Senior II Back-End Engineer Location : Barcelona, Spain

Overview

At Preply, we’re all about creating life-changing learning experiences. We help people discover the magic of the perfect tutor, craft a personalized learning journey, and stay motivated to keep growing. Our approach is human-led, tech-enabled - and it’s creating real impact. So far, 90,000 tutors have delivered over 20 million lessons to learners in more than 175 countries. Every Preply lesson sparks change, fuels ambition, and drives progress that matters.

Meet the team

The MarTech team builds the infrastructure that powers Preply’s growth engine. We focus on scaling performance marketing through smart automation, precise tracking, and efficient campaign tooling.

Our work is about engineering systems that drive measurable results, from optimizing SEM and paid marketing workflows to managing SEO infrastructure, attribution, and multi-channel communications. We prioritize efficiency, data integrity, and automation to help marketing teams operate at scale and make better decisions.

You’ll work at the intersection of marketing, data, and engineering, and see the direct business impact of the systems you own.

Role

As a Senior II Backend Engineer, you’ll set the technical direction, lead cross-functional projects, and build systems that power Preply’s global growth engine. Your work will shape how millions of learners connect with tutors worldwide, tackling challenges that are complex in scope and critical to our success.

We are tech-agnostic, meaning we are open to candidates with diverse technology backgrounds, such as Java / Spring, Node.js / Express.js, Ruby / Ruby on Rails, Scala / Play, PHP, or Golang. While Python is our primary programming language, prior experience with it is not mandatory. What truly matters is your enthusiasm for learning Python and your ability to adapt quickly to using it for product development.

What you’ll be doing

• Own and drive technical vision across two Martech squads focused on ad delivery, SEO systems, automation, and attribution.
• Develop and own backend features using Python / Django, supporting the creation of new backend services as well as design, create, and / or troubleshoot integrations with third-party vendors.
• Scope and lead cross-functional initiatives involving marketing, data, product, and other engineering teams.
• Design and implement scalable backend systems, data pipelines, and integrations with third-party platforms (e.g., Meta, TikTok, Google Ads)
• Mentor and coach junior and middle engineers across squads
• Improve performance, tracking, monitoring, and reliability of our systems with an eye on long-term scalability.
• Collaborate closely with PMs, EMs, designers, and analysts to make data-informed, user-centered decisions.
• Champion engineering best practices : test automation, documentation, observability, and quality-first culture.

What you need to succeed

Nice to have

Why engineers choose Preply

Impact that scales What you build helps unlock progress for learners in 175+ countries. Every feature you ship supports real people, reaching real goals.

Ownership that matters We don’t just follow roadmaps, we shape them. Engineers lead bold projects, make key tech decisions, and see their work drive business results.

Learning built in We work cross-functionally with data, product, design, marketing. So there’s always a new challenge and a new skill to pick up.

Modern tech, real standards From cloud-first infra to observability-first ops, we prioritize scalable systems and smart engineering practices that last.

Why you’ll love it at Preply

Diversity, Equity, and Inclusion

Preply is committed to creating a diverse and inclusive environment where people from all backgrounds can thrive. Different opinions and viewpoints are key ingredients in our success as a multicultural Ed-Tech company.

Preply will consider all applications for employment without regard to race, color, religion, gender identity or expression, sexual orientation, national origin, disability, age or veteran status. Together, we are The World Class.

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