Top Tech Jobs & Startup Jobs in Spain

Lead the company’s Physical AI research and engineering function as a hands-on technical leader. Define research priorities, design and train Transformer-based models, establish rigorous offline and real-world evaluations, integrate systems with physical robots, and analyze failures across data, models, hardware, and environments. Build a focused team, guide technical architecture and experiments, translate customer needs into requirements, and deliver measurable improvements through deployed models, benchmarks, evaluation systems, or data products.

Leads OQC’s research software, logical compilation, and systems integration teams in Spain. Sets technical direction, shapes architectures, translates scientific challenges into software capabilities, and guides research tooling from experimentation to production. Builds a high-performing organization, develops technical leaders, partners with research and engineering groups, and integrates quantum computing systems with HPC environments, third-party platforms, and community tools.

Own strategic B2B SaaS customer accounts, assess client needs, guide onboarding and data gathering, develop partnership strategies, support renewals and growth, and lead cross-functional teams. Build industry-specific use cases, advise sustainability executives, identify product opportunities, and represent Waterplan at site visits, webinars, and industry events. The role combines analytics, strategy, sustainability, and customer engagement.

Implements SS&C Algorithmics financial risk and capital management solutions for European clients. Responsibilities include technical architecture, software configuration, database and middleware setup, system integration, data mapping, custom development, testing, troubleshooting, performance optimization, documentation, and client training. The role requires Unix/Linux expertise, programming ability, database familiarity, client-facing communication, and fluent English and Spanish. Work is hybrid in Madrid with occasional travel to client sites across Spain and Europe.

Own the email channel’s revenue contribution, lifecycle and retention strategy, attribution, segmentation, dashboards, deliverability, and automated journeys across multiple SaaS products. Lead churn-prevention and win-back programs, collaborate with Product and Data teams, use behavioral and predictive data for personalization, and manage three email marketing specialists.

Design intuitive B2B product experiences from discovery through delivery, including user flows, prototypes, usability testing, and design system contributions. Collaborate with product managers and engineers while also creating marketing, sales, branding, landing page, advertising, and campaign assets. The role is remote, part-time, and contract-based, with a $1,500 monthly retainer plus project-based compensation.

Own the architecture, operation, scaling, reliability, and cost efficiency of Sezzle’s AWS and Kubernetes infrastructure. Diagnose performance and capacity constraints across compute, networking, clusters, and Aurora databases; build infrastructure-as-code, observability, disaster recovery, and automation; participate in on-call and incident recovery; execute safe migrations; and develop AI-assisted operational tooling. The role requires deep technical leadership, hands-on coding, production troubleshooting, and collaboration across engineering, security, and compliance.

Lead Salesforce data migration activities, including data extraction, cleansing, deduplication, transformation, loading, reconciliation, and validation. Develop source-to-target mappings aligned with Salesforce’s data model, execute migrations using Data Loader, ETL tools, and APIs, and support integrations with ERP, marketing, and data platforms. Collaborate with architects, developers, and business stakeholders while ensuring data quality, integrity, and compliance with technical and business requirements.

Own product certifications end to end, translating certification frameworks into product requirements, preparing evaluation evidence, coordinating development teams, and managing evaluators, consultants, and certification bodies. Maintain certification documentation, status records, and compliance tracking; advise internal stakeholders and customers; monitor regulatory changes; represent the company at industry events; and use AI to analyze regulations and support certification artifacts.

Participate as an integral member of consulting teams, contributing to client projects while developing consulting skills under the guidance of a personal mentor. The internship is designed for students completing bachelor’s or master’s degrees and emphasizes analytical ability, communication, teamwork, academic excellence, practical experience, international exposure, and Spanish fluency.