Senior .NET Developer for Cloud‑Driven Data Platform

Sii Poland; Szczecin; On-site; PLN 180,000 - 240,000; Full time

Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

Regular integration events and trips

Modern offices

Job summary

Sii Poland is seeking a Senior .NET Developer in Szczecin to lead cloud transformation of a data-intensive analytical platform and to design scalable architectures while modernizing legacy components for performance and reliability.

You will collaborate with a diverse team, apply SOA concepts, and contribute to ongoing technological evolution by adopting modern frameworks and best practices. Fluent English is required.

Qualifications

• Minimum 5 years of experience in software development with a strong focus on .NET technologies.
• Deep expertise in designing and implementing web services.
• Practical experience with AWS and cloud environments.
• Hands-on mastery of Redux and Context API in React applications.
• Strong understanding of software design principles and best practices.
• Advanced level of English.

Responsibilities

• Contributing to the cloud transformation of a data-intensive analytical platform by designing scalable architectures and modernizing legacy components
• Ensuring continuous technological evolution of the product by proposing and implementing modern frameworks and architectural improvements
• Applying Service Oriented Architecture (SOA) concepts in software design and development
• Providing timely and courteous support to platform users, ensuring issues are understood, analyzed, and resolved promptly
• Collaborating closely with a team of software engineers, analysts, and quality engineers to design and build software solutions that meet business needs
• Adhering to team design and coding procedures and standards

Skills

.NET technologies

Web services

AWS

Redux

Context API

Advanced English

C#

Tools

C#

Job description

Sii Poland is seeking a Senior .NET Developer in Szczecin to lead cloud transformation of a data-intensive analytical platform and to design scalable architectures while modernizing legacy components for performance and reliability.

You will collaborate with a diverse team, apply SOA concepts, and contribute to ongoing technological evolution by adopting modern frameworks and best practices. Fluent English is required.