Senior .NET Developer

Appcircle Inc.; United States; On-site; USD 100,000 - 130,000; Full time

Job summary

Appcircle Inc. is seeking a Senior .NET Developer to design and develop scalable, secure backend systems and REST APIs. In this position, you will lead architectural decisions, mentor junior developers, and ensure high coding standards while building a product trusted by mobile teams worldwide.

The ideal candidate will have at least 5 years of .NET experience, proficient in API security, and popular tools like Kafka and Docker. Join us to improve development processes and deliver high-quality results.

Qualifications

• Minimum of 5 years of professional experience in .NET development.
• Advanced knowledge of .NET Core 8 and extensive experience in RESTful API design and implementation.
• Strong communication skills and ability to collaborate with diverse teams.

Responsibilities

• Architect, design, and develop REST APIs using .NET Core 8.
• Lead the implementation of solutions using Hexagonal Architecture and DDD.
• Provide technical guidance and mentorship to junior and mid-level developers.

Skills

API security protocols

RESTful API design

Code reviews

Mentorship

Problem-solving

Linux environments

Tools

Kafka

Redis

MongoDB

PostgreSQL

Docker

Kubernetes

Job description

We are looking for a Senior .NET Developer who will design and develop scalable, secure backend systems and REST APIs. You'll lead architectural decisions using modern design principles, mentor junior and mid-level developers, and ensure high coding standards across the team, all while building a product trusted by mobile teams worldwide.

Responsibilities

• Architect, design, and develop REST APIs using .NET Core 8, ensuring high performance and scalability.
• Lead the implementation of solutions using Hexagonal Architecture, DDD, and EDA principles.
• Provide technical guidance and mentorship to junior and mid-level developers.
• Collaborate with cross-functional teams to design and deliver robust, secure, and reliable systems.
• Work extensively with Kafka, Redis, Keycloak, MongoDB, and PostgreSQL to develop and maintain complex integrations.
• Ensure adherence to coding standards and best practices, including clean code and secure development practices.
• Conduct code reviews and participate in architectural discussions.
• Troubleshoot and resolve complex technical challenges.
• Contribute to the continuous improvement of development processes and tools.

Requirements

• Minimum of 5 years of professional experience in .NET development.
• Advanced knowledge of .NET Core 8 and extensive experience in RESTful API design and implementation.
• Proven expertise in Hexagonal Architecture, Domain-Driven Design, and Event-Driven Architecture.
• Strong background in working with Kafka, Redis, Keycloak, MongoDB, and PostgreSQL.
• Deep understanding of API security protocols (e.g., OAuth2, JWT) and performance optimization.
• Proficiency with Linux environments, including system administration tasks (e.g., managing services, permissions, shell scripting, basic networking).
• Experience with containerization tools like Docker and orchestration platforms like Kubernetes.
• Proficiency in CI/CD pipelines and DevOps practices.
• Strong problem-solving skills with the ability to handle complex and ambiguous challenges.
• Excellent communication skills and ability to collaborate with diverse teams.
• Ability to take ownership of projects and deliver high-quality results.

An Advantage If You Have

• Experience with microservices architecture.
• Knowledge of advanced testing strategies, including TDD and automated testing.
• Familiarity with event sourcing and CQRS patterns.