Senior Lead Full Stack Developer (Entra ID/API)

About the role

Sparq is seeking a Senior Lead Full Stack Developer to design, build, and maintain secure backend APIs with a strong focus on authentication and Azure identity solutions. You will work remotely or in a hybrid setting, collaborating with a diverse engineering team to modernize client systems and integrate AI tools into daily workflows.

Key responsibilities

• Design, develop, and maintain secure backend APIs using C#.NET Core/.NET 6+, and ASP.NET Core.
• Implement Entra ID/Azure AD authentication flows, including OAuth, JWT, managed identities, and token‑based access.
• Support migration of legacy systems to Azure‑based identity solutions and improve API security.
• Partner with senior architects to align development with cloud architecture patterns and Azure best practices.
• Collaborate with front‑end teams (Vue.js, React, Angular) to ensure seamless authentication experiences.
• Develop and maintain secure service‑to‑service integrations in micro‑services or distributed environments.
• Troubleshoot authentication issues across backend and front‑end applications.
• Participate in design discussions, code reviews, and promote clean, maintainable code.

Required profile

• Consultative mindset with strong problem‑solving abilities.
• Experience leading full‑stack development projects.
• Willingness to experiment with AI tools and champion their adoption.

Required skills

• C#
• .NET Core / .NET 6+
• ASP.NET Core
• Entra ID / Azure AD
• OAuth and JWT
• Managed Identities
• Azure cloud services
• Vue.js, React, or Angular
• Micro‑services architecture
• Secure API development

What we offer

• Collaborative, diverse team environment.
• Continuous learning through training, mentorship, and certifications.
• Access to cutting‑edge AI tools (Claude, Anthropic partnership).
• Remote or hybrid work flexibility.
• Recognition programs and employee awards.