Backend .Net Developer

ipracujzdalnie.pl; Województwo wielkopolskie; Remote; PLN 150,000 - 240,000; Full time

Benefits offered by this job

Attractive salary

Possibility of fully remote work

Professional development opportunities

Influence on project shape

Job summary

TeamQuest, a rapidly growing Polish HR tech consultant, seeks a Backend .NET Developer for multi-location teams. You will design and implement integrations with external systems, maintain asynchronous data exchanges, and generate API clients from OpenAPI contracts.

You will also configure Docker environments, participate in CI/CD, and troubleshoot production issues. The role requires 3–4 years in a similar role, strong C#/.NET skills (ASP.NET Core, .NET 8+), experience with SOAP/XML and

Qualifications

• Minimum 3–4 years of experience in a similar position.
• Experience working with AI tools in development.
• Strong 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, callbacks, idempotency, state persistence.
• Good knowledge of databases and domain model mapping.
• Docker and CI/CD
• Git in gitflow model.
• English language proficiency for reading technical documentation.

Responsibilities

• Designing and implementing integrations with external systems (SOAP/XML and REST/JSON).
• Maintaining asynchronous data exchange mechanisms (queues, callbacks, idempotency).
• Generating/updating API clients from OpenAPI contracts; handling version changes.
• Building and maintaining mocks of external systems for tests.
• Implementing business logic in a BPMN engine and decision rules.
• Configuring environments (Docker, CI/CD) and participating in releases.
• Analyzing defects from tests/production and applying quick fixes.
• Documenting solutions and sharing knowledge within the team.

Skills

C# & .NET

SOAP/XML integrations

REST/OpenAI integrations

Asynchronous architecture

RabbitMQ

Docker

CI/CD

Git (gitflow)

Databases

English (technical)

Independent work

Team collaboration

Tools

RabbitMQ

Docker

CI/CD

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

Tasks

• 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.

We Expect You Have

• Minimum 3-4 years of experience in a similar position
• Experience working with AI tools in development
• 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

Nice To Have

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

We Can Offer You

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