Senior Software Engineer

8/2023 – 1/2025

Tech Stack: TypeScript, Node.js, Go, Kafka, AWS, CDK, Vitest, Backstage, Handlebars

Product Detail Page Development
- Participated in the development of the product detail page, adding new features for thousands of daily customers, such as customer feedback based size recommendations for clothing.
- Responsible for the general system stability of the most visited page of the OTTO webshop.
- Reduced customer review data fetching time for the product detail page by 50%.

Transformation of Customer Reviews
- Migrated a 10+ years old Java monolith for customer reviews to a 20+ microservices architecture using TypeScript and Go, ensuring data consistency and zero service interruption between legacy and new systems.
- Established a monorepo for shared code, type definitions, and Infrastructure as Code, and simplified deployment pipelines by replacing Jenkins with streamlined GitHub Actions.
- Switched from MongoDB to PostgreSQL, enabling real-time updates of relational data like product or retailer information.
- Migrated from REST/SNS to Kafka, consuming up to over 100 million daily external updates and allowing our consumers to receive customer review updates in real time.
- Developed infrastructure for Gen-AI use cases by setting up open-source LLMs for internal analysis and data extraction.

Amazon Web Services (AWS), Apache Kafka, Cloud Spezialist, Golang, Software Architecture, Typescript

4/2022 – 3/2023

Played an instrumental role in planning, implementing, testing, and deploying Pricenow's E-Commerce solution. Contributed to various aspects of project management, including daily standups, sprint planning, and retrospectives. Developed and integrated numerous features, focusing on architectural cohesion, full-stack tasks, and continuous improvement of the platform.

Completely refactored the payment and refund system, streamlining the process and migrating to a new data scheme that enables a customer's payment history to be traced in a more transparent way. Designed a robust, easily extendable system with a predefined interface for integrating new payment providers.

Tech-Stack: Next.js, Node.js (REST, Express), TypeScript, RabbitMQ, Postgres+Prisma, Auth0, Sentry, Sanity, Jest, Datatrans, AWS, Azure, Github Actions, Microservices, JIRA, Confluence

Amazon Web Services (AWS), Confluence, Jira, Microsoft Azure, Node.Js, Postgresql, React (JavaScript library), Sentry, Typescript

3/2022 – 3/2022

Revamped Empion's matching algorithm, resulting in a performance improvement of 3 orders of magnitude. Provided strategic technical consultation and recommended next steps in terms of tech to achieve the company's objectives.

Typescript