Description

We are looking for a MarTech Backend Developer to strengthen our Marketing Technology & AdTech team. This role is focused on backend engineering with a direct impact on campaign attribution, tracking, data flows, and integrations with advertising platforms.

You will collaborate with performance marketers, analysts, and product teams to ensure accurate campaign measurement, reliable data pipelines, and scalable technical infrastructure.

Although this is primarily a backend role, you will occasionally work with frontend tasks (tracking scripts, basic landing page support, A/B test setup).

 

Key Responsibilities

Backend / Infrastructure (main focus):

  • Design and maintain server-to-server integrations with ad networks (Meta, Google Ads, TikTok, Snapchat).
  • Build APIs and middleware for event ingestion and delivery.
  • Develop and maintain data pipelines (API/CSV → SQL/NoSQL databases → warehouses like BigQuery, Redshift, Snowflake).
  • Implement serverless functions (AWS Lambda, Google Cloud Functions, or equivalent).
  • Ensure monitoring, QA, and debugging of discrepancies between internal data and ad platforms.
  • Work with Git, CI/CD, and cloud infrastructure (AWS / GCP / Vercel / Netlify).

Attribution & Tracking:

  • Implement attribution models (GA4, Appsflyer, Adjust, or custom server-side).
  • Manage event deduplication, postbacks, and tracking flows.
  • Integrate and troubleshoot tracking scripts (Meta Pixel, GTM, TikTok Pixel).

Frontend:

  • Support and maintain basic landing pages (responsive layout, UTMs, CRO testing).
  • Add and debug tracking/analytics scripts.

Requirements

  • Strong backend experience with Node.js, Python, or Go.
  • Proven experience with REST APIs, webhooks, and API integrations.
  • Experience with serverless environments (AWS Lambda, Cloud Functions, etc.).
  • Solid knowledge of SQL/NoSQL databases.
  • Experience with Git, CI/CD pipelines.
  • Knowledge of attribution/tracking mechanisms (pixels, UTMs, ID-based matching).
  • Ability to build/maintain data pipelines (API/CSV → database).

Nice-to-have:

  • Experience with Appsflyer, Adjust, Branch (MMPs).
  • Familiarity with ad platform APIs (Meta, Google Ads, TikTok, etc.).
  • Experience with frontend frameworks (React, Next.js, Vue.js) or CSS libraries (Tailwind, SCSS).
  • Knowledge of marketing automation/CDPs (Segment, HubSpot, RudderStack).
  • Awareness of privacy regulations (GDPR/CCPA).

 

Soft Skills

  • Clear communicator: able to work directly with non-technical stakeholders (marketing teams).
  • Proactive problem-solver with ownership of data accuracy.
  • Structured, fast, and reliable in solving issues under time pressure.

Benefits

Your team

We’re team-first. If you believe in the power of collaboration and that the team’s success is your success, then you’re one of us!

Fun is fundamental. We believe in forming strong bonds in and outside the office. That’s why we have a team-building budget and organize activities to enjoy ourselves.

Positivity wins the day. Bring a positive attitude and communicate openly. Self-awareness and an openness to learn are always a plus.

 

Perks of being one of us

  • Full-time, permanent contract
  • Flexible time off, no blackout dates, plus your birthday, Christmas’ Eve and New Year’s Eve off
  • Remote work
  • Flextime (7 – 9:30 a.m. / 3:30 – 7:30 p.m)
  • Free Friday afternoons (a 7-hour workday!) + 35-hour week in July and August (free afternoons here we come!)
  • Enhanced career path designed just for you
  • External training budget
  • We celebrate all company landmarks

 

Sounds good? Apply now! We’re looking forward to getting to know you.

 

Location

You’ll have the flexibility to choose whether you’d like to come to the office every day, from time to time, or work fully remote. We want you to find the best combination for you.

If you prefer to be surrounded with amazing people, our exceptional office is in Barcelona’s Blue Building, located right on the city’s seafront. Besides our stunning views, you’ll enjoy our office perks such as free fruit, snacks, and coffee and you’ll also be able to take part in our Mario Kart and table tennis competitions.

We are an Equal Opportunity Employer and are committed to providing employees with a work environment free of discrimination and harassment.

The personal data you provide will be used solely to manage your candidacy for the purposes of this position. You can exercise your rights of access, rectification, or cancellation by sending a letter to Avenida Litoral, 12-14, 5ta planta, Barcelona 08005. Additionally, you can email us at protecciondedatos@LeadTech.com, including documentation proving your identity.