Founding Fullstack Engineer (Product Focus)
full-time•Barcelona, Lisbon, Capon Bridge, Bucharest
About this role
<p><span style="font-size:11pt;font-family:Arial, sans-serif;color:rgb(0, 0, 0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap;"><strong>Product:</strong></span><span style="font-size:11pt;font-family:Arial, sans-serif;color:rgb(0, 0, 0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap;"> AI-Native Real Estate Intelligence Platform<br></span><span style="font-size:11pt;font-family:Arial, sans-serif;color:rgb(0, 0, 0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap;"><strong>Stage:</strong></span><span style="font-size:11pt;font-family:Arial, sans-serif;color:rgb(0, 0, 0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap;"> Seed / Idea Stage</span><br><span style="font-size:11pt;font-family:Arial, sans-serif;color:rgb(0, 0, 0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap;"><strong>Ukrainian is a plus</strong><br></span><span style="font-size:11pt;font-family:Arial, sans-serif;color:rgb(0, 0, 0);background-color:transparent;font-weight:700;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap;"><strong>Location:</strong></span><span style="font-size:11pt;font-family:Arial, sans-serif;color:rgb(0, 0, 0);background-color:transparent;font-weight:400;font-style:normal;font-variant:normal;text-decoration:none;vertical-align:baseline;white-space:pre-wrap;"> Remote (Europe)</span></p><p>Our client is an early-stage team building a product for the real estate market.</p><p>Their immediate goal is to quickly build and validate a working product — something users can see, use, and give feedback on.</p><p>This is a founding, hands-on engineering role.</p><p>The team is not looking for an Architect, a Manager, or a specialized AI/ML engineer.</p><p>They are looking for a strong product-minded engineer who enjoys building from scratch in conditions of uncertainty.</p><h2>🚀 What you’ll do</h2><p>Build a product from 0 → 1 together with the founders</p><p>Own features end-to-end: backend, frontend, integrations, basic infrastructure</p><p>Make pragmatic technical decisions without a fixed stack or strict requirements</p><p>Iterate fast: ship, get feedback, improve</p><p>Contribute to product shaping, not just task execution</p><h2>🧠 What matters most</h2><p>Strong experience as a Senior Fullstack / Product Engineer</p><p>Previous experience building MVPs or early-stage products</p><p>Comfort working without a predefined tech stack</p><p>Ability to balance speed and quality</p><p>Hands-on mindset — this is not a management role</p><p>This role is about shipping a real product, not designing perfect architecture upfront.</p><h2>🧩 Tech & stack</h2><p>There is no fixed stack yet.</p><p>The engineer will help choose tools pragmatically based on product needs.</p><p>Typical areas of responsibility:</p><p>Backend APIs and business logic</p><p>Frontend (React or similar frameworks)</p><p>Databases and third-party integrations</p><p>Basic cloud setup and deployments</p><p>Experience with data-heavy products, analytics, or AI is a nice to have, but not the focus at this stage.</p><h2>🌱 Why this role</h2><p>True founding engineer ownership</p><p>Direct collaboration with the founders</p><p>High autonomy and fast decision-making</p><p>Opportunity to shape both the product and the engineering foundations</p><h2>📩 How to apply</h2><p>The team would love to see:</p><p>Products or MVPs built from scratch</p><p>Examples of end-to-end ownership</p><p>Startup or early-stage experience (especially in ambiguous environments)</p><h2>🔴 This role is not for:</h2><p>Pure frontend engineers</p><p>Data / ML / AI specialists looking for model-centric work</p><p>Engineers who prefer fully defined requirements and fixed stacks</p>
What you'll do
- The engineer will be responsible for building a product from inception to launch alongside the founders, owning features end-to-end across the backend, frontend, integrations, and basic infrastructure. This role requires making pragmatic technical decisions quickly and contributing significantly to product shaping, not just task execution.
About OnHires
Global recruitment & staffing for fast-growing companies
We are a global recruitment agency that helps businesses scale by hiring talented tech & creative specialists.
Our Mission
To connect great companies with even greater talent.
Our Vision
To be the leading partner that clients and candidates always choose to connect with.
Our Approach
We are goals driven team, where culture is more important than formal processes.
We have built a work environment that nurtures growth and true teamwork. There is nothing as satisfying as learning and celebrating successes together!
Once you get to know us, you’ll know where this drive and energy come from.
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Frequently Asked Questions
What does a Founding Fullstack Engineer (Product Focus) do at OnHires?
As a Founding Fullstack Engineer (Product Focus) at OnHires, you will: the engineer will be responsible for building a product from inception to launch alongside the founders, owning features end-to-end across the backend, frontend, integrations, and basic infrastructure. This role requires making pragmatic technical decisions quickly and contributing significantly to product shaping, not just task execution..
Is the Founding Fullstack Engineer (Product Focus) position at OnHires remote?
The Founding Fullstack Engineer (Product Focus) position at OnHires is based in Barcelona, Catalonia, Spain and Lisbon, Portugal. Contact the company through Clera for specific work arrangement details.
How do I apply for the Founding Fullstack Engineer (Product Focus) position at OnHires?
You can apply for the Founding Fullstack Engineer (Product Focus) position at OnHires directly through Clera. Click the "Apply Now" button above to start your application. Clera's AI-powered platform will help match your profile with this opportunity and guide you through the application process.