Senior Lead Full Stack Developer (Entra ID/API)

About the role

Sparq is looking for a Senior Lead Full Stack Developer to design, build, and maintain secure backend APIs with a strong focus on authentication and authorization. You will work on modernizing identity solutions using Entra ID/Azure AD while collaborating with front‑end teams to deliver seamless user experiences.

Key responsibilities

• Design, develop, and maintain secure backend APIs using C#.NET Core/.NET 6+, and ASP.NET Core.
• Implement and support Entra ID/Azure AD authentication flows, including OAuth, JWT, managed identities, and token‑based access.
• Assist 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.
• Leverage AI tools to streamline development tasks and share best practices.
• Collaborate with Vue.js, React, or Angular front‑end developers to integrate authentication flows.
• Develop secure service‑to‑service integrations in a microservices environment.
• Troubleshoot authentication issues across backend and front‑end applications.
• Participate in design discussions, code reviews, and continuous improvement initiatives.

Required profile

• Consultative mindset with strong problem‑solving abilities.
• Commitment to exceeding client expectations.
• Willingness to experiment with and champion AI tools in daily work.
• Ability to work collaboratively with cross‑functional teams.

Required skills

• C#
• .NET Core / .NET 6+
• ASP.NET Core
• Entra ID / Azure AD
• OAuth
• JWT
• Managed identities
• Token‑based authentication
• Microservices architecture
• Vue.js
• React
• Angular

What we offer

• Collaborative, diverse team environment.
• Continuous growth through training, mentorship, and certifications.
• Access to cutting‑edge technologies across multiple industries.
• Recognition programs and employee awards.
• Remote or hybrid work options.