Senior Full Stack Developer – GenAI Platform (Back-end focus) - Freelance

Job description

Daily rate: 300€/day
Project context
-------------------

Project Details

• Location: Barcelona


• Work mode: Hybrid (1\-2 days onsite)


• Start date: ASAP


• Duration: Until end of 2026


• Language(s): English (Mandatory); Spanish or French (Plus)

We are looking for a Senior Full Stack Developer to join our AI products team and contribute to the development of a Multi\-cloud GenAI platform (Azure / AWS / Google), with a primary focus on the Secure GPT service. The role is approximately 90% back\-end and 10% front\-end. The objective is to evolve platform capabilities and ensure secure, scalable, high\-quality implementations aligned with business, technical, security, and regulatory requirements.

Goals and deliverables
--------------------------

Main Responsibilities \& Key Activities

• Design, develop, and enhance features for the Secure GPT service: document understanding, translation, agentic capabilities, web usage, APIs, and automation


• Execute end\-to\-end development activities: study, analysis, technical design, implementation, documentation, testing, and monitoring


• Define and track KPIs to monitor usage and support data\-informed decisions


• Collaborate within an international team and maintain regular communication with the Tech Lead and Product Owner


• Implement solutions compliant with security, regulatory, and internal standards


• Identify and contribute to improvements in processes, automation, and customer service delivery

Requirements

Experience Required

Mandatory Experience

• Minimum 5 years of experience in web application development, ideally within Azure environments


• Back\-end development with Node.js (JavaScript / TypeScript)


• Front\-end development with Next.js / React


• Full ownership of the testing lifecycle: unit tests and end\-to\-end (E2E) tests


• API design, implementation, and operation


• Azure services: App Services, Cosmos DB, Application Insights, monitoring


• DevOps practices: Azure DevOps, CI/CD pipelines


• Fundamentals of Infrastructure as Code (IaC) and automation scripting


• Prompt engineering: drafting, testing, and iteratively improving prompts


• Experience with AI APIs and/or frameworks: OpenAI, Anthropic, Gemini, Azure AI; RAG and agentic/agent\-based capabilities

• Terraform and/or Bicep for infrastructure deployment


• Observability and monitoring tooling


• Background in regulated industries


• Azure and API certifications


• Knowledge of data security and compliance


• Availability for occasional travel to France, Spain, or Portugal

Este anuncio proviene de indeed. Ver anuncio original ↗