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

Sii Poland

Szczecin

On-site

PLN 180,000 - 240,000

Full time

14 days+

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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

Tools

Job description

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.

Your tasks

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-KF82T

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.

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