Tree-Nation is the world's largest reforestation platform, connecting citizens and companies with verified planting projects across the globe. Since 2006, over 800,000 users and 30,000+ companies have planted more than 45 million trees through our platform, across 40+ active reforestation projects worldwide.
We combine technology and environmental impact to make reforestation simple, transparent, and scalable. Our goal is to plant 1 trillion trees by 2050 — and we are building the platform, the automation, and the systems to get there.
Our team spans many nationalities, backgrounds, and disciplines. What we share is a mindset: we take ownership because we care about what we're building, we don't back down from hard problems, and we trust each other to lead, make decisions, and ask for help when needed.
We are investing heavily in automation and AI to scale our impact. The company provides access to the latest LLMs, and we strongly encourage everyone to innovate.
We're based in Barcelona and work primarily from the office, because the energy of working side by side matters to us.
We are looking for a senior product builder to join Tree-Nation's tech team.
This is not a classic PM role. There is no CPO layer above you, no product team around you, and no process handed to you. You will work directly with the CEO and the engineering team to turn business vision into clear, coherent, build-ready product features — and you will own that function end to end.
The profile we're looking for sits at the intersection of three things: product ownership, technical depth, and business judgment. All three are non-negotiable. You need to think like a product owner — flows, specs, UX, priorities, quality. You need to think like an engineer — data models, service boundaries, backend logic, implementation trade-offs. And you need to think like a businessperson — commercial impact, revenue logic, what's worth building and what isn't.
Tree-Nation is a complex platform: planting logic, sponsors, users, forests, credits, billing, reporting, integrations, automation, operational tools, and environmental data all need clean domain separation, strong data models, and well-defined interactions. Your job is to bring clarity to that complexity — from first principles, not from templates.
This role is for someone who has operated in small, unstructured environments and thrived.
We are looking for a rare generalist: part product owner, part systems thinker, part technical generalist, part creator — with strong product judgment, business sense, UX/design taste, and the ability to turn complex ideas into simple, scalable product solutions. Someone able to start from a blank page, move without being told, and take full ownership of the product agenda without anyone managing it for them.
Turn business vision into build-ready product features, flows, specifications, and roadmap decisions
Apply business judgment to every product decision — understand the commercial impact, the revenue logic, and the tradeoffs between speed, quality, and scope
Design product logic from first principles: entities, data models, states, permissions, rules, edge cases, service boundaries, and acceptance criteria
Work directly with engineers as a technical peer — not as a translator or ticket manager, but as someone who understands the system deeply enough to challenge, contribute, and decide
Validate finished work deeply: product QA, edge cases, data logic, user experience, reporting, billing, credits, sponsor logic, and operational impact
Identify weak product logic early, especially unclear ownership, poor domain separation, fragile data structures, unnecessary exceptions, or scalability issues
Required
10+ years of experience in tech, product, systems, engineering, technical product management, product ownership, or a hybrid product/engineering role
Exceptional system-design ability: databases, APIs, backend logic, entities, relationships, permissions, states, business rules, service boundaries, data ownership, and implementation trade-offs
Strong database and data-modeling skills — you naturally think in tables, entities, states, relationships, rules, constraints, ownership, interfaces, and consequences
Experience working in small teams in a startup or early-stage environment — you've had to wear multiple hats and operate without infrastructure
Proven ability to work from a blank page — you've designed systems, flows, and product logic from scratch, not just improved existing ones
Ability to read and understand code well enough to follow product logic, discuss implementation with engineers, and detect technical or architectural problems
Ability to write clear, technically coherent product specifications that engineering can build from
Experience with complex platforms involving billing, credits, integrations, permissions, reporting, automation, operational tools, SaaS, marketplaces, or usage-based systems
Strong product judgment, business sense, UX/design sensitivity, autonomy, and attention to quality
Based in Barcelona and comfortable working on-site
Strong Advantage
Former engineering experience
Computer science, software engineering, systems design, database, or technical architecture background
PHP/MySQL experience or similar backend environment
Ability to code or prototype when needed
Experience with microservice-oriented systems, complex internal tools, subscription, credit-based, billing, marketplace, SaaS, or usage-based business models
Mindset
High ownership — you take initiative, but you also know when to listen first. Tree-Nation does things differently, and the best people here understand context before trying to change it
Open and direct communicator — we give each other honest feedback because we want everyone to grow, and we expect the same openness in return
Systems thinker — you look for the root cause, not the quick fix. You build processes that work at scale, not band-aids that break at 50 accounts
Self-driven and curious — you're motivated by the impact of your work, and you actively seek out better ways to do things
Mission-aligned — reforestation isn't a marketing line for you. It's the reason you're reading this
Compensation & Contract
Competitive base salary aligned with market and experience
Permanent contract from day one
Benefits
Flexible Remuneration Card covering meals and transport
Wellhub (former Gympass) membership
Regular team-building events — dinners, offsites, and the occasional non-tree-related adventure
Flexible start time between 8:00 and 10:00 and short Fridays
The Tree-Nation Difference
A sustainability-designed office in Barcelona built to reflect the mission you're working toward
Your lifetime carbon emissions are offset through monthly tree planting from the day you join
A free Tree-Nation Pledge subscription — so you can plant and gift trees as a user of the platform you're helping build
A small, high-trust team with flat structure where your work has a visible impact from day one
A place where failure is part of the process — if nothing is failing, we're not pushing hard enough
If you've read this far and something clicked — the mission, the way we work, the problems we're solving — we want to hear from you.
We don't hire based on pedigree. We hire based on how you think, what you've built, and whether you'll make the team sharper.
We're looking for people who make the team better. Come prove it.