Marketing Backend Engineer

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.