Staff Software Engineer - Barcelona

OverviewIn this Staff Software Engineer role within the Supply domain, you steer the architectural direction for modernizing a Go-based stack toward Java/Kotlin/Spring, leading cross-domain migration with zero downtime.You will mentor engineers, define patterns, and coordinate with product teams to balance tech debt and new value.The role emphasizes strong observability, global collaboration, and the use of AI-assisted tools to accelerate refactoring.You’ll work on high-impact initiatives that shape the platform powering a large, global marketplace for survey data.Compensaciones / BeneficiosRemote-FirstHigh AutonomyGlobal impactPioneering modernizationCollaborative cultureRecognition and growth opportunitiesResponsabilidadesDesign patterns for legacy displacement to move domains out of the monolith with zero downtimeOwn architectural vision for legacy displacement across the domain, defining patterns and standardsMentor senior and mid-level engineers and improve design quality through reviewsBuild new services and help transition others from Go to Spring across codebasesPartner with product managers to shape requirements and roadmaps balancing debt and valueCommunicate effectively across timezones; produce clear async documentationImprove observability using Grafana and tracing to keep backend systems healthyLeverage AI tooling (e.g., Claude Code) to accelerate refactoring and development workflowsRequisitos principales10+ years of backend engineering experience with production-critical systemsDeep backend expertise with capability to work across languages; frontend experience with React welcomedStrong collaboration mindset with mentoring and knowledge sharingExperience with event-driven architectures and monolith migrationsCommitment to quality with unit, integration, and end-to-end testingProduct-minded pragmatic approach and understanding of business impactAdvocate of observability and system performance monitoringcollaborationmentorshipcommunication across timezonesbackend engineeringGoSpring

Requisitos principales10+ years of backend engineering experience with production-critical systems Deep backend expertise with capability to work across languages; frontend experience with React welcomed Strong collaboration mindset with mentoring and knowledge sharing Experience with event-driven architectures and monolith migrations Commitment to quality with unit, integration, and end-to-end testing Product-minded pragmatic approach and understanding of business impact Advocate of observability and system performance monitoring collaboration mentorship communication across timezones backend engineering