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Senior Full-Stack AI-First Developer (.NET Core + AI Engineering)

smartek21

We are looking for a Senior Full-Stack AI-First Developer to design, build, and deliver end-to-end applications using AI-augmented development practices. The role involves collaborating closely with clients and team members to build scalable, intelligent systems while leveraging AI tools and prompt-driven workflows to improve productivity, quality, and delivery speed.

About smartek21

SmarTek21, founded in 2006, is an innovative digital transformation leader dedicated to empowering organizations through design-led, data-centric solutions.

We believe that exceptional user experiences and intelligent data-driven insights are pivotal in shaping the future of business.

At the heart of our approach is Design-Led Engineering, where we combine strategic design principles with cutting-edge technology to create tailored solutions that deliver significant business outcomes.

A passion unites our dynamic team of technology visionaries and business strategists for innovation and excellence.

Responsibilities

  • Leverage AI-assisted development tools (such as Claude, ChatGPT, Copilot) as core engineering collaborators to improve productivity, code quality, and delivery speed.
  • Apply AI-augmented development practices, including prompt engineering, iterative development, rapid prototyping, and automation of development workflows.
  • Design, develop, and maintain full-stack applications using .NET Core (backend) and Angular/React (frontend).
  • Architect and build high-performance APIs and microservices with a focus on scalability, reliability, and maintainability.
  • Develop reusable prompt patterns and AI-assisted workflows for code generation, debugging, testing, and system design.
  • Write clean, maintainable, and testable code while adhering to best practices, coding standards, and clean architecture principles.
  • Implement cloud-native solutions using platforms such as Azure, including CI/CD pipelines and containerized deployments (Docker).
  • Ensure application security through proper authentication and authorization mechanisms (OAuth, JWT).
  • Apply strong testing practices including TDD/BDD using frameworks like xUnit, NUnit, or MSTest, leveraging AI for test generation and coverage.
  • Collaborate with cross-functional teams to translate business requirements into scalable technical solutions and take ownership of delivery.

Requirements

  • 8+ years of experience in software development with strong expertise in .NET Core and C# for building scalable backend systems.
  • Proven experience in full-stack development, including frontend technologies such as Angular or React.
  • Hands-on experience with AI-assisted coding tools (Claude, ChatGPT, Copilot, or similar) integrated into the development workflow.
  • Strong understanding of prompt engineering, AI-driven development workflows, and rapid experimentation techniques.
  • Expertise in building RESTful APIs and microservices architectures.
  • Experience with relational databases such as SQL Server or PostgreSQL, including data modeling and query optimization.
  • Familiarity with cloud platforms (Azure preferred) and SaaS-based architectures.
  • Knowledge of authentication and authorization mechanisms (OAuth2, JWT, RBAC).
  • Strong understanding of unit testing and TDD using frameworks such as xUnit, MSTest, or NUnit.
  • Experience with Docker, containerization, CI/CD pipelines, and DevOps practices.
  • Proficiency with version control systems such as Git.
  • Strong communication skills and ability to work effectively in a collaborative, team-oriented environment.
  • Detail-oriented with the ability to manage priorities, work independently, and consistently deliver high-quality results.
  • Who We are...
  • Our commitment to accelerating digital transformation includes specialized expertise in Agile DevOps, Data Engineering and analytics, Testing Automation and support, and comprehensive Managed Application and Infrastructure Services.
  • We’ve evolved from our consulting and development roots into a full-spectrum service provider, integrating advanced technologies like Generative AI (GenAI) to facilitate our clients' seamless, transformative digital journeys.

Benefits

  • At SmarTek21, you'll join a collaborative environment dedicated to shaping the digital landscape and driving impactful results for organizations worldwide.
  • Comprehensive benefits package including medical, dental, vision, 401(k), paid time off, paid holidays, Washington paid sick leave, life insurance, and short-term/long-term disability coverage. Eligibility and benefit details are provided upon hire.
  • SmarTek21 is committed to fostering a diverse and inclusive environment. We encourage applications from individuals of all backgrounds and experiences.