Senior .NET Back-end Engineer (Modern Platform)

Experience and Skills

• Senior backend engineer with 8+ years of software development experience, including 4+ recent years with modern C#/.NET.
• C1 English level or higher.
• Strong practical knowledge of async/await, dependency injection, concurrency, background workers, and .NET troubleshooting.
• Advanced Entity Framework Core and Dapper experience, including tracking, DbContext lifetime, and transactions.
• Hands-on experience with distributed systems, messaging or queues such as AWS SQS, idempotency, retries, consistency, and failure handling.
• Experience with CQRS, Redis, AWS, and relational databases, preferably PostgreSQL.
• Proven ability to own technical decisions and deliver projects end to end.
• Hands-on experience with Claude Code or similar AI coding agents, including context management, subagents, token usage, and output validation.
• Hands-on experience with ASP.NET Core, Amazon SQS.

Skills

• C#
• ASP.NET Core
• Entity Framework Core
• Dapper
• AWS
• Amazon SQS
• PostgreSQL
• Redis
• CQRS
• Distributed Systems
• Async/Await
• Concurrency
• Background Workers
• Dependency Injection
• Claude Code
• Claude

Key Responsibilities

• Clarify business problems with Product and stakeholders, investigate legacy behavior, and define clear acceptance criteria.
• Design and build backend services, including website and calculation APIs that communicate through asynchronous workflows.
• Develop reliable distributed processing with concurrent workers, duplicate and out-of-order messages, retries, dead-letter queues, and exactly-once effects on tax and financial data.
• Create technical plans that explain risks and trade-offs, secure approval, and drive implementation through production.
• Use Claude Code as part of daily engineering work, reviewing and validating generated solutions for correctness, security, and maintainability.
• Troubleshoot production incidents and help maintain service reliability during tax season.

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

• Outbox Pattern
• Transactional Messaging
• .NET Framework Migration
• React
• Next.js
• MCP
• Financial Systems
• Regulated Domains

We are looking for a Senior .NET Backend Engineer to help build a modern, distributed platform for tax preparation software. You will work across backend services, business rules, asynchronous workflows, and financial data integrity while helping rebuild the core system with modern .NET and AWS. This role requires strong ownership. You will investigate ambiguous requirements, understand tax and business rules, define technical solutions, evaluate trade-offs, and drive implementation with limited supervision. You will also support production incidents during tax season and use AI-assisted engineering tools responsibly, validating their output before delivery.