Callista
Nils Janson is a seasoned technology professional with extensive experience in engineering management and software development. Currently serving as a Consultant at Callista since January 2025, Nils previously held positions as Engineering Manager at Einride and Lifesum, where responsibilities included evolving back-end services and overseeing engineering quality. Prior roles at Klarna involved enhancing code delivery infrastructure and leading teams on product development, while earlier positions at Nordstrom and Expeditors International included managing teams and solving technical problems. Nils began a career in software development with roles at Loudeye Corp, Network Commerce, Enea Data AB, and Ericsson Telecom AB. Nils holds a Master's degree in Materials Engineering from Uppsala University.
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Callista
We are consultants with technical expertise in IT Architecture, Open Source Technology, Agile Development and the Java Platform. We work in exciting and strategic projects, where we help our customers maximize return on IT investment by using leading edge technology. We offer a complete ran ge of services to establish, implement and maintain mission critical IT Systems. The company was founded in 2000, and is 100% employee owned. IT Architecture is our core business. Every consultant at Callista is an experienced IT architect and/or a proficient senior developer. We offer expertise in Cloud Technology & Microservices, Frontend, Technology Transition and e-Health.