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Offer summary
(Summary generated by AI based on the full job description)
The project involves cloud transformation of a data-intensive analytical platform. Key technologies include .NET, AWS, Redux, Context API in React. Responsibilities cover designing scalable architecture, modernizing legacy components, implementing SOA, and providing user support. Knowledge of software design principles and teamwork with engineers and analysts is required.
from: 29 July 2026
to: 28 August 2026
salary not specifiedcontract of employment (full-time)
Offer parameters
level:senior
working mode:remote • hybrid • full office
Białystok, Centrum
Requirements
Expected technologies
.NET
Web Services
AWS
Redux
Context API (React)
Optional technologies
C#
Microsoft Windows
Our 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
Optional
- Experience with C#
Your 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
About the project
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.
What we offer
- Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
- Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
- We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
- Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
- Comfortable workplace – class A offices or remote work
- Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
- PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
- Investment in your growth – meetups, webinars, training platform and technology blog – you choose
- Fantastic atmosphere created by all Sii Power People
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
Senior .NET Developer with AWS and React (f/m/x)
I apply to:
Sii Sp. z o.o.
Białystok, Centrum
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