Summary: As a Lead FullStack Engineer, you will play a pivotal role in shaping the future of online car markets, enhancing user experience, and exploring new technologies while adhering to best practices and taking responsibility for the full SDLC. Highlights: 1. Pivotal role in shaping the future of online car markets 2. Explore new technologies and apply AI tools to SDLC 3. Personalized career growth and professional development tools **About the client:** Our customer is the European online car market, with over 30 million monthly users and a presence in 18 countries. As a Lead 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:** * **5\+ 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 with either of the following technologies **Typescript \+Node.js** or **C\#\+Typescript** * 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 or Vue.js) or Angular with the desire to learn React/ Vue.js. * 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** * This role requires mandatory timezone coverage: work must align with the Toronto (ET) timezone for LATAM hours and **13:00–21:00 EET** for EU hours approximately. **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