Senior/ Lead FullStack Engineer

N-iX; Argentina; A distancia; ARS 136.577.000 - 212.453.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Flexible working format

Competitive salary

Education reimbursement

Professional development tools

Descripción de la vacante

N-iX is seeking a Senior/Lead FullStack Engineer for a European online car marketplace client. You will design, build, and evolve scalable backend services with PHP (Laravel) and frontend work in JavaScript/TypeScript, collaborating with PMs, designers, and engineers to deliver robust, secure solutions.

The role emphasizes extensive use of AI tools in daily development and requires leadership in architectural decisions, code quality, and mentoring peers while supporting AWS-based infrastructure

Formación

• 6–8 years of backend software development.
• Proficient in PHP and Laravel (6+ years).
• Strong JS/TS for frontend development.
• Experience with AWS and CI/CD pipelines.

Responsabilidades

• Architect scalable services and features using PHP (Laravel).
• Build and maintain frontend features with JavaScript/TypeScript.
• Leverage AI tools for code generation, debugging, testing, and documentation.
• Lead technical design discussions and contribute to system/API architecture decisions.
• Own complex features end-to-end from design to deployment and monitoring.
• Drive code quality, performance, reliability, and security improvements.
• Mentor engineers and provide actionable feedback on code reviews.
• Collaborate cross-functionally to translate business needs into scalable tech solutions.
• Contribute to cloud infrastructure and services (AWS) and ensure high availability.
• Participate in compensated on-call rotations to maintain platform reliability.
• Champion DevOps practices, CI/CD improvements, and observability standards.

Conocimientos

Backend development

PHP Laravel

JavaScript/TypeScript

AI tooling usage

API design

AWS cloud

CI/CD pipelines

Leadership

Herramientas

Docker

Kubernetes

SQL databases

Descripción del empleo

About the Opportunity

Our client is a leading European online car marketplace, serving 30M+ monthly users across 18 countries.

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