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.Net/Python Software Developer | Energy Sector

New HybridEuropeContract

Freelance back-end .NET/Python developer (via recruiter Etinars) for a large international energy-sector client in Brussels: build real-time services that balance the electric grid and connect assets like batteries and renewable parks. Hybrid — 2 days onsite in Brussels, 3 remote; €475–500/day, 1-year contract extendable to 3.

Agile AKS API Azure Azure Functions +19 skills

475 – 500 € / day

Senior Full-Stack Developer

New EuropeSenior

On-site senior full-stack developer in Sevilla for a tourism tech company (founded 2009) offering cultural and gastronomic experiences. Day to day: develop and scale its own e-commerce platform using PHP, HTML, CSS, JavaScript, SQL and API integrations.

API CSS E-commerce Git HTML +4 skills

Triangle Talent - Solutions RRHH (España)

Desarrollador/A Backend Senior Java-Spring Boot-Microservicios - €35.000 - €40.000 Al Año - Remoto

New EuropeSenior

Senior Java backend developer for a tech company specializing in digital signature and certified communications. Designs, builds, and maintains scalable REST APIs and microservices with Java/Spring Boot and MySQL, participating in the full SDLC (design to CI/CD deployment), with remote work and flexible hours in Spain.

API Java Microservices REST Spring

35K – 40K €

Java Developer- Hibrido Madrid

Hybrid (Madrid-based) Java Developer position via SlashMobility, a corporate mobility solutions consultancy with 70+ staff, for one of its banking-sector clients. Day to day: building backend microservices in Java 11+ using Spring Boot.

Allianz Technology SE Spain Branch

Expert Full Stack Developer

New HybridEuropeContract

Senior full stack developer at Allianz Technology who designs, builds, and maintains enterprise web applications for partner projects, integrating front-end frameworks (Angular/React/Vue) with Java Spring Boot back-ends on cloud platforms, while using AI coding assistants like Copilot and Claude Code daily.

AI Angular API Api Design AWS +15 skills

Appcast, Triangle Talent - Solutions RRHH (España)

Desarrollador/A Backend Senior Java-Spring Boot-Microservicios - €35.000 - €40.000 Al Año - Remoto

New EuropeSenior

Senior backend developer (3+ years) designing and building Java/Spring Boot microservices and scalable REST APIs for a company specializing in digital signature and certified communications. Day-to-day covers the full software lifecycle — design, development, CI/CD, performance tuning — using MySQL, Git, GitLab/Jenkins and Linux, with remote work in Spain.

API Java Microservices REST Spring

35K – 40K €

Senior Java Developer, Madrid

New EuropeSenior

Senior Java developer placed by IT services firm Apolo IT Group with a multinational telecom client, working on-site in Las Rozas (Madrid). Day to day: building microservices with Java/Spring Boot on AWS, using Docker, Kubernetes, Istio and Helm, with immediate start.

AWS Helm Istio Java Kubernetes +1 skills

eXperience IT Solutions

Desarrollador/A Backend | Certificación Apx | 100% Remoto

Backend developer (2+ years experience) with APX certification to join a stable, long-duration, 100% remote project at Spanish IT consultancy Grupo eXperience, developing and maintaining backend solutions for a top-tier client.

Amber-Green Facilities SL

Ai Backend Developer

Designs and maintains Python backend services and REST APIs (FastAPI/Flask/Django) that integrate LLM and AI APIs into AIM Sport's sports-marketing products, combining AI pipelines with deterministic rule-based workflows. On-site in Madrid.

AI Anthropic API Api Design Authentication +31 skills

Senior Frontend Developer - React / Go, 100% En Remoto

New EuropeSenior

100% remote senior developer role focused on building modern, secure and scalable web applications: mainly frontend work with React and TypeScript, integrating REST APIs, automated testing and cloud tooling, with professional Go (Golang) experience also required.

Agile API Cloud Docker Go +9 skills

Full Stack Developer, 100% En Remoto

100% remote full stack lead role (Spain): drives architecture and engineering standards across multiple teams, leads platform initiatives, and owns branching/release strategy. Core stack is Java 17/21 with Spring Boot 3.x backend and Angular 18+ frontend; React Native experience is a plus. B2/C1 English required.

Angular API Clean Architecture Git Hibernate +7 skills

Allianz Technology SE Spain Branch

Ai Full Stack Developer

New HybridEuropeContract

Full-stack developer at Allianz Technology building AI-enabled, scalable applications for the global Business Master Platform (BMP), a strategic insurance initiative. Day-to-day spans Java/Spring Boot backends, Angular/TypeScript frontends, APIs and event-driven services, plus integrating AI/ML, CI/CD pipelines and cloud deployments.

Agile AI Angular API Automation +17 skills

Bolsas y Mercados Españoles

Full Stack Java Developer

Full stack Java developer on BME's (Spanish stock exchange, part of SIX) Trading Web Application Development team in Madrid, building high-performance Java/Spring Boot services with Angular front-ends, Kafka messaging, SQL/Hibernate persistence, and Kubernetes/OpenShift deployments, working in Scrum/SAFe agile teams with up to 40% work from home.

Agile Angular CI/CD CSS Design Thinking +13 skills

3MT Global Service

Java Developer With Data

TIBCO Integration Engineer supporting and evolving the integration ecosystem of a multinational healthcare company: monitoring integrations (TIBCO 5.16, SAP S/4HANA), analyzing incidents, testing, and documenting in Jira, in a hybrid role in Valencia. Requires TIBCO experience, XML/JSON, SQL, and fluent English and Spanish.

Jira JSON SAP SAP S/4HANA SFTP +4 skills

Beca Backend Developer- Madrid

Internship (beca) position for a Backend Developer at SlashMobility, a Madrid-based boutique digital transformation company that builds apps and provides IT talent for clients. The posting lists few specifics: candidates must be Computer Engineering students eligible for an internship agreement.

Frontend Developer (Angular) 100% Remoto - €27.000 - €30.000 Al Año - Remoto

100% remote frontend developer role focused on building and integrating new features in Angular applications, fixing bugs, implementing modern UIs, testing, and documenting code while collaborating with backend teams. Core stack: Angular 13+, JavaScript, HTML, CSS, SASS, and Bootstrap. Salary is €27,000–€30,000 per year with a permanent contract.

Angular Bootstrap CSS HTML JavaScript +2 skills

27K – 30K €

Beca Backend Developer- Cáceres

Backend developer internship (beca) at SlashMobility, a boutique digital transformation consultancy, based in Cáceres, Spain on-site. The posting lists few specifics: candidates need university studies and must be eligible for an internship agreement; no particular technologies are named.

Senior Java Developer

New EuropeSenior

Senior Java developer building and evolving SaaS platforms for fleet management and smart mobility at a growing Spanish tech company. Day to day: backend services with Java, Spring Boot and Spring Security, REST/SOAP API integration, code reviews and quality standards, working agile (Scrum/Kanban) with frontend, product and QA.

API Git Hibernate Java JPA +10 skills

Senior Frontend Developer (React.Js) - €300 - €400 A Day

New EuropeContractSenior

Contract senior frontend developer role in Pontevedra, Spain (on-site), building high-performance, conversion-focused interfaces for public websites and internal tools, integrating components into PHP via Twig, and running A/B tests. Core stack: HTML5/CSS3, JavaScript ES6+, jQuery, Twig, BEM/SASS; React/TypeScript is a nice-to-have.

AI CSS HTML JavaScript jQuery +5 skills

300 – 400 € / day

Senior Full Stack Developer

New EuropeSenior

Senior full-stack developer at SlashMobility, a Barcelona-based digital-transformation boutique, designing and maintaining complex web applications end to end — building secure backend services and APIs with Java/Spring and modern UIs with Angular, Angular Material and RxJS, with unit, integration and E2E testing.

Angular API Cloud CSS Cypress +9 skills