Software Engineer Intern @ Webscorer Inc.
- Developing a real-time Android GPS map and tracking module with the Google Maps API, delivering 1Hz location updates.
- Recording and displaying racer route, and supporting full race replay functionality.
Hi, my name is
Altti Koskinen.
Applied & Computational Math Sciences student at the University of Washington, currently building real-time GPS tracking at Webscorer Inc., with skills in full-stack development, data science, and machine learning.
01. About
I'm pursuing a B.S. in Applied and Computational Math Sciences at the University of Washington, with minors in Applied Math, Data Science, and Informatics. I love building projects that turn math and data into things people can use.
A few technologies I've been working with:
- Python
- C++
- Java
- TypeScript
- SQL
- PyTorch
- FastAPI
- React
- Node.js
02. Experience
Undergraduate Course Assistant @ UW Department of Mathematics
- Course assistant for Math 207 (Differential Equations), holding weekly lab hours and guiding students through course concepts and homework.
- Proctored and graded midterms and finals throughout the quarter.
- Planned and led review sessions to support student exam preparation.
Data Science Extern @ Outamation
- Implemented a mortgage document pipeline in Python using PyMuPDF and Tesseract OCR to extract text from 40+ page PDFs, parsing 15+ loan fields into JSON.
- Benchmarked open-source LLMs for document classification and field extraction, evaluating latency and accuracy.
- Built an end-to-end RAG system using LlamaIndex, BM25, Mistral, and Gradio with hybrid retrieval, query expansion, and chunk reranking, improved Precision@5 by 37.5% from a base LLM.
AI and Machine Learning Intern @ Helping Hands Corporation
- Built a job matching engine focused around people without access to higher education.
- Optimized the matching pipeline with a PyTorch Sentence Transformer using hyperparameter tuning and cosine similarity, boosting Recall@10 by ~15%.
- Deployed a FastAPI backend serving the recommendation model via POST/GET endpoints.
Full-Stack Developer @ Husky Coding Project
- Built a music discovery platform using React, Spotify Web API, OAuth 2.0, and MongoDB with a six-member team.
- Development focus: SongMatch, a real-time search to build an example song pool, that then curates a similarity-based playlist with 50+ songs.
- Engineered RESTful API integrations for direct Spotify playlist creation.
03. Things I've built
Cloud Radiative Effect Deep Learning Research
Jan 2026 – Mar 2026
Worked with ESS graduate students to build a CNN climate model in PyTorch predicting longwave and shortwave Cloud Radiative Effect from global sea surface temperature patterns using CMIP CanESM ensemble data. Engineered an end-to-end pipeline for NetCDF preprocessing, dataset concatenation spanning 250 years, and CRE derivation, training a model with average skill score of 91.14% across 275M+ data points.
- PyTorch
- NetCDF
- CNN
- Climate Science
Conversational Chrome Extension
Dec 2025 – Feb 2026
Built a Tutor and Mock Interview Chrome extension with JavaScript, scanning current tab data for context, with a FastAPI backend delivering real-time conversation using Kokoro for TTS audio generation. Used Llama 3.2 to generate responses, hosting a server handling real-time voice processing and response generation — a fully offline conversational agent achieving ~15s response times.
- JavaScript
- FastAPI
- Llama
- TTS
GIF
Spectral Simulation of 2D Vortex Dynamics
AMATH · Scientific Computing
Solved the 2D vorticity–streamfunction form of the Navier–Stokes
equations on a periodic grid using an FFT spectral method and
solve_ivp time integration. Simulated colliding
vortex pairs, like- and oppositely-signed vortices, and a
turbulent field of many interacting vortices — rendered as
animations.
- NumPy
- SciPy
- FFT / Spectral
- Fluid Dynamics
PDF
The Dynamics of Love through Mathematics
Written Paper · Differential Equations
A paper modeling romantic relationships as coupled systems of differential equations. Explores how feedback between partners' feelings produces stable, oscillating, or runaway dynamics, with phase-plane and stability analysis of the resulting fixed points.
- ODEs
- Dynamical Systems
- Stability Analysis
PDF
PyTorch CNN Manual
Technical Manual · Deep Learning
A from-scratch instructional manual walking through building and training convolutional neural networks in PyTorch — covering tensors, convolution and pooling layers, the training loop, loss and optimization, and practical tips for getting a model to converge.
- PyTorch
- CNNs
- Deep Learning
Go To Class!
DubHacks 2025
A mobile app that gamifies class attendance with a weekly leaderboard among friend groups. Built with Expo React Native and a Firebase backend for auth and data, turning showing up to class into a friendly competition with streaks and rewards.
- React Native
- Expo
- TypeScript
- Firebase
Exploratory Data Analyses
Data Science
A growing collection of end-to-end EDA notebooks spanning topics like AI & productivity and education & career success. Each walks through cleaning and preprocessing, univariate to multivariate analysis, and visualization-driven conclusions.
- pandas
- seaborn
- scikit-learn
- Jupyter
NBA Clutch Win Predictor
R · Shiny App
An interactive Shiny app analyzing 39,900+ clutch shots since 1996–97 to study who performs under pressure and how it shifts win probability. Visualizes shot efficiency, per-game win-prob impact, and how attempts and experience relate to clutch success.
- R
- Shiny
- Statistics
- Data Viz
What's next?
Get in touch
I'm always open to new opportunities and I love building and solving problems. Whether you have a role in mind or just want to chat, my inbox is open.
Say hello