Somnio Software in La Rioja, Argentina, is looking for a Senior Full Stack Engineer to join its growing team. The role involves working on complex web applications and modernizing legacy codebases while collaborating with backend developers using Node.js and MongoDB. The ideal candidate should have over 5 years of experience, a strong emphasis on frontend development using AngularJS 1.9, and excellent English communication skills for smooth collaborations in international Agile teams.