Back-End Engineer (Ruby on Rails)

We’ve reached 90%+ adoption of AI coding tools across engineering, and we’re now moving towards more autonomous, AI-Augmented development at scale. At Preply, engineers have direct access to the best tools available, with the freedom to use them fully and experiment as they build. What you’ll be doing:

You will work in a cross-functional team alongside the Product Manager, Product Designer, UX Writers, Data Analytics, Technical Lead, Engineers and other cross-functional team members to deliver engaging features through A/B tests and build top-notch products, including, but not limited to:

• 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. - Think beyond the code and about our customers, understand their needs, and define solutions with the team;
• Balance short-term speed of development with the long-term technical quality of our systems;

What you need to succeed:

• Exposure to architectural patterns of large, high-scale web applications (e.g. well-designed APIs, high-volume data pipelines, efficient algorithms);

• Solid backend experience with Ruby on Rails, including working with complex business logic and evolving codebases;

• Willingness to support small JS/TS tasks when needed;

• Expertise in troubleshooting issues, identifying root causes, mitigating incidents, and putting safeguards in place to prevent recurrence;

• High level of self-organization, ownership, and responsibility;

• A great collaborator with strong verbal and written communication skills (minimum B2 English);

• Willingness to be on-call for your squad (1 week every 5 weeks);

• 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;

• 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.