Senior Backend Engineer, Vinted Pay

We're searching for a Senior Backend Engineer to join Albatross, the User Journey team in Vinted Pay. We are the front door to Vinted Pay: Albatross owns how millions of Vinted members become verified users - onboarding, balance activation, identity verification, duplicate account detection, offboarding and the whole account lifecycle.

We're in early stages still. We're launching new markets and migrating millions of users from external payment providers, so the systems we build now are the ones that will carry Vinted Pay for years. We're rebuilding our core flows as durable Temporal workflows and migrating our main Ruby service to Go - there's real architectural work here, not just feature delivery.

Problems arrive ambiguous. Engineers here aren't handed specs - they work out what's actually needed together with product and compliance, align it across teams, and build it.

• Work in a team of 5-6 backend engineers, engineering manager, product manager and decision scientist.
• Build account, KYC, and verification flows in Ruby and Go, and orchestrate them as durable Temporal workflows across services.
• Own topics end-to-end: from an ambiguous requirement to a written proposal, cross-team alignment, implementation, and monitoring in production.
• Work in AI-assisted way: agentic coding tools (Claude Code, Codex and others) are part of the daily workflow here - for building, debugging, investigating production issues, and writing docs. We expect you to use them well and make the team better at it.
• See your code affect millions of users almost instantly. Our main branch gets rolled out straight to production on each merge. We deploy many times per day.
• Work with diverse tech stack: Go and Ruby languages, AWS cloud infrastructure, MySQL, OpenSearch, Redis, Kafka, Temporal, Prometheus, Grafana. We don't expect you to be familiar with all of them beforehand, but we expect you will be excited to learn them fast.
• Write unit tests for all of the code you write and contribute to integration and E2E test writing and its usage.
• Take ownership of critical alerts and business metrics for your team to ensure our services achieve 99.99% availability.
• You will participate in on-call rotations to ensure our product performs well.

• You take ownership of features and projects from start to finish, you break problems down so others can tackle them too - not just you.
• You navigate ambiguity well - given a vague requirement, you extract the real need, propose a solution with trade-offs, and drive it to agreement.
• You think like a product engineer - you ask why before how, question requirements that don't make sense, and care about what the user and the business actually get - not just that the ticket is closed.
• You know at least one language deeply and you're comfortable with API design, caching, and system architecture. Experience with Ruby and/or Go is a significant advantage.
• You are a pragmatic problem solver - you think practically, choose the best solutions, avoid over-engineering, and prioritize simplicity.
• You document what you build - proposals, RFCs, ADRs - so the next person doesn't have to reverse-engineer your thinking.
• You care about observability and monitoring - if something breaks, your team shouldn't be flying blind.
• You are fluent with AI tooling and agentic workflows - you use them consciously to multiply your output and you raise the team's level with what you learn.
• You have excellent written and spoken English.

Nice to have

• Advantage: you have experience in payments, fintech, KYC/AML, or another regulated domain.

• The opportunity to benefit from our share options programme
• 25 working days of holiday
• Access to all the tools & tech needed for work
• Home office support: we provide IT workstation equipment and a personal budget of up to 540 for home workplace furniture
• Private health insurance
• Confidential Employee Assistance Program (EAP) for you and your family
• Frequent team-building events
• A personal monthly budget for shopping on Vinted
• A dog-friendly office
• In Vilnius office: Gym & in-house meals at friendly prices
• In Kaunas office: a monthly lunch allowance, and a once-a-week provided in-house lunch and breakfast