Senior Full-Stack Engineer

We power people’s progress.

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.

Our primary programming languages are Python and JS (React), but we take a tech-agnostic approach. We welcome candidates with diverse back-end technology backgrounds, including Java/Spring, Node.js/Express.js, Ruby/Ruby on Rails, Scala/Play, PHP, or Golang.

Meet the team!

Join Preply’s Teams and help us power people’s progress through life-changing learning experiences. We’re on a mission to combine the magic of the best tutors with cutting-edge AI to create personalized journeys that keep learners motivated and inspired. Together, we’ll transform how students expand their vocabulary, master conversational fluency, and deepen comprehension - unlocking their full potential and sparking a lifelong love for learning. Are you ready to make an impact? Let’s redefine education!

The Preply Engineering Team provides the tools to help unlock human potential through learning.

We move fast, test often, and use data to learn what makes a difference.

What you’ll be doing:

• Front-End Development: Develop frontend features in React/Typescript as a whole ownership of feature flow, launched in our A/B experimentation framework.
• Back-end Development: Develop and own backend features using Python/Django, supporting the creation of new backend services and designing, creating, and troubleshooting integrations with third-party vendors.
• Raising the bar of our end-to-end solutions: Leverage previous experience to implement and socialize current best practices in front-end and back-end.
• Use a Data-driven approach: Our goal is not to deliver code but to deliver user value. Data-driven approaches and experimentation are its heartbeats. Together with the product, data, and UX teammates, the team is responsible for value delivery, analysis, ideation, and focus.
• Prioritization: Strike a balance between delivering fast results and maintaining high-quality, sustainable systems.
• Chasing Excellence: Embody a mindset of mastery by continuously seeking to improve your craft, delivering work of exceptional quality, and inspiring those around you to aim higher.

What you need to succeed:

• Full-Stack Expertise: This role is primarily front-end focused, with approximately 70% of the work dedicated to front-end development and 30% to back-end development, requiring solid front-end expertise and well-rounded full-stack engineering skills.
• Exposure to front-end tech: Strong expertise in React, Typescript, HTML5, and CSS.
• Understanding Architectural Patterns: We operate on a large scale, requiring you to have experience in solving problems and building efficient services that can handle significant user traffic and data processing.
• Proactive Problem-Solving: You will be expected to face and solve challenges independently, both in the codebase and in our product initiatives.
• Communication Skills: Good at working with others and communicating effectively in English at a B2 level or higher.

Why you’ll love it at Preply: 

• Open, collaborative, dynamic, and diverse culture.
• A generous monthly allowance for lessons on Preply.com, 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 today's best performance becomes tomorrow's 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 don’t 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 other's 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