Top Tech Jobs & Startup Jobs in Spain

Provides personalized financial planning and investment guidance to clients, recommending banking, brokerage, and money management solutions. Builds client relationships, identifies prospects, triages requests, makes internal referrals, manages risk, and meets financial goals. The role requires obtaining industry licenses, completing training, and maintaining SAFE Act registration where applicable. Work is scheduled Monday through Friday with rotating Saturdays.

Lead end-to-end deployments of frontier AI models for strategic customers, from discovery and system design through production rollout. Build full-stack production systems, guide customer adoption, scope delivery, manage trade-offs, and contribute code across frontend and backend. Collaborate with Product, Research, Security, GRC, Partnerships, and customer teams while sharing field feedback that improves products and model roadmaps. The role is hybrid in Madrid, requires Spanish and English fluency, and involves up to 50% travel.

Develop cross-platform C++ mapping APIs and software components for native applications, mobile and desktop devices, Unity, and Unreal Engine. Responsibilities include designing APIs, implementing mapping visualization and rendering capabilities, collaborating with development teams, defining requirements, supporting real-world GIS scenarios, and solving complex application design challenges. The role requires modern C++, object-oriented design, algorithms, design patterns, and commercial software development experience.

Owns global accounting operations, month-end close, journal entries, accruals, reconciliations, financial statement analysis, audit-ready workpapers, and US GAAP reporting. The role also manages digital asset wallet and crypto subledger reconciliations, partners with Treasury on liquidity activities, and embeds AI-assisted workflows and automations into accounting processes.

Own fonio’s social media presence across channels, including content calendars, community management, and daily collaboration with content creators. Ghostwrite and grow founder and leadership profiles, particularly on LinkedIn and Instagram. Create engaging content that positions the B2B AI startup like a consumer brand, using AI tools to work efficiently and delivering strong written English content.

Manage and grow relationships with Twitch Partners and recruit high-potential creators. Responsibilities include creator onboarding, account support, stream reviews, community engagement, event participation, CRM documentation, performance reporting, trend analysis, and cross-functional collaboration with Marketing, Product, and Sales teams.

Design and develop Java services within distributed applications for document and image processing. Collaborate with the team and product owner, apply maintainability, testability, performance, security, and quality standards, participate in code reviews, and improve the platform. The role requires Java and Spring Boot expertise, SQL and NoSQL database knowledge, RabbitMQ experience, microservices familiarity, and fluency in English and Spanish.

Own supplier quality for critical electrical systems: develop supplier qualification and audit processes, drive supplier development and industrialization, lead root-cause investigations and corrective actions, support NPI and production readiness, and collaborate cross-functionally to scale robust quality systems internationally.

Provide 24/7 multilingual customer support for vehicle rentals through phone, email, and video calls. Assist with reservations, customer verification, pickup processes, self-service key-pickup troubleshooting, and issue resolution. Collaborate with international SIXT branches and promote additional products or services. The role requires fluency in German, English, and Spanish, strong communication and customer-service skills, flexibility for night shifts, teamwork, and a solution-focused approach.

Supports Regional Sales Managers and Product Managers with business development strategies, customer relationship management, purchase order collection, consignment optimization, expired-item replacement, and inventory reduction. Provides pre- and post-surgery support in hospitals, prepares surgical kits, checks returned equipment, and helps organize client workshops. Requires strong communication, prioritization, problem-solving, product-learning, and relationship-building skills, with frequent field travel.