Staff Engineer, Experimentation platform

As a Staff Engineer for Data Infrastructure, you will define and guide the long-term technical direction for Vinted’s experimentation capabilities and the broader data platform foundations that support them. You will enable teams to roll out impactful changes quickly and safely, run experiments reliably at scale, and use trusted data to make better decisions and learn from experiment results.

Your primary focus will be the end-to-end architecture of Vinted’s Impact Platform — including feature flags, rollout controls, targeting, experiment assignment, exposure and event pipelines, metric foundations, SDKs, governance, and developer experience. Alongside this, you will help shape the wider data infrastructure these capabilities depend on, ensuring they evolve as a coherent, reliable, and scalable platform across Vinted.

Reporting to the Director of Engineering for Data Infrastructure, you will work closely with other Staff Engineers, Engineering Managers, and teams across the domain and broader organisation to align technical direction, drive platform evolution, and raise the engineering bar.

Think you’re up to the challenge? Read on.

• Own the long-term technical vision for Vinted’s experimentation capabilities, including feature flags, rollout controls, targeting, and the data foundations behind them.
• Define a cohesive end-to-end architecture for reliable experimentation at scale, spanning feature flags, experiment assignment, exposure and event pipelines, metrics, reporting, and the broader data platform integrations these capabilities depend on.
• Set engineering standards for platform APIs, SDKs, schemas, data contracts, observability, privacy, and access management.
• Lead high-impact cross-team technical initiatives, clarify architectural trade-offs, and raise engineering standards across the domain.
• Partner with internal users and stakeholders to gather feedback, drive adoption, and ensure the platform solves real user needs.
• Represent Data Infrastructure within the Staff / Principal Engineer layer, helping steer key technical priorities, architectural trade-offs, and execution direction.

• Extensive prior experience as an architect, principal, or staff engineer, having delivered cross-team platform or infrastructure initiatives in organisations operating at scale.
• Strong architectural judgment across data platforms, experimentation systems, feature flags, and platform engineering, with the ability to connect technical decisions to a broader domain strategy.
• Hands-on understanding of modern data platform architecture, including orchestration, ingestion, storage and table formats, analytics and BI tooling, governance, privacy, access control, and observability.
• Practical experience shaping hybrid on-prem / cloud architectures, with a solid understanding of cloud economics, platform cost trade-offs, and vendor lock-in mitigation.
• Experience with experimentation platforms, feature flags, metrics frameworks, product instrumentation, or analysis and reporting automation would be a strong advantage.
• Demonstrable ability to create technical vision in ambiguous environments and turn it into clear architecture, standards, and execution direction across multiple teams.
• Ability to delegate refinement and implementation of technical initiatives to engineers in your organisation while remaining close enough to the architecture to provide meaningful guidance.
• Sharp communication skills and an ability to discuss complex technical topics with engineers, product and data stakeholders, and leadership, building alignment and consensus across domains.
• Excellent written and spoken English.

• 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
• Mental and emotional health support through the Mindletic app
• 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
• 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

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 the 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.