Senior Backend Engineer

Position: Senior Backend Engineer at Welcome to the Jungle France. As a Backend Engineer you are responsible for designing, developing, and maintaining server‑side components, APIs, and data architecture. The role requires deep expertise in backend technologies and the ability to build robust, scalable systems while collaborating effectively within an agile team environment. You will work closely with Engineering Managers, Product Managers, Front End Engineers, and other team members to implement features, improve system architecture, and deliver high‑quality deliverables that meet both technical and business requirements. Key Responsibilities Design, develop, and maintain scalable back‑end services and APIs. Build and optimize database schemas and data models. Write clean, maintainable, and well‑tested code following team standards and best practices. Participate in code reviews and provide constructive feedback to team members. Debug production issues and implement robust solutions. Contribute to technical documentation and architecture decisions. Design and implement RESTful APIs and GraphQL endpoints. Optimize application performance, database queries, and system scalability. Implement caching strategies and asynchronous processing systems. Participate in agile ceremonies and technical planning sessions. Actively collaborate with an autonomous mission team to clarify priorities and user needs. Participate in squad rituals and team meetings. Handle support requests and bug fixes within agreed SLAs. Write unit and integration tests following TDD principles. Collaborate with QA to ensure comprehensive test coverage. Participate in pair programming and continuous integration/deployment processes. Implement logging, monitoring, and alerting systems. Follow security best practices and address vulnerabilities proactively. Contribute to continuous improvement of performance and scalability. Implement backup and data integrity strategies. Ideal Candidate 7+ years of professional software development experience in back‑end development. Strong expertise in back‑end technologies and system architecture. Comfortable with: Server‑side technologies (Elixir, Node.js, Ruby, Python, Java, or similar). Database systems (PostgreSQL, MySQL, MongoDB, Redis, etc.). RESTful APIs and/or GraphQL. Microservices architecture and distributed systems. Message queues and event‑driven architectures (RabbitMQ, Kafka, etc.). Version control systems (Git). Testing frameworks and methodologies (unit, integration, end‑to‑end). CI/CD practices and deployment automation. Cloud platforms (AWS, GCP, Azure). Containerization and orchestration (Docker, Kubernetes). Software craftsmanship practices. Demonstrate strong problem‑solving skills and attention to detail. Deep understanding of system design, scalability, and performance optimization. Excellent communication skills in French and English. Ability to work effectively in a remote environment. Collaboration mindset and team‑first attitude. Product thinking and user‑centric approach to development. Commitment to writing maintainable, well‑documented code. Proactive attitude in suggesting improvements and solutions. Security‑first mindset and awareness of common vulnerabilities. Welcome to the Jungle is committed to positive social impact and respects diversity, inclusion, and equity. Regardless of qualifications, we’re looking for a passionate individual who will fit well with the team and take responsibility for these issues. Seniority level Mid‑Senior level Employment type Full‑time Job function Other Industries IT Services and IT Consulting Referrals increase your chances of interviewing at Welcome to the Jungle France by 2x. Get notified about new Back End Developer jobs in Paris, Île‑de‑France, France. #J-18808-Ljbffr