Senior .NET Developer with AWS and React (f/m/x)

Sii Ukraine LLC; Polska; Hybrid; PLN 150,000 - 210,000; Full time

Job summary

Sii is seeking a Senior .NET Developer with AWS and React to join our global team in Poland. You will design scalable architectures, contribute to the cloud transformation of a data-intensive platform, and modernize legacy components to ensure performance and reliability.

You will collaborate with engineers, analysts and quality teams, apply SOA concepts, and promote best practices in software design. The role requires deep .NET expertise, AWS experience, and hands-on in Redux and Context API

Qualifications

• Minimum 5 years of software development experience focusing 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.

Job description

Senior .NET Developer with AWS and React (f/m/x)

This offer base language is English. Translate into Ukrainian.

We are looking for a Senior .NET Developer to join our team and contribute to the cloud transformation of a data-intensive analytical platform. In this role, you will collaborate with innovative and diverse professionals from around the world, designing scalable architectures and modernizing legacy components to ensure performance and reliability.

• 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

Requirements

• 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

Nice to have

• Experience with C#

Job no. JOB-973G4

Sii ensures that all hiring decisions are made solely on the basis of qualifications and competence. We are committed to equal and fair treatment of all, regardless of legally protected characteristics. At Sii, we promote a diverse and inclusive work environment, in full compliance with applicable anti-discrimination laws.