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Senior .NET Fullstack Engineer

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N-iX

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Location:
Poland

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Contract Type:
Not provided

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Salary:

Not provided

Job Description:

This is a great opportunity for an experienced Senior Full Stack Developer to join our Software Development team, being part of one of our existing scrum teams. Each agile team includes technical leadership, development, architecture, quality, product and project management roles. We are looking for a Senior Full Stack Developer comfortable with C# and Angular, with a proven history of building high-performance apps with a strong focus on system integrations and API-driven solutions.

Job Responsibility:

  • Work on business requests and development improvements
  • Develop, test, document and maintain our application back end build scalable and reusable code
  • Provide realistic estimates for requests, fixes and new ideas
  • Create unit tests
  • Write clear and precise technical documentation
  • Manage realistic work deadlines
  • Participate in all the scrum ceremonies and be part of the team performance and continuous improvement
  • Design and maintain integrations between internal and external systems
  • Develop and evolve RESTful APIs used for system-to-system communication
  • Ensure reliability, performance, and data consistency across integrations
  • Own integration-related technical decisions, including security and data exchange approaches

Requirements:

  • 5+ years of experience of Microsoft development stack including
  • .NET C#, SQL Server T-SQL
  • .Net Core SQL Server, HTML, CSS, Javascript, Git, Angular
  • Azure, .NET core, SOLID principles, Microservices architecture, Design principles, Jira
  • Strong experience in API design and backend integrations
  • Hands-on experience integrating with third-party systems
  • Good understanding of authentication and authorization mechanisms (OAuth2, JWT, API keys)
  • Experience with asynchronous or event-driven communication patterns
  • Experience working with Scrum methodology in a variety of contexts
  • Self-organising problem solver
  • Able to think outside the box (open thinking)
  • Strong ability to work effectively in a team
  • Encourage and drive others to deliver high-quality, cutting-edge software
  • Attention to detail and have a proactive ethos
  • Always looking for continuous improvement
  • Excellent verbal and written communication skills, in English

Nice to have:

Up to 1 year of experience with GenAI

What we offer:
  • Flexible working format - remote, office-based or flexible
  • A competitive salary and good compensation package
  • Personalized career growth
  • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
  • Active tech communities with regular knowledge sharing
  • Education reimbursement
  • Memorable anniversary presents
  • Corporate events and team buildings
  • Other location-specific benefits

Additional Information:

Job Posted:
March 19, 2026

Work Type:
On-site work
Job Link Share:

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