Senior Back-end Engineer – .NET + Integración AI (Migración

Experience and Skills

• 8+ years of backend development experience, with recent hands-on expertise in .NET 8+ and modern hosting models.
• C1 English level or higher.
• Proven experience leading at least two complete legacy migration cycles in regulated industries such as fintech, taxes, or healthcare.
• Deep understanding of .NET fundamentals, including .NET Standard compatibility, GC behavior, async patterns, and memory allocation minimization.
• Advanced database and ORM experience, specifically with EF Core, Dapper, SQL Server or MySQL, and high-volume bulk operations.
• Strong background in distributed systems architecture, including CQRS, event-driven messaging (SQS, Azure Service Bus, or RabbitMQ), and Redis caching.
• Experience with migration patterns such as Strangler Fig, Golden Master testing, and parallel runs.
• Daily experience using Claude Code with structured workflows, token management strategies, and Model Context Protocol (MCP) architectures.

Skills

• .NET 8
• C#
• EF Core
• Dapper
• SQL Server
• MySQL
• CQRS
• Redis
• AWS SQS
• Azure Service Bus
• Claude Code
• MCP

Projects

This role is designed for a Senior Backend Engineer to lead a critical, zero-downtime migration of legacy backend systems using a Strangler Fig approach. You will own the data access layer, design production-grade REST APIs in .NET 8+, and integrate business logic with AI agents by exposing secure endpoints as Model Context Protocol (MCP) tools. Operating in a highly regulated domain, you will make independent architectural decisions to ensure system resilience, high performance, and seamless parallel runs. You will collaborate closely with AI engineering teams to build modern, AI-assisted workflows. This is a highly autonomous position requiring deep technical expertise in .NET internals, distributed systems, and modern AI development tools. Your impact will directly shape the scalability and future-proofing of core business logic during peak seasonal traffic.

Key Responsibilities

• Lead the incremental migration of legacy backend systems using the Strangler Fig pattern, feature flags, and parallel runs to ensure zero client-visible incidents.
• Design and implement production-grade REST APIs in .NET 8+ using Clean Architecture, DDD, and CQRS principles.
• Expose backend endpoints as secure and reliable MCP tools for AI agents to consume business logic.
• Own the data access layer, utilizing EF Core for domain operations and Dapper for high-performance read paths.
• Design caching strategies, messaging patterns, and asynchronous processing to handle seasonal traffic spikes.
• Implement idempotency, observability, circuit breakers, and other resiliency patterns from day one.
• Proactively communicate migration scope, technical risks, and trade-offs to non-technical stakeholders.
• Collaborate daily with AI engineering teams to align on backend and AI integration decisions.

Benefits

We provide the opportunity to participate in impactful and technically rigorous industrial data projects that drive innovation and professional growth. Our work environment emphasizes technical excellence, collaboration, and continuous innovation.

Niuro supports a 100% remote work model, allowing flexibility in work location globally. We invest in career development through ongoing training programs and leadership opportunities, ensuring continuous growth and success.

Upon successful completion of the initial contract, there is potential for long-term collaboration and stable, full-time employment, reflecting our long-term commitment to our team members.

Joining Niuro means becoming part of a global community dedicated to technological excellence and benefiting from a strong administrative support infrastructure that enables you to focus on impactful work without distraction.

Nice to Have

• LangChain
• RAG
• Datadog
• OpenTelemetry
• Terraform
• Docker
• Kubernetes
• AWS