Senior Software Engineer (AI)

TL;DR

Senior Software Engineer (AI): Developing high-scale backend systems for yield management in a programmatic research marketplace with an accent on high-traffic processing and AI/ML model integration. Focus on designing complex systems, optimizing data structures, and implementing model libraries like XGBoost or CatBoost.

Location: Remote (Spain)

Company

hirify.global is a pioneer in research technology (ResTech) providing a programmatic marketplace that enables customers to gather insights from millions of respondents globally.

What you will do

• Build high-quality backend services for a product used by millions of users daily.
• Design and implement complex systems capable of handling unconventionally high traffic.
• Collaborate with a team of top-level engineers to deliver a world-class product.
• Focus on rigorous code quality and timely delivery in an environment where stability is critical.

Requirements

• 5+ years of professional backend software development experience.
• Strong proficiency in Java or a willingness to switch to Java from C++, C#, Go, or Python.
• Deep expertise in Data Structures and Algorithms.
• Experience with AI/ML development model libraries such as XGBoost, LightGBM, or CatBoost.
• Must be based in Spain.

Nice to have

• Experience with AWS and Kubernetes.
• Knowledge of Kinesis, SQL, and Spring.

Culture & Benefits

• Supportive and collaborative culture that values shared success.
• Results-focused environment that avoids corporate politics.
• Recognized as one of Newsweek’s 2025 Global Top 100 Most Loved Workplaces®.
• Opportunity to work within a global platform with teams across multiple continents.