Principal Engineer responsible for enhancing service integrations at CDP Global, focusing on environmental impact. Collaborate with tech leads to align on integration standards and document architecture.
About the role
- Full-stack engineer joining Lengow's Tech team in Barcelona to enhance e-commerce solutions. Collaborating cross-functionally while managing backend and frontend development tasks.
Responsibilities
- Design, build, and maintain backend services and APIs in PHP/Symfony across both platforms
- Own database schema design, query optimization, and migration strategies in PostgreSQL/MariaDB
- Contribute to React-based frontends — reviewing, implementing, and improving UI features
- Collaborate on architectural decisions and participate actively in code reviews
- Operate and deploy services in a Kubernetes/GCP environment, maintaining observability with Datadog
- Work closely with product managers, designers, and peer engineers in an agile setup
- Leverage AI-assisted development tools (GitHub Copilot, Claude, Gemini) as part of your daily workflow
Requirements
- You have a good level of English
- Flexible and customer-oriented, you enjoy problem-solving and decision-making based on data and impact measurement.
- Experience with observability tooling (logging, metrics, tracing)
- Backend
- 3–5 years of professional experience with PHP ( preferred Symfony framework but not required )
- Solid understanding of relational databases, with hands-on experience in PostgreSQL (query optimization, schema design, migrations)
- Strong grasp of RESTful API design and integration patterns
- Familiarity with containerization using Docker and Kubernetes
- Frontend
- Working proficiency in React, enough to read, contribute to, and review frontend code confidently
- Comfortable working with TypeScript and modern JavaScript build pipelines.
- Engineering Fundamentals
- Clean code practices, code review culture, and attention to maintainability
- Experience working in remote/hybrid distributed teams
- Comfortable working on large, existing codebases
- AI Literacy & Usage
- Comfortable using AI coding assistants (GitHub Copilot, Claude Code, Gemini) as part of your daily development workflow
- Able to evaluate and apply AI-generated suggestions critically, knowing when to accept, modify, or discard them
- Familiarity with prompt engineering basics and how LLMs can be leveraged for code review, documentation, and test generation
- Curiosity and openness toward emerging AI tooling in the developer ecosystem, including agents and MCP integrations
- Nice to Have
- Ability to own a feature end-to-end (backend + frontend) when needed, reducing cross-team dependencies
- Experience with Python (scripting, data processing, or service development)
- Knowledge of distributed systems concepts (message queues, event-driven architecture, eventual consistency)
- Exposure to GCP or other cloud platforms
Benefits
- Ticket restaurant 8 euros by day
- Malakoff Humanis Private insurance & Prevoyance.
- 3 Remote days per week
- Flexible hours
- Bike mileage allowances or 50% of transportation tickets.
- Remote allowances
- Weekly Happy Break on Thursday Evening at the office with food and beverage
- **Specific benefits may vary depending on your country of employment (France or Spain).**
Job title
Job type
Experience level
Salary
Not specified
Degree requirement
Tech skills
Location requirements
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