Bolt is a leading European "super-app" for mobility, offering ride-hailing, car-sharing (Bolt Drive), e-scooter/e-bike rentals, and food/grocery delivery across 50+ countries and 600+ cities. It provides affordable, on-demand transportation as an alternative to private cars
My role is designing, building, and maintaining core systems within the Billing domain to ensure invoices are properly fiscalized and compliant with country-specific tax regulations. Building scalable, reliable services that integrate with external governmental authorities and regulatory platforms across global markets.

Zalando is a leading European fashion and lifestyle unicorn, seamlessly merging fashion with advanced technology to deliver highly personalized shopping experiences.
My role was focused on the Backend and Infrastructure in the Pseudonymization team, which operates within the Information Security division. Our team was dedicated to developing and maintaining systems that pseudonymize customer personal identifier information (PII) on a large scale. This is a critical aspect of protecting sensitive data, ensuring compliance with privacy regulations, and minimizing risks related to data breaches. I was responsible for designing, implementing, and optimizing backend systems to handle vast amounts of PII efficiently and securely. I worked closely with other teams in the Information Security department to ensure that our infrastructure was robust, scalable, and in line with the latest security practices.

Delivery Hero is present in around 50 countries across four continents and is on a mission to deliver anything, straight to customers’ doors.
My role was to design and implement a sustainable, scalable backend system of the Location team, provide technical assistance to the team members as one of the engineers who built the team and most of its tools. I also help plan and set the roadmap of the product in the light of the available resources and the general objectives of the worldwide platform.

Rubikal is a Software Engineering house that has been in partnership with InsideTrack, an Academic Coaching Company in Portland, USA, I was working on a number of microservices implemented with various technologies and frameworks, mainly Elixir/Phoenix functional programming language, Ruby on Rails/Sinatra, React, RabbitMQ, and PostgreSQL.

Lynks is a cross-border ecommerce startup based in Egypt. It delivers goods from global online stores to local businesses/individuals in Egypt. I took part in re-designing the whole system from only serving B2C to also support and serve B2B. giving business owners more control over the storage and shipment of their orders. The tech stack was Ruby on Rails, GraphQL, React.