Senior Software Development Engineer in Test (SDET)

We're looking for a hands-on Senior SDET who approaches quality as a core part of engineering-not a downstream function. This role is ideal for a backend-focused engineer who writes production-quality code, partners closely with development teams, and builds scalable frameworks that make systems more reliable, testable, and resilient by design. The right candidate thinks like a developer first, brings strong systems-thinking, and takes ownership of quality from design through production., * Design and develop scalable, testable services, APIs, and frameworks that support end-to-end system validation

• Embed quality into the development lifecycle using TDD/BDD practices
• Build and maintain automated validation at the API and backend layers (UI automation used selectively)
• Partner with engineering teams to influence architecture and design decisions that improve testability and reliability
• Integrate automated testing into CI/CD pipelines to enable fast, confident releases
• Own quality outcomes across the full lifecycle-from development through production support
• Participate in code reviews, ensuring high standards for readability, maintainability, and test coverage
• Develop and manage test data, environments, and supporting utilities within a DevOps mindset
• Investigate production issues, perform root cause analysis, and contribute to long-term solutions
• Support a full-stack environment (.NET + Angular) with a focus on backend systems, APIs, and data integrity

• 7-10+ years of experience in software engineering with a strong focus on testability and quality
• Strong programming skills in C#, TypeScript, JavaScript, or Python (backend emphasis preferred)
• Hands-on experience with test-driven development (TDD) and/or behavior-driven development (BDD)
• Deep experience validating APIs, backend services, and system integrations
• Strong understanding of data flows, system behavior, and application architecture
• Experience building and maintaining automated testing frameworks (API and service-level preferred)
• Familiarity with CI/CD pipelines and integrating automated validation into deployment workflows
• Experience in modern .NET (Core/6+) environments with Angular front-end ecosystems
• Solid grasp of software design principles (modularity, scalability, maintainability)
• Ability to troubleshoot complex systems across services, data layers, and infrastructure
• Experience working in Agile/Scrum environments with shared ownership of delivery and quality

Preferred:

• Experience with tools such as xUnit, NUnit, Playwright, REST clients, and TestRail (or similar)
• Exposure to containerization and DevOps tools (Docker, GitHub Actions)
• Cloud experience (AWS preferred)
• AI agents for automation

Founded in 2015, Shield AI is a venture-backed deep-tech company with the mission of protecting service members and civilians with intelligent systems. Its products include the V-B…, © 2026 Careerjet All rights reserved