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Sr Machine Learning Engineer - Fintech Foundation (100% Remote - Spain)

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Huelva, Andalucia, España
Hopper
05.08.2025
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Sr Machine Learning Engineer - Fintech Foundation (100% Remote - Spain)

Hopper Madrid, Community of Madrid, Spain

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Sr Machine Learning Engineer - Fintech Foundation (100% Remote - Spain)

Hopper Madrid, Community of Madrid, Spain

Join to apply for the Sr Machine Learning Engineer - Fintech Foundation (100% Remote - Spain) role at Hopper

About The Job
Hopper is continually redefining how people travel, combining a best-in-class travel agency with a portfolio of proprietary fintech offerings that give our customers peace of mind when booking travel. More than 100M monthly active users are exposed to our products through our mobile app and a growing list of partners such as CapitalOne, Air Canada, and Spirit Airlines. With a real-time feed of 50B+ priced itineraries daily along with more than ten years of history and multiple external data sources, we have unparalleled insight about pricing and demand trends.

About The Job
Hopper is continually redefining how people travel, combining a best-in-class travel agency with a portfolio of proprietary fintech offerings that give our customers peace of mind when booking travel. More than 100M monthly active users are exposed to our products through our mobile app and a growing list of partners such as CapitalOne, Air Canada, and Spirit Airlines. With a real-time feed of 50B+ priced itineraries daily along with more than ten years of history and multiple external data sources, we have unparalleled insight about pricing and demand trends.
This is a unique opportunity to join our growing Fintech Foundation team. We’re responsible for optimizing pricing for all ancillary products we sell, balancing customer demand with the financial risks we take on. We help our product teams deliver new fintech products to market faster, respond rapidly to changing market conditions, run continuous champion-challenger testing on product construction levers, and maintain our growing portfolio of pricing models across dozens of partners.
As a ML engineer you will play a key role in growing our fintech business through delivering and operating innovative pricing solutions at scale across dozens of partners.
What Would Your Day-to-day Look Like

  • Implementing automated, reusable ML training pipelines.
  • Build data ETL pipelines including appropriate feature engineering
  • Develop and deploy ML real-time pricing solutions to production.
  • Monitor and optimize for low-latency and minimal training/serving skew.
  • Collaborate with data scientists, engineers and product stakeholders to define and implement relevant solutions.
An Ideal Candidate Has
  • Strong development skills in Python, Scala, SQL.
  • Deep understanding of ML algorithms and frameworks like pandas, sklearn, flyte, TensorFlow etc
  • Familiarity with data modeling, software architecture and distributed data processing tools.
  • Strong analytical and problem solving skills, with attention to detail.
  • Excellent communication and collaboration skills.
Perks and benefits of working with us:
  • Well-funded and proven startup with large ambitions, competitive salary, upsides of pre-IPO equity packages.
  • Hopper covers the cost of employee premiums for private medical and dental coverage.
  • Hopper also offers private life and accident coverage.
  • Please ask us about our very generous parental leave, much above industry standards!.
  • Access to co-working space on demand through FlexDesk AND Work-from-home stipend.
  • Unlimited PTO.
  • Hopper offers a monthly cash allowances for gym memberships and to cover home-office expenses for a comfortable remote working experience.
  • Carrot Cash travel stipend.
  • Entrepreneurial culture where pushing limits and taking risks is everyday business.
  • Open communication with management and company leadership.
  • Small, dynamic teams = massive impact.
More About Hopper
At Hopper, we are on a mission to become the leading travel platform globally – powering Hopper’s mobile app, website and our B2B business, HTS (Hopper Technology Solutions). By leveraging massive amounts of data and advanced machine learning algorithms, Hopper combines its world-class travel agency offering with proprietary fintech products to bring transparency, flexibility and savings to travelers globally. We have developed several unique fintech solutions that address everything from pricing volatility to trip disruptions – helping people travel better and save more on their trips.
The Hopper platform serves hundreds of millions of travelers globally and continues to capture market share around the world. he Hopper app has been downloaded over 120 million times and has become largely popular among younger travelers – with 70% of its users being Gen Z and millennials.
While everyone knows us as the Gen Z and Millennial travel app, Hopper has evolved to become much more than that. In recent years, we’ve grown into a travel fintech provider, commerce platform, and global travel agency that powers some of the world’s largest brands.
Through HTS, our B2B division, the company supercharges its partners’ direct channels by integrating our fintech products on their sites or powering end-to-end travel portals. Today, our partners include leading travel brands like Capital One, Nubank, Air Canada, and many more.
Here are just a few stats that demonstrate the company’s recent growth:
Billions of dollars worth of travel and travel fintech are sold through Hopper and HTS’ channels every year.
Our fintech products – including Cancel for Any Reason and Flight Disruption Assistance – have exceptionally strong CSAT because the terms are always clear, and customers receive instant, no-questions-asked resolutions.
Almost 30% of our app customers purchase at least one fintech product when making a booking; and consumers are 1.6x more likely to repurchase if they add fintech to their booking vs if they booked just travel.
Given the success of its fintech products, Hopper launched a B2B initiative, HTS (Hopper Technology Solutions), which represents more than 75% of the business.
Through HTS, any travel provider (airlines, hotels, banks, travel agencies, etc.) can integrate and seamlessly distribute Hopper’s fintech or travel inventory on their direct channels. As its first HTS partnership, the company partnered with Capital One to co-develop Capital One Travel, a new travel portal designed specifically for cardholders. Other HTS partners include Air Canada, Uber, CommBank, Nubank, Flair Airlines and many more.
Hopper has been named the #1 most innovative company in travel by Fast Company Hopper has been downloaded over 120 million times and continues to have millions of new installs each month. Hopper is now the #3 largest online travel agencies in North America and 70% of our app customers are Gen-Z and millennials travelers.
Hopper has raised over $750 million USD of private capital and is backed by some of the largest institutional investors and banks in the world. HTS is primed to continue its growth as the leading travel ecommerce provider in a $1 trillion online shopping category. The Hopper app and website will also continue to be the preferred travel provider for Gen Z and Millennials..
Come take off with us!
Compensation Range: $150K - $330K
Seniority level
  • Seniority level Mid-Senior level
Employment type
  • Employment type Full-time
Job function
  • Job function Engineering and Information Technology
  • Industries Software Development

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