Web3 Developer Senior Jobs in France

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a Senior Software Back-End Engineer in Worldwide.

In this role, you will work on a high-impact, hybrid backend system that combines traditional web infrastructure with blockchain integrations. You will design, implement, and maintain features that engage millions of users in the gaming and esports ecosystem, bridging Web2 and Web3 technologies. The position offers the opportunity to solve unique technical challenges, optimize performance, and work closely with product teams to ship features quickly. You will manage end-to-end ownership of backend systems, including API design, database performance, and integration with smart contracts when necessary. This role is ideal for engineers who thrive in dynamic, fast-paced environments and want exposure to both conventional backend engineering and emerging blockchain technologies. Remote flexibility, collaboration, and hands-on impact are core aspects of this role.

Accountabilities

• Build, deploy, and maintain backend features using Nest.js, PostgreSQL, AWS, Docker, and TypeScript.
• Implement integrations between traditional backend systems and blockchain technologies, including smart contracts, wallets, and on-chain/off-chain data synchronization.
• Optimize existing systems for performance, scalability, and reliability, monitoring API responses, database queries, and production workloads.
• Own features end-to-end from implementation to production monitoring, debugging, and deployment.
• Collaborate with product and engineering teams to deliver new game mechanics, AI integrations, and other fan engagement features.
• Design and maintain APIs for internal and external consumption, ensuring smooth integration with third-party services.

• Strong expertise in Nest.js, PostgreSQL, AWS, Docker, and TypeScript.
• Proven track record of shipping backend features to production in fast-paced environments.
• Experience with API design, third-party integrations, and performance optimization.
• Familiarity with blockchain technologies, smart contract interactions, wallet integrations, or on-chain data indexing.
• Excellent problem-solving skills and ability to navigate complex hybrid systems.
• Strong communication skills and ability to collaborate with cross-functional teams.

Preferred:

• Previous experience working at a Web3 company or building decentralized applications (dApps).
• Knowledge of optimizing backend systems under high load conditions.
• Interest in gaming/esports and understanding of gamification principles.

• Competitive salary plus token-based compensation (XBG or project-specific rewards).
• Weekly team gaming sessions and community events.
• Bi-yearly team retreats and support for conferences and professional development.
• Full remote flexibility, allowing you to work from anywhere.
• Opportunity to work on cutting-edge hybrid backend systems combining Web2 and Web3 technologies.

Jobgether is a Talent Matching Platform that partners with companies worldwide to efficiently connect top talent with the right opportunities through AI-driven job matching.

When you apply, your profile goes through our AI-powered screening process designed to identify top talent efficiently and fairly. 🔍 Our AI evaluates your CV and LinkedIn profile thoroughly, analyzing your skills, experience, and achievements. 📊 It compares your profile to the job’s core requirements and past success factors to determine your match score. 🎯 Based on this analysis, we automatically shortlist the three candidates with the highest match to the role. 🧠 When necessary, our human team may perform an additional manual review to ensure no strong profile is missed.

This process is transparent, skills-based, and free of bias, focusing solely on your fit for the role. Once the shortlist is completed, we share it directly with the company offering the position. The final decision and next steps (such as interviews or assessments) are made by their internal hiring team.

Thank you for your interest!

#LI-CL1

• Strong expertise in Nest.js, PostgreSQL, AWS, Docker, and TypeScript.
• Proven track record of shipping backend features to production in fast-paced environments.
• Experience with API design, third-party integrations, and performance optimization.
• Familiarity with blockchain technologies, smart contract interactions, wallet integrations, or on-chain data indexing.
• Excellent problem-solving skills and ability to navigate complex hybrid systems.
• Strong communication skills and ability to collaborate with cross-functional teams.

Preferred:

• Previous experience working at a Web3 company or building decentralized applications (dApps).
• Knowledge of optimizing backend systems under high load conditions.
• Interest in gaming/esports and understanding of gamification principles.

• Competitive salary plus token-based compensation (XBG or project-specific rewards).
• Weekly team gaming sessions and community events.
• Bi-yearly team retreats and support for conferences and professional development.
• Full remote flexibility, allowing you to work from anywhere.
• Opportunity to work on cutting-edge hybrid backend systems combining Web2 and Web3 technologies.

Jobgether is a Talent Matching Platform that partners with companies worldwide to efficiently connect top talent with the right opportunities through AI-driven job matching.

When you apply, your profile goes through our AI-powered screening process designed to identify top talent efficiently and fairly. 🔍 Our AI evaluates your CV and LinkedIn profile thoroughly, analyzing your skills, experience, and achievements. 📊 It compares your profile to the job’s core requirements and past success factors to determine your match score. 🎯 Based on this analysis, we automatically shortlist the three candidates with the highest match to the role. 🧠 When necessary, our human team may perform an additional manual review to ensure no strong profile is missed.

This process is transparent, skills-based, and free of bias, focusing solely on your fit for the role. Once the shortlist is completed, we share it directly with the company offering the position. The final decision and next steps (such as interviews or assessments) are made by their internal hiring team.

Thank you for your interest!

#LI-CL1