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Preply

Senior Full-stack Engineer, Frontend-heavy

Preply

. Design and deliver user-facing features using React and TypeScript .

Posted 9/17/2026full-timeBarcelona • SpainSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates expertise in React and TypeScript for user-facing feature development, alongside proficiency in Python/Django for backend functionalities. Capable of balancing fast delivery with long-term stability while maintaining high code quality and effective collaboration.

Highest-signal resume keywords
React ExpertiseTypeScript ProficiencyPython/Django DevelopmentAI Workflow ManagementFull-Stack Development

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
ReactTypeScriptHTML5CSSPythonJavaNode.jsRubyRuby on RailsPHP
Soft Skills
Effective CommunicationCollaborationFeedbackProblem SolvingOwnership
Tools & Technologies
Agentic AIA/B TestingUX DesignData AnalysisEngineering Practices
Industry Keywords
Full-Stack DevelopmentUser ExperienceCode QualityArchitectural ConceptsEngineering Workflows

Tech Stack

Tools & technologies
DjangoJavaJavaScriptNode.jsPHPPythonReactRubyRuby on RailsTypeScriptGo

About the role

Key responsibilities & impact
  • Design and deliver user-facing features using React and TypeScript
  • Own the feature journey from UX shaping through implementation, launch, and A/B experimentation validation
  • Develop backend features using Python/Django
  • Improve the codebase and workflows across frontend, backend, and mobile
  • Collaborate with Design, Product, and Data to ideate, test, and validate user-facing experiences
  • Analyze metrics, formulate hypotheses, evaluate experiment results, and iterate based on impact
  • Balance fast delivery with long-term stability and avoid unnecessary complexity
  • Maintain high standards for code quality and teamwork
  • Help teammates grow through collaboration, feedback, and sound engineering practices

Requirements

What you’ll need
  • Forefront user of Agentic AI, with hands-on experience using AI beyond code generation
  • Ability to exercise judgment for architecture, business logic, and security when using AI
  • Ability to set up quality gates and safety nets for AI-enhanced engineering workflows
  • Primarily front-end-focused full-stack expertise, with approximately 70% front-end and 30% back-end work
  • Strong expertise in React, TypeScript, HTML5, and CSS
  • Expertise or exposure to Python, Java, Node.js, Ruby, Ruby on Rails, PHP, or Golang
  • Familiarity with key architectural concepts and building reliable, efficient services
  • Ability to solve challenges independently
  • Effective communication in English at B2 level or higher
  • Ownership of work quality and outcomes
  • Ability to contribute to engineering practices and support teammates through knowledge sharing and constructive feedback
  • Ability to relocate to Barcelona if not already based there
  • Comfortable working in a full-stack environment where 20–30% of tasks may involve backend development

Benefits

Comp & perks
  • A generous monthly allowance for lessons on Preply.com
  • Learning & Development budget
  • Time off for self-development
  • Competitive financial package with equity
  • Leave allowance
  • Health insurance
  • Attractive relocation package to join the Preply Barcelona Hub
  • Free mental health support platforms
  • Gympass-partnered wellness and gym centers throughout Spain