Jukka Keinänen, full-stack C# + JavaScript developer with industrial background

I’m a full-stack web developer with a background in automation engineering and Finnish industrial companies. I build production-ready web applications with tools such as C#, JavaScript/TypeScript, ASP.NET, xUnit, Azure, Railway, Entity Framework, Node.js, Next.js/React, MySQL, MongoDB and Docker. Clean code, Lean principles and continuous improvement are foundations of my work.

You can find my work in GitHub or by checking out following links:

• Personal chatbot [Live demo] [GitHub]
  • AI chatbot answering questions about my background
  • Tech: Bun runtime, Vite, React, Tailwind, Express.js, OpenAI API
  • Demonstrates LLM context management, API integration, browser UI, modern JS architecture
• Website for a snooker club [Link]
  • Website for Cabin Street Snooker, a snooker club in Helsinki.
  • Tech: Wordpress, plugins
  • Demonstrates clarity of web design, branding, event calendar, putting users first by delivering a maintainable solution
• Online shop [Live demo] [GitHub]
  • Stand-alone online shop built with Node.js, MySQL
  • Tech: Node.js, Express.js, MySQL, Pug view engine, bcrypt hashing, Helmet
  • Demonstrates REST API, clean code, authentication, npm tooling
• Food-oriented social media application [Live demo] [GitHub]
  • Social media called Hera, allowing users to explore food in a feed based on preferences of location and taste
  • Tech: Next.js, React, MongoDB, mongoose, AWS S3 bucket, Google Geocoding API
• 2D puzzle game Dogebox [Link]
  • Hobby project inspired by puzzle games and Sokoban clones
  • Tech: C#, Unity game engine, Gimp
  • Demonstrates game design, UI/UX design, 2D graphics
• Study about ERP data quality [Link]
  • Thesis on ERP and PDM data quality in Vaisala
  • Demonstrates understanding of ERP processes, data quality principles, Lean

Industry & Engineering Background
Before focusing on software development, I worked at Vaisala and Konecranes in roles closely connected to customer service, ERP systems and quality. My experience includes supplier sourcing and customer service in crane projects (6 years at Konecranes) and assembly of electrical components (3 years at Vaisala). This gave me:

• Strong understanding of business processes in industrial environments
• Experience with SAP (sales orders, purchase orders, invoicing, warehouse transactions, installed base)
• Appreciation for Lean principles and data quality

For more details, please download my CV!

Contact me:
+35845 783 62404
jukka.keinane@gmail.com
[LinkedIn] [GitHub]