AD4 Octógono

AD4 Octógono, a people & technology consultancy, is hiring a Full Stack Developer with React and Java/Spring Boot for a client project in Madrid (hybrid, 2 days/week at the client's offices). The role involves building and maintaining apps, adding features, and resolving incidents; 2–4 years of experience required, €30,000–38,000 gross/year.

Java Python React Spring

Data Engineer Senior

New EuropeSenior

Airflow API Azure Azure DevOps CI/CD +6 skills

En AD4 Octógono estamos contratando. Buscamos un/a Data Engineer Senior para un proyecto en el Sector Energético . ¿Qué harás? Te incorporarás a un proyecto estratégico en el sector energético, donde trabajarás en el…

4 days ago

Senior Full Stack Engineer - AI-Driven Backend & Microservices

New EuropeSenior

Angular API CI/CD Docker Hibernate +6 skills

AD4 Octógono busca un/a Senior Full Stack Software Engineer orientado a Backend para unirse a un proyecto tecnológico innovador con IA aplicada. Se requieren +5 años en desarrollo Full Stack, experto en Java, Spring…

4 days ago

Senior Full Stack Developer (AI-Native) - ANDALUCIA

New EuropeSenior

AI Angular API AWS CI/CD +21 skills

En AD4 Octógono buscamos un/a Senior Full Stack Software Engineer , con orientación preferente a Backend , para incorporarse a un proyecto tecnológico donde la innovación y la IA aplicada al desarrollo tienen un papel…

last week

Data Engineer: Pipelines y Data Lakes (Híbrido, Madrid)

Europe

AD4 Octógono busca un/a Data Engineer para reforzar y evolucionar la infraestructura de datos existente. Siga leyendo para descubrir lo que necesitará para tener éxito en este puesto, incluyendo habilidades,…

Data Engineer

Europe

API AWS Azure Cloud Data Engineering +11 skills

Data Engineer at AD4 Octógono (People & Technology) in Madrid (hybrid): build and maintain ETL/ELT pipelines, integrate databases, APIs and cloud data sources, and evolve an existing data infrastructure using SQL, Python, Git, and Data Warehouse/Data Lake architectures. Salary €35k–€40k gross per year.

Data Engineer: Pipelines y Data Lakes (Híbrido, Madrid)

Europe

Hybrid (Madrid-based) data engineer role at AD4 Octógono: the hire reinforces an existing data infrastructure by integrating data sources and databases, building ETL/ELT pipelines, and improving data quality and availability, with room to propose process improvements.

Full Stack Java Developer - REMOTO LATAM

Open 17d EuropeContract

Full Stack Java Developer working 100% remotely (freelance option for LATAM-based candidates) on an international Front Office Trading project, modernizing and evolving a Java platform. Requires 4+ years of Java, English C1, and interest in applying AI tools to development.

Remote Full-Stack Java Developer for AI Trading Platform

Open 17d EuropeContract

Java Full Stack developer with 4+ years of experience to work on an international Front Office Trading project, modernizing the Java technology base and collaborating with global teams, 100% remote. AI experience is valued; freelance arrangement possible for LATAM profiles.

Senior Java Developer - HealthTech (Remote/Hybrid)

Open 17d EuropeSenior

Senior Java developer who evolves and maintains enterprise Java applications on a stable healthcare-sector project, building new features and continuously improving existing solutions. Based in Madrid with work-from-home options available.

Full Stack Java/Angular Dev — Remote, CI/CD, Prod Ops

Open 19d Europe

Angular API CI/CD DevOps Java +2 skills

AD4 Octogono busca un/a Full Stack Developer con 3-6 años de experiencia para trabajar en backend con Java/Spring Boot y frontend con Angular, en un entorno productivo. Los candidatos deben tomarse el tiempo de leer…

Remote Full-Stack Java Developer for AI Trading Platform

Open 20d EuropeContract

AD4 Octógono seeks a Java full-stack developer with 4+ years of experience to work on an international front-office trading project, modernizing its Java technology base alongside global teams. The role is 100% remote (freelance option for LATAM profiles), with AI experience valued.

Full Stack Java Developer - REMOTO LATAM

Open 20d EuropeContract

API AWS Cloud C# .NET +4 skills

Full Stack Java Developer (100% remote, aimed at LATAM candidates) to help modernize a Java platform supporting a Front Office Trading environment for an international project. Day to day: Java development and refactoring of existing apps, collaborating with international teams and applying AI tools. Requires 4+ years of Java and English C1.

Remote FinTech Full-Stack: Java/.NET for Fixed Income

Open 20d LATAMContract

Colombia

Freelance, 100% remote (from LATAM) full-stack developer role on an international investment banking project covering fixed income, high yield bonds and convertibles. Day to day involves developing, evolving and supporting enterprise applications in Java and .NET, translating business requirements into reliable, high-performance solutions with strong data quality.

Full Stack Developer Java / .NET - LATAM

Open 20d LATAMContract

Colombia

Full stack developer building and supporting enterprise applications for an international investment banking project covering Fixed Income, High Yield Bonds and Convertibles. Day-to-day work combines Java/Groovy and .NET (ASP.NET Core) development, SQL Server data work, AWS migration, testing, releases and production support. 100% remote from LATAM, freelance.

Senior MERN Full-Stack Engineer – Remote/Hybrid

Open 21d EuropeSenior

AD4 Octógono busca un Desarrollador/a Fullstack Senior (MERN) para diseñar y construir soluciones web completas, robustas y escalables, tanto en frontend como en backend, con impacto directo en producto y negocio.…

Remote Data Engineer - Cloudera & Big Data Pipelines

Open 21d Europe

AD4 Octogono busca un/a Data Engineer especializado/a en Cloudera para diseñar, construir y operar soluciones de ingeniería del dato sobre CDP. Haga clic en "Solicitar" a continuación para enviar su…

Senior AI Agent Developer: GenAI & Backend Python

Open 21d EuropeSenior

API Azure Generative AI OpenAI Python

Design, develop, and maintain production AI agents and multi-agent flows, turning business use cases into secure, scalable solutions with business, data, risk, and compliance teams. Core stack is GenAI, Python, APIs, and OpenAI/Azure OpenAI tools, in a hybrid setup from Madrid or Andalucía.

Java Backend Developer | Batch & Cloud (Hybrid Madrid)

Open 21d Europe

AD4 Octógono convoca a un/a Desarrollador/a Java Backend con al menos un año de experiencia para un proyecto crítico en el sector financiero. Aumente sus posibilidades de llegar a la fase de entrevista leyendo la…

Cloud Java Spring