Klaas-Tido Rühl
Software Ingenieur & Consultant
Contact Information
Skill Ratings
Programming Languages
Technologies/Frameworks
Curriculum Vitae
14+ years of experience
Professional Profile
Studying pure mathematics, I learned to abstract a given problem, to reduce it to its relevant parameters, and to understand and model complex systems. Together with my studies in theoretical computer science, this has given me an excellent basis for the design of sophisticated and performant software systems and for understanding and analyzing multi-layered processes and requirements. Having extensive experience in application and web development as well as B2C and B2B e-commerce, I can work with many of the most common programming languages and technologies. I quickly find my way around very large codebases and new technologies, have broad experience in identifying leverage points for performance optimizations, and can usually find even the most obscure bug. Being a sociable person and having teaching experience, I can competently coordinate collaborations, manage contact with clients and supervise teams.
Core Skills
- application & web development
- performance analysis & optimization
- B2C & B2B e-commerce
- agile development
- server and database administration
- tech audits & consulting
- project management
- goal-oriented perfectionist
- perceptive and empathic
- direct but careful communicator
- understanding and modeling complex processes
- trained and intuitive capacity of extrapolation and projection
- ample sense of humor
Professional Experience (selection)
Pistor AG – digital development & architecture
Rothenburg, Switzerland
Pistor, the leading trading company for the bakery and gastronomy industries in Switzerland, is developing the B2B marketplace Mercanto. My responsibilities lie with the development of the applications responsible for managing the vast amount of data flowing between the merchants and the web shop.
Key responsibilities:
- design of data structures and algorithms
- design, development and maintenance of frameworks and features
- data and code consistency and refactoring
- performance optimizations
- technical supervision of cooperations with our partner companies
- training and supervision of developers in our team
- bug fixing and troubleshooting
- project management
Key achievements (selection):
- design and development of a generic and extensible validation, import and export workflow that allows efficiently handling multiple import formats
- design, development and optimization of extremely performant import and delivery functionalities for per-merchant and per-customer catalogs
- supervising the gradual transition from prototype to product of our principal data flow application
REFUSiON GmbH – senior developer & project manager
Zürich, Switzerland
As a co-owner of this company, I was mainly responsible for participating in and supervising the development and maintenance of features and performing project management for our Magento e-commerce clients. We prided ourselves in our close collaboration with our clients and our deep understanding of their logistic processes.
Key responsibilities:
- conception and development of new features
- maintenance and optimization of our clients’ server infrastructure
- performance, UX and SEO optimizations
- bug fixing and troubleshooting
- project management
- coordinating the cooperation with our partner companies
- training and supervision of developers in our team
- consulting and tech audits
Key achievements (selection):
- early and successful migrations from Magento 1 to Magento 2 for two major Swiss online stores
- implementation of an extremely fast catalog import (products and categories) for tens of thousands of products
routeRANK Ltd – lead developer
Lausanne, Switzerland
In this startup I helped developing, maintaining, and optimizing a multi-modal travel planning tool.
Key responsibilities:
- development of new features
- server and database administration
- optimization of the routing engine
- research concerning multimodal routing algorithms
- project management
Key achievements (selection):
- conception and implementation of a multimodal routing algorithm for the joint travel of multiple travelers with different departure points
University Education
Ecole Polytechnique Fédérale de Lausanne
Lausanne, Switzerland
Ph.D. studies in mathematics, Marie Curie Fellowship of the European Commission
degree received: Doctor of Science
University of California Berkeley
Berkeley, USA
graduate studies in mathematics, UC Education Abroad Program
Georg-August Universität Göttingen
Göttingen, Germany
studies in mathematics (minor: computer studies)
degree received: Diploma in Mathematics (Diplommathematiker)
Technical Skills
- mathematics
- algebra, category theory, number theory, …
- computer science
- complexity theory, data structures, algorithms, …
- development
- TypeScript, JavaScript, Elixir, PHP, Ruby, Python, SQL, HTML, CSS, …
- frameworks
- Node.js, Magento, Phoenix, Symfony, ReactJS, …
- databases
- PostgreSQL, Cassandra, MySQL, SQLite, …
- server administration
- Linux, CI/CD, Docker, Kubernetes, shell programming, …
Languages
- German
- Mother tongue
- English
- Excellent speaking and writing skills
- French
- Fluent speaking and good writing skills