Backend .Net Developer

ipracujzdalnie.pl; Kraków; Remote; PLN 120,000 - 180,000; Full time

Benefits offered by this job

Attractive salary

Possibility of fully remote work

Real opportunity for professional dev

Influence project shape

Job summary

TeamQuest is a rapidly growing Polish company delivering HR consulting and IT recruitment services. They client IT solutions for top clients in finance and automotive sectors. Backend .Net Developer role involves designing integrations, asynchronous data exchange, OpenAPI client generation, and release support.

Wrocław, Kraków and other cities are mentioned as locations, with remote work possible. The candidate should have strong C#/.NET skills, experience with SOAP/XML, REST, Docker, CI/CD, and

Qualifications

• 3-4 years of experience in a similar position.
• Strong C# and .NET knowledge (ASP.NET Core, .NET 8+).
• Hands-on experience with SOAP/XML and REST integrations.
• Experience with asynchronous architectures, message queues and idempotent exchanges.
• Familiarity with Docker, CI/CD and Git workflows.
• Good command of English for reading technical documentation.

Responsibilities

• Designing and implementing integrations with external systems (SOAP/XML and REST/JSON).
• Maintaining asynchronous data exchange mechanisms and idempotent processing.
• Building API clients from OpenAPI contracts and adapting to changes.
• Creating mocks of external systems for tests.
• Coding BPMN handlers in C# and working with the CI/CD pipeline.
• Analyzing defects from tests and production, collaborating with analysts.
• Documenting solutions and sharing knowledge with the team.

Skills

C#

ASP.NET Core

.NET 8+

SOAP/XML integrations

REST/OpenAI integrations

Asynchronous architecture

RabbitMQ

Git (gitflow)

CI/CD

Docker

English technical docs

Independent work

Tools

Docker

Git

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. 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 personnel
• Ability 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