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Senior Backend Engineer who designs, builds, and operates production-grade Python services and REST APIs that integrate AI/LLM and ML capabilities in a large enterprise environment. Core stack: Python, AWS, Docker/Kubernetes, relational databases, CI/CD; hybrid with 2 days onsite in Viladecans, Barcelona.
Builds a Model Context Protocol (MCP) so AI agents can interact natively with PubMatic, automating programmatic ad operations (inventory, deals, floor prices, OpenWrap/header bidding) plus real-time reporting and optimization. Uses Python, LangChain/LangGraph, APIs, BigQuery and cloud. Hybrid in Madrid, €33k–38k.
A senior Python engineer at King builds and operates backend services, APIs, and data-driven platforms for forecasting and analytics, including distributed pipelines, OLTP database optimization, and cloud-native containerized deployments integrated with King and Microsoft ecosystems.
Senior hands-on backend engineer building and operating production Python services and APIs that integrate AI/LLM capabilities in an AWS-based enterprise environment. Day to day spans architecture, relational databases, Docker/Kubernetes, CI/CD and observability, with a hybrid model of 2 days onsite per week in Viladecans, Barcelona.
Senior Backend Engineer building and operating production-grade Python backend services and REST APIs that power AI/LLM-enabled applications, owning services end-to-end on AWS with Docker, Kubernetes, relational databases, CI/CD and observability. Hybrid model: 2 days onsite per week in Viladecans, Barcelona.
A Python developer with 1-2 years of experience builds a Flask API and automates IBM Cloud infrastructure using Terraform and Jenkins in CI/CD pipelines for cloud and microservices environments. Hybrid role in Madrid or Barcelona (1-2 office days/week, rest remote) on an international team.
Abalia is hiring a Python developer for a fully remote role focused on automation and web scraping. Day to day involves extracting, processing, and automating data using Python and Google Cloud services, with REST APIs, OAuth 2.0, and pipeline management experience valued.
Backend developer on TransPerfect's AI team in Barcelona, building a Python pipeline that converts complex, unstructured PDFs into pixel-perfect editable .docx files. Day to day: benchmarking commercial and open-source OCR/document-AI tools (ABBYY, AWS Textract, LayoutLM-style models), and integrating LLMs like GPT/Claude for layout correction.
Senior Java backend developer/architect working fully remotely for Apiux Tech, serving a leading banking-sector client. Day to day they design software and microservices architectures, build SOAP/REST APIs, and work with Oracle/SQL Server, WebLogic/Tomcat, UML, Git and JIRA within agile teams.
Apiux está buscando un/a ARQUITECTO JAVA para TELETRABAJAR!!! Si sus habilidades, experiencia y cualificaciones coinciden con las de esta descripción del puesto, no demore su solicitud. Somos una empresa tecnológica…
Apiux Tech seeks a senior Java backend developer/architect to work fully remotely for a leading banking client, designing and implementing software architecture, APIs (SOAP/REST), and microservices. Requires 5+ years as a Java architect/team lead in banking, plus Oracle/SQL Server, WebLogic/Tomcat, GIT, JIRA and agile experience.
Apiux Tech is hiring a Java backend architect to work remotely (teletrabajo) for a banking-sector client. Day to day involves designing software architecture, APIs (SOAP/REST) and microservices, using Oracle/SQL Server databases, WebLogic/Tomcat, Git and JIRA in agile teams; requires 5+ years of Java architecture experience in banking.
Senior Python backend developer at DentalData, a SaaS platform helping dental clinics make data-driven decisions. Day to day: building automated ETLs on Google Cloud Platform, designing scalable cloud architectures, optimizing FastAPI backends (Redis, parallelism), and managing Kubernetes/Docker deployments.
Frontend (mobile) developer at EY GDS Spain in Málaga (hybrid) building cross-platform iOS/Android apps with React Native and TypeScript, using Redux and React Navigation, integrating REST APIs, writing automated tests, and collaborating via Git/GitHub workflows. Italian language knowledge is required.
Wayvant, a Google Cloud consultancy, is hiring a full stack developer in Spain to build end-to-end cloud applications: high-performance frontend (React/Vue/Next.js), scalable backend services (Node.js/Python/Go), containerized deployments on Google Cloud Run with CI/CD, plus integration of generative AI/LLM and agentic endpoints.
Middle full-stack developer building and running Generative AI cloud applications in the Microsoft ecosystem, mainly backend (Python or .NET on Azure) with occasional React/Next.js frontend work, CI/CD, and infrastructure-as-code. Fully remote within Spain; candidates must live in Spain with work authorization.
Backend Java developer at SOLTEL Group in Albacete, Spain, designing and maintaining scalable microservices and REST APIs on AWS using Spring Boot, Java 17+, PostgreSQL and JPA/Hibernate, with robust testing via JUnit/Mockito.
Apiux Tech, an IT consultancy, is sourcing a Java Architect (5+ years) to work remotely for a leading banking-sector client, designing software architectures, APIs and microservices. Core stack: Java, Oracle/SQL Server, WebLogic/Tomcat, Git, JIRA and agile frameworks.
Mid-level backend developer at an EdTech group in Monturque, Spain, designing, building and maintaining REST APIs and services with Node.js (Express/Fastify/NestJS), integrating SQL/NoSQL databases like PostgreSQL and MongoDB, plus testing, documentation, Docker and CI/CD. Permanent full-time contract with hybrid work.
Backend-oriented full stack developer joining Pasiona Consulting's AI products team in Barcelona, building a multi-cloud GenAI platform (Secure GPT) on Azure, AWS and Google Cloud. Day to day involves API development, testing, security and scalability work in an international team; AI/RAG/prompt engineering experience is valued.
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