Freelance jobs Developer / Programmer Cloud Technologies in Barcelona

We are looking for 2 senior Full-Stack Engineers to join our team. You will be part of the Seller Experience squad, a team dedicated to providing top-tier support and tools to sellers operating on the marketplace. The team's main components are the back-office, which enables sellers to run their daily business, as well as the Salesforce suite and the admin-staff, used by our internal Sales team to manage and communicate with the seller pool. The team is currently composed of 2 front-end engineers, 3 back-end engineers, 1 support specialist, 1 Salesforce engineer, 1 designer, 1 PM, and 1 EM. Freelance Budget: 420EUR Bacelona Híbrido Solicitudes abiertas hasta el 26 de Septiembre Mission As a member of the Technology Office, your mission will be the end-to-end development of a project aimed at extracting the features currently hosted in Salesforce and rebuilding them either in the seller back-office or in the admin-staff. Responsibilities Work closely with the PM, designer, EM, and business team to: Understand the business needs behind the current Salesforce features Identify pain points related to these features Define migration requirements Learn the business domain Collaborate closely with the Salesforce developer, IT support, and EM to: Understand the current implementation of the Salesforce features Determine potential fallback mechanisms to replicate information in Salesforce Ensure other teams are not impacted Integrate our systems with external systems and third-party applications currently connected to Salesforce Perform data migration and ensure data integrity across our database, BigQuery, and Salesforce when necessary Replicate and improve if needed the triggered, scheduled, and screen flows currently present in Salesforce and critical to our platform Maintain our code quality and testing standards Work closely with our BE & FE teams to: Understand and follow our standards Understand the current architecture Maintain the Workato automations that trigger Salesforce flows and will need to be migrated into our stack Profile 5+ years of experience as a skilled developer Experience with distributed systems Experience with data migration and integration tools Basic knowledge of infrastructure (AWS/GCP, SQL) and web patterns (CDN, caching, HTTP) Ability to write optimized and performant code Strong testing practices and clean code principles Solid documentation skills Strong analytical and problem-solving skills Excellent communication skills in English, able to adapt to different audiences Curious, proactive mindset with humility and strong team spirit Required Skills Mandatory: Strong expertise in one of the following: Python technologies JavaScript & Vue 3, Nuxt, and TypeScript Knowledge of: SQL APIs CI environments Cloud platforms Messaging & event queues (RabbitMQ & Kafka) Asynchronous architectures Third-party integrations Monitoring tools (Datadog or similar) English Fluent Nice to Have Experience working with JIRA Salesforce experience Low-code development (Workato) Coding experience in Go Organization 2 days/month in Barcelona 6 month rewable (visibility ~ 2y)