Senior Python Developer

Lengow is a leader in intelligent e-commerce solutions that help brands and retailers drive profitable growth across the digital shelf. With powerful feed management, global price monitoring, and robust data capabilities, Lengow’s comprehensive SaaS product suite enables merchants to amplify product visibility online, outrun competition with informed pricing, multiply sales on marketplaces, and monitor brand presence among distributors. Since 2009, Lengow has fueled digital growth for over 3,600 customers across thousands of marketing and sales channels in over 60 countries. Lengow is a profitable company. Our Tech Team The Tech, Data, and Product team comprises 70+ people from diverse backgrounds, working in our offices in Nantes, Paris, and Barcelona. Our products are developed thanks to six autonomous product Teams, each working on a specific business domain. The teams are led by a Product Manager and Engineer manager working with a dedicated small team of developers (from 4 to 8).

Purpose of the job: We are seeking a highly skilled and experienced Senior Python Developer to join our growing team. The ideal candidate will have extensive experience in Python development, a deep understanding of clean architecture principles, and a strong background in CI/CD practices, particularly using GitHub Actions and ArgoCD. You will play a key role in designing, developing, and maintaining our software applications, ensuring they are scalable, maintainable, and robust. Your main tasks would be as follows : Development: Design, develop, and maintain high-quality Python applications and services. Clean Architecture: Implement and advocate for clean architecture principles to ensure a scalable, maintainable, and testable codebase. CI/CD Pipeline Management: Design, implement, and maintain CI/CD pipelines using GitHub Actions and ArgoCD to automate workflows, deployments, and infrastructure management. Code Review and Mentorship: Conduct code reviews, provide constructive feedback, and mentor junior developers to uphold best practices and coding standards. Testing: Develop and maintain unit, integration, and end-to-end tests to ensure software quality and reliability. Technical environment: Languages: Python Frameworks: Django, Celery, FastAPI Databases: PostgreSQL, Redis, AWS Tools: GitHub, Jira, Datadog, Docker, RabbitMQ Hiring process: Phone call with Alexandre, our HR Interview with one of our Engineering Managers Technical test and presentation with Clément, Head of Engineering, and the tech team Offer letter Desired experiences and skills: At least 4 years as a Software Developer in Python or other Object-Oriented Programming languages Skills & soft skills : Python Django, PostgreSQL, Celery, Docker Design & Architecture Leadership Curious, Autonomous, Good analytical skills, Proactive, Problem Solver Benefits of joining Lengow: €8 meal vouchers per day Malakoff Humanis Private insurance & Prevoyance Up to 3 remote days per week Flexible working hours Bike mileage or 50% transportation ticket reimbursement Remote working allowances Participation in professional events (Devoxx, Meetup, etc.) and internal team-building activities Weekly Happy Hour on Thursday evenings with food and drinks RTT days with Syntec forfait jours — 218 annual working days, with at least 9 days off on top of 5 weeks of paid leave Choice of operating system for your laptop: MacOS, Windows, or Linux

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