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Hi, my name is Justyna and I'm a

Software Engineer

Studying Immersive Software Engineering

I love building and learning. Anything from websites, neural networks, robots, electronics, games and apps!

Hi, I’m Justyna.

Justyna Przyborska

Dublin, Ireland

Full-stack

2 years of work experience

I’m a full-stack engineer interested in startups, product design, mathematics and AI. Through internships at AWS, Stripe, and Virtu Financial, I’ve built real-world systems ranging from user-facing products to low-latency trading infrastructure, and learned from world-class teams. When I’m not coding, I’m birdwatching, painting, or thinking up the next big idea.

  • Emergent Ventures Winner
  • Attended the first ever YC AI Startup School
  • Awarded the Patch San Francisco Fellowship
  • TreeHacks Finalist (Stanford)
  • HackEurope Participant

1. Virtu Financial

Virtu Financial

Software Engineering Intern
January 2026 - May 2026

Contributed to a high-frequency trading crypto team, building low-latency infrastructure for performance-critical trading systems.

  • Built and shipped performance-critical C++ components for low-latency crypto trading systems
  • Integrated new exchange connections, expanding trading coverage across markets
C++
Linux
Low-Latency Systems
CI/CD

2. AWS

Amazon

Software Engineering Intern
June 2025 - August 2025

Built an operations report generation tool that automated manual reporting processes for Lambda engineering teams.

  • Reduced weekly ops report creation time from 2+ hours to 3 minutes
  • Designed extensible block-based architecture supporting report components
  • Integrated MCP (Model Context Protocol) servers to access internal Amazon systems
Python
AWS Bedrock
MCP Servers
System Architecture
CLI Development

3. Analog Devices

Analog Devices

Software Engineer Intern
September 2024 - December 2024

Completed dual projects focusing on SmartMesh UI redesign and embedded AI research for monocular depth estimation.

  • Modernized decade-old SmartMesh network interfaces using JavaScript, CSS and custom Tkinter
  • Reverse-engineered PyTorch AI model architecture from its weights alone
  • Researched optimizing deep learning models for MAX78000 microcontroller deployment
Python
PyTorch
JavaScript
Tkinter
Embedded Development
C++

4. Stripe

Stripe

Software Engineer Intern
June 2024 - August 2024

Enabled PayTo as a Dynamic Payment Method and integrated it into Stripe Checkout and Payment Links.

  • Supported real-time payments for Australian customers
  • Wrote end-to-end tests in TypeScript
  • Collaborated with Payments team on API design
React
TypeScript
Ruby
Sorbet
Git

5. ULCES

UL Consulting and Entrepreneurship Society

Web Developer
September 2023 - May 2025

Developed a promotional website for the consulting and entrepreneurship society.

  • Designed a responsive and modern website
  • Deployed it statically on GitHub
HTML
CSS
JavaScript
Visily

6. IEEE Robotics

IEEE Robotics Society

Student Branch Member
September 2024 - May 2025

Participated in competitive robotics projects and international competitions as part of university robotics team

  • The team won the International Robotics Championship in Malta with our battle-bot Bris
  • Dicussed underwater robot control and computer vision systems for aquatic robotics
Robotics
Embedded Systems
Computer Vision
OpenCV