Me

Hi!

My name is Jeff Jonasson. I'm a developer

working at Mpya Digital in Stockholm.

I'm a positive and driven person who enjoys working with technology and to solve problems. Preferably a combination of them both. As a developer I've mostly been working with web development, both within front-end and back-end.

My preferred way of working is in agile cross-functional teams which allows the feedback-loops to be very short and to productivity to be very high. Together you have a good overview of the project and the end-product is as close to the goal image as possible.

Experiences

Tele2 - Invoice and usage

Played a crucial part of a dynamic team that handled everything with invoices and usage on web for both Tele2 and Comviq. My time at Tele2 allowed me to demonstrate technical expertise while honing leadership and mentoring skills. The main project was to build the new whitelabel techstack for Comviq which all brands in the future will be based on. Some of the technologies used: React, Node.js, Typescript, Jest, Scrum, Azure DevOps, Cypress, REST, GraphQL, NX, Micro-frontends, Kibana, Contentful.

Klarna - Working with sponsored placements in the Klarna app

Fullstack developer at Klarna. Integrated the Klarna app with third-party services, built ad placements, and created app components. Later joined the App Feed team and helped transform a Proof of Concept into a production-ready state. Here, my expertise in ad placements in the Klarna app became invaluable to the team. Some of the technologies used were: React Native, Node.js, TypeScript, JSON, Jest, Scrum, AWS, Redis, Datadog, and Splunk.

Rocker - New banking app

Front-end developer tasked to rebuild the Rocker App from the ground up and bring the company's feature offerings to the next level. Since it was a small team a lot of creative liberty and decision-making was given to the team members. Also tasked with releasing and maintaining the company’s websites for different products. Including implementing a re-design and launching a marketing campaign for one of them. The technologies used were mainly React Native, Gatsby, Typescript, Apollo and Google Cloud.

Svea Bank - Company bank site and Onboarding site

Part of a front-end team which developed two projects within the bank. Those were the company bank site and a site on which a company could become a customer in the bank. Both were built with React and redux from the ground up.

Colive - Membership platform MVP

Full-stack developer in a cross-functional team which developed an MVP membership platform for the start-up Colive. The site was built using React, Node and PostgreSQL to accommodate all needs.

Save by Solar - Facilitiy motitoring site

Full-stack developer on a Solar energy start-up in Uppsala. The site was created for the customers of Save by Solar so they could easily overview interesting data about their solar facilities. The focus was on visualisations and simplicity. It was built using Vue, Node and MongoDB.

© Jeff Jonasson, 2024