ROKAS STASIULIS

Develops product features for Vinted (marketplace with 300M+ users) across digital wallets, identity verification (KYC/KYB), and payment-related flows across multiple regulatory environments. Works on internal tooling for fraud prevention, AML-related processes, and administrative operations, including migrating legacy systems to modern React and TypeScript architectures. Builds growth experiments such as A/B tests and localized feature rollouts in collaboration with product managers and decision scientists. Leverages AI-assisted workflows (primarily Claude) to improve development efficiency and code quality, and participates in cross-team knowledge sharing. Contributes in an Agile team to technical decisions, code reviews, automated testing, and engineering best practices, collaborating with backend engineers, designers, and decision scientists.

Built custom e-commerce solutions for clients using the UltraCart platform by extending existing capabilities to create tailored shopping experiences. Implemented store front customizations, dynamic cart functionality, upselling/cross-selling, and interactive checkout components to meet business requirements. Delivered conversion optimization work including client-side experiments, dynamic purchasing flows, and custom transactional email templates while integrating with existing e-commerce systems to reduce checkout friction and improve customer retention.

Developed architectural concepts and computational design solutions for international projects using parametric modeling and automated workflows. Created parametric models and automation processes to manage complex geometries, constraints, and iterative design tasks, improving flexibility and efficiency across project development. Translated architectural ideas into detailed spatial/geometric solutions and collaborated with multidisciplinary teams to balance design goals, technical requirements, and project constraints. Tools included Revit, Dynamo, BIM, and computational design automation.