Vinted

Senior Backend Engineer, Trust & Safety

Vinted
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1 day ago
Kaunas, LithuaniaSenior

Responsibilities

  • Design and build backend services for counterfeit detection.
  • Identify emerging counterfeiting patterns and develop new detection capabilities.
  • Own complex projects from ideation through production, including RFCs and architecture decisions.
  • Build reliable, observable, and cost-aware AI and LLM-based capabilities.
  • Collaborate with data and decision scientists to improve detection and models.
  • Measure shipped solutions for accuracy and fairness to legitimate sellers.
  • Mentor engineers and raise engineering and agentic development standards.

Requirements

  • Proven experience designing, building, and operating production ML- and data-driven backend systems with Go, Ruby, or Python.
  • Experience with event-driven systems.
  • Understanding of data, machine learning, and LLMs, including model training, evaluation, and retraining.
  • Ability to work with data and decision scientists and use data to inform decisions.
  • Demonstrated ownership of complex, ambiguous problems and technical decisions.
  • Ability to make and explain pragmatic trade-offs between abuse detection and protecting legitimate sellers.
  • Curiosity about applying AI and LLMs to counterfeit detection.
  • Experience with BigQuery, Vespa, or Temporal is advantageous.

Benefits

  • Share options programme.
  • 25 working days of holiday.
  • IT workstation equipment and up to €540 for home workplace furniture.
  • Private health insurance and a pension plan with flexible contributions and employer matching.
  • Employee Assistance Program for employees and families.
  • Team-building events, a monthly Vinted shopping budget, and dog-friendly offices.
  • Additional office-specific gym, meal, and lunch benefits in Vilnius and Kaunas.
  • Hybrid work with two recommended office days per week.
  • Workation policy allowing remote work for up to 90 days per year in the EU, including up to 21 days globally, with separate terms for non-EU citizens.
  • Annual learning budget starting at €3,000 and up to 10 working days over two years for development.

Tech Stack

GoGoogle BigQueryPythonRuby
Vinted

About Vinted

1,001-5,000 employees

Vinted runs a consumer-to-consumer marketplace and app for buying and selling second-hand fashion and related items across Europe. It monetizes through transaction-related fees, buyer protection, and shipping services, and also operates Vinted Go for logistics and Vinted Pay for payments. Founded in 2008 and headquartered in Vilnius, Lithuania, the platform serves members in 20+ European markets.

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