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Senior full-stack developer (100% remote within Spain) for UST, designing, building and maintaining Java and JavaScript applications, optimizing SQL against relational databases and Data Lakes, and contributing to CI/CD pipelines and Agile teams. English B2+ is required.
Senior full stack engineer at VoiceB, a startup building autonomous AI voice agents for sales. You'd own features end to end — backend services, APIs, third-party integrations (Salesforce, HubSpot, Twilio, SIP/WebRTC) and internal tooling — on a small team using a modern JS/TS stack (React/Node) on AWS/GCP.
Senior full stack engineer building VoiceB's AI voice-agent platform for B2C sales — shipping backend services, APIs, and integrations (Salesforce, HubSpot, Twilio, SIP/WebRTC) end to end. Core stack is modern JS/TS (React/Node) on cloud infra (AWS/GCP), working directly with the CTO, fully remote within Spain.
UST is hiring a Senior Full Stack Engineer in Spain (remote options available) to build web apps with the latest Angular, implement real-time data features with ag-Grid, and develop Java Spring Boot microservices. Day to day spans front-end/back-end REST integration, performance tuning, AI-assisted development, and Agile collaboration.
Hands-on backend Tech Lead for an AI scale-up's automation platform, owning architecture and mentoring a small engineering team while building distributed, event-driven microservices with Go, AWS and Kafka. Remote within Spain/Europe, €80-110K plus share options.
Senior full-stack developer (100% remote) at Plexus Tech building a cloud-native document archiving solution on the company's own infrastructure. Day-to-day work centers on Java and JavaScript on AWS, CI/CD with Jenkins and Git, and agile tooling, with team-lead responsibilities and GDPR-aware document management.
Senior full stack engineer building VoiceB's autonomous AI voice-agent platform end to end — backend services, APIs, and integrations (Salesforce, HubSpot, Twilio, SIP/WebRTC) in a modern React/Node TypeScript stack on AWS/GCP. Fully remote within Spain on a small startup team, overlapping Barcelona working hours.
Full stack developer with 5-6 years of experience evolving Customer Marketing applications fully remotely from Spain. Day to day you build an Angular 18+ frontend and Java 17 / Spring Boot 3.X backend with REST APIs and microservices, with Kubernetes, Jenkins and Kibana valued.
Plexus Tech is hiring a senior full-stack developer (100% remote, Spain) to build a cloud-native document archiving solution on its own AWS infrastructure, adapting an existing archiving platform with a modern search UI. Day to day: advanced Java/JavaScript development with Jenkins, Git, Confluence and Jira, plus team-lead duties and 1-2 trips a year.
Senior full stack engineer at VoiceB, building the core platform behind autonomous AI voice agents that qualify and close sales for B2C enterprises. Day to day you own features end to end — backend services, APIs, and integrations (Salesforce, HubSpot, Twilio, SIP/WebRTC) — in a React/Node TS stack on AWS/GCP.
Deel is hiring a Full Stack Engineer (EMEA) to build features end-to-end — client, server, service, and database — for its global payroll and HR SaaS platform. Day-to-day work centers on TypeScript/React on the front end, Express (plus NestJS/Next.js/Vite) APIs, and Postgres data modeling, with testing, code reviews, and cross-functional collaboration in a remote-first team.
Senior full-stack developer at the Official College of Pharmacists of Castellón, building and maintaining internal web applications (electronic prescription, medicine verification) day to day: Java/Spring Boot backend, Oracle/PL-SQL, React frontend, plus C#/.NET upkeep and AI/automation workflows. Full-time, on-site in Castellón de la Plana.
Lognext, a tech services firm, is hiring a Full Stack Developer (Java + Angular) in Madrid for a high-complexity hybrid project. Day to day the person builds and evolves Java/Spring Boot and Angular applications, designs REST APIs and microservices, and works with automated testing and deployment tools like Kubernetes, Jenkins and Kibana.
Senior full-stack engineer on Jobrapido's Sales & Marketing team in Alió (Tarragona, Spain), evolving the internal Saleshub tool and building new sales/automation apps on a JavaScript/TypeScript, React, Node.js and SQL stack. The role is AI-native, directing coding agents like Claude Code and Codex, in a hybrid on-site/remote setup.
Senior full-stack developer (100% remote within Spain) designing and maintaining Java/JavaScript applications for UST, working with Oracle/PostgreSQL, advanced SQL and Data Lake environments, plus CI/CD pipelines (GitHub Actions, Kubernetes) in Agile teams. English B2+ required.
Senior engineer for a 100% remote project in Spain at IT consultancy Decskill. Although titled Php/React, the described day-to-day work is Java/Spring Boot back-end development using Kafka, OpenShift/Kubernetes, gRPC and REST APIs, with unit testing, CI/CD and Agile practices.
Plexus.Tech (posted via Abalia) seeks a senior full-stack developer, 100% remote in Spain, to build a cloud-native document archiving solution on its own AWS infrastructure. Day to day: advanced Java/JavaScript development on AWS with Jenkins/Git, document management and GDPR compliance work; MongoDB, S3, SQL, AngularJS and Python are valued extras.
Senior full-stack developer building enterprise emissions-monitoring and Distribution/Pricing/Processing applications using Java, Spring Boot, and Angular, 100% remote. The role covers microservices, REST APIs, CI/CD with Docker/OpenShift, and AI-native development using tools like Copilot, Claude, and Cursor across the SDLC.
Mid–senior full stack developer at Ticket Merchant (live-events tech, Australia-based with a distributed team) building an internal React frontend and Node.js/Next.js backend services in TypeScript, plus automation workflows. Requires 5+ years' experience, Microsoft SQL/Transact-SQL, cloud and DevOps familiarity, and fluency in English and Spanish.
Develops and maintains Moodle-based e-learning platforms at Indra Group — customizing themes, plugins and core components, integrating with corporate APIs, and improving performance, scalability and security. Full stack work with PHP, JavaScript, HTML/CSS and SQL on MySQL/PostgreSQL.
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