Senior Software Developer

🤓 Lengow, an intelligent and automated e-commerce platform :

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.

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).

You'll be joining the Product Experience Team, a cross-functional engineering group based in Barcelona and Nantes that owns the platform layer across all of Lengow's product suites: channel execution (Netmarkets & Netamplify) and market intelligence (Netrivals & Net Monitor).

We focus on solving the challenges that connect these suites, such as unified identity and access, self-service onboarding, cross-product analytics, and AI-powered features like compliance checks and category mapping. While other teams specialize in a single product, we work across all four, ensuring a cohesive and scalable platform.

The team operates in a remote/hybrid model, values strong engineering practices, and delivers end-to-end features on a modern tech stack.

The stack includes PHP/Symfony, React, PostgreSQL, MariaDB, GCP, Kubernetes, RabbitMQ, and Datadog — with an active push toward AI-augmented development workflows.

As we continue to scale and unify both platforms, we need a strong full-stack engineer who can take ownership of complex backend features while collaborating effectively on the frontend. You'll be a key contributor in a team that values clean code, pragmatic architecture, and cross-functional impact.

⌨️ Your main tasks would be as follows :

• 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

🪜 Hiring Process :

• Phone call with Alexandre our HR (30 min)
• Video interview + technical live test with Ernesto our Engineering Manager (1h15)
• Meet Sergi (VP) and Olivier (CTO)
• Offer letter

Requirements

🏹 We are looking for someone with the following experiences and skills:

• 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)
• Experience with Python (scripting, data processing, or service development), or a strong willingness to learn and apply it in production environments
• 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
• Knowledge of distributed systems concepts (message queues, event-driven architecture, eventual consistency)
• Exposure to GCP or other cloud platforms

Benefits

✨ Joining Lengow is also an opportunity to benefit from many advantages :

• 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).