Remote React Native Developer Associate Jobs in Fairfield, CA

Required Skills: 

We are seeking for a 12+ years of software engineering experience, including at least 4 years acting as a Principal Engineer or Software Architect managing multi-tier platforms within life sciences, medical devices, or industrial IoT domains. This role requires a powerful blend of legacy and modern technology expertise, with deep proficiency spanning C++/C# Windows services, on-device applet software, .NET Framework architectures (Web Forms, MVC, Web API, WCF), Node.js Express, and cutting-edge frontend ecosystems like React 18/19. A strong candidate will demonstrate extensive mastery of enterprise identity and access management, specifically Azure AD, MSAL, and JWT bearer authentication, alongside the ability to manage co-existing legacy Forms and Windows Authentication models. From a data and infrastructure standpoint, the architect must excel in SQL Server multi-database schema design, stored procedure governance, query optimization, and PowerShell deployment automation, alongside robust IIS configuration and TLS/SSL certificate management. Furthermore, the position demands a rigorous approach to platform security, including TLS 1.2+ enforcement, automated secrets rotation, AES configuration encryption, and secure code-signing pipeline design. Finally, the candidate must possess proven experience designing custom network protocols or binary/text network layers, coupled with the ability to engineer robust CI/CD pipelines for complex, multi-solution codebases.

Key Responsibilities and Experience Include:

• Serve as the technical authority by conducting rigorous code and design reviews, enforcing engineering standards, and mentoring senior engineers across C++, C#, Node.js, and React technologies.
• Formalize enterprise DevOps practices by designing and implementing green-field CI/CD pipelines capable of supporting mixed .NET Framework, Node.js, and React technology stacks.
• Drive the end-to-end architecture and technical strategy for the Instrument Intelligence Platform, encompassing remote monitoring applets, cloud-native SaaS solutions, and Unity Next clinical QC benchmarking engines.
• Establish and govern a unified cross-platform architecture, ensuring seamless interoperability, scalability, and technology alignment across the ecosystem.
• Author and maintain Architecture Decision Records (ADRs), High-Level Design (HLD), Low-Level Design (LLD) documents, and interface/data contracts to support platform consistency and governance.
• Enforce platform security and compliance standards, including TLS 1.2+, automated secrets rotation through Key Vault, secure code-signing pipelines, AES-encrypted configurations, and zero-PII telemetry compliance.
• Lead the modernization of legacy applications by transforming ASP.NET MVC 5 and AngularJS interfaces into highly scalable React 19 Single Page Applications (SPA).
• Design and implement modern REST APIs within the cloud tier to enable scalable, secure, and extensible platform integrations.
• Architect and maintain the dual-state Azure-to-AWS cloud migration framework while defining the roadmap for cloud-native multi-instrument fleet APIs and imaging system integrations.
• Manage dual-binary codebase constraints by maintaining feature parity and stability across x64/.NET 4.8 and legacy x86/.NET 2.0 transmitter environments.

• Serve as a hands-on technical authority, balancing high-level cloud strategy and stakeholder engagement with deep technical involvement in code reviews, solution design, and architectural decision-making.
• Lead the transition from legacy on-device systems, including Win32 services and custom binary protocols, to modern cloud-native architectures while ensuring business continuity and platform stability.
• Communicate complex cross-platform technical concepts effectively, translating architectural decisions into clear, actionable roadmaps for IT leadership, product management, compliance organizations, and field-service stakeholders.
• Champion engineering excellence through security-by-design principles, rigorous documentation standards, quality-focused development practices, and continuous improvement initiatives.
• Mentor and develop engineering teams by fostering a culture of technical growth, collaboration, architectural discipline, and adherence to best practices across the software development lifecycle.

Donato Technologies Inc. is a trusted IT staffing, consulting, and software development partner headquartered in Dallas, Texas. We support clients across industries by understanding their unique business needs and delivering tailored technology and workforce solutions. Our focus is on connecting the right talent with the right opportunity-ensuring clients receive dependable, skilled professionals and candidates receive meaningful career growth and support. We work closely with small to mid-sized organizations to provide flexible, high-quality services that drive performance, innovation, and long-term success.