Senior Backend Engineer, AI Listing platform

Brief info about Vinted 

Vinted Marketplace is the largest online international C2C marketplace in Europe dedicated to second-hand fashion, with millions of registered members spanning 20+ markets in Europe and North America. With a mission to make second-hand the first choice worldwide, Vinted enables people to sell and buy second-hand clothes and lifestyle items from each other, helping give those items a second or even third life.   

Vinted Go launched in 2022,  with a focus on developing products and solutions for more seamless shipping and delivery across Europe. Vinted Go has connected more than 40 carriers and more than 200,000 PUDO points across Europe to support the delivery of millions of parcels per year.  

The Vinted Group, composed of Vinted Marketplace and Vinted Go, is headquartered in Vilnius, with workplaces in Germany, Lithuania, France, the United Kingdom, the Netherlands and over 2,000 employees. It is backed by six leading venture capital firms: Accel, Burda Principal Investments, EQT Growth, Insight Partners, Lightspeed Venture Partners, and Sprints Capital. 

Information about the position 

We are looking for a Senior Backend Engineer to join AI Listing platform team within the Supply domain. AI Listing platform team is responsible for improving the listing experience and enriching listing metadata with the help of machine learning and AI. As a backend engineer, you will be responsible for designing, building and scaling a service that leverages internal and external large language/convolutional ML models to understand our content better. You will be working alongside data scientists, responsible for the modelling side of things. This is a high-impact role where your work will directly contribute to the success of our AI-powered features and help shape the future of listing experiences on our platform.

In this position, you’ll 

• Work in a cross-functional team of backend engineers and data scientists to build AI-powered features that enhance the experience of listing millions of items every week on our marketplace.
• Design, implement, and maintain a robust backend service that processes user-uploaded listings.
• See your code affect 80+ million users almost instantly. Our master branch gets rolled out straight to production on each merge. We deploy many times per day.
• Collaborate closely with Data Scientists and product teams to integrate computer vision and LLM-based models (using both external APIs and in-house infrastructure).
• Collaborate with other developers through GitHub pull requests and code reviews.
• Write unit tests (RSpec) for all of the code you write.
• Ensure reliable data validation, inter-service communication, and API performance optimization.
• Apply Agile and Lean principles in your work, participating in planning, retrospectives, and other ceremonies.
• Effectively partner across teams to prioritize and deliver results.
• Own your service end-to-end: from system architecture and design to deployment, observability, and performance tuning. Monitor system performance using tools like Prometheus, Grafana, and Kibana.
• Work with Ruby on Rails, MySQL, Vitess, Memcached, Elasticsearch, Java, Scala, Rust and write streaming applications on top of Apache Flink. We don’t expect you to be familiar with all of them beforehand.
• Own SLIs/SLOs in the product team.
• Participate in on-call rotation every 5-6 weeks to ensure our systems stability.

About you 

• You have solid experience designing, building, and operating backend services in production.
• You are comfortable working with REST/gRPC APIs, asynchronous data pipelines.
• You’re excited about working at the intersection of AI and product, and delivering real value to millions of users.
• Experience with integrating AI models (external API-based or in-house LLMs) in production/MLOps experience is a strong plus.
• You have hands-on experience with container orchestration tools like Docker and Kubernetes.
• You’re pragmatic, product-minded, and value clean code and good architecture.
• You enjoy working collaboratively in a team, giving and receiving feedback, and helping others grow.
• You are willing to learn and master new technologies and concepts
• You are a good communicator who can talk clearly about complicated topics both with business people and engineers
• You are capable of working in the team as well as independently, taking the lead in addressing issues and driving improvements, even without explicit direction
• Experience working in a fast-paced startup or product-focused environment is a bonus.

Work perks 

• The opportunity to benefit from our share options programme
• 25 working days of holiday
• Newest MacBook models
• Free access to an office gym
• Mental and emotional health support through the Mindletic app
• 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 discount 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

Working at Vinted 

Individual Learning Budget

We invest in your professional growth! As part of our commitment to continuous learning, we offer an annual learning budget to support your personal and career development through courses, certifications, workshops and more.

Hybrid Work 

We’ve adopted a hybrid workplace model where 2 days in office are recommended but not enforced. It’s up to you and your team to decide on the exact days you’ll spend working together in person.

Equal Opportunity

The Vinted Group is committed to building an inclusive workplace where people from all walks of life feel a sense of belonging. We welcome applications from people of all backgrounds, identities and life experiences. At Vinted, all applicants are treated fairly without regard to their race, age, religion or belief, sex, national origin, citizenship, gender identity, sexual orientation, disability, or any other protected characteristic.

The salary range for this position is € 4975 - € 6725  gross per month.