C# Developer Mid/Senior

Infotree Global Solutions; Katowice; On-site; PLN 180,000 - 240,000; Full time

Job summary

A technology solutions company in Katowice is looking for a motivated .NET Developer to join their team. In this role, you will deliver robust, cloud-native features while collaborating with various specialists. Ideal candidates should have strong skills in C# and .NET, with experience in Web APIs and modern software methodologies. The position offers a hybrid work schedule with at least one day in the office per week.

Qualifications

• 2+ years' experience for Mid or 5+ years for Senior in a modern software environment.
• Experience in secure coding practices, OWASP Top 10.
• Strong experience in asynchronous programming and multi-threaded programming.

Responsibilities

• Collaborate to develop and deliver new product features using C# and .NET.
• Follow coding guidelines and ensure secure development practices.
• Understand and contribute to technology trends and strategies.

Skills

C#

.NET

Strong Web API experience

MassTransit

SQL & NoSQL databases

Job description

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At Infotree, meeting your career needs is a top priority. Client satisfaction is largely dependent on the resources we can provide, and we take pride in our delivery. We have a supportive team in place to give quality people a chance to grow and challenge themselves in their roles which has resulted in that we have placed many employees in positions that have grown into lifelong careers.

We have a team of dedicated recruiters and consultant care representatives that are committed to your success and well-being. Check out our open roles to get started.

Infotree Poland Sp. z o.o. is part of Infotree Global Solutions. Agency number: 15970.

We are looking for a motivated .NET Developer to join our cross-functional team and contribute to the delivery of robust, cloud-native features for our platform. You’ll work alongside Solution Architects, Product Owners, Developers, DevOps engineers, and QA Automation Engineers to build scalable backend solutions and services.

This role is ideal for someone who is technically curious, values clean and secure code, and enjoys working collaboratively in an Agile environment.

Key Accountabilities:

• Collaborate with Solution Architects, Product Owners, Developers, DevOps and QA Automation Engineers to contribute to the development and delivery of new product features using the following technologies:
• Languages: C#, .NET, Typescript
• Analyse business requirements, internal designs and non-functional requirements and estimate user stories collaboratively with the team.
• Follow industry best practices, coding guidelines and secure development practices, and ensure other members of the team do likewise.
• Understand and maintaining awareness of technology, software design and development methodology trends and contribute to strategy through the suggestions of suitable solutions to meet business / product needs.
• Follow lean/agile principles and help to continually improve processes and practices

Required Skills

• Professional level:2+ years' experience- Mid or 5 years+ -Senior,as a Developer within a modern software environment
• C# with .NET (latest LTS)
• Strong Web API experience
• Minimal APIs for lightweight, high-performance endpoints
• MassTransit for message-based communication and integration with message brokers like RabbitMQ or Azure Service Bus
• MediatR to promote clean separation of concerns through in-process messaging (CQRS-style)
• Domain-Driven Design (DDD) principles to model complex business domains
• Event-Driven Architecture with asynchronous messaging and integration
• Asynchronous programming throughout for responsiveness and scalability, multi-threaded & parallel programming
• Strong experience in SQL & NoSQL databases
• Experience in improving, refactoring, and rewriting code
• Understanding of design patterns
• Experience using CI/CD build and deployment pipelines.
• Experience in secure coding practices, OWASP Top 10, etc.

Required behaviors and attributes:

• Excellent knowledge of software development methodologies and techniques
• Strong analytical and problem-solving skills

Optional / Nice-to-Have Skills:

• Payment industry experience is advantageous
• Experience with CQRS would be advantageous

Hybrid work from Cracow with a minimum of 1 day per week is preferred here, but the client will consider fully remote working candidates as well.