Lead Dev Back-End Java Python

Project overview

What if your next project allowed you to design robust backend architectures and tackle real technical challenges? 🚀

At K-LAGAN, we are looking for a Lead Back-End Developer Java Python (M/F) to support one of our major clients in the design and evolution of distributed systems with high data volumes.

🎯 Your mission

You will be involved in strategic projects requiring strong expertise in Java, Python, and Apache Kafka, with challenges related to performance, scalability, and resilience.

Your role will combine technical architecture, backend development, and support for development teams.

🔧 Your main responsibilities

Profile sought

💻 Technical environment

Essential skills:

Complementary skills appreciated:

• Design and evolve distributed backend architectures.
• Actively participate in the development of services in Java and Python.
• Design and optimize event-driven architectures with Apache Kafka.
• Optimize processing, flows, and management of large volumes of data.
• Anticipate issues related to scaling, performance, and concurrency.
• Ensure application resilience: error management, incident recovery, and prevention of data loss.
• Define development, quality, and security standards.
• Provide technical support to developers and foster the sharing of best practices.
• Collaborate with Data, DevOps, and Product teams.
• Java / Spring Boot: excellent mastery of backend development and microservices architectures.
• Python: development of services and data processing.
• Apache Kafka: significant experience with event-driven architectures, producers, consumers, and flow management.
• Distributed architecture: scalability, performance, resilience, and concurrency management.
• API & microservices: design of robust and scalable solutions.
• GitHub, Jenkins
• Docker, Kubernetes, OpenShift
• Azure or Scaleway
• Node.js
• Playwright

Requirements

Above all, we are looking for an operational Tech Lead, capable of designing solid architectures while remaining involved in development and daily technical issues.

Work environment

ℹ️ Key information

📍 Location: Niort (79)

🏢 Hybrid organization: ideally 2 to 3 days on-site per week initially, with the possibility of spacing out visits to presence every two weeks eventually.

💼 Contract: Permanent or Freelance

💰 Permanent salary: 52 to 55 K€ gross/year depending on profile

💰 Freelance daily rate: 550 to 580 €/day maximum

📅 Start date: as soon as possible / end of 2026, for full operational readiness in early 2027

⏳ Long-term mission: 12 months renewable

🤝 Why join K-LAGAN?

✨ Personalized support throughout your career.

🚀 Stimulating technical projects with major clients.

📚 Training and professional development opportunities.

🤝 A team close to its consultants and attentive to their evolution.

🎉 Events and after-work gatherings to share more than just projects.

🌍 Who are we?

At K-LAGAN, we support companies in their technological transformations around Data & AI, software development, QA, cybersecurity, and agility.

Our ambition: to build lasting collaborations, based on expertise and human connection.

📩 Are you an expert in Java / Python / Kafka and wish to contribute to the design of high-performance distributed systems while supporting a development team? Let's talk!

YOUR GROWTH, OUR VISION 🤖🚀

• Minimum 8 to 10 years of experience in backend development and software architecture.
• Proven expertise in Java / Spring Boot, Python, and Kafka.
• Significant experience in designing distributed systems.
• Ability to be involved in both architectural choices and development.
• Experience in technical support for development teams.
• Sensitivity to quality, security, and performance challenges.
• Autonomy, analytical skills, and good communication abilities.

Project details

• Start: ASAP
• Duration: 1 mois renouvelable
• Location: Niort, Nouvelle-Aquitaine, FR
• Languages: French