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Build and run full-stack systems for treasury operations, including secured financing, margin, and liquidity management using Python/Ruby and Kubernetes.
At Zypp you design and build scalable AI-driven systems — LLMs, AI agents and RAG solutions — plus the backend services behind them (Python/FastAPI, Azure, Supabase). It's a medior, fulltime role in Rotterdam taking AI from prototype to reliable, production-grade software.
Senior Full Stack Engineer joining a Barcelona cybersecurity team that builds and scales a global vulnerability management platform processing millions of records daily. Day-to-day is end-to-end, backend-heavy work with Python/FastAPI, React, Kubernetes/Docker and AWS, plus MongoDB, Redis, RabbitMQ and GitLab CI, with growth toward Tech Lead.
Senior Data Engineer at Experis España building and integrating data-platform APIs in Python/FastAPI to expose Gold Layer data to internal consumers. Works with SQL, Databricks, AWS, and Apache Iceberg lakehouse architectures alongside Data Engineering and Frontend teams, on a hybrid basis from Málaga (2-3 office days/week).
100% remote freelance full-stack developer (40h/week, long-term) building digital solutions for a global company's innovation team via Shakers: Vue.js and TypeScript on the frontend, Python with FastAPI on the backend, Docker/Kubernetes on AWS or Azure, with hands-on LLM and AI agent work.
Full stack developer at IT consultancy PrimeIT España in Chiva, Spain, building Python/FastAPI backends and React frontends. Requires 4+ years of experience, advanced SQL with SQLAlchemy/Alembic, and testing with Pytest, Jest and Playwright.
Full stack developer at a large IT consultancy in Valencia, building backend APIs in Python/FastAPI and frontend features in React. Day-to-day work spans REST/OpenAPI services, advanced SQL with SQLAlchemy/Alembic, Redux state management, and testing with Pytest, Jest and Playwright.
Full stack engineer joining a cybersecurity Vulnerability team at a large European corporate group's Barcelona tech hub, building the platform that centralizes and processes global vulnerability data. Day-to-day: end-to-end feature development with React on the frontend and Python/FastAPI on the backend, automated testing, and progressive exposure to Docker, Kubernetes, and CI/CD.
Full stack engineer joining the Vulnerability team of a cybersecurity domain at a Barcelona tech hub of a large German group, building the core platform that centralizes and processes global vulnerability data. Day-to-day work spans React frontend and Python/FastAPI backend features, automated testing, and integrations with sources like Splunk, ServiceNow, and Salesforce.
100% remote freelance full-stack developer on a long-term engagement via Shakers, building digital solutions with TypeScript, Vue.js, Python/FastAPI and Kubernetes on AWS/Azure, plus hands-on LLM/AI agent work in an international senior team.
Hands-on technical lead building a FHIR-based U.S. healthcare data interoperability platform that connects EHR/EMR systems, payers, and other clinical data sources in real time. The lead mentors backend/data engineers while coding, using FHIR R4/HL7, Python, Kafka, Spark, Kubernetes, and cloud infrastructure with US Core/USCDI/SMART on FHIR compliance.
Backend/AI software engineer at consultancy Arelance (Vigo, Spain) building production-grade Agentic AI systems on an AI & Data team. Day-to-day: Python/FastAPI APIs, LLM agent workflows with LangGraph/LangChain/AWS Bedrock, deployed on AWS Kubernetes/EKS, with CI/CD, Docker, Terraform and observability. Permanent contract, remote options, up to €65k.
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.
Full Stack Engineer (Python/FastAPI + React) joining the Vulnerability team in the cybersecurity domain of a large German group's Barcelona tech hub, building the platform that centralizes and processes global vulnerability data (integrating Splunk, ServiceNow, Salesforce). Hybrid role: ~8 office days/month near Plaza Cataluña.
Senior Python developer (7+ years) building reusable libraries, internal frameworks and microservices, with strong focus on software quality. Fully remote role; stack includes FastAPI, Pip/Poetry/UV, containers, AWS (CloudWatch, X-Ray, AppRunner/Fargate, Lambda) and CI/CD with Git, Jenkins and Sonar. Requires B2 English.
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.
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.
VIVIO Health is hiring a mid/senior Software Engineer to build and maintain the Python services behind its pharmacy and medical claims processing, eligibility, drug-pricing, and internal web apps, using FastAPI, MySQL, and AWS. Fully remote (US) or hybrid from Hayward, CA; no visa sponsorship offered.
Senior engineer building Linux-based software for analytical instrumentation platforms, integrating hardware sensors with Python/C++ services, gRPC APIs, and distributed messaging in a climate-tech company.
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