Backend .Net Developer

ipracujzdalnie.pl; Poznań; Remote; PLN 190,000 - 270,000; Full time

Benefits offered by this job

Attractive salary

Fully remote work option

Professional development opportunities

Impactful project work

Job summary

TeamQuest is a rapidly growing Polish HR consultancy delivering IT recruitment and integration services. We are seeking a Backend .NET Developer to design, implement and maintain integrations with external systems, APIs, and asynchronous data exchange for diverse clients.

The ideal candidate has 3-4 years in a similar role, strong C#/.NET, Docker, CI/CD, and experience with SOAP/XML and REST integrations. Remote work is possible, with collaboration across teams and clients.

Qualifications

• 3-4 years in a similar role
• Strong knowledge of C# and .NET (ASP.NET Core, .NET 8+)
• Practical experience with SOAP/XML integrations and REST
• Experience with asynchronous messaging patterns (RabbitMQ) and idempotency
• Good SQL/database knowledge
• Experience with Docker and CI/CD
• English for reading technical docs

Responsibilities

• Design and implement integrations with external systems (SOAP/XML, REST/JSON)
• Maintain asynchronous data exchange mechanisms (message queues, callbacks, statuses)
• Generate API clients from OpenAPI contracts and handle version changes
• Build mocks of external systems for test environments
• Implement business logic in a BPMN engine using C#
• Configure environments (Docker, CI/CD) and assist in releases
• Analyze defects from tests and production using logs; collaborate with analysts
• Document solutions and transfer knowledge within the team

Skills

C#/.NET

ASP.NET Core

REST/XML

OpenAI integrations

Asynchronous architecture

Database knowledge

Docker

CI/CD

Git (gitflow)

English documentation

Tools

Docker

RabbitMQ

Git

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.

Backend .Net Developer

location: Wrocław, Białystok, Kraków, Warszawa, Łódź, Katowice, Poznań, Rzeszów, Lublin, Gdańsk

Main Responsibilities

• Designing and implementing integrations with external systems (SOAP/XML and REST/JSON services), including data model mapping and partner error handling.
• Maintaining and developing an asynchronous data exchange mechanism (message queues, callbacks, statuses, request idempotency).
• Generating and updating API clients based on OpenAPI contracts provided by the client; responding to contract version changes.
• Building and maintaining mocks of external systems for test environments.
• Implementing business process logic in a BPMN engine (handlers in C#, process variables, signals) and decision rule models.
• Configuring environments (installation parameters, Docker, CI/CD pipeline), participating in preparing releases and hotfixes.
• Analyzing defects from business tests and production based on logs, quick fixes, collaborating with client analysts and testers.
• Documenting solutions and transferring knowledge within the team.

Requirements

• Minimum 3-4 years of experience in a similar position
• Very good knowledge of C# and .NET (ASP.NET Core, .NET 8 or newer)
• Practical experience with SOAP / XML integrations, REST/OpenAI integrations
• Asynchronous architecture - message queues (RabbitMQ or equivalent), request-callback pattern, idempotency, persistence of exchange state
• Good knowledge of databases
• Mapping of domain models
• Docker and CI/CD
• Git in gitflow model
• English language proficiency for reading technical documentation
• Communicative, open to collaboration with client-side personnelAbility to work independently

Good To Have

• Experience in the financial/banking industry or in projects for these industries

We Offer

• Attractive salary
• Possibility of fully remote work
• Real opportunity for professional development
• Possibility to genuinely influence the shape of projects