Senior Back-End Engineer

Stack

Responsibilities

• ▹Develop and own backend features using Python/Django, supporting the creation of new backend services
• ▹Design, create and troubleshoot integrations with third-party vendors
• ▹Understand customer needs and define solutions with the team
• ▹Balance short-term speed of development with the long-term technical quality of systems
• ▹Guide the team in informed technical decisions: test culture, code reviews, monitoring and scalability of tools
• ▹Work alongside the Product Manager, Product Designer, UX Writers, Data Analytics, Technical Leads and Engineers to deliver features through A/B tests

Requirements

• ▹Exposure to architectural patterns of a large, high-scale web application (well-designed APIs, high-volume data pipelines, efficient algorithms)
• ▹Familiar with JS/TS and willing to support small JS/TS tasks when needed
• ▹Expertise in troubleshooting: identifying the root cause, mitigating it and setting up safeguards to prevent future issues
• ▹Deep, hands-on expertise in AI tools, especially in agentic AI SDLC
• ▹High level of self-organization, ownership and responsibility
• ▹Great collaborator with excellent verbal and written communication skills, minimum B2 English level
• ▹Willingness to be on-call for your squad (1 week every 5 weeks)
• ▹Backgrounds in Java/Spring, Node.js/Express.js, Ruby on Rails, Scala/Play, PHP or Golang are welcome; Python is the primary language but prior experience is not mandatory if you are eager to learn it

Soft skills

What we offer

• ▹Open, collaborative, dynamic and diverse culture
• ▹Generous monthly allowance for lessons on Preply.com, Learning & Development budget and time off for self-development
• ▹Competitive financial package with equity, leave allowance and health insurance
• ▹Relocation package to join the Barcelona hub if you are not based there
• ▹Free mental health support platforms
• ▹Access to Gympass-partnered wellness and gym centers in Spain
• ▹50-60 releases per day through top-notch CI/CD, with the freedom to use AI coding tools fully

About the company

Preply is an ed-tech company combining the best tutors with cutting-edge AI to create personalized learning journeys. Its engineering team releases 50-60 times per day and has 90%+ adoption of AI coding tools.