Senior Full Stack Software Engineer

### Requirements: * 5+ years of professional full-stack software development experience; 10+ years is strongly preferred. * Strong proficiency in TypeScript across frontend and backend (React, Node.js, Express.js). * Solid command of PostgreSQL and relational database design; experience with ORM systems such as Sequelize. * Familiarity with Vite and modern frontend build tooling. * Hands-on experience with AWS services (S3, SES, deployment infrastructure) and Docker-based containerization. * Experience maintaining CI/CD pipelines and Git-based workflows in a team setting. * Understanding of event-driven and queue-based architecture patterns. * Background integrating payment gateways (credit card and/or e-wallet providers) and hands-on experience integrating AI or LLM features in a production SaaS context are a plus. ### Soft Skills: * Comfortable working across different technical areas and switching priorities when needed. * Able to take responsibility for assigned work from start to finish, including delivery, follow-up, and continuous improvement. * Works effectively with cross-functional stakeholders, including engineers, designers, and domain experts. * Attentive to the potential impact of decisions in a security-sensitive environment. * Fluent in English; French or German would be an advantage.