Overview In this role you will strengthen Preply's CRM platform, delivering timely and relevant communications to millions of users. You'll work in a cross-functional team to design scalable backend services and maintain React-based frontend surfaces, driving impact through experiments and reliable delivery. This position blends backend focus with frontend contributions to shape how learners and tutors stay engaged.

You'll operate in a fast-paced, world-spanning product area that directly supports learning at integral scale.

Compensaciones / Beneficios monthly allowance for lessons on Preply.com

Learning & Development budget time off for self-development equity health insurance relocation package

Responsabilidades

Build and maintain React frontend surfaces for CRM-facing experiences (e.g., notification and communication preferences)

Own backend-heavy services end-to-end—from discovery and design through development, deployment, and iteration—to power emails, push, and in-app (bell) notifications

Partner with Marketers and Head of CRM to translate campaign and lifecycle needs into reliable, scalable technical solutions

Establish and promote best practices across backend and frontend,



focusing on correctness and safe delivery of communications

Design architectures for high-traffic data-processing workloads determining who/what/when to send communications, scalable for future growth

Balance speed and experimentation with strong engineering fundamentals to keep systems maintainable and resilient

Continuously improve quality, observability, and reliability of the communications platform, mentoring teammates and upholding high standards

Requisitos principales Full-Stack Expertise with backend-heavy impact and ability to handle React/Typescript work

Exposure to front-end tech: hands-on React experience

Proven experience designing and operating scalable, high-traffic data-processing systems

Ability to drive ambiguous work from discovery to delivery, balancing speed with quality

Strong stakeholder collaboration and ability to explain technical trade-offs to non-technical partners

English communication at B2 level or higher strong collaboration clear communication problem solving

React/Typescript

Backend services design and operation

Scalable systems in high-traffic environments

📌 Senior II Full-Stack Engineer (back-end heavy) (Barcelona)
🏢 Preply
📍 Barcelona