Hi, Kasper here. 👋
Software developer from Sweden 🇸🇪
I have an AI assistant too
— it loves to talk about me.
Jan. 2025 - Jun. 2025
SARSYS ASFT
Data & ML Engineer (Thesis Collaboration)
- Built a Python ETL pipeline to ingest and unify heterogeneous data from MSSQL & MySQL, processing 500k+ sensor logs for analysis.
- Condensed the dataset size by 90% by architecting cleaning scripts to purge duplicate and null rows.
- Engineered a time‑series alignment algorithm to merge asynchronous weather data with irregular friction events.
- Developed a Hybrid LSTM-XGBoost architecture (Ensemble Learning), benchmarking performance alongside standalone models to reveal that critical target sparsity (friction measurements) was a limiting factor, identifying structured data collection as a prerequisite for the company's future ML initiatives.
Sep. 2024 - Jan. 2025
RentalBuddy
Full Stack Developer (Internship)
- Took ownership of technical delivery for a 5-person intern team, organizing sprint workflows and guiding architectural decisions to deliver key milestones 2 months ahead of schedule.
- Built the core Node.js/TypeScript API using TDD, implementing custom aggregation logic for high‑volume booking history.
- Unblocked the deployment pipeline by diagnosing data inconsistencies in the cloud mock database that bypassed TDD.
Featured Projects
AI-Enhanced Language Learning Platform
An app focusing on helping users to get started learning new languages.
PythonFastAPIPostgreSQLStrawberry (GraphQL)SQLAlchemy ORMPostgreSQLGCPDockerGithub Actions (CI/CD)Expo (React Native)TypeScriptZustandFirebase Auth
Relay Server
A concurrent Go relay server implementing a client-as-host game architecture with lobbies and matchmaking. It uses goroutines for massive connection handling and Protocol Buffers (Protobufs) for efficient data serialization. This design provides a scalable, low-cost solution by leveraging client resources for game simulation.
GoProtobufsGoroutinesTCP/IP