Senior .NET Engineer

1 day ago

Remote Gdynia Cracow Wrocław Krakow, Czech Republic N-iX Full time

5+ years of professional experience with C# and .NET, commercial experience with latest .Net Core versions Strong understanding of software architecture principles — SOLID, DDD, Clean Architecture, and design patterns. Proven experience optimizing .NET applications for performance and scalability, including diagnosing and resolving bottlenecks Experience in building and securing low-latency, high-throughput RESTful/GraphQL  APIs with ASP.NET Core (MVC/Minimal API, JWT/OIDC, Swagger) from scratch Hands-on experience with microservice based architecture, design and implementation of inter service integration/communication Proficiency in SQL/NoSQL databases, preferably PostgreSQL/DynamoDB, with hands-on experience in DB model design, EF Core and query optimization. Experience in local and distributed caching with Redis, Memcached or similar systems Experience with event-driven architectures and messaging systems (e.g., AWS SQS+SNS, RabbitMQ, or Kafka). Experience with cloud-based development with AWS/Azure/GCP Cloud, Docker, and CI/CD pipelines. Knowledge of testing practices (unit/integration testing, static analysis) and code quality standards. Understanding of security best practices (OWASP Top 10, secure coding, OAuth2). Exposure to observability tools like Serilog, OpenTelemetry, AWS Cloudwatch, etc. Strong problem-solving skills, sense of ownership, and ability to work in a collaborative, cross-functional team. Available for business trips to the customer side Nice to Have: Hands-on experience designing and developing APIs for native mobile applications with offline mode support (iOS/Android) Our customer is a leading provider of onboard retail technology and mobile solutions for the travel and retail industries. The company designs and builds digital products that transform how airlines, trains, and retailers manage in-motion sales, inventory, and customer experiences.  ,[Design, develop, and maintain scalable backend services using .NET and C#., Implement clean, maintainable, and testable code following best practices and design principles., Build and expose secure APIs and integrate with external systems and services., Design and optimize data access layers using EF Core and SQL/NoSQL databases., Contribute to architecture decisions, ensuring performance, scalability, and reliability., Implement monitoring, logging, and alerting to maintain system health and observability., Collaborate with cross-functional teams to deliver features from concept to production., Participate in code reviews, and continuous improvement of development processes.] Requirements: .NET, C#, .NET CORE, Kubernetes, CI/CD, AWS, Docker, Kafka, REST API, GraphQL, MVC, API, SQL, NoSQL, EF Core, Redis, AWS SQS, RabbitMQ, Cloud, CD pipeline, Testing, Integration test, Security, Amazon CloudWatch Tools: Agile, Scrum. Additionally: Flexible working hours and remote work possibility, Training budget, International projects, referal program, Tech community, Free coffee, Kitchen, Modern office.

  • Senior .NET Engineer

    2 weeks ago

    Remote, Wrocław, Gdańsk, Cracow, Warszawa, Czech Republic N-iX Full time

    Requirements Bachelor’s or Technical Degree in Computer Science, Software Engineering, or related field (or equivalent practical experience). 5+ years of professional experience as a backend engineer. Strong knowledge of C# (OOP, inheritance, polymorphism, async programming). Experience with .NET Core, ASP.NET Web API, RESTful services. Hands-on...

  • Senior .Net Software Engineer @ uSoftware

    1 day ago

    Remote, Czech Republic uSoftware Full time

    Qualifications  8+ years of experience with C#, ASP.NET MVC and WebAPI Solid experience with SQL Server, including hand-written queries, relational database design Knowledge of RESTful services Experience with data pipeline engineering, database design, web platform development, API design, or distributed systems Web development using HTML5, CSS,...

  • Senior DevOps Engineer @ N-iX

    7 days ago

    Remote, Gdynia, Cracow, Wrocław, Krakow, Czech Republic N-iX Full time

    You enjoy automating processes to create more efficient workflows. You have 6+ years of experience. You are familiar with Continuous Integration and Continuous Development pipelines. You possess strong knowledge and hands-on experience with Amazon Web Services (AWS); this includes proficiency in managing and deploying applications on AWS, utilizing various...

  • Senior .Net Tech Lead @ Link Group

    3 days ago

    Remote, Czech Republic Link Group Full time

    Minimum 6 years of software development experience. Proven experience building and maintaining large-scale web applications and SaaS solutions. Proficient in C#, .NET Core, and .NET Framework. Good understanding of REST architecture and WebAPI design. Experience writing unit tests (NUnit, Moq, Jest). Ability to work with distributed code repositories (Git)....

  • Senior Application Support Engineer

    5 days ago

    Remote, Czech Republic ITMAGINATION Full time

    At least 6–8+ years in L3 application support. Strong in .NET/C++/COM, debugging, log analysis, and SQL diagnostics. Scripting/automation (e.g., PowerShell or Python). Incident/problem management and RCA practice under ITIL. Enterprise, mission-critical environment experience; clear written documentation. German B2+ and English B2+ Monitoring/APM (e.g.,...

  • Senior Full Stack Developer

    5 days ago

    Remote, Wrocław, Krakow, Trójmiasto, Czech Republic N-iX Full time

    At least 4 years of commercial experience as Full Stack Software Developer. Proficient in TypeScript/JavaScript, Azure Functions. Backend expertise with .NET, RESTful API development, authentication, and authorization. Frontend development with React, Composition API, and internationalization. Strong debugging and optimization skills across full stack....

  • Senior .NET Tech Lead @ Experis Polska

    3 days ago

    Remote, Warszawa, Czech Republic Experis Polska Full time

    Requirements: Minimum 6 years of hands-on experience in software development.  Proven experience building and maintaining large web applications and SaaS solutions.  Strong proficiency in C#, .NET Core, and .NET Framework.  Good understanding of RESTful architecture and WebAPI development.  Experience with unit testing frameworks: NUnit, Moq,...

  • Senior .NET Software Developer @ Antal

    2 weeks ago

    Remote, Warszawa, Czech Republic Antal Full time

    Minimum 7 lat doświadczenia komercyjnego w programowaniu. Bardzo dobra znajomość C# i .NET Framework (4.0–4.7). Solidne podstawy OOP oraz wzorców projektowych. Doświadczenie w pisaniu testów jednostkowych (xUnit, NSubstitute lub podobne). Znajomość Git Flow, Git, JIRA, Confluence, code review. Dobre umiejętności analityczne, umiejętność pracy...

  • Senior .NET Developer @ Devire

    5 days ago

    Remote, Czech Republic Devire Full time

    Minimum 5 lat doświadczenia w pracy z C# i technologiami .NET (preferowane .NET 8/.NET Core). Znajomość relacyjnych baz danych (PostgreSQL, MS SQL Server). Praktyczne doświadczenie z zasadami Domain-Driven Design (DDD). Doświadczenie w budowie i rozwoju rozproszonych systemów mikroserwisowych. Znajomość wzorców komunikacji i architektury...

  • Senior AQA Engineer

    3 days ago

    Remote, Warsaw, Wrocław, Cracow, Czech Republic N-iX Full time

    5+ years of experience in testing (with at least 3 years in UI/API automation). Sound knowledge and experience of Web Application testing including API testing using Rest #. Experience using C# language. Experience with software QA processes, methodologies, and tools. Sound knowledge of SQL server and TSQL, Visual Studio, Git, Selenium, Xray and Page Object...