Senior Backend Engineer — Global Payments & Scale

Whatnot; Kraków; Remote; PLN 150,000 - 230,000; Full time

Job summary

Whatnot, the largest live shopping platform, seeks a Senior Backend Engineer based in Poland. You will design and build highly scalable distributed systems supporting millions of transactions across multiple countries, partnering with product, operations, payments, logistics, and platform teams.

You will help expand our international footprint with focus on Germany, France, and the UK, working with cross-border infrastructure, tax compliance, and post-purchase experiences while improving buyer

Qualifications

• 5+ years of professional software engineering experience.
• Strong backend engineering experience in distributed systems or large-scale platforms.
• Experience designing, operating, and scaling reliable production services.
• Experience working with relational databases and event-driven architectures.
• Ability to drive projects independently from ambiguous problem statements to production launch.
• Excellent communication skills and ability to collaborate across engineering, product, operations, and business stakeholders.

Skills

Distributed systems

Backend engineering

Relational databases

Python or Go

Communication skills

Independent project execution

Job description

Whatnot, the largest live shopping platform, seeks a Senior Backend Engineer based in Poland. You will design and build highly scalable distributed systems supporting millions of transactions across multiple countries, partnering with product, operations, payments, logistics, and platform teams.

You will help expand our international footprint with focus on Germany, France, and the UK, working with cross-border infrastructure, tax compliance, and post-purchase experiences while improving buyer