Senior Full-stack Engineer (frontend-heavy)

What you’ll be doing

• Design and deliver user-facing features using React, and TypeScript. You’ll own the entire journey, from shaping the UX, to implementation, to launch and validation through our A/B experimentation framework. - Develop backend features using Python/Django

• Help us improve our codebase and workflows by applying practical best practices across frontend, backend, and mobile. - Collaborate with Design, Product, and Data to ideate, test, and validate user-facing experiences. Expect to dive into metrics, formulate hypotheses, analyze experiment results, and iterate quickly based on impact. - Strike the right balance between fast delivery and long-term stability, helping us ship impactful features without adding complexity. - Set a high bar for code quality and teamwork, and help others grow through collaboration, feedback, and good engineering practices. ## 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. - Front-end Expertise: Strong expertise in React, Typescript, HTML5, and CSS. - Exposure to back-end tech: Expertise in Python/Java/Node.js/Ruby/Ruby on Rails/PHP/Golang. - Understanding Architectural Patterns: While deep backend expertise isn’t required, we do value familiarity with key architectural concepts and an ability to contribute to building reliable, efficient services that support user-facing features at scale. - 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. - Ownership: You take responsibility for the quality and outcomes of your work, not just the code. You can make thoughtful technical decisions, contribute to improving our engineering practices, and support teammates through knowledge sharing and clear, constructive feedback. - Deep, hands-on expertise in AI tools, especially in agentic AI SDLC. ## Why you’ll love it at Preply

• An open, collaborative, dynamic and diverse culture;

• A generous monthly allowance for lessons onPreply.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!). #LI-KD2

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.