Senior Backend Engineer, International Engineering

Whatnot
Krakow
Workplace: RemoteFull timeFunction: Software EngineeringSkills: ["Communication","Collaboration","Independent project execution"]

Build and scale highly reliable backend systems for international live commerce, supporting millions of transactions across multiple countries and regulatory environments. Join the International Engineering team working on cross-border transaction infrastructure, tax and regulatory compliance, post-purchase experiences, and marketplace operational tooling. Design production-grade distributed systems, partner with logistics, payments, and platform teams, and ship features that directly improve buyer trust and seller success.

Loading

Loading job details...

Preparing the role view and application actions.

FursaFursa
Whatnot
Whatnot
3 months ago

Senior Backend Engineer, International Engineering

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 59 minutes agoStatus: Live

Job Summary

Build and scale highly reliable backend systems for international live commerce, supporting millions of transactions across multiple countries and regulatory environments. Join the International Engineering team working on cross-border transaction infrastructure, tax and regulatory compliance, post-purchase experiences, and marketplace operational tooling. Design production-grade distributed systems, partner with logistics, payments, and platform teams, and ship features that directly improve buyer trust and seller success.
Location: Krakow
Workplace: Remote
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Design and build scalable systems that support millions of international transactions across multiple countries and regulatory environments.
  • •Develop cross-border transaction infrastructure and international post-purchase experiences.
  • •Build VAT tooling and seller-facing tax infrastructure for EU and UK markets.
  • •Create cross-border shipping and Delivered Duty Paid (DDP) experiences.
  • •Develop operational tooling and automation, partnering with logistics, payments, and platform teams to enable durable infrastructure.

Key Requirements

  • •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
  • •Strong proficiency in Python or Go
  • •Experience working with relational databases and event-driven architectures
Experience:E-commerceFintechLogisticsMarketplace platformsCompliance systems
Skills:CommunicationCollaborationIndependent project execution
Tech Stack:PythonGoRelational databasesEvent-driven architecturesDistributed systems

Company Brief

Whatnot
Whatnot is a live-stream shopping marketplace connecting sellers and collectors for trading cards, toys, and collectibles. The platform hosts live auctions and interactive streams, enabling creators and small businesses to sell directly to engaged communities.
Industry: Online Marketplaces
Company Size: Large (251 to 1,000 employees)
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series D
Headquarters: United States
Founded: 2019
WebsiteLinkedIn