Software Engineer - Full Stack JS (H/F)

About the position As a Software Engineer - Full Stack JS, you will be responsible for the technical design, implementation and optimization of our SaaS applications. Within this position, the development will mainly be focused on JavaScript technologies. 💌 Your daily missions will include: Integrate a feature team working with lightweight development workflows, requiring a high-level of autonomy and a strong sense of ownership Work closely with the Splio’s front guild to ensure best practices are applied across the teams and our stack follows the market trend Work closely with Product/UI/UX team to implement the designed user friendly components Managing performance of a real-time web application displaying a high density of data Contribute daily to all parts of our application’s code base : code review, test, architecture design, release, and monitoring ⇒ “You Build It, You run It” Constantly interface with the teams involved in the project to ensure a high-quality product is continuously deployed Stack : Languages : Javascript, TypeScript Framework/Lib : ReactJS, NodeJS, Material UI, NestJS, GraphQL Data : BigQuery, ElasticSearch, PostGres Dev Env : Docker, Gitlab, Gitlab CI Hosting : GCP Tech (80%) Contribute to the overall engineering at Splio Contribute to the development with your team Proactively ensure that security, reliability, performance and cost-efficiency are included in technical and architectural discussions Keep up to date with the latest relevant technologies, continually evaluating their use for Splio Leadership (20%) As a Software Engineer, you provide guidance, allow teams to discover and learn independently. Actively question decisions and provide guidance and own experience to ensure no stone is left unturned and risks are identified and highlighted Collaborate with other teams when necessary for the product you’re building Additional information : The assignment will take place in our brand‑new offices located on Carrer Roger de Llúria in Barcelona, where a team of about thirty multilingual colleagues is already in place. The Engage team is based in Paris, so an initial training period in France before departure will be planned, at our Paris offices located near Opéra. You will of course not be left on your own — you will have a technical point of contact in Paris as well as a local point of contact in Barcelona. At the end of the VIE assignment, the objective is to transition into a permanent position (CDI), either in Paris or in Barcelona. Splio will contribute to the housing allowance. Recruitment process: 1 HR interview (30 minutes) 1h interview with the manager and a team member This VIE assignment offers a unique opportunity for rapid professional and personal growth. Through the tasks entrusted to you, you will gain hands‑on experience in an international environment, develop strong operational skills, and build autonomy in a dynamic, fast‑moving team. Working daily with multilingual colleagues in Barcelona while collaborating closely with the Paris team will also deepen your cross‑cultural communication abilities and broaden your understanding of different ways of working. This international exposure will allow you to expand your perspective, strengthen your adaptability, and accelerate your career development in a truly global context