Job Title: Senior C# / .NET Backend Engineer (AWS Serverless & Stripe) – US HealthTech

Job Type: Contract / Temporary (Short-Term Project)

Location: Remote (Peru)

Schedule: Full-time / US Time Zone Alignment

Compensation: Competitive Rate in USD $2500-$3000

About the Role:

Hire Impulse is looking for a Senior C# / .NET Backend Engineer to join a short-term, high-impact HealthTech project for a US-based client. (+5 years of experience)

You will take direct technical ownership of an existing AWS serverless backend, maintaining complex multi-stage billing integrations, third-party vendor APIs, and enforcing strict engineering standards. This is a high-autonomy role requiring immediate onboarding and production-ready execution.

Key Responsibilities:
- Maintain, optimize, and scale serverless backend services using C# / .NET (version 8 or 9).
- Own and extend server-side Stripe integrations (webhooks, multi-tier shift counting, invoice items, per-facility billing logic).
- Architect and maintain third-party API integrations (Firebase Admin SDK for server-side push,



OAuth2 integrations, and pending Checkr background checks).
- Design relational database schemas and optimize query performance using Entity Framework Core (EF Core).
- Manage AWS Infrastructure as Code using SAM, CDK, or CloudFormation (Lambda, API Gateway, S3, IAM, Secrets Manager, CloudWatch/X-Ray).
- Drive clean code practices, strict GitHub PR discipline, and rigorous credential/repo security standards.
- Participate in daily syncs and technical discussions directly with the US engineering team in English.

Required Qualifications:
- 5+ years of software development experience with C# / .NET (8 or 9 preferred).
- 100% Fluent English (C1/C2 level) — Mandatory for daily technical syncs with US team.
- Proven production experience with AWS Serverless architecture (Lambda, API Gateway, SAM/CDK, CloudWatch).
- Advanced hands-on experience with server-side Stripe integrations (beyond standard Checkout;

📌 .NET Backend Engineer (Perú)
🏢 HIRE IMPULSE
📍 Perú