Mikołaj Szawerda Software Engineer

About Me Projects

My Expertise

Hi! I’m Mikołaj, a Software Engineer II and a student at Warsaw University of Technology, with a passion for music. My professional journey includes an internship at Allegro and Bridgestone and a current position as a Software Engineer II at Box. I’ve worked on large-scale real-time collaborative apps, streaming big data systems, and backend-for-frontend microservices. My technical expertise encompasses Java, DevOps, Kubernetes, Kafka, Spring, and React. Alongside my engineering roles, I’ve competed in coding competitions, securing 1st and 3rd place in the Best Hacking League and 2nd place in the Ensemble AI Hackathon. Academically, I'm focusing on machine learning for music and audio explainability and generative music models.
Thanks for stopping by!

Mikołaj Szawerda

Software engineering

Proficient in Java, Spring Framework, and Node.js for robust application development especially for large-scale real-time collaborative content creation products. Product-minded in making useful software. Knowledgeable in design patterns, TDD, DDD, and microservices for scalable solutions.

DevOps and BigData

Apache Kafka Google Cloud

Skilled in DevOps with Kubernetes for application deployment and architecture, ensuring scalability. Proficient with GCP systems like Pub/Sub, Dataflow, and Bigtable for data pipelines, with some experience in Kafka for streams.

ML and Data science

Active in machine learning research and data science projects focused on music and audio, applying PyTorch in university work. Solid mathematical background with strong algorithms focus. Aiming to utilize statistical models for data-driven insights.

Featured Projects

musicgen activations
Featured Project

MusicGen Lens

MusicGen Lens enables a totally new way of controlling generative music models beyond prompts by collecting activations with nnsight and applying activation-level interventions (DiffMean, RFM, SAE) for interpretability and steering.

  • Python, PyTorch, nnsight
  • Activation collection, interpretability
GitHub
parcel tracking system

Parcel Tracking System

Microservices parcel tracking system (Spring/Java) with carrier integrations, tracking history in database, search, periodic updates, and event-driven services.

Java Spring Microservices Kafka Docker
GitHub
chat application

ChatUp

Java Spring + JavaFX messaging app with channels/DMs, real-time chat via RabbitMQ, Elasticsearch full-text search, JWT auth, and PostgreSQL backend.

Java Spring RabbitMQ Elasticsearch PostgreSQL
GitHub
live polling dashboard

Quicpolls

Real-time survey app for events with QR-code access and live dashboards, built in React/TypeScript with Supabase (PostgreSQL).

React TypeScript Supabase PostgreSQL
GitHub
python icon

P2P Torrent System

Python P2P torrent system with coordinator service, client/file server, chunked transfers, and Dockerized networking.

Python Networking Docker Distributed Systems
GitHub
terminal spreadsheet

Console Spreadsheet

Python console spreadsheet (Excel-like) with cell addressing, formulas over ranges, live recalculation, and CSV load/save.

Python CLI CSV Data Structures
GitHub
c++ icon

Design Patterns (C++)

C++ implementations of classic software design patterns focused on clean architecture, extensibility, and maintainable backend code.

C++ Design Patterns OOP Architecture
GitHub
dna annotation

DNA Variant Annotator

DNA variant annotation platform for splicing analysis with REST API core, worker services for SNV/INDEL processing, and optional UI.

Java REST API Bioinformatics SNV/INDEL
GitHub
thermal tracking visualization

Thermal-Guided Rocket

Thermal-guided rocket project using Raspberry Pi, infrared camera input, servo control, and real-time heatmap visualization and tracking.

Embedded Raspberry Pi C Computer Vision
GitHub
lorenz attractor

Lorenz Attractor

C++ OpenGL visualization of the Lorenz attractor with real-time animation of chaotic trajectories and 3D rendering.

C++ OpenGL Simulation Visualization
GitHub
unity ar multiplayer

AR Quiz

Unity AR multiplayer game for Android/iOS using Cloud Anchors and Firebase for shared anchors and real-time sync.

Unity ARCore Firebase Multiplayer
neural style transfer

Real-Time Style Transfer for Games

Research on real-time neural style transfer for games using Unity integration, G-buffer guidance, distillation, and quantization for fast inference.

Deep Learning Unity Style Transfer Optimization
GitHub
diffusion model

Stable Diffusion

PyTorch diffusion model with UNet architecture and Lightning training for image generation on custom datasets (traffic images).

PyTorch Diffusion UNet Lightning
GitHub
music embeddings

MusicSAE

Sparse autoencoders for unsupervised music representation learning on MusicGen/RAVE/YuE activations, producing interpretable audio embeddings.

Python SAE MusicGen Representation Learning
GitHub
musicgen activations

MusicGen Lens

MusicGen Lens enables a totally new way of controlling generative music models beyond prompts by collecting activations with nnsight and applying activation-level interventions (DiffMean, RFM, SAE) for interpretability and steering.

Python MusicGen nnsight Interpretability
GitHub
music programming language

Music Programming Language

Interpreter for a custom music programming language with lexer/parser/AST, static typing, and MIDI import/export.

Java Compiler MIDI PL
GitHub
dj console

DJ Console

C++ DJ console built with JUCE for real-time audio playback, multi-track mixing, effects (EQ/reverb/delay), tempo sync, and playlist control.

C++ JUCE Audio DSP
GitHub
audio plugin tooling

Venom (Python JUCE)

Python JUCE bindings (via pybind11) for building VST3/AU audio plugins, enabling rapid DSP prototyping with C++ build tooling.

Python JUCE VST3 pybind11
GitHub
musicgen research

MusicGen Steering Thesis

Thesis on steering MusicGen with textual inversion for controllable music generation and interpretability.

MusicGen Interpretability ML Research
GitHub
warehouse optimization

BHL 2023 - Magazyn 4.0

Hackathon project “Magazyn 4.0” (3rd place, BEST Hacking League): warehouse optimization platform with FastAPI websockets, React Native barcode app, React dashboard, and MongoDB analytics.

FastAPI React Native MongoDB Hackathon
GitHub
voice travel agent

Pocket Travel Agent

Pocket Travel Agent hackathon app with ElevenLabs TTS, multi-language voice UX, AI trip planning (Perplexity + Mistral), and integrations with Google Maps and OpenMeteo via Make.com workflows.

ElevenLabs React TypeScript AI Agents
GitHub
ml security

Ensemble 2024

Ensemble 2024 hackathon solution for ML security tasks (Sybil attack + model stealing) with Python notebooks, dataset utilities, and submission pipelines.

Python ML Security Model Stealing Hackathon
GitHub
pytorch icon

Ensemble AI 2025

Ensemble AI 2025 hackathon codebase with PyTorch pipelines for image embedding regression (task2) and adversarially robust classification (task3), plus notebooks and evaluation scripts.

PyTorch Adversarial ML Embeddings Hackathon
GitHub