Senior .NET Developer with React (LATAM, Native English Required) full time

Job Title: Senior .NET Developer with React (LATAM, Native English Required)

Company: AstroSirens, USA

Location: Remote – LATAM Region (US Timezone Working Hours)

Type: Full-time, Long-term Contract

Pay: $2,500 – $3,500 USD/month (depending on experience)

Contact: ezhang@astrosirens.com

AstroSirens is a US-based IT consulting and staffing firm that connects top engineering talent from Latin America with innovative companies in the United States. We specialize in remote placements for long-term software development roles. Our clients range from early-stage startups to large-scale enterprise tech companies. We focus on building distributed teams that thrive in highly collaborative environments.

We are looking for a Senior .NET Developer with React experience to join one of our US-based client projects. This is a full-time, remote role open to candidates based in the LATAM region who can work during US business hours. You will be working on a product development team focused on building scalable, user-friendly applications.

> ⚠️ Note: Native or near-native English communication skills are mandatory for this position. Daily interaction with US clients is required.

• Design and build backend services using ASP.NET Core or MVC
• Develop frontend components using React.js
• Integrate APIs and work with relational databases like SQL Server
• Write clean, scalable, and secure code
• Collaborate with cross-functional teams across time zones
• Participate in code reviews, sprint planning, and architecture discussions
• Ensure high-quality delivery through testing and documentation
• 7+ years of professional experience with .NET development
• Strong proficiency in C#, ASP.NET MVC/Core
• Production-level experience with React.js, JavaScript/TypeScript
• Experience working with Azure, Git, and CI/CD pipelines
• Understanding of RESTful APIs, database design, and ORM frameworks
• Fluent English (native or near-native) — both written and spoken
• Comfortable working independently and proactively in remote teams
• Applicants must be located in Latin America (LATAM)
• Must be available to work during standard US business hours (9 AM – 5 PM EST/PST depending on the team)
• Long-term (12+ months)
• Full-time (40 hours/week)