Senior Full-stack Engineer (backend-heavy)
Preply
- Barcelona, Barcelona, Spain
- Remote
- Posted Aug 10, 2026
Job description
About the role
The Senior Full‑Stack Engineer will work in a cross‑functional squad to design, build and own backend services (Python/Django) and front‑end features (React/TypeScript), lead complex initiatives, drive architectural decisions, mentor teammates and embed AI‑augmented development across the product lifecycle.
About the company
Preply is a global ed‑tech company that connects learners with tutors in 90+ languages across 180 countries. Fresh from a $150 M Series D unicorn round, it aims to transform education with a human‑led, AI‑enhanced platform serving 100 000+ tutors.
Requirements
- Backend‑heavy full‑stack expertise (≈60 % backend, 40 % frontend).
- Deep hands‑on experience with Agentic AI, building reusable AI assets and AI‑based development workflows.
- Experience designing large‑scale web applications, APIs, distributed systems and high‑volume data flows with scalable architecture.
- Proven technical leadership influencing decisions, driving engineering best practices and contributing to architectural direction.
- Strong product mindset; ability to translate ambiguous business problems into scalable technical solutions using experimentation and data.
- Proactive problem‑solving skills, comfortable navigating ambiguity and knowing when to involve others.
- High ownership and accountability, with a track record of delivering initiatives from concept to measurable outcomes.
- Excellent collaboration, stakeholder management and communication skills; English level B2 or higher.
- Experience in cross‑functional teams, code/design reviews and raising the engineering bar through knowledge sharing.
- Understanding of observability, reliability, monitoring and operational best practices; willingness to participate in on‑call rotation (1 week per 5 weeks).