Principal Software Engineer (.NET + Data) - Remote - USA

FullStack is one of the fastest-growing software consultancy companies in the Americas, delivering transformational digital solutions to top global companies and Silicon Valley startups. They are seeking a Principal Software Engineer with extensive experience to work directly with clients or on FullStack product teams, focusing on software development and technical leadership.

Responsibilities:

• Integrate directly into our client's team and work alongside their existing designers and engineers daily
• Work on a FullStack product team to build and deliver a product to our clients

Requirements:

• 8+ years of professional software engineering experience
• 3+ years of experience in technical leadership influencing architecture and engineering direction
• Advanced English is required
• Successful completion of a four-year college degree is required
• Expert-level proficiency with C# and .NET framework
• Hands-on experience with TypeScript/JavaScript
• Strong experience building and scaling distributed systems in production
• Proven experience with AWS
• Solid experience with containerization tools such as Docker or Kubernetes
• Deep knowledge of Infrastructure as Code (Terraform and Helm), CI/CD, and GitOps practices
• Experience with SQL and NoSQL databases
• Experience implementing event streaming solutions using Kafka or Kinesis
• Strong understanding of microservices architecture and event-driven systems
• Experience implementing secure authentication and authorization using OAuth/OIDC
• Experience designing and maintaining APIs and service-to-service integrations
• Experience implementing observability practices using tools such as Datadog, Prometheus, CloudWatch, or distributed tracing solutions
• Strong background in testing strategies including Test-Driven Development (TDD), integration testing, and performance testing
• Ability to work through new and difficult issues and contribute to libraries as needed
• Ability to create and maintain continuous integration and delivery of applications
• Forensic attention to detail
• A positive mindset and a can-do attitude
• Experience working on Agile/Scrum teams
• Meaningful experience working on large, complex systems
• Ability to take extreme ownership over your work. Every day is a challenge to ensure you are performing to the expectations you and your team have agreed upon
• Ability to identify with the goals of FullStack's clients and dedicate yourself to delivering on the commitments you and your team make to them
• Ability to consistently work 40 hours per week
• Cursor, Windsurf, or Google Antigravity
• Claude Code, Gemini CLI, Codex, or Copilot CLI