Senior Product Builder

Tree-Nation is the worlds largest reforestation platform connecting citizens and companies with verified planting projects across the globe. Since 2006 over 800000 users and 30000 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 were building we dont 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.

Were 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-Nations tech team.

This is not a classic PM role and not a separate product-team position. The role sits inside the tech team and works directly with the CEO/CPO and engineers to turn business vision into clear coherent build-ready product features.

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.

This is a product role but the method is system-level thinking. Your output is product features flows specifications roadmap decisions UX improvements and shipped product quality. Your strength is designing product from a deep understanding of data business rules service boundaries technical constraints and operational consequences.

You should be able to read code reason about databases understand backend logic and discuss technical trade-offs fluently with engineers. Former engineering experience is a major advantage but the real requirement is engineering-level thinking and exceptional system-design ability.

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.

• Turn business vision into build-ready product features flows specifications and roadmap decisions
• Design product logic from first principles: entities data models states permissions rules edge cases service boundaries and acceptance criteria
• Work directly with engineers to clarify decisions remove ambiguity and ensure what gets built matches what was intended
• 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
• 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 youre motivated by the impact of your work and you actively seek out better ways to do things
• Mission-aligned reforestation isnt a marketing line for you. Its the reason youre 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 youre 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 youre 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 were not pushing hard enough

If youve read this far and something clicked the mission the way we work the problems were solving we want to hear from you.

We dont hire based on pedigree. We hire based on how you think what youve built and whether youll make the team sharper.

Were looking for people who make the team better. Come prove it.