Technical Principal Engineer (.NET, React/Next.js, Azure & AI)
Summary
Designs and builds secure, AI-enabled enterprise apps using .NET, React/Next.js, and Azure, while leading architecture and AI integration in a regulated fintech environment.
Role: Technical Principal Engineer (.NET, React/Next.js, Azure & AI)
Location: Hybrid
Rate: $60-70/hr
Employment Type: Contract
Look for 15+ years exp
ONLY H1B Candidate
Position Overview
We are seeking a highly skilled and hands‑on Technical Principal Engineer to design, build, and operate secure, scalable, and AI-enabled products and integrations across Vialto's global technology platform. This role requires a strong engineering leader who can deliver end‑to‑end solutions across modern web applications, cloud-native services, and AI-powered workflows while contributing to architectural strategy and technical excellence.
The ideal candidate will possess deep expertise in React/Next.js, C#/.NET, Microsoft Azure, distributed systems, security, and modern software architecture principles. This individual will leverage agentic development practices, including AI-assisted development tools such as Claude Code, Codex, and similar coding agents, to accelerate delivery while maintaining enterprise-grade quality, security, and compliance standards.
Key Responsibilities
Application Development
- Design, develop, and maintain modern web applications using Next.js, React, TypeScript, HTML, and CSS.
- Build scalable backend services and APIs using C#, ASP.NET Core, Web API, and .NET technologies.
- Deliver secure and performant enterprise applications supporting payroll, tax, immigration, and other business‑critical workflows.
- Design and implement reusable UI components, shared libraries, and design systems.
- Build and operate cloud‑native solutions utilizing Microsoft Azure PaaS services.
- Implement secure deployment architectures, networking, identity management, and operational tooling.
- Develop and maintain highly available, fault‑tolerant, and scalable cloud services.
- Establish observability using:
- OpenTelemetry
- Distributed tracing
- Structured logging
- Monitoring and alerting frameworks
- Contribute to enterprise architecture decisions and technical roadmaps.
- Design REST‑based and event‑driven integration architectures.
- Build scalable microservices and micro‑frontend architectures.
- Architect and implement:
- Define integration patterns supporting enterprise‑scale workloads and cross‑platform interoperability.
AI & Agentic Development
- Design and build AI‑native applications and workflows.
- Implement AI‑powered capabilities including:
- Prompt Engineering
- LLM API Integration
- Retrieval‑Augmented Generation (RAG)
- AI‑assisted business workflows
- Leverage AI coding agents such as:
- Codex
- Similar AI development tools
- Utilize spec‑driven development methodologies to guide both human and AI‑assisted implementation.
- Evaluate and operationalize AI models, APIs, orchestration frameworks, and toolchains.
Security & Compliance
- Implement secure software development practices suitable for regulated environments.
- Design solutions incorporating:
- OAuth 2.0
- RBAC (Role‑Based Access Control)
- Data Encryption at Rest and In Transit
- Privacy Controls
- Auditability Requirements
- Ensure compliance with enterprise security and governance standards.
- Mentor engineering teams through code reviews, pair programming, and technical coaching.
- Collaborate closely with Product, Business, Implementation, and Client‑facing teams.
- Drive engineering best practices across development, testing, deployment, and operations.
Required Qualifications
- Bachelor's degree in Computer Science, Engineering, or related discipline.
- 5+ years of professional software engineering experience building enterprise‑grade applications.
- React.js
- Next.js
- TypeScript
- Strong backend development experience with:
- C#
- .NET
- Web API
- MVC Frameworks
- Extensive experience designing and implementing Microsoft Azure cloud solutions.
- Proven expertise with:
- System Design
- Design Patterns
- Security Architecture
- Scalable Distributed Systems
- Performance Optimization
- Experience working in highly regulated and compliance‑driven environments.
- Strong understanding of secure SDLC practices and software architecture principles.
- Experience using AI‑assisted development methodologies and agentic development workflows.
- Demonstrated experience integrating AI capabilities into production applications.