---
title: 'AI Engineer at LABHOUSE'
canonical: 'https://feeny.ai/job/ai-engineer-labhouse-barcelona-7r48da6eb3qx'
type: 'job'
last_seen: '2026-09-08'
---

# AI Engineer at LABHOUSE 

- **Company:** LABHOUSE 
- **Location:** Barcelona, Spain
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-06-05
- **Last confirmed live:** 2026-09-08
- **Apply:** https://jobs.ashbyhq.com/labhouse/8e17d45f-415c-4e18-9b07-44b0261e3765

## Job description

Labhouse is a Barcelona-based startup studio building AI-powered mobile apps used by hundreds of thousands of people worldwide. Our products — including Invoice Fly and Summary AI — are designed to make everyday tasks faster, smarter, and simpler through a subscription model that puts the user first.

We were founded by Andrés Bou and Horacio Martos, the duo behind SocialPoint (acquired by Take-Two Interactive), and we operate with the mindset of a product company: small teams, high ownership, and a relentless focus on building things that matter.

Would you like to make an impact as part of a company that builds the best mobile apps used by millions of users worldwide? If so, discover your next challenge below.

## THE ROLE

At Labhouse, AI is not a feature — it's the core of what we build. As our AI Engineer, you will own the development, fine-tuning, and productionization of the models that make our apps work at a high level of accuracy and performance.

This is a hands-on engineering role. You will:

- Research, design, and train models suited to the specific needs of our products
- Fine-tune existing open-source and foundation models to maximize accuracy and performance
- Own the full model lifecycle: data curation, experimentation, evaluation, and production deployment
- Collaborate with mobile and backend engineers to integrate models directly into our apps
- Define and track the metrics that drive quality — and continuously push them in the right direction

## ABOUT YOU

Academic Background

A strong academic foundation matters to us. We're looking for candidates with a degree in Computer Science, Electrical Engineering, Mathematics, Physics, or a related technical field. A Master's or PhD in machine learning or a related area is a strong plus — but not a requirement if you can demonstrate equivalent depth through your work.

## What We Are Looking For

More than years of experience, we care about demonstrated ability to build. You should be able to point to models you've trained, fine-tuned, or shipped — whether in a professional setting, a research context, or on your own. A strong GitHub and/or Hugging Face profile is a significant advantage.

- Hands-on experience training or fine-tuning deep learning models that are used in production.
- Strong Python skills and experience with ML frameworks (PyTorch or JAX preferred)
- Comfort with the full model development cycle: data pipelines, experiment tracking, evaluation, deployment and scaling.
- Solid understanding of modern model architectures and when to apply them
- Experience with the Hugging Face ecosystem (Transformers, Datasets, Hub) is a strong plus
- Ability to work autonomously, make decisions under uncertainty, and ship without waiting for perfect conditions

AI Proficiency

You actively use AI tools in your own workflow — not as a novelty, but as a genuine productivity multiplier. You stay current with the state of the art and know how to apply the latest research to real product problems.

Communication

You communicate clearly and directly. You can explain technical decisions to non-technical stakeholders, flag blockers early, and collaborate effectively in a small, fast-moving team.

## Nice to Have

- Experience across multiple model domains (vision, audio, NLP, multimodal)
- Familiarity with on-device or edge inference optimization (quantization, distillation, ONNX)
- Experience integrating ML models into mobile or production environments
- Published research or open-source contributions in ML

## WHAT WE OFFER

- Attractive compensation, above market average
- Hybrid work model based in Barcelona
- High ownership from day one — you define the direction, not just execute on it
- Work directly with the founders and a senior, low-ego team
- A real product with real users — your work will have immediate, measurable impact

## HIRING PROCESS

1. Initial Interview: Meet with our Talent Acquisition Lead to discuss your background and fit for the role. We’ll also ask you to share your proudest projects.
2. Hiring Manager Interview: A deep dive into your experience and leadership capabilities.
3. Technical Assessment: Showcase your expertise through a practical task.
4. Final Interview: A conversation with our leadership team to align on vision and expectations.
5. Offer: Join our team and lead the development of our future-shaping apps!

## YOU SHOULD KNOW:

Labhouse is proud to be an equal-opportunity employer. However you identify or whatever your journey to this point, we welcome all candidates to apply for the position that inspires them.

Come join us and help us build a company that everyone is proud to be part of.

## About LABHOUSE 

## Company Overview
- **One-liner**: Labhouse is a Barcelona-based startup studio that builds category-defining, AI-powered mobile applications used by over 100 million people globally.
- **Entity Type**: Private (Startup Studio, pre-IPO)
- **Headquarters**: Barcelona, Catalonia, Spain (Pier 01, Barcelona Tech City)
- **Founded**: 2021
- **Founders**: Horacio Martos Borja (Co-founder & CEO) [theorg.com](https://theorg.com/org/labhouse)

## Core Business
- Primary industry: AI-powered mobile applications / Productivity Software
- Target customers: B2C consumers (primarily) and SMBs (via Invoice Fly)
- Mission or purpose statement: "Creating software that makes people's lives easier" by focusing on "productivity tools and AI-first consumer apps used by millions around the world" [labhouse.io](https://labhouse.io/)

## Products & Services
- **[Cleaner GO]**: A privacy-first utility app for cleaning, organizing, and managing device storage (contacts, photos) with on-device AI, zero cloud storage. Over 28 million downloads. [labhouse.io](https://labhouse.io/our-apps/)
- **[Invoice Fly]**: A cross-platform invoicing tool for freelancers and SMBs. Used by over 9 million businesses to create invoices, send quotes, and manage payments. [labhouse.io](https://labhouse.io/our-apps/)
- **[Summary AI]**: An AI-powered tool that generates summaries, action items, and insights from meetings, documents, and transcripts. Processes over 4 million summaries per month, with +412% week-over-week growth. [labhouse.io](https://labhouse.io/)

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed
- **Key Metric**: Over 100 million total downloads across 50 countries; 62% D30 retention in 14 markets [labhouse.io](https://labhouse.io/)
- **Notable Investors/Partners**: Not publicly disclosed (backed by pier 01, Barcelona Tech City ecosystem)
- **Growth Signals**: 50+ employees and growing; strong product-market fit evidenced by high retention rates; new app releases and rapid iteration cycles (TestFlight in 21 days) [labhouse.io](https://labhouse.io/)

## Competitive Advantages
- **Studio model**: One integrated team across product, design, engineering, AI, and growth — enabling faster shipping and tighter feedback loops compared to siloed organizations.
- **Small, lethal teams**: Teams built around one designer, two engineers, and one growth lead — no layers, no committees, maximizing velocity. [labhouse.io](https://labhouse.io/)
- **AI-native by design**: Rethink loops and workflows from scratch to make AI feel "invisible and obvious," rather than bolting LLMs onto legacy screens. [labhouse.io](https://labhouse.io/)
- **Data-driven growth**: "CAC, LTV, retention, and engagement are part of the product from day one. We build for long-term usage, not short-term hype." [labhouse.io](https://labhouse.io/)
- **Localized launches**: Pricing, copy, and metadata tuned per locale, never auto-translated — giving global reach with local relevance. [labhouse.io](https://labhouse.io/)

## Strategic Focus
- Continuing to scale existing apps (Cleaner GO, Invoice Fly, Summary AI) in Tier-1 and long-tail Asian markets.
- Building new AI-native mobile experiences through rapid prototyping (four-phase sprint: Concept → Build → Launch → Scale).
- Deepening monetization through subscription models and internationalization.
- Hiring aggressively for AI, engineering, and growth roles to support expansion. [jobs.ashbyhq.com/labhouse](https://jobs.ashbyhq.com/labhouse)

## Why Work Here
- **Talent density**: Small, high-ownership teams where "talent compounds when nobody hides." [labhouse.io](https://labhouse.io/)
- **Hybrid workspace**: Flexible remote/on-site policy; office at Pier 01 in Barcelona's tech hub. [builtin.com](https://builtin.com/company/labhouse-mobile-s-l)
- **Builders, not pointers**: Emphasis on hands-on builders who care about craft, not managers who delegate. [labhouse.io](https://labhouse.io/)
- **Fast iteration**: "We ship a TestFlight in weeks, not months" — real signals drive decisions, not politics. [labhouse.io](https://labhouse.io/)
- **Impact at scale**: Products used by millions daily across 50+ countries; chance to work on apps with proven traction.
- **Culture**: Described as "a small team of curious minds, obsessive product builders, and action-oriented problem solvers" who believe productivity software is "never finished." [labhouse.io](https://labhouse.io/)

## Sources
1. [labhouse.io — Company website](https://labhouse.io/)
2. [jobs.ashbyhq.com/labhouse — Careers page](https://jobs.ashbyhq.com/labhouse)
3. [builtin.com — Company profile and jobs](https://builtin.com/company/labhouse-mobile-s-l)
4. [theorg.com — Org chart and leadership](https://theorg.com/org/labhouse)
5. [labhouse.io/our-apps — Product portfolio](https://labhouse.io/our-apps/)

## Other roles at LABHOUSE 

- [Junior Marketing Video Editor](https://feeny.ai/job/junior-marketing-video-editor-labhouse-latin-america-yh9246zbmdcy) — Latin America
- [Graphic Designer  - MarketingTeam](https://feeny.ai/job/graphic-designer-marketingteam-labhouse-barcelona-hxrbn2hxs5zp) — Barcelona, Spain
- [Marketing Video Editor](https://feeny.ai/job/marketing-video-editor-labhouse-barcelona-9xhsabh2xa4q) — Barcelona, Spain
- [Senior or Lead Talent Acquisition](https://feeny.ai/job/senior-or-lead-talent-acquisition-labhouse-barcelona-r59wsv2c6r4x) — Barcelona, Spain
- [Marketing Backend Engineer](https://feeny.ai/job/marketing-backend-engineer-labhouse-spain-xwnn890qw238) — Spain
- [Staff Software Engineer](https://feeny.ai/job/staff-software-engineer-labhouse-barcelona-dmms96pkybkx) — Barcelona, Spain
- [AI Engineer Tools & Automations](https://feeny.ai/job/ai-engineer-tools-automations-labhouse-barcelona-6ye9e25q8zzr) — Barcelona, Spain
- [SEM Lead](https://feeny.ai/job/sem-lead-labhouse-spain-ty2qfcky2q2q) — Spain
- [Senior Accountant FP&A](https://feeny.ai/job/senior-accountant-fp-a-labhouse-barcelona-ejb083y5jj1m) — Barcelona, Spain
- [VP of Growth](https://feeny.ai/job/vp-of-growth-labhouse-barcelona-he7dxr25ht22) — Barcelona, Spain