Senior .Net Developer

About the project

You will lead the technical development of a new backend platform serving as the operational core of a nationwide logistics ecosystem. The system will manage complex business logic, large-scale integrations, and communication between multiple systems and applications. As Senior .NET Developer, you’ll play a key role in architecture decisions, performance optimization, and mentoring the development team.

Project duration: approx. 12 months with the possibility of extension.

Please note: After the first three months of cooperation, participation in a standby/on-call rotation (including 24/7 availability) will be required.

Tasks

• Define and lead the backend system architecture to ensure scalability, reliability, and maintainability

• Build and optimize RESTful APIs using .NET 8 and ASP.NET Core

• Design and implement complex business logic following DDD principles

• Oversee integrations with enterprise systems (REST/SOAP, SAP/WMS, authorization services)

• Collaborate on infrastructure setup and DevOps pipelines (Docker, RabbitMQ, Redis)

• Ensure system performance and resilience across thousands of concurrent users

• Conduct code reviews and provide technical mentorship to junior and mid-level developers

• Work closely with the product and operations teams to deliver high-quality, production-ready solutions

Must have

• 5+ years of professional experience in .NET backend development

• Strong command of C#, ASP.NET Core, and REST API architecture

• Proven experience designing system architecture and database-based solutions

• Advanced knowledge of SQL Server, Entity Framework Core, Docker, and microservices design

• Familiarity with caching (Redis), messaging systems (RabbitMQ), and CI/CD pipelines

• Strong grasp of coding frameworks (xUnit), and clean code principles

• Excellent analytical thinking, communication, and leadership skills

• Polish language proficiency at C1 level, English at B2+

Nice to have

• Experience with GCP/AWS, Terraform, and monitoring tools (NewRelic, DataDog)

• Awareness of API security and cloud best practices

• Experience in AI-powered code completion and assistance tools such as GitHub Copilot and Tabnine

• Proficiency in modern AI-enhanced IDEs, including JetBrains IDEs, CLion, and Fleet

• Familiarity with AI-assisted test generation and debugging tools, such as Qoda

What do we offer?

• ambitious, creative, talented & highly experienced team

• contributing to projects for clients all over the world

• flexible working hours and a possibility to work remotely

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The controller of your personal data is Miquido Spółka z ograniczoną odpowiedzialnością sp. k. with its seat in Krakow, Zabłocie 43a, 30-701 Kraków, Poland (“Miquido”, “We”, “Our” or “Us”). See more