Backend .NET Developer
Posted Updated 3
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Summary
Fully remote backend role building .NET integrations with external systems (SOAP/XML and REST/OpenAPI services), async data exchange via message queues (RabbitMQ), BPMN process logic in C#, plus Docker and CI/CD — for a client in the financial/banking sector. B2B contract at 18k–23k PLN net/month.
Czym będziesz się zajmować?
Requirements:
- 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
Additional advantages:
- Experience in the financial/banking industry or in projects for these industries
Kogo poszukujemy?
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.
We offer:
- Attractive salary
- Possibility of fully remote work
- Real opportunity for professional development
- Possibility to genuinely influence the shape of projects
Czego wymagamy?
Znajomości:
- Databases
- .NET
- REST
- SOAP
- Docker
- Polski
- Angielski
Jakie warunki i benefity otrzymasz?
- 18k–23k PLN netto/m (B2B)
- B2B - Elastyczne godziny pracy (100%)
- Praca zdalna: W całości
- Pakiet medyczny, Pakiet sportowy
Kim jesteśmy?
Our client develops IT solutions, mainly for prestigious clients in the financial and automotive sectors.