
Jan Sültemeyer
Verified Expert in Engineering
Full-stack Developer
Munich, Bavaria, Germany
Toptal member since February 14, 2022
Jan is an experienced full-stack software engineer with a track record of delivering high-quality software and a particular interest in data-heavy projects. He was part of the team building BMW's cloud-native data lake and recently worked as a lead engineer in a team building a trading platform based on a state-of-the-art tech stack. Jan is looking forward to learning opportunities for new projects and is experienced in handling large amounts of data, the React ecosystem, and the AWS cloud.
Portfolio
Experience
- Python - 7 years
- Software Development - 6 years
- Cloud Architecture - 3 years
- TypeScript - 3 years
- Terraform - 3 years
- Serverless Architecture - 3 years
- React - 3 years
Availability
Preferred Environment
Python, React, TypeScript, Serverless Architecture, Amazon Web Services (AWS), AWS Lambda, Cloud Infrastructure, Full-stack
The most amazing...
...product I've worked on is the Cloud Data Hub, BMW's cloud-native data lake in the AWS cloud.
Work Experience
Full-stack Developer (React and Python) | Financial Platform
OptionScout
- Led the development of an options trading platform. Discussed goals and priorities with the client and defined a suitable state-of-the-art tech stack based on React/Next.js, Python, and AWS. Helped evolve the architecture based on new requirements.
- Implemented the app's core and helped team members be productive via pair-programming and code reviews.
- Increased the codebase's quality gradually by refactoring convoluted code, adding automated tests, converting it to TypeScript, and automating checks and deployments, balancing development speed and code quality.
- Took care of the infrastructure and operational stability to help the team focus on delivering new features.
Full-stack Software Engineer
BMW
- Built BMW's data portal, a web application that lets users explore and work with data stored in the Cloud Data Hub, BMW Group's cloud-native data lake.
- Led a team composed of nine engineers as part of my role.
- Played a key role in prioritizing features with product owners, planning their development, and assisting the team with the implementation.
- Helped build data pipelines and ETL jobs in AWS Glue and analytics workflows in AWS SageMaker and QuickSight.
Data Scientist | Data Engineer
Freelance
- Built a dashboard for the TetraPak sales organization that showed actionable insights generated by our machine learning model.
- Founded a small consulting company with fellow students and completed a few freelance projects.
- Built a data processing pipeline aggregating data from various sources using Microsoft Azure big data services.
Data Scientist | Data Engineer
Birkle IT
- Built and maintained a data warehouse feeding BI dashboards for a large insurance company.
- Created ETL scripts to load data from two applications into the data warehouse and ensured they ran reliably on a schedule.
- Oversaw and ran a data migration project to move data from a database of a legacy application to a new one replacing it.
- Created reproducible and robust workflows using Docker.
- Helped with a few fixes to the back end of the main application built in Node.js and Express.js.
Simulation Engineer
IABG
- Ran detailed numerical simulations on large Linux clusters. Simulated fluid flow in cylinder heads.
- Interpreted simulation results by crunching numbers stored in large files with bash and python scripts. Visualized large amounts of data with various plots and 3D models.
- Oversaw long-running processes on multi-node compute clusters and optimized resource utilization.
Experience
Pyne Studio Online Shop
https://pyne.studioThe code is available on my GitHub page: github.com/sltmyr/pyne-studio.
Cloud Data Hub | Data Portal
https://data.bmwgroup.com/https://aws.amazon.com/solutions/case-studies/bmw-group-case-study/
Generative Neural Network for Flow Simulation
https://github.com/sltmyr/FluidAnimationsDeconvNets/blob/master/flow-generation-deconv-nets.pdfOptionScout | Stock Options Trading Platform
https://optionscout.comEducation
Master's Degree in Computational Science and Engineering
Technical University of Munich (TUM) - Munich, Germany
Bachelor's Degree in Engineering Science
Technical University of Munich (TUM) - Munich, Germany
Certifications
AWS Certified Solutions Architect – Professional
AWS
Skills
Libraries/APIs
React, Node.js, PySpark, TensorFlow
Tools
Terraform, OpenFOAM, Cluster, Auth0
Languages
Python, TypeScript, JavaScript, GraphQL, HTML, SQL, Bash, CSS
Paradigms
Serverless Architecture, DevOps, ETL
Platforms
Amazon Web Services (AWS), AWS Lambda, Linux, Amazon EC2, Docker
Storage
PostgreSQL, Amazon S3 (AWS S3)
Frameworks
Express.js, Next.js, Cypress
Other
Software Development, Cloud Architecture, AWS Cloud Architecture, Visualization, APIs, Architecture, System Architecture Design, Cloud Infrastructure, Server Infrastructure, Full-stack, Machine Learning, Data Science, Gatsby, Dashboards, Data Warehousing
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