Senior Backend Engineer - GenAI (Python / Kotlin)

At OLX, we work together to build a more sustainable world through trade.

We make it safe, smart, and convenient to buy and sell cars, find housing, get jobs, buy and sell household goods, and more. Our colleagues around the world help to serve millions of people every month through our well-loved consumer brands including OLX, Otodom, and Property24.

Join OLX and see how far you can go.

JOIN OLX GENERATIVE AI INNOVATION ENGINEERING TEAM

This role is based in Spain.

We seek a Senior Backend Engineer to join our newly established Generative AI Innovation team and help drive AI innovation at OLX.

Our team is at the forefront of GenAI-powered solutions, developing cutting-edge services to enhance user experiences, optimize internal processes, and explore new business opportunities. You’ll work on scalable, high-impact AI projects, collaborate with cross-functional teams, and contribute to research, proof-of-concepts, and production-ready AI applications.

If you’re passionate about AI, love problem-solving, and want to shape the future of AI-driven innovation, we’d love to hear from you!

As a Senior Engineer on our team, you'll collaborate closely with fellow engineers, SREs, the product team, data scientists, and an engineering manager while building one of the company's newest distributed systems. Our systems are built using Python, Kotlin, or Golang and run on AWS.

We value engineers who have:

• Significant professional experience in software development with Python (preferred) or Kotlin
• Experience in large-scale web applications, an economic-thinking mindset, and the ability to design well-bounded domain systems
• Experience in architecting Cloud Native solutions, AWS is a plus
• Worked in multi-functional teams
• Believes in 'you build it, you run it, you own it,' ensuring high-quality code, debugging, optimization, and automation as key priorities.
• Experience in building AI / ML-enabled products

What you will be doing:

• Leading the planning, execution, monitoring, and completion of projects, ensuring timely delivery and adherence to quality standards
• Contributing to complex technical projects, ensuring robust, secure, and scalable software solutions.
• Mentoring and guiding junior engineers, fostering a collaborative and productive work environment. This includes delegating tasks, providing feedback, and facilitating team communication
• Driving innovation by encouraging new ideas, shaping software development, and collaborating closely with product management to create user-centric solutions
• Developing and deploying cloud-native solutions using GitLab CI / CD to AWS, contributing to broader engineering strategy and cross-team collaboration
• Creating impact outside of your team by helping drive the Engineering strategy and contributing to cross-team collaboration through inter-team working groups or community guilds, among others

Our hiring process:

• Recruiter screening
• Engineering Manager interview
• Live Coding interview
• System Design part

What we’ll give you:

• Competitive salary and an annual bonus (15%)
• Training and conference budget and free access to Udemy courses
• 100% remote work (as well as the possibility of working from our office in Barcelona)
• Newest equipment to make your work easier
• Health & dental insurance, gym membership, and language courses (Spanish and English), and much more to make your life easier

Diversity, Equity and Inclusion at OLX

OLX values diversity and welcomes applicants of all races, ethnicities, disabilities, ages, genders, sexual orientations, religions, backgrounds, and experiences to apply. If this role excites you, we encourage you to apply, even if you don’t meet all the requirements - you may be just the right fit for this or other opportunities with us!