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# Senior Full-stack Engineer (backend-heavy)

- **Company:** Preply Inc.
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Distributed Systems, Django Web Framework, Python (Programming Language), Systems Development Life Cycle, TypeScript, Web Applications, ReactJS, Backend, Front End Software Development, Virtual Agents
- **Published:** August 12, 2026
- **Apply:** https://eu.experteer.com/career/view-jobs/senior-full-stack-engineer-backend-heavy-08036-barcelona-cataluna-spanien-58891870

## About the Role

opportunities and measure impact * Shape system design for scalable, reliable, and maintainable architectures * Navigate trade-offs and align technical investments with business goals * Drive technical leadership across the team and contribute to architectural direction * Pursue excellence through craftsmanship, learning, and helping others grow Tasks * Backend-heavy Full-Stack capability with ~60% backend focus and ~40% frontend * Deep AI expertise in Agentic AI, with ability to redesign SDLC and build reusable AI assets * Experience designing large-scale web applications, APIs, and distributed systems * Proven technical leadership and ability to influence decisions * Product-minded with the ability to translate challenges into scalable solutions using data * Proactive problem-solving and independent work style with collaborative instincts * Strong ownership, accountability, and track record from concept to delivery * Excellent collaboration and communication across engineering, aaaa
with design, and data * English level B2 or higher * Experience with observability, reliability, monitoring, and on-call readiness Key requirements * monthly lesson credit * Learning & Development budget * health insurance * relocation package to Barcelona * on-site mental health support platforms * Gympass wellness access

## Description

Experteer Overview In this role you will join a cross-functional team to deliver impactful learning experiences for tutors and learners at scale. You will shape backend and frontend engineering across Python/Django and React, drive architectural decisions, and mentor others to raise the engineering bar. You'll apply data-driven methods to validate ideas, work with product and UX teams, and own initiatives from discovery to deployment. This position offers the chance to influence the future of education at a global level through AI-enabled, user-centric software. Pay / Benefits * Develop and own backend features with Python/Django and integrate with third-party vendors * Build frontend experiences in React/Typescript and contribute to experimentation frameworks * Lead complex initiatives from discovery through deployment with lifecycle ownership * Mentor peers, conduct architectural reviews, and promote frontend/backend best practices * Collaborate with Product, Data, and UX to identify opportunities and measure impact * Shape system design for scalable, reliable, and maintainable architectures * Navigate trade-offs and align technical investments with business goals * Drive technical leadership across the team and contribute to architectural direction * Pursue excellence through craftsmanship, learning, and helping others grow Tasks * Backend-heavy Full-Stack capability with ~60% backend focus and ~40% frontend * Deep AI expertise in Agentic AI, with ability to redesign SDLC and build reusable AI assets * Experience designing large-scale web applications, APIs, and distributed systems * Proven technical leadership and ability to influence decisions * Product-minded with the ability to translate challenges into scalable solutions using data * Proactive problem-solving and independent work style with collaborative instincts * Strong ownership, accountability, and track record from concept to delivery * Excellent collaboration and communication across engineering, product, design, and data * English level B2 or higher * Experience with observability, reliability, monitoring, and on-call readiness Key requirements * monthly lesson credit * Learning & Development budget * health insurance * relocation package to Barcelona * on-site mental health support platforms * Gympass wellness access


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