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# Senior Fullstack Developer / Tech Lead

- **Company:** Amaris
- **Location:** Laza, Spain (Remote available)
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Microsoft Azure, Cloud Database, Cloud Engineering, DevOps, Monitoring of Systems, Key Management, Microsoft Software, OpenAI, Software Engineering, Cloud Platform System, Retrieval-Augmented Generation, System Availability, Large Language Models, Backend, Deployment Automation, Performance Monitor, Cosmos DB, Front End Software Development, Serverless Computing
- **Published:** October 10, 2026
- **Apply:** https://www.buscojobs.com.es/senior-fullstack-developer-tech-lead-en-laza-ID-374792875

## About the Role

You will be the technical reference and hands-on lead , coordinating a cross-functional squad (AI Engineers, Full Stack Developers, DevOps) to design, build, and operate Azure-based RAG and AI solutions that power internal products and services across the business.
? Senior profile - solid experience in software/AI engineering in complex environments (junior profiles will not be considered).
Proven experience as a Technical Lead / Tech Lead for AI or software engineering squads , ideally up to 6 engineers.
Experience designing and building scalable backend systems and APIs in cloud environments , preferably Microsoft Azure .
RAG & LLMs (Azure OpenAI or similar) Solid knowledge of Azure services such as: Azure Functions, App Services Cosmos DB or other cloud databases Azure Key Vault Azure OpenAI / cognitive services Experience with observability, reliability, and performance monitoring of production systems (logs, metrics, alerts, dashboards).
Strong collaboration and communication skills , acting as the technical interface between the squad and stakeholders (Product Owner, Data Scientists, frontend teams, business).
Comfortable working in international, multicultural environments and in English-first contexts.
Design and oversee the development of scalable backend systems and APIs that support AI products on Azure .

## Description

Join Amaris Consulting and work on projects that impact thousands of users worldwide.Be part of an international team, grow in an agile environment, and develop your career within a global group that values innovation, collaboration, and talent.As a Senior Tech Lead - RAG , you will lead one of our internal Retrieval-Augmented Generation (RAG) squads within our AI Factory in Barcelona.You will be the technical reference and hands-on lead , coordinating a cross-functional squad (AI Engineers, Full Stack Developers, DevOps) to design, build, and operate Azure-based RAG and AI solutions that power internal products and services across the business.? Senior profile - solid experience in software/AI engineering in complex environments (junior profiles will not be considered).Proven experience as a Technical Lead / Tech Lead for AI or software engineering squads , ideally up to 6 engineers.Experience designing and building scalable backend systems and APIs in cloud environments , preferably Microsoft Azure .RAG & LLMs (Azure OpenAI or similar) Solid knowledge of Azure services such as: Azure Functions, App Services Cosmos DB or other cloud databases Azure Key Vault Azure OpenAI / cognitive services Experience with observability, reliability, and performance monitoring of production systems (logs, metrics, alerts, dashboards).Strong collaboration and communication skills , acting as the technical interface between the squad and stakeholders (Product Owner, Data Scientists, frontend teams, business).Comfortable working in international, multicultural environments and in English-first contexts.Design and oversee the development of scalable backend systems and APIs that support AI products on Azure .~ Architect and validate cloud-based AI solutions leveraging Microsoft technologies: Azure Functions, App Services, Cosmos DB, Azure Key Vault, Azure OpenAI, and related services.~ Act as the technical point of contact for the squad, collaborating closely with Product Owners, Data Scientists, frontend developers, and business stakeholders.~ Define and monitor system performance, reliability, and observability standards, ensuring high availability of AI deployments.~ English: Mandatory.Spanish: French: Nice to have, as many stakeholders operate in a French-speaking environment.70% of our senior leaders started in junior positions.Continuous learning: access to our Technology Academy, Udemy courses, webinars, and company-funded certifications (including AI and cloud).Flexibility: remote work options, flexible working policies, and social benefits (meal vouchers, transport, childcare support, private health insurance, etc.).Personal development: annual training budget to grow both your hard and soft skills.We welcome all qualified applications regardless of gender, sexual orientation, race, ethnicity, age, or any other characteristic.