Senior II Back-End Engineer

We power peoples progress.

At Preply were 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 its creating real impact. So far 90000 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 Preplys 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.

Youll work at the intersection of marketing data and engineering and see the direct business impact of the systems you own.

As a Senior II Backend Engineer youll set the technical direction lead cross-functional projects and build systems that power Preplys 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 considering candidates with diverse technology backgrounds such as Java/Spring 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 youll 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

• Exposure to architectural patterns of a large high-scale web application (e.g. well-designed APIs high-volume data pipelines efficient algorithms);
• Proven experience leading complex ambiguous or greenfield projects end-to-end
• Strong communication and cross-functional collaboration skills (English level B2)
• Willingness to be on-call for your squad (1 week every 5 weeks).

Nice to have

• Side projects or product ownership experience especially in marketing or growth contexts.
• Experience designing systems for marketing attribution experimentation platforms or recommendation engines.
• Familiarity with cloud platforms (AWS/GCP) and modern DevOps practices.
• Familiarity and willing to support small JS/TS tasks when needed.

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 dont 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 theres 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 youll love it at Preply:

• An open collaborative dynamic and diverse culture.
• A generous monthly allowance for lessons Learning & Development budget and time off for your self-development;
• A competitive financial package with equity leave allowance and health insurance;
• Not in Barcelona We offer an attractive relocation package to join us in our Preply Barcelona Hub;
• Access to free mental health support platforms;
• Access to Gympass-partnered wellness and gym centers throughout Spain to promote and support well-being and physical health;
• The opportunity to shape the lives of learners and tutors through language learning and teaching in 175 countries (and counting!).

Our Principles

• Care to change the world - We are passionate about our work and care deeply about its impact to be life changing.
• We do it for learners - For both Preply and tutors learners are why we do what we do. Every day we focus on empowering tutors to deliver an exceptional learning experience.
• Keep perfecting - To create an outstanding customer experience we focus on simplicity smoothness and enjoyment continually perfecting it as every detail matters.
• Now is the time - In a fast-paced world it matters how quickly we act. Now is the time to make great things happen.
• Disciplined execution - What makes us disciplined is the excellence in our execution. We set clear goals focus on what matters and utilize our resources efficiently.
• Dive deep - We leverage business acumen and curiosity to investigate disparities between numbers and stories unlocking meaningful insights to guide our decisions.
• Growth mindset - We proactively seek growth opportunities and believe todays best performance becomes tomorrows starting point. We humbly embrace feedback and learn from setbacks.
• Raise the bar - We raise our performance standards continuously alongside each new hire and promotion. We build diverse and high-performing teams that can make a real difference.
• Challenge disagree and commit - We value open and candid communication even when we dont fully agree. We speak our minds challenge when necessary and fully commit to decisions once made.
• One Preply - We prioritize collaboration inclusion and the success of our team over personal ambitions. Together we support and celebrate each others progress.

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.

#LI-KD2

Required Experience:

Senior IC