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Senior Lead Full Stack Developer (Entra ID/API)

Role overview

Qualifications

  • Consultative approach and problem solving skills
  • Hands-on experience using AI tools
  • Flexible to adapt within a high-growth organization
  • Full understanding of the software development life cycle

Responsibilities

  • Design, build, and maintain secure backend APIs using C#, .NET Core/.NET 6+, and ASP.NET Core
  • Implement and support Entra ID/Azure AD authentication flows
  • Collaborate with front-end developers using Vue.js, React, or Angular
  • Contribute to technical design discussions, code reviews, and system improvements

Key facts

Other skills

  • Problem Solving
  • Consultative Approaches
  • Leadership
  • Social Skills
  • Communication

About the company

Sparq logo

Sparq

Sparq is the leading U.S.-based digital engineering consultancy for building, deploying and supporting digital applications, products and experiences. Sparq assembles trusted software engineering teams that collaboratively solve challenges with creativity and rigor. Our experts know how to work together—with each other and with clients—generating momentum, velocity and success.

Company details

Company typeSME
Company size501 - 1000

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Job description

At Sparq, we help companies solve the right problems—not just build more technology.


We’re a modern product engineering partner blending strategy, craftsmanship, and speed to help organizations modernize confidently in the age of AI. From data ecosystems to digital products and AI acceleration, we turn complexity into clarity and ideas into impact.


If you’re driven to build what’s next, lead with empathy, and deliver excellence without ego, you’ll feel right at home at Sparq.


Why you will enjoy Mondays again:

  • Opportunity to work alongside a talented, diverse team in a collaborative and creative environment
  • Ongoing investment in your growth through training, mentorship, and industry certifications
  • Hands-on exposure to cutting-edge technologies across multiple industries
  • Recognition programs and employee awards within an inclusive culture that celebrates great work, including our AI Innovators Program
  • Remote or hybrid work options

A Day in the Life:

  • Design, build, and maintain secure backend APIs using C#, .NET Core/.NET 6+, and ASP.NET Core, with a focus on authentication, authorization, and secure service communication.
  • Implement and support Entra ID/Azure AD authentication flows, including OAuth, JWT, managed identities, and token-based access patterns across backend services and web applications.
  • Help modernize existing systems by supporting migration efforts to Entra ID and Azure-based identity solutions, while identifying opportunities to improve API security and application architecture.
  • Partner closely with senior architects and engineering teams to align development work with established security standards, cloud architecture patterns, and Azure best practices.
  • Actively leverage AI tools to streamline tasks, improve the quality of your work, and share best practices with teammates while continuously seeking new ways to integrate AI into your everyday workflows
  • Collaborate with front-end developers using Vue.js, React, or Angular to support authentication flow design and ensure backend identity patterns integrate effectively with the user experience.
  • Develop and enhance secure service-to-service integrations within a distributed or microservices-based environment, ensuring APIs are reliable, scalable, and protected.
  • Troubleshoot authentication issues across backend services and front-end applications, helping ensure login, access, token handling, and authorization flows work smoothly for end users.
  • Contribute to technical design discussions, code reviews, and system improvements with an emphasis on clean code, secure development practices, and long-term maintainability.

What it takes:

  • Consultative approach and problem solving skills to successfully align digital solutions with long-term business goals of the client
  • Hands-on experience using AI tools to enhance daily work, or a strong desire to do so, including a willingness to experiment, learn, and champion AI adoption within your role
  • Commitment to understanding and exceeding client expectations
  • Ability to perform project oversight and execution of deliverables
  • Flexibility to adapt within a high-growth organization
  • Ability to lead, mentor and motivate those around them
  • Hunger for continuous learning and professional development
  • Intellectual curiosity to provide creative solutions
  • Full understanding of the software development life cycle
  • Ability to positively impact fellow colleagues through effective leadership, presentations, coaching, etc.
  • Desire to work in a team environment
  • Good interpersonal, written and verbal communication skills

Regardless of your specific role, we seek individuals who are excited to explore, adopt, and evangelize AI tools and methodologies. If you have experience in AI or a proven track record of rapidly learning and mentoring others on emerging tech, you’ll fit right in.


Equal Employment Opportunity Policy: Sparq is proud to offer equal employment opportunity without regard to age, color, disability, gender, gender identity, genetic information, marital status, military status, national origin, race, religion, sexual orientation, veteran status, or any other legally protected characteristic.


We are committed to providing equal employment opportunities and believe in an inclusive workplace. If you require reasonable accommodations to participate in the job application or interview process, please let us know by contacting recruiting@teamsparq.com




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