Freelance Full-Stack Developer Jukka Hyytiälä

Projects

Projects

Financial sector: Credit Decision Support System (1 year, continues) 

I worked in one of the largest financial companies in Finland. I was in a team that was responsible to implementing new features to one of the company’s most important systems.

In addition of being a full-stack developer I worked also as a Scrum Master. In that role, I was also responsible for fixing production issues and managing releases. The project was very large, up to 8 teams working on it so the release process was a little complicated even with automatic CI/CD pipelines.

• I refactored a decision tree like form that nobody was able to understand any more. No-one wanted nor could add new branches to it as it’s logic was simply too complicated. I took that task, so I refactored it and added new branches later. Adding these new branches had also a tight deadline set by regulation and a huge penalty if we were late.

Key technologies: JS/TS, React, Node.js, SQL Server, T-SQL

Soft Skills: Leading a distributed team, Remote working

DVV: Interoperability platform (1 year) 

Together with my team, I was responsible for maintaining the five applications of the Digital and Population Data Services Agency. The most important job was to reprogram the front-end of one application together with a junior developer from our team.

I guided and ensured the work of our team’s junior developer and enabled their development. As a more experienced programmer, I was responsible for fixing difficult bugs, finalizing the result and reaching quality goals. I also made a comprehensive documentation of my work for DVV.

Key technologies: TypeScript, React, Next.js, styled-components

Soft Skills: Leading a distributed team, Remote working

Oima: Payroll system (6.5 years) 

My work at Oima (now part of Visma) included several tasks. Here are a few examples of effective solutions I have implemented:

• I made an integration into an invoicing application Procountor which is then used to export invoicing details automatically. Earlier it was a manual process that cost 25,000 EUR/year. 
• I made a feature that allowed the user to bypass the automatic payroll calculation. It was used to fix a huge amount of issues and unexpected use cases by payroll specialists. It saved years of everyone’s time. 
• As a team leader, I coached my team from zero to the most successful development team in the company. My architectural decisions and careful planning allowed juniors to perform and grow. After half a year, no one was a junior anymore. 
• I made a GDPR feature that allowed a user to download their personal information. It was made in a hurry as someone has already used their right to get access to their personal information. 

Key technologies: JavaScript, React, PHP, Symfony, MySQL

Soft Skills: Leading a distributed team, Remote working