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Backend Engineer - Node.js / Typescript

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cozycozy

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Location:
France , Paris

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Contract Type:
Not provided

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Salary:

Not provided

Job Description:

As a Backend Engineer at Cozycozy, you will be the expert driving the expansion of our global inventory, which features over 20 million accommodations. Your core mission is to design, build, and maintain high-performance, resilient connections with our vast network of partners, including booking sites, specialized marketplaces, and channel managers. Working deep within our core back-end systems, you will own the full integration lifecycle - from initial Node.js/TypeScript development and deployment to ongoing maintenance and optimization. This is a crucial, high-impact role where your expertise will directly enable millions of travelers worldwide to find their perfect stay by ensuring we have accurate, real-time price and availability data. Beyond development, you will be key in shaping our future technical standards and actively coaching and growing the skills of our integration team.

Job Responsibility:

  • Design and develop integrations: Lead the full development lifecycle for integrating new accommodation partners using Node.js/TypeScript
  • Data Collection & Extraction: Develop resilient and scalable code to fetch both static partner information and real-time price & availability data, utilizing partner APIs and advanced web scraping techniques
  • Quality Assurance: Implement comprehensive testing (unit, integration) and monitoring to ensure the accuracy, reliability, and low latency of all acquired data
  • Data Processing Pipeline: Own the maintenance and optimization of back-end services responsible for data ingestion, transformation, and processing
  • Database Management: Work hands-on with our data stores, primarily MongoDB and PostgreSQL, optimizing data models and query performance for integration-related services
  • Reactive Programming: Leverage RxJS effectively within the Node.js environment to manage asynchronous data streams and ensure efficient, non-blocking data flow
  • Mentorship: Actively mentoring junior engineers, providing code reviews, technical guidance, and helping them grow their expertise in large-scale integration and back-end development
  • Process Improvement: Drive initiatives to standardize integration frameworks, improve deployment pipelines, and enhance the overall efficiency of our partner onboarding process
  • Technical Consultation: Collaborate with Product Managers and Business Development teams to assess the technical feasibility and scope of new partnership opportunities

Requirements:

  • 3+ years of experience in back-end engineering, with a strong focus on high-throughput data integration systems
  • Deep professional experience with Node.js and TypeScript in a production environment
  • A good working knowledge of both NoSQL (MongoDB) and relational (PostgreSQL) databases, including schema design and performance tuning
  • A solid understanding and practical application of RxJS or similar libraries for managing asynchronous data flow
  • A proven track record of developing robust integrations using various techniques: REST/SOAP APIs
  • Scraping (e.g., using Puppeteer, Cheerio, or similar tools)
  • An analytical mindset with a strong ability to debug complex, distributed systems and resolve data synchronization issues
  • Ability to manage projects end-to-end, prioritize tasks independently, and drive integration projects to completion
  • Excellent communication skills (English is required) and experience working effectively with cross-functional, international teams
  • A passion for the travel industry and a desire to contribute to a rapidly growing, international product
What we offer:
  • Competitive salary, stock options, Alan health insurance, and Swile card
  • Unlimited coffee, tea, snacks, and drinks

Additional Information:

Job Posted:
February 17, 2026

Work Type:
Hybrid work
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