Senior AI Software Engineer – Fintech SummaryDepartment: Product / EngineeringContract: Full-time (CDI)Start date: ASAPLocation: Brussels / Hybrid / RemoteAbout the CompanyOur client is a fast-growing European fintech building a platform that connects financial software and business tools through powerful integrations.Their mission is to simplify and automate the way companies exchange financial data between different systems. The platform enables businesses to seamlessly connect accounting software, fintech tools and other business applications.The company is currently scaling rapidly and offers the opportunity to join an ambitious tech team at an early stage, where engineers have a strong impact on the product and technical decisions. Your MissionAs a Senior AI Software Engineer, you will play a key role in designing and delivering AI-driven engineering projects across the platform.You will work on automation, AI-powered workflows, and scalable APIs, helping the company build the next generation of financial software integrations.You will collaborate closely with the technical leadership and product teams, owning projects from architecture to production. ResponsibilitiesDesign and implement scalable and highly available APIsBuild AI-powered automations and agentic workflowsDevelop systems that help automate integration creation and testingWork on AI workflows orchestrationContribute to internal and external documentationEnsure high-quality and reliable backend systemsParticipate in technical architecture decisionsPotential opportunity to grow into a Team Lead role ProfileDegree in Computer Science or equivalent experienceMinimum 5 years of experience in software engineeringExperience working with AI systems such as:LLMsAgentic workflowsRAG pipelinesAI automation frameworksStrong backend development experienceTechnical stack:Python (required)SQLTypescript (nice to have)Databases (PostgreSQL, MySQL)Docker / containerizationStrong interest in business logic and financial systemsStartup mindset: autonomy, curiosity, ownershipAbility to work in a fast-paced and collaborative environmentLanguagesFrench requiredEnglish professional levelDutch is a plus What the Company OffersDirect collaboration with senior technical leadershipStrong learning curve and technical ownershipOpportunity to join a rapidly growing fintech startupHybrid / remote working flexibilityAttractive compensation packageBenefits (meal vouchers, mobility budget, flexible holidays)Potential equity participationCollaborative and entrepreneurial environment