Senior .NET Backend Engineer – Remote & Growth

Openkrill; United States; Hybrid; USD 110,000 - 170,000; Full time

Benefits offered by this job

Premium medical package

Lunch tickets

Bookster subscription

13th salary

International exposure

Flexible remote work

Job summary

Qualysoft is seeking a senior backend developer to design, build, and maintain scalable C#/.NET Core services and REST APIs. You will translate business requirements into robust software, integrate with Kafka-based messaging, and ensure secure, well-documented solutions in enterprise environments.

Contribute to architecture, tests, and CI/CD practices while working with Oracle databases and modern containers. Flexible remote options are offered to support a diverse international team.

Qualifications

• Minimum 7 years of professional software development experience in enterprise environments.
• Minimum 5 years of hands-on backend development experience with C# and .NET / .NET Core.
• Minimum 3 years of hands-on experience with ASP.NET Core.
• Minimum 3 years of experience designing and implementing REST APIs and system-to-system integrations.
• Minimum 2 years of practical experience with relational databases, including Oracle and SQL.
• Minimum 2 years of experience with messaging or event-driven solutions, preferably Apache Kafka.
• Minimum 2 years of experience with Docker and container orchestration platforms such as Kubernetes or OpenShift.
• Proven experience delivering business-critical enterprise applications through the full software delivery lifecycle.
• Experience in banking, financial services or another highly regulated industry is strongly preferred.

Responsibilities

• Design, develop and maintain backend applications and services using C#, .NET and ASP.NET Core.
• Analyze business and technical requirements and translate them into clear, maintainable and testable solutions.
• Design and implement REST APIs and system-to-system integrations with clear, versioned contracts.
• Contribute to reusable integration capabilities and avoid point-to-point solutions where a generic service is appropriate.
• Design and implement synchronous, asynchronous and event-driven interaction patterns.
• Integrate applications using Kafka or equivalent enterprise messaging platforms.
• Develop and optimize database interactions with Oracle and other relational databases.
• Apply architectural patterns including Clean Architecture, DDD and event-driven architecture.
• Implement authentication and authorization mechanisms using OAuth 2.0, JWT and enterprise access-management solutions.
• Build automated unit, component and integration tests with xUnit, NUnit, Moq or equivalents.
• Participate in code reviews and uphold clean code, security, performance standards.
• Containerize applications and support delivery through Docker and OpenShift/Kubernetes-based platforms.
• Contribute to CI/CD and build automation using GitHub Actions or equivalents.
• Implement logging, metrics and distributed tracing aligned with observability standards.
• Identify and resolve scalability, reliability and performance issues during development and testing.
• Create and maintain technical documentation, API specs and implementation notes.
• Use enterprise-approved generative AI tools responsibly to improve productivity.

Skills

C#

ASP.NET Core

Docker

Kubernetes/OpenShift

Apache Kafka

SQL

Tools

Oracle

SQL

Job description

Qualysoft is seeking a senior backend developer to design, build, and maintain scalable C#/.NET Core services and REST APIs. You will translate business requirements into robust software, integrate with Kafka-based messaging, and ensure secure, well-documented solutions in enterprise environments.

Contribute to architecture, tests, and CI/CD practices while working with Oracle databases and modern containers. Flexible remote options are offered to support a diverse international team.