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Senior .NET Developer

Career Level:  07 Specialist
Posting Date:  5 Aug 2025

Senior C# .NET Developer

Cracow, Poland

2 days on site

Join a rapidly growing group of technology companies working together to build a brilliant fintech payments business. As we continue to enhance the platform and accelerate delivery with additional development teams, we require a Senior .NET Developer to work as part of our development team to assist with delivering new product features and capability.

 

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, Javascript, CSS 
  • Databases: AWS Aurora PostgreSQL, AWS DynamoDB, AWS DocumentDB, AWS ElastiCache Redis 
  • Cloud Infrastructure: AWS (API Gateway, Fargate, SQS, SNS, KMS, SecretManager, Cognito, Lambda (Python), etc), Localstack, Docker 
  • Analyse business requirements, internal designs and non-functional requirements and estimate user stories collaboratively with the team. 
  • Advocate of development practices including TDD/BDD & DDD. 
  • Follow industry best practices, coding guidelines and secure development practices, and ensure other members of the team do likewise. 

  • Follow lean/agile principles and help to continually improve processes and practices. 

 
Required skills and experience: 
  • Professional level (5+ years' experience) as a Developer within a modern software environment 
  • Strong Web API experience 
  • Experience in asynchronous, multi-threaded & parallel programming 
  • Strong experience in SQL & NoSQL databases 
  • Experience in improving, refactoring and rewriting code 
  • Deep understanding of design patterns 
  • Experience using CI/CD build and deployment pipelines. 
  • Experience of secure coding practices, OWASP Top 10, etc. 
 

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