Senior/ Lead FullStack Engineer

Canadian time zone Time: 6 months About the Opportunity Our client is a leading European online car marketplace, serving 30M+ monthly users across 18 countries. As a Senior/Lead FullStack Engineer: You will play a key technical leadership role within the client’s engineering organization. You will design, build, and evolve scalable backend services and user-facing features across our product suite. You will contribute across a polyglot stack that includes PHP (Laravel), JavaScript, and TypeScript , collaborating closely with product managers, designers, and other engineers to deliver robust, maintainable, and secure solutions. This role requires a high level of proficiency in using AI tools in day-to-day software development. AI-assisted workflows are not optional—they are an expected part of how we design, implement, test, debug, document, and optimize software. As a Senior/ Lead engineer, you will also help elevate your team’s AI capabilities by modeling effective usage patterns and sharing best practices. What You'll Do Architect, design, and implement scalable services and product features using PHP (Laravel) Build and maintain frontend features using JavaScript and TypeScript Use AI tools extensively for code generation, refactoring, test creation, debugging, performance optimization, and documentation Critically evaluate AI-generated outputs to ensure correctness, security, maintainability, and alignment with architectural standards Lead technical design discussions and contribute to system and API architecture decisions Own complex features end-to-end, from technical design through deployment, monitoring, and iteration Drive improvements in code quality, performance, reliability, and security Write clean, maintainable, and well-tested code with strong automated test coverage Conduct in-depth code reviews and mentor engineers through actionable feedback Coach teammates on effective and responsible AI usage in software engineering workflows Collaborate cross-functionally to translate business requirements into scalable technical solutions Contribute to cloud infrastructure and services (AWS), ensuring high availability and operational excellence Participate in compensated on-call rotations to ensure platform reliability Champion DevOps best practices, CI/CD improvements, and observability standards Identify and lead technical initiatives that improve long-term platform sustainability What We're Looking For 6-8 years of extensive professional experience in backend software development Strong expertise in PHP and Laravel (6+ years) Proficiency in JavaScript and TypeScript for modern frontend development Demonstrated advanced proficiency using AI tools in day-to-day engineering work (code generation, debugging, test automation, documentation, architectural exploration) Strong ability to validate, refine, and productionize AI-assisted outputs Experience improving team-level engineering practices Deep understanding of API design, distributed systems, and scalable architecture patterns Experience working with  AWS or similar cloud environments Strong knowledge of  CI/CD pipelines and modern DevOps practices Experience designing and optimizing relational databases and data models Proven ability to independently lead complex technical initiatives Strong problem-solving skills and ability to navigate ambiguity Clear and effective communication skills Participate in compensated on-call rotations to ensure reliability of our backend services Canadian timezone working hours English proficiency at B2/C1 level or higher. Nice to Have Experience integrating AI capabilities into production products (e.g., LLM integrations, AI-driven features, intelligent workflows) Experience designing AI-enabled user experiences or backend AI services Experience in automotive, dealer software, or SaaS platforms Experience with containerization (Docker, Kubernetes) Event-driven architectures and messaging systems Performance tuning and high-scale system optimization Experience working in multi-product platform environments 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

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