Lead Backend Engineer, V-Assist Platform

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 a Lead Backend Engineer 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.

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.

• 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.

• The opportunity to benefit from our share options programme
• 25 working days of holiday
• Newest MacBook models
• Free access to an office gym
• Digital mental and emotional health support and Employee Assistant Program (EAP)
• Home office support: we provide IT workstation equipment and a personal budget of up to 540 for home workplace furniture
• Private health insurance
• On-site canteen serving delicious homemade food at friendly prices
• Frequent team-building events
• A personal monthly budget for shopping on Vinted
• The opportunity to spend up to 90 days per year - 21 of which can be spent working outside of the EU - on workation
• A dog-friendly office