Lead Backend Engineer, V-Assist Platform

Brief Info About Vinted Our mission is to make second-hand the first choice, and we're looking for people who want to help us get there. Every day, we work together to help our members buy and sell pre-loved clothing and lifestyle items, giving each piece a second life – or even a third.

The Vinted Group is made up of three business units that support this mission:

Vinted Marketplace is Europe’s leading platform for second-hand fashion and a go-to destination for all kinds of pre-loved items, with a growing range of categories. Our platform connects millions of members across 20+ markets, helping great items find a new life.

Vinted Go enhances the shipping experience with a vast network of over 500,000 pick-up and drop-off points, partnering with more than 60 carriers across Europe, with added services like item verification for peace of mind on high-value pieces.

Vinted Pay is the newest part of the Vinted Group, dedicated to bringing secure, reliable payments to buyers and sellers across Europe. Seamlessly integrated into the Vinted app, it helps keep every transaction safe, efficient, and easy for our members.

Founded in 2008 in Lithuania, Vinted began as a way for friends to find new homes for clothes they no longer needed. In 2019, we became Lithuania's first unicorn! Today, our headquarters remain in Vilnius, and we've grown with offices across Europe, supported by a team of over 2,000 people.

Information about the position

V-Assist is Vinted’s internal AI assistant designed to reduce operational overhead by making it easy to find information, navigate systems, and handle routine tasks. Following a successful beta with over 1,000 users, V-Assist is now evolving into a core AI platform for engineering productivity, data discoverability, and back-office self-service. We are forming a dedicated team within the Data Infrastructure domain and hiring Senior and Lead Backend Engineers to drive this and help us scale V-Assist's impact across every corner of Vinted.

Whether you are an experienced Senior Engineer looking for your next challenge or a Lead Engineer ready to shape a major internal platform, we want to hear from you. The description below focuses on Lead-level responsibilities, but we are hiring for both roles. Think you’re up to the challenge? Read on.

In this position, you’ll

• Lead the design of V-Assist’s core agent framework
• Design and implement secure, auditable agentic workflows with impersonation controls.
• Optimize indexing pipelines to ensure the LLM always has the most relevant and up-to-date context from across the company.
• Partner with Staff Engineers and stakeholders across Engineering, Product, Design and DSA to turn high-level visions into executable technical roadmaps.
• Develop a multi-agent workspace where humans and AI work together to solve complex, cross-domain problems.
• Design self-improvement loops using feedback to continuously refine the platform’s accuracy and performance.
• Mentor IC2 and IC3 engineers, conducting high-impact code reviews and ensuring high engineering quality across the team.

About You

• Deep proficiency in Python, Ruby or Go, with a strong grasp of distributed systems, concurrency.
• Proven track record of building and scaling complex backend systems in high-ambiguity environments.
• Pragmatic architect who balances long-term stability with the need to take "smart" technical debt to move fast.
• Familiar with GenAI and RAG, and excited about the challenge of applying these technologies safely at an enterprise scale.
• Strong communicator who can lead technical discussions and drive alignment across the team and broader organization.
• Supportive mentor who takes pride in sharing knowledge and helping other engineers grow.

Work perks

• The opportunity to benefit from our share options pro