• 🛠 My areas of specialism are back end development, databases and system design - though I consider myself to be "full stack"
• 🇬🇧 UK based
• 💼 I am open to new opportunities if the right one arises 👀

• 🔠 Languages: TypeScript (professional), Ruby (open source/personal), Python (data)
• 🗄️ Databases: PostgreSQL, ElasticSearch, Redis
• 📖 Frameworks/Libraries: NodeJS (NestJS/NextJS), Rails, React
• 🌩️ Cloud/platforms: AWS, GitHub, HuggingFace
• 👀 Other: Docker, Kubernetes, OpenAI
• 👨‍💻 Development: Neovim (ask me about my setup 🤓), Terminal, Claude

• Ruby/rbs: Ruby type signature language
• Openfoodfoundation/openfoodnetwork: Open source rails app for connecting small-scale food producers with consumers
• Rails/rails: Ruby's top web framework
• Metabase/metabase: Large well-known database client and BI tool
• TrestleAdmin/trestle: Well-known admin framework for Rails
• Codesandbox/codesandbox-client: Online code execution environment

• ruby-lsp-rails-factory-bot: A ruby lsp extension providing hover tooltips, autocompletion and go-to-definition for attributes, traits and factories in factory_bot
• typed_struct: Ruby structs but with type-checked attributes

• awesome-ruby-lsp: A curated list of awesome addons for ruby-lsp

• quince: Dynamic, stateful, react-like framework for web applications, but pages are server rendered and written purely in Ruby
• gloss: A "typescriptification" of Ruby
• crystal_gem_template: A template for writing ruby gems which have native components written in Crystal, for speed and performance

I enjoy solving traditional puzzles with pen and paper, but it's also fun to see if you can get a computer to do it too

• Sudoku solver
• Codewords solver

And I have many more projects in https://github.com/johansenja?tab=repositories