MarTech Full Stack Developer
Location
Spain
Posted
66 days ago
Salary
0
Seniority
Senior
Job Description
MarTech Full Stack Developer
Leadtech Group
About USAt 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 global 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 RoleWe’re looking for a MarTech Full-Stack Developer to join our Marketing Technology & AdTech team. This is not the kind of “full-stack” role where you’ll spend your life centering buttons or debating border-radius values for three sprints. You’ll be working at the intersection of engineering, attribution, internal tooling, and growth — building the systems that make campaign measurement reliable, data flows usable, and marketing teams less dependent on guesswork. You’ll help us maintain and evolve the technical backbone behind tracking, postbacks, schemas, integrations, and internal tools. That includes working on our internal CRM/tooling, improving how marketing teams operate, and making sure data moves where it should, when it should, and in the format it should. You’ll collaborate closely with performance marketers, product owners, developers, and data stakeholders, acting as a bridge between business needs and technical implementation. And just so we’re clear: we don’t really care what you studied or where. Computer Science, Physics, Philosophy, self-taught, bootcamp, or “learned by breaking production and fixing it later” — all valid.**We care about what you can do, how you think, and how you take ownership. Also: if you use AI to move faster, think better, document clearer, or automate boring work — great. That’s a plus.
Job Requirements
- Must-have
- Strong backend experience with ** Node.js, Typescript and Python.**
- Experience with **APIs, REST, webhooks, and server-to-server integrations.**
- Solid **understanding of tracking, attribution, or event-based systems.**
- Experience building or maintaining **data pipelines.**
- Ability to work with **SQL / NoSQL databases.**
- Experience with c**loud environments and serverless architectures.**
- Strong **ownership mindset **— you improve systems, not just complete tasks.
- Strong communication skills in English** (written and spoken). Spanish is nice to have.
- GCP Stack (Important)Experience with the Google Cloud Platform ecosystem, especially:
- BigQuery (data warehousing & analysis)
- Cloud Functions / serverless workloads
- Pub/Sub (event-driven systems)
- Cloud Scheduler (orchestration / jobs)
- Datastore / Firestore (operational data & lightweight storage)
- Highly Relevant for This Role
- Experience defining and maintaining tracking schemas / event governance.
- Experience building or maintaining internal tools, CRMs, or operational dashboards.
- Comfort working across technical and non-technical stakeholders.
- Nice-to-have
- Frontend experience with React, Next.js, Vue, or Astro.
- Strong fundamentals in HTML, CSS, and web performance.
- Experience with MMPs (Appsflyer, Adjust, Branch).
- Familiarity with ad platform APIs and tracking flows.
- Experience with subscription businesses and tools like RevenueCat.
- Exposure to CDPs, marketing automation, or product analytics tools.
Benefits
- Growth and career development
- At Leadtech, we prioritize your growth. Enjoy a flexible career path with personalized internal training and an annual budget for external learning opportunities.
- Work-Life balance
- Benefit from a flexible schedule with flextime. Enjoy free Friday afternoons with a 7-hour workday, plus a 35-hour workweek in July and August so you can savor summer!
- Comprehensive benefits
- Competitive salary, full-time permanent contract, and top-tier private health insurance (including dental and psychological services).
- 25 days of vacation plus your birthday off, with flexible vacation options—no blackout days!
- Unique Perks
- In our office in Barcelona you’ll find it complete with free coffee, fresh fruit, snacks, a game room, and a rooftop terrace with stunning Mediterranean views.
- Additional benefits include ticket restaurant and nursery vouchers, paid directly from your gross salary.
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