Fledge

We are a boutique Talent search firm connecting exceptional Talent with the most innovative companies in the AI and software development industries across EMEA.

Our clients are among companies with innovative products that have a positive impact on our societies, and we present them with a solution model between fine consulting and flexible recruitment process outsourcing :

Fractional Talent Acquisition Advisory
Recruitment operation tools
On-demand Talent sourcing expertise

Job Summary

We are searching for a Product Engineer to join a climate-tech startup based in Barcelona, developing advanced AI systems to accelerate global decarbonization. The company blends deep scientific research, AI engineering, and operational expertise to help industrial partners reduce emissions at scale. Their platform processes complex data in real time, providing actionable insights that drive measurable environmental outcomes.

In this role, you’ll build and own end-to-end product features for AI-powered applications used by energy, mobility, and industrial teams worldwide. You’ll work at the intersection of product, engineering, and environmental science—designing intuitive tools, building scalable systems, and solving technical challenges tied to sustainability, high-frequency data, and model integration. The team values autonomy, fast iteration, and a strong sense of mission.

In this role, you will

Lead the development of full-stack solutions, from designing intuitive user interfaces to crafting robust backend systems.
Collaborate with cross-functional teams—AI researchers, climate scientists, and data engineers—to integrate models into practical, user-centric tools.
Architect scalable, maintainable systems capable of handling high-volume environmental and industrial data.
Experiment with and implement modern frameworks, APIs, and cloud infrastructure.
Mentor junior developers, helping cultivate a culture of growth, clarity, and high technical standards.
Automate and optimize workflows to deliver faster, more reliable solutions for internal teams and external users.

Required Skills and Qualifications

Strong theoretical and practical knowledge of computer science foundations.
Strong knowledge of core web technologies like React, Next.js, Tailwind, Typescript. Familiarity with Python and AWS is a plus.
Passion for both AI/LLMs and user experience and design.
A commitment to collaborative teamwork, continuous growth, and constructive feedback-seeking.
Experience working at early-stage startups is a plus.

Preferred Skills and Qualifications

Great communicator: You can help clients understand the value we bring and help our team better understand our clients
Resilience: You can ride the ups and downs of the job and stay balanced through it all.
Results-based: You own the outcome.
Team player: You put the team before you.
Organized: You can keep track of your workload and ensure critical things are not missed.

In return, they offer

Top of the market salary
Equity plan
Relocation support
Visa administration

🌈 Diversity, Equity, Inclusion and Belonging

We are committed to enabling everyone to feel included and valued and trust our partners to do the same. Both the company and its culture are strongest when composed of diverse experiences and backgrounds.

All qualified applicants will receive consideration for employment without regard to age, color, family, gender identity, marital status, national origin, physical or mental disability, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable laws.

ℹ️ Important

If you have a medical condition or an individual need for an adjustment to our process, and you believe this may affect your ability to be at your best — please let us know so we can talk about how we can best support you and make any adjustments that may be needed.

In case of any doubts or questions, please contact Fledge – [email protected]

Product Engineer - Seed stage - Climate Tech

Job Description