Senior Full Stack Engineer (Python + React) — Martailer

At Martailer, we’re building a modern retail media platform. Our software powers omni-channel advertising for some of Europe’s largest retailers, serving millions of ads every single day across online stores, mobile apps, and in-store media.

We are a team of professionals who own their work. Everyone here is self-driven, independent, and takes pride in building things that actually work at scale. We don’t micromanage. We don’t handhold. We trust each other to get things done.

Now, we’re looking for a Senior Full Stack Engineer to join us in our Vilnius office.

• Design, build, and scale features across our platform using Python (backend) and React (frontend).
• Own problems end-to-end — from architecture and implementation to testing and deployment.
• Work closely with product and data teams to turn complex requirements into clean, performant solutions.
• Contribute to improving our engineering culture, code quality, and technical direction.

• Strong experience with Python and React.
• Solid understanding of systems design, APIs, and databases.
• Someone who thrives in an environment of independence and responsibility.
• Clear communication, straightforward thinking, and a focus on delivering results.

• Build real, enterprise-scale software used daily by leading European retailers.
• Work on systems that handle millions of ad impressions across multiple channels.
• Join a small, skilled team where your work makes an immediate impact.
• Professional, independent culture — no fluff, no babysitting, no bureaucracy.
• Competitive compensation (5000-9000 EUR Gross depending on your experience), flexibility, and the chance to grow with a company that’s scaling fast.

If you’re a senior engineer who enjoys solving hard problems without being told how to do it every step of the way, Martailer is a place where you’ll feel at home.