Big North Company Ltd is the UK-registered company for the freelance work and independent software projects of Gemma Black, Software Engineer based in the UK but travels quite a bit to Spain.
This repository acts as a central index for consulting work and side projects developed under the The Big North.
Full Stack Developer
London, United Kingdom
Worked on high-impact digital platforms with a focus on scalable back-end infrastructure and responsive front-end applications.
Key Technologies:
Front End Developer
London Area, United Kingdom
Delivered front-end features and custom WordPress builds, collaborating closely with designers and server-side developers.
Key Technologies:
Melimundo helps travellers and digital nomads plan and track travel days across the Schengen Area under the 90/180-day rule. It supports multi-entry trips and provides a visual timeline. Additional tools include a 183-day residency calculator and visit tracker.
UpOscar is a side project by Gemma Black that provides free investment profit calculators to help track gains and losses on trades made outside tax-wrapped accounts.
It supports FIFO, LIFO, and Weighted Average methods for stocks and options across multiple brokerages and currencies. While not a tax preparation tool, it’s built to assist international taxpayers in monitoring realised gains throughout the year.
- 📊 Stocks FIFO Calculator – First in, first out method for gains/losses
- 📉 Stocks LIFO Calculator – Last in, first out method
- ⚖️ Stocks Weighted Average Calculator – Pooling method support
- 🧾 Options FIFO & LIFO Calculators – For long and short options
- 🗓️ General Trading Calculator (in progress)
- 📥 Interactive Brokers Import Tool (in progress)
- 🌍 Multi-currency support (planned)
- 🔒 No logins, no data stored – calculators are free to use with strong privacy principles
If you'd like to work together or want to learn more, feel free to connect on LinkedIn.
