Lead Full Stack Software Engineer with AI

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 C# or Node.js • Strong proficiency with 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