Empleos de senior backend java engineer remote en Zaragoza

Airswift is seeking an Expert Quality Assurance specialist to act as the Owner's Engineering QA representative for jacket fabrication activities in Europe. The role involves reviewing contractor QA documentation, procedures, and technical queries, and supporting ITPs and acceptance testing across multiple sites. You will provide QA oversight of welding, NDT,...

bunch is seeking a Senior Applied AI Engineer for its AI Platform team. You will own architecture, evaluation, integration and deployment of multi-agent AI systems in production, working across Mastra, ai-sdk, LangGraph and related tools within EU data residency. You'll build production-grade agents, improve performance, and drive observability, cost...

A leading tech firm in Spain is seeking a Senior Frontend Developer (React) to join their multicultural team. The role involves developing web applications, collaborating in Agile environments, and ensuring code quality. Ideal candidates will possess strong React skills and a Bachelor's degree in Computer Science or related field. This position offers hybrid...

ALTEN Delivery Centre Spain is seeking a senior test automation engineer (BDD) who can operate with German language requirements in an international environment. You will join an experienced team and work remotely with flexible scheduling on long-term projects. You will lead automation activities, implement BDD, and develop tests with Cypress and Cucumber...

Lever, Inc. is seeking a Senior Software Engineer (Golang/TypeScript/React) for an independent contractor role based in Spain. You will develop backend Golang microservices and frontend UI with React and TypeScript, delivering scalable, data-intensive features. You will own features end-to-end, influence architecture, and drive improvements in performance,...

We are looking for a Python Software Backend Engineer to build the backends and APIs behind our solutions: services that consume and publish events, store and serve data, and integrate with our clients’ systems in real time.We are not looking for someone who just resolves tickets. We want someone who talks to the client, understands the business problem...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Backend Engineer, MTA based in Spain. This is an opportunity to build and operate the backend infrastructure that powers high-volume email delivery at scale. You'll work on critical systems spanning SMTP delivery, routing,...

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Backend Engineer, PHP based in Spain. Join a high-scale engineering environment where you’ll build and evolve backend systems powering a global digital gaming marketplace and a growing portfolio of new products. You’ll work...

Your mission at Mercanis At Mercanis, we are building the Agentic AI Procurement Suite that powers the procurement of tomorrow, digital, transparent, and intelligent. We are looking for a Backend Engineer who is excited to build modern, reliable backend services and grow their technical expertise over time. You will work closely with senior engineers,...

We are knowmad mood!Somos una compañía líder en transformación digital, en constante evolución y a la vanguardia de la tecnología. Nacimos para provocar un cambio real a través de la innovación y el desarrollo sostenible, con la misión de aportar valor a los clientes e impulsar nuestro talento.Formado por más de 3.000 personas creativas, digitales...

Playson is seeking a Senior Software Engineer to join a newly forming team owning the Game Engine domain. You will work on engines, mathematical packages, simulations, and RTP monitoring within a regulated, high-precision context. You’ll collaborate with mathematicians, backend engineers, platform teams, and product stakeholders to ensure accuracy and...

Mozilla Corporation is the non-profit-backed technology company behind Firefox, Add-ons, and more. We seek a Senior Software Engineer - Operations to advance the Add-ons platform with secure, reliable systems and cross-functional collaboration. You will help design features, improve architecture, and ensure safety for millions of users globally. The role...

GitHub, in Spain, is seeking a Senior Software Engineer for the Code Scanning Engine Quality team. You will work on CodeQL-powered analysis across GitHub.com and GHES, and help build internal tooling and CI pipelines to validate changes at scale. You will collaborate with multiple engineering teams to deliver high-quality, secure code scanning features,...

ScorePlay is the platform major sports organizations use to manage, search and share media at petabyte scale. You’ll join our Platform team as the second SRE/Infrastructure engineer, building multi-region Kubernetes, Terraform-driven systems and self-service tooling used by product engineers. Remote-first, international team; you’ll own end-to-end...

1Password is growing. We've surpassed $400M in ARR and we're continuing to accelerate, earning a spot on the Forbes Cloud 100 for four years in a row and teaming up with iconic partners like Oracle Red Bull Racing. About 1Password At 1Password, we’re building the foundation for a safe, productive digital future. Our mission is to unleash employee...

Lever, Inc. is partnered with a company seeking a Senior Full Stack Engineer based in Spain. You will build scalable applications using .NET/C#, React/Redux, and SQL databases, with GCP and CI/CD practices. The role blends hands-on coding with architectural input and mentoring, in a remote-first environment. You will collaborate with product and design teams...

A leading IT outsourcing firm is looking for a Senior AI/ML Engineer to lead initiatives in fine-tuning large-scale AI models and build distributed AI architectures. The role is fully remote with some in-person sessions in Prague. Key qualifications include advanced skills in Python, deep learning, and experience deploying LLMs. Ideal candidates have strong...

Lucanet is seeking a Senior QA Engineer to own quality across manual and automated testing for the Tax, Compliance and Reporting platform. You will build Playwright/TypeScript coverage for two teams and mentor developers to take ownership of testing.Join a remote-friendly environment with an emphasis on AI-driven QA, performance testing with K6, and close...

Jobgether SRL is seeking a Senior PHP/Laravel Developer with infrastructure and DevOps experience, based in Spain. You will split time between software development and infrastructure work, driving reliability, performance, and security across data-driven applications.The role requires hands-on leadership, architecture design, and collaboration with...

Jobgether SRL in Spain is seeking a Senior Customer AI Engineer – Token Factory to bridge engineering, delivery, and customer success. You will guide PoC-to-production transitions, optimize AI workloads, and troubleshoot production challenges while ensuring reliability and cost efficiency.You will work closely with customer engineering teams, product, and...