(Senior) Freelance Web Developer in Tremblay-en-France, Île-de-France at Jobgether

This position is posted by Jobgether on behalf of a partner company. We are currently looking for a (Senior) Freelance Web Developer in France.

This opportunity is ideal for an experienced full-stack developer who thrives in autonomous, fast-paced environments and enjoys building scalable digital products from the ground up. You will contribute to high-priority internal platforms and client-facing initiatives, playing a key role in shaping robust web applications and core technical infrastructure. The role combines hands-on engineering, architectural thinking, and operational ownership, offering the chance to work across modern frameworks, APIs, cloud environments, and deployment pipelines. You’ll collaborate with distributed teams while maintaining a high degree of independence and accountability in your day-to-day work. This position is particularly suited to professionals who enjoy solving complex technical challenges, optimizing user experiences, and leveraging modern development practices and AI-assisted tooling to accelerate delivery and innovation.

• Design, develop, and maintain high-performance web applications, services, and operational tools across frontend and backend environments.
• Contribute to scalable system architecture, including API structures, data models, authentication systems, and cloud-based infrastructure.
• Implement complex features and intuitive user interfaces from concept through deployment while ensuring maintainability and performance.
• Integrate third-party services, APIs, and internal systems to enhance functionality and improve operational efficiency.
• Optimize applications for accessibility, SEO, Core Web Vitals, and overall user experience in alignment with modern web standards.
• Manage deployment workflows, CI/CD pipelines, and secure hosting environments to support reliable product delivery.
• Troubleshoot technical issues independently, propose effective solutions proactively, and take ownership of deliverables with minimal supervision.
• Produce and maintain clear technical documentation to support collaboration, scalability, and long-term maintainability.

Requirements:

• 5+ years of professional experience delivering production-ready web applications and full-stack development projects.
• Expert-level proficiency with modern JavaScript frameworks and strong hands-on experience with TypeScript, HTML5, and CSS.
• Solid backend development expertise, including REST/GraphQL APIs, authentication systems, database interactions, and state management.
• Experience with Tailwind CSS, CSS Modules, or other modern styling methodologies is highly valued.
• Strong understanding of software architecture, scalability, and performance optimization best practices.
• Proven experience with Git/GitHub workflows, branching strategies, and collaborative development processes.
• Familiarity with cloud platforms such as AWS, Azure, or GCP, along with deployment automation and CI/CD pipelines.
• Knowledge of accessibility standards (WCAG 2.1 AA), SEO principles, and Core Web Vitals optimization.
• Comfortable leveraging AI-powered development tools and automation solutions to improve productivity and code quality.
• Excellent English communication skills and the ability to collaborate effectively with technical and non-technical stakeholders.
• Strong sense of ownership, adaptability, and the ability to work autonomously in a remote environment.

Benefits:

• Fully remote freelance opportunity within CET ±2 hours time zone compatibility.
• Flexible workload with an expected commitment of 25–35 hours per week.
• Initial 2–3 month contract with strong potential for long-term collaboration and expanded engagement.
• Opportunity to work on impactful internal platforms and innovative web-based products.
• High level of autonomy and ownership within a collaborative engineering environment.
• Exposure to modern technologies, scalable architectures, and AI-assisted development workflows.
• Flexible work schedule designed to support productivity and work-life balance.
• Potential to transition into a long-term strategic partnership based on performance and mutual fit.