Kia Ora, Hola, สวัสดี, Guten Tag WhereTo began as a San Francisco-based business travel startup and has since evolved into an agile development and design studio within the Flight Centre Travel Group family. Our mission is simple: to make business travel better for everyone. We provide an AI-powered platform that transforms corporate travel. Using machine learning, it tailors personalized travel recommendations based on traveler preferences, company policies, and budget. Our technology also offers real-time travel tracking, reporting, and cost analysis, helping companies optimize their travel programs and reduce expenses. To learn more about WhereTo, click HERE About The Opportunity WhereTo (now part of Flight Centre Travel Group) is looking for a passionate, motivated and skilled Back End Engineer to join our growing Engineering team. This is an exciting opportunity to be an integral part of the team leading the return to travel and work with some of the largest and most powerful travel programs in the world. We are looking for a self-motivated team player who is also willing to mentor others and contribute to our culture of engineering and operational excellence. Key Responsibilities Creating high quality user-focused software while working in a cross-disciplinary fast-moving team. You will partner with product-leaders to shape the future of the platform. You will help define, implement, and reinforce architectural and implementation best practices. You will build pipelines that handle billions of transactions per day. You will live and breathe asynchronous I/O and Typed JavaScript and horizontal scalability. Experience & Qualifications 6 years of professional software development experience (internships and personal projects not included). 2 years experience with Node.js. Experience with building and architecting high quality software from scratch. Strong JavaScript skills (ES6, Babel) – experience with TypeScript and/or FlowType is a bonus. Strong understanding of asynchronous I/O. Excellent software architecture skills and a passion for maintainable, organized code. Experienced with AWS, EC3, S3, RDS, CloudFront/CDNs. Expert with Linux, Ubuntu/Debian (Bash scripting a plus). Experience with CI platforms (Jenkins, CircleCI, Travis, etc.). Experience with REST-based Web Service API implementation. Experience with MySQL/PostgreSQL (or similar) and understanding of how they work internally. Experience with Algorithms and Data Structures. Experience with NoSQL databases is desirable (i.e. MongoDB, Cassandra). Experience with memory cache systems (Redis, Memcached). Experience with other systems programming languages is a bonus (Go, C/C++, Rust, etc.), and/or scripting languages (Python) and/or JVM-based languages (Scala, Java, Groovy). Experience with pure functional programming and/or functional programming libraries and concepts is a bonus (Haskell, Scala, F#, Ramda, Lo-Dash FP, etc.). Strong experience in designing and implementing highly horizontally-scalable architecture. Strong understanding of Git fundamentals. Here’s what you can look forward to at WhereTo: If you're based in Barcelona, you'll have access to our fantastic central office located in the heart of the city at Plaça Catalunya. Access to our rooftop terrace with table tennis, and a fully stocked kitchen with snacks, fresh fruit, and drinks. Free language lessons in English, French, Spanish, or Catalan. A competitive package: 25 vacation days 5 additional compensation days reduced summer hours bank holidays. Comprehensive health insurance. Flexible working hours. If you sign a contract and start with us on or after November 1st, you may be eligible for a €2,000 sign-on bonus The chance to work alongside a talented, international team. Fun activities and events organized by our team ambassadors LI-LR1WTOLI-Remote <