---
title: 'Marketing Backend Engineer at LABHOUSE'
canonical: 'https://feeny.ai/job/marketing-backend-engineer-labhouse-spain-xwnn890qw238'
type: 'job'
last_seen: '2026-09-08'
---

# Marketing Backend Engineer at LABHOUSE 

- **Company:** LABHOUSE 
- **Location:** Spain
- **Employment:** full-time
- **Work type:** remote
- **Posted:** 2026-07-29
- **Last confirmed live:** 2026-09-08
- **Apply:** https://jobs.ashbyhq.com/labhouse/b12a2203-a5d9-4ee5-a66b-2bf2ec9dd0b6

## Job description

Labhouse is a fast-growing startup that builds, launches, and scales its own AI & Productivity Apps, operating under a subscription-based business model.

Based in Barcelona, Labhouse was founded by Andrés Bou and Horacio Martos (Co-Founders of SocialPoint).

We operate at the intersection of mobile technology, AI, and product-driven growth, with a strong focus on experimentation and performance.

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.

## RESPONSIBILITIES:

- Own the end-to-end attribution and signals system, becoming the company’s expert driving technical decisions and best practices across the organization
- Implement and improve attribution models (Appsflyer, GA4, custom server-side) ensuring it remains accurate and reliable.
- Design and maintain server-to-server integrations with ad networks (Meta, Google Ads, ASA, TikTok, Snapchat).
- Ensure monitoring, QA, and debugging of discrepancies between internal data and ad platforms.
- Continuously improve attribution accuracy and signal quality, through custom pipelines, experimentation, monitoring and debugging of discrepancies.
- Own the long-term evolution of the platform, making thoughtful architectural and prioritization decisions that balance business impact, scalability, reliability and maintainability.

## ABOUT YOU:

Technical expertise:

- Strong knowledge of attribution / tracking mechanisms ( pixels, UTMs, ID-based matching, MMPs, SRN, SKAN, W2A, etc.)
- Previous experience enriching and sending signals from mobile apps to Ad Networks to optimize campaign performance (Meta CAPI, TikTok CAPI, Google Ads API, etc)
- Proven experience with REST APIs, webhooks, API integrations and serverless environments.
- Solid knowledge of SQL/NoSQL databases.
- Proficiency in backend technologies such as TypeScript, Python, and Go.
- High ownership and proactivity
- Experience working in fast-growing, product-led organizations, balancing speed, scalability, and reliability in ambiguous environments

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 engineering, product, and marketing.

## 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.

## HIRING PROCESS

1. TA Interview – Initial conversation to get to know each other and understand your background.
2. CEO / Product Team Interview – Deep dive into your product thinking, experience, and fit with the team.
3. Technical Case – Practical exercise to assess your product, analytical, and strategic capabilities.
4. Final Interview – Final conversation to ensure alignment on expectations, culture, and role fit.

## 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
- [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
- [VP of Growth](https://feeny.ai/job/vp-of-growth-labhouse-barcelona-he7dxr25ht22) — Barcelona, Spain