---
title: 'Lead Flutter Developer at LABHOUSE'
canonical: 'https://feeny.ai/job/lead-flutter-developer-labhouse-barcelona-4yt5ytd6s8e6'
type: 'job'
last_seen: '2026-09-08'
---

# Lead Flutter Developer at LABHOUSE 

- **Company:** LABHOUSE 
- **Location:** Barcelona, Spain
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-05-13
- **Last confirmed live:** 2026-09-08
- **Apply:** https://jobs.ashbyhq.com/labhouse/9c7d5cea-2f3c-46ee-b289-a2dbad8f3a8d

## 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.

## ABOUT THE ROLE

We are looking for an experienced and driven Lead Mobile Developer who will play a pivotal role in our development team. As a lead, you will take ownership of the end-to-end product lifecycle, from architecture design to deployment. You will define technical guidelines, mentor junior developers, and ensure that our apps are built on scalable, efficient, and innovative architectures.

In this role, you will also have the exciting opportunity to integrate AI models into our new apps through APIs, pushing the boundaries of what our products can achieve.

## ABOUT YOU

## ACADEMIC BACKGROUND:

- Degree in Computer Science, Telecommunications Engineering, or a related technical field.

## TECHNICAL EXPERTISE:

- Strong knowledge of Flutter and Dart, with proven experience in building and maintaining mobile apps.
- Solid understanding of infrastructure with AWS and/or GCP, including architecture design, deployment, and scalability.
- Experience working with and managing diverse architectures, with the ability to evaluate and implement the most suitable approach for each product.
- Knowledge of Firebase services (Firestore, Authentication, Storage, Functions) and familiarity with API integrations.
- Ability to define and implement coding standards, best practices, and scalable architectures.
- High agility and ability to implement changes in the app very quickly, adapting to product needs with speed and precision.

## LEADERSHIP SKILLS:

- Proven experience leading or mentoring development teams.
- Ability to guide and upskill junior developers, fostering their growth and performance.
- Strong organizational and project management skills to ensure deadlines are met without compromising quality.

## PROBLEM-SOLVING AND PRODUCT FOCUS:

- Excellent problem-solving and analytical skills, with the ability to resolve complex technical challenges.
- Eye for detail and a product-first mindset, with a passion for creating exceptional user experiences.
- Self-driven, entrepreneurial attitude with the ability to work autonomously and take ownership of projects.

## COMMUNICATION:

- Good level of spoken and written English.
- Ability to collaborate effectively with cross-functional teams, including design, product, and marketing.

## NICE TO HAVE:

- Experience in integrating AI models into mobile applications.
- Knowledge of backend technologies (e.g., Typescript, Python, Node.js, Java).
- Experience launching personal or side projects, especially apps.
- Native iOS development experience is highly valued.

## WHAT WE OFFER:

- Remote work from anywhere in Spain. If you are based in Barcelona, we would love for you to join us at the office (Barcelona Tech City) at least two days a week.
- Flexible working hours.
- Competitive compensation
- High-end equipment for your development.
- Permanent contract with competitive compensation.
- A young and top entrepreneurial team in a dynamic startup environment.
- Opportunity to lead, grow, and take on big challenges.
- Work with cutting-edge technologies, including the chance to integrate AI models into new apps.

## THE 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 – not the code, but the visual side of the apps: links, screenshots, or demo videos that show what you've built.
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
- [AI Engineer](https://feeny.ai/job/ai-engineer-labhouse-barcelona-7r48da6eb3qx) — Barcelona, Spain
- [Senior Accountant FP&A](https://feeny.ai/job/senior-accountant-fp-a-labhouse-barcelona-ejb083y5jj1m) — Barcelona, Spain