs ever' then reversing
Many companies declare engineers will lead product forever, then engineers tire of the spec-writing and meeting load and revert to a standard PM org. Mercado Libre sustains it only because leadership is top-down technical and product-obsessed, not because they banned PMs on principle.
Assigning ownership by title instead of capability
Defaulting product ownership to whoever has the PM title, rather than whoever is closest to the problem and holds the full context, separates decision-making from the people who understand what is technically and user-wise possible.
Is it for you?
Best for
Technically-led companies whose leadership goes deep on product and user experience and can recruit top-tier engineering talent
Not ideal for
Organizations with non-technical leadership or a weak engineering talent pool, where a dedicated PM layer provides context engineers lack
From the transcript
“We we we're not going to determine who's going to own the product just based on the title. is going to be based on who's…”
“So I think it's less than 1,000. I think that would make uh like 5% uh where in other companies maybe you have 10 20…”
“There's not a lot of tolerance for being in a meeting and getting asked the questions like well I need to check with this person…”
From the episode
How Mercado Libre built Latin America's most valuable company: 18k engineers, 30k deploys a day, and their own fleet of planes
Sebastian Barrios