About Us
At Leadtech, we’ve been redefining digital businesses since 2009, creating innovative online solutions that reach millions of users every month. With a diverse team of over 700 members from 23+ nationalities, we’re united by a passion for creativity and collaboration.
About Us
At Leadtech, we’ve been redefining digital businesses since 2009, creating innovative online solutions that reach millions of users every month. With a diverse team of over 700 members from 23+ nationalities, we’re united by a passion for creativity and collaboration.
We specialize in delivering user‑centric experiences across web and mobile platforms, where people can connect with our products like never before.
We’re proud of our integral reach and committed to fostering an inclusive workplace where every individual contributes to our shared vision of bringing cutting‑edge projects to life. Learn more about our journey and mission on our page!
About The Role
We are looking for a MarTech Specialist with strong expertise in web tracking projects, ideally with experience in companies with subscriptions models.
This is not a “ticket executor” role. We want someone who owns the tech side of web tracking, challenges assumptions, and builds scalable, future‑proof solutions.
And one more thing: we don’t care what you studied. Master’s in Advanced Translation? Great. Law & Politics double degree? Fantastic. Finance vocational training? Perfect. Degrees are nice, but here we care about your skills, curiosity, and hands‑on experience.
Your Mission
Own the technical implementation and maintenance of web tracking (client-side and server-side) and argue for scalable, future‑proof solutions.
Lead Google Tag Manager setups (including S2S GTM) and ensure accurate data capture for analytics and attribution.
Work on web projects,



ideally for subscription‑based businesses;
collaborate with SEO, analytics, and product teams on tracking needs.
Implement and manage online payments data capture (e.G., Stripe, card gateways) for analytics and attribution.
Use GA4 and Amplitude;
knowledge of Adobe Analytics or similar enterprise platforms is a plus, but GTM expertise is mandatory.
Maintain robust tagging and tracking (events, funnels, data layers);
understand Ad Networks and how Campaigns/Ad Groups/Ads relate to tracking and attribution.
Collaborate with SEO teams on landing pages, organic funnels, and Google Search Console insights;
apply Technical SEO fundamentals (indexation, sitemaps, canonicals, hreflang, Core Web Vitals).
Engage with CMPs/consent management tools (Didomi, OneTrust, Usercentrics, etc.) and coordinate with Legal teams to ensure proper signal firing and compliance (GDPR, DMA, Consent Mode V2).
Leverage cloud systems (ideally GCP: BigQuery, Cloud Functions, Pub/Sub, APIs) and SQL to query data in a Data Warehouse (e.G., BigQuery, Databricks).
Coordinate with App MarTech where relevant to broaden cross‑channel capabilities and learn from App MarTech specialists over time.
Requirements
Must-have
Deep experience working on web products in production. Real web — not just diagrams, not just tools, not just theory. The kind where browsers disagree, cookies disappear, and tracking still needs to work.




Deep understanding of attribution across modern tracking environments (browser restrictions, signal loss, privacy frameworks, and server‑side recovery strategies — yes, the real‑world kind, not the slide‑deck version). You understand how tracking infrastructure decisions directly impact attribution accuracy and campaign optimization.
Solid understanding of how Ad Networks work — e.G., the difference between Campaign / Ad Group / Ad, how CAPI or parameter‑based tracking works, and how UA teams rely on these setups. You don’t need to run campaigns, but you need to speak their language (and understand why they panic when conversions drop 12%).
Experience working with architectures where tools like Google Tag Gateway (GTG) or equivalent network‑side signal routing solutions play a key role in maintaining conversion visibility — particularly in environments with high non‑Chrome traffic share (because, unfortunately, not everyone lives inside Chrome).
Experience designing, implementing, and optimizing server‑to‑server (S2S) conversion and event tracking setups across Ad Networks — regardless of the tool used (e.G., server‑side GTM, AddingWell, Staple, direct API integrations, or custom pipelines). You understand how S2S tracking impacts campaign optimization, signal quality, and attribution (and why “browser‑only will be fine” is usually famous last words).
You understand how hashing, normalization, and formatting of user identifiers directly impact match rates and downstream optimization. Metrics like Event Match Quality (EMQ) or equivalent signal quality indicators across networks are part of your daily toolkit.
Hands‑on experience with online payments (Stripe, card gateways) and the ability to capture and process

📌 Martech Specialist (Barcelona)
🏢 Leadtech Group
📍 Barcelona