Senior .NET Backend Engineer - Remote & OpenAPI Focus

ipracujzdalnie.pl; Rzeszów; Remote; PLN 140,000 - 180,000; Full time

Job summary

TeamQuest is a rapidly growing Polish company engaged in the comprehensive HR consulting services, in particular in the recruitment of IT professionals. Our client develops IT solutions, mainly for prestigious clients in the financial and automotive sectors.

We are looking for a Backend .NET Developer to join a distributed team. You will design integrations, work with asynchronous messaging and OpenAI-related tasks, and contribute to robust API solutions in a tech-forward environment.

Qualifications

• 3-4 years of experience in a similar position.
• Experience working with AI tools in development.
• Excellent knowledge of C# and .NET (ASP.NET Core, .NET 8 or newer).
• Practical experience with SOAP/XML and REST/OpenAI integrations.

Responsibilities

• Designing and implementing integrations with external systems (SOAP/XML and REST/JSON).
• Maintaining asynchronous data exchange via message queues and idempotent patterns.
• Generating and updating API clients from OpenAPI contracts provided by the client.
• Building mocks of external systems for test environments.
• Implementing business logic in a BPMN engine and decision models.
• Configuring environments (Docker, CI/CD) and assisting with releases.
• Analyzing defects from tests and production using logs for quick fixes.
• Documenting solutions and transferring knowledge within the team.

Skills

C# / .NET

Async architecture

REST / SOAP integrations

OpenAI / AI tools in development

English reading tech docs

Tools

Docker

CI/CD

Git (gitflow)

RabbitMQ

OpenAPI

Job description

TeamQuest is a rapidly growing Polish company engaged in the comprehensive HR consulting services, in particular in the recruitment of IT professionals. Our client develops IT solutions, mainly for prestigious clients in the financial and automotive sectors.

We are looking for a Backend .NET Developer to join a distributed team. You will design integrations, work with asynchronous messaging and OpenAI-related tasks, and contribute to robust API solutions in a tech-forward environment.