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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.
Job Responsibility:
Continue the evolution and scaling of our freshly released, native ChatGPT apps and custom MCP integrations
Develop and maintain high-traffic, public-facing interfaces hosted on AWS modern cloud infrastructure
Work heavily with AI agents (Claude Code, ChatGPT/Codex) to maintain and extend a codebase
Operate with full team autonomy, collaborating closely with the Engineering Manager in a "co-author" environment
Follow the "you-build-it-you-own-it" philosophy, taking full responsibility for the SDLC and production readiness
Explore and implement emerging AI frameworks and technologies to keep the product at the forefront of the GenAI market
Requirements:
7+ years of experience developing reliable, highly available, and scalable software systems
Strong experience working with AI agents (Claude Code, ChatGPT/Codex) to maintain and extend a codebase
Strong proficiency with backend development using Node.js / Java/ .Net and TypeScript
Deep experience with Model Context Protocols (MCP)
Proven track record of using AI tooling (ChatGPT, Codex, Claude Code) for rapid operator-driven development
Hands-on experience with modern cloud infrastructures, specifically AWS, Terraform, and Docker
Strong proficiency with frontend development (HTML, CSS, JavaScript) and component-based SSR frameworks like Next.js or React
Experience with SQL and NoSQL datastores, as well as developing in service-based API environments
Strong understanding of software architecture, design patterns, and clean code principles
A modern, energetic mindset with critical thinking and systemic vision skills, the ability to work independently and take high-level ownership
Experience with formal CI/CD pipelines and monitoring services
Upper-intermediate English level
What 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