Summary: Seeking a Senior FullStack Engineer to shape the future of online car markets, enhancing user experience through developing fast, high-traffic websites and exploring new technologies. Highlights: 1. Shape the future of online car markets for millions of users. 2. Develop fast, high-traffic public-facing websites. 3. Explore and apply new technologies, including AI tools. We are looking for a Senior FullStack Engineer to join our team. Our customer is the European online car market, with over 30 million monthly users and a presence in 18 countries. As a Senior FullStack Engineer, you will play a pivotal role in shaping the future of online car markets and enhancing the user experience for millions of car buyers and sellers. **Responsibilities:** * Developing fast, high\-traffic public\-facing websites * Explore new technologies and help the team to use them * Work using AI tools and apply them to the SDLC * Following software development best practices while delivering the work * Following testing principles while testing your own code to ensure production readiness * Follow the philosophy of: you\-build\-it\-you\-run\-it (be responsible for the SDLC processes) **Requirements:** * 4\+ years developing reliable, highly available, and scalable software systems * Strong understanding of software architecture and design patterns * Firm grasp of clean code principles and coding standards * Strong proficiency using AI tooling, such as ChatGPT/Codex, for rapid development * Experience integrating AI tooling into your development environment for streamlined usage * Experience with AI Frameworks like Vercel AI SDK, LangChain, etc. * Strong proficiency with backend development (Typescript, Node.js, C\#) * Strong proficiency with SQL \& NoSQL datastores (GraphQL, Redis) * Strong proficiency with frontend development (HTML, CSS, JavaScript) * Strong proficiency with component\-based frameworks and SSR (Next.js/React, Vue.js, Angular) * Hands\-on experience developing and maintaining 3rd party content management systems * Knowledge of modern cloud infrastructures and tools, such as AWS, Terraform, and Docker * Experience with APIs and developing in a service\-based application environment * Experience building optimized UIs for performance * Proficiency with version control systems such as Git * Experience working within a formal CI/CD pipeline * Experience with logging, monitoring, and alerting services like Datadog, Newrelic * Solid approach to testing and ensuring quality of code, Unit testing, backend, and frontend * At least Upper\-intermediate English level * Working for the North America timezone (ET) is preferable (till 21:00 Kyiv time) **We offer\*:** * Flexible working format \- remote, office\-based or flexible * A competitive salary and good compensation package * Personalized career growth * Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) * Active tech communities with regular knowledge sharing * Education reimbursement * Memorable anniversary presents * Corporate events and team buildings * Other location\-specific benefits * not applicable for freelancers