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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on building advanced web applications using .NET and React. Core stack includes C# (.NET Framework, .NET Standard, .NET Core), React 18+, SQL Server/T-SQL and Visual Studio. Responsibilities cover development and maintenance of code, implementing frontend features in React, analyzing and refactoring legacy systems, designing scalable architecture, debugging and performance optimization, and applying DDD/CleanCode/SOLID within Scrum. Required minimums are 5 years in .NET, 3 years with React, and Polish plus English (B2). Benefits include e.g. private medical care, Multisport, Pluralsight and integration events.
from: 29 September 2026
to: 29 October 2026
18 900 - 24 150 złnet (+ VAT)/ mth.B2B contract (full-time)
Offer parameters
level:senior
working mode:hybrid
location:Gdańsk, Pomeranian
Gdańsk, Pomeranian
Requirements
Expected technologies
C#
.NET
Visual Studio
React.js
Optional technologies
Postman
Playwright
Our requirements
- Minimum 5 years of software development experience in .NET applications.
- At least 3 years working with React.
- Proficiency in Polish and a communicative level of English (min. B2).
- Well-developed analytical thinking abilities.
- Excellent organizational skills and attention to quality and deadlines.
- Secondary education, preferably higher education in computer science or related fields.
Optional
- Experience in creating views for mobile applications.
- Background developing solutions for the financial sector.
- Knowledge of test automation tools like Postman or PlayWright.
- Familiarity with WCAG standards.
Your responsibilities
- Develop high-quality software using C# (.Net Framework, .Net Standard, .Net Core) in accordance with technical documentation.
- Implement frontend features and interfaces with React (versions 18+).
- Analyze and enhance existing codebases, including legacy systems.
- Design and develop scalable architecture solutions.
- Collaborate closely with cross-functional teams—testers, analysts, and product owners—within agile (SCRUM) environments.
- Debug, profile, and optimize application performance.
- Apply best practices such as DDD, CleanCode, and SOLID principles.
- Work with SQL Server and TSQL using SQL Management Studio.
- Utilize Visual Studio for development processes.
About the project
Ignite innovation in software development - shape the future with cutting-edge .NET and React solutions!
As a Senior Fullstack Developer, you will be working for our client, a leading technology innovator. You’ll contribute to building sophisticated applications by leveraging your expertise in C# and React, helping to deliver impactful digital solutions. Join us and propel your career into new dimensions of success and innovation.
Warsaw or Gdańsk-based opportunity with hybrid work model (1day/ week in the office).
This is how we organize our work
This is how we work
at the client's site
Division of working time
- 70%backend
- 30%frontend
#GETREADY to meet with us!
ITDS Business Consultants is involved in many various, innovative and professional IT projects for international companies in the financial industry in Europe. We offer an environment for professional, ambitious, and driven people.
We would like to meet you. If you are interested please apply and attach your CV in English or Polish, including a statement that you agree to our processing and storing of your personal data.
ITDS’s Whistleblower Procedure
📌 You can report violations in accordance with ITDS’s Whistleblower Procedure available here: https://itds.pl/wp-content/uploads/2025/03/INFORMATION-ON-PROCEDURE-FOR-REPORTING-BREACHES-AND-PROTECTION-OF-WHISTLEBLOWERS-AT-ITDS-POLSKA.pdf
What we offer
- ITDS Clubs
- Access to medical insurance
- Access to Multisport
- Access to Pluralsight
- Integrational Events
- Ambassador Program
Benefits
- sharing the costs of sports activities
- private medical care
- flexible working time
- fruits
- integration events
- corporate gym
- saving & investment scheme
- no dress code
- coffee / tea
- drinks
- christmas gifts
- birthday celebration
- sharing the costs of a streaming platform subscription
- access to +100 projects
- access to Pluralsight
Recruitment stages
- 1.online interview
- 2.online interview
ITDS Polska Sp. z o.o.
ITDS supports financial service providers to take the next steps.
We identify what’s possible, every day. Opportunities in the areas of technology, organization, and digitization.
We see where banks, insurers, payment companies, or fintech can go and how they can get there.
That’s why we want to stimulate you to ramp up your ambition. Forget what you perceive as restraints and step towards the new reality.
ITDS in Poland - Pure player in new Technologies & Financial Industry
+300 IT implementation professionals
+20 clients in the Banking, Insurance, Payment & Fintech Industry
ITDS excels in digital strategy delivery and implementation of best-of-breed lending solutions. ITDS has delivered successful strategic projects throughout Europe since 1998. We combine the experience we’ve accumulated with in-depth knowledge of technologies, business processes, and EU legislation to unlock new business opportunities.
This is how we work
Senior Fullstack Developer (.NET & React)
18.9k–24.1k zł / mth. (B2B)
I apply to:
ITDS Polska Sp. z o.o.
Gdańsk, Pomeranian
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Informujemy, że administratorem danych jest ITDS z siedzibą w Warszawie, ul. Złota 59 (dalej jako "administrator"). Masz prawo do żądania dostępu do swoich danych osobowych, ich sprostowania, usunięcia lub ograniczenia przetwarzania, prawo do wniesienia sprzeciwu wobec przetwarzania, a także prawo do przenoszenia danych oraz wniesienia skargi do organu nadzorczego. Dane osobowe przetwarzane będą w celu realizacji procesu rekrutacji. Podanie danych w zakresie wynikającym z ustawy z dnia 26 czerwca 1974 r. Kodeks pracy jest obowiązkowe. W pozostałym zakresie podanie danych jest dobrowolne. Odmowa podania danych obowiązkowych może skutkować brakiem możliwości przeprowadzenia procesu rekrutacji. Administrator przetwarza dane obowiązkowe na podstawie ciążącego na nim obowiązku prawnego, zaś w zakresie danych dodatkowych podstawą przetwarzania jest zgoda. Dane osobowe będą przetwarzane do czasu zakończenia postępowania rekrutacyjnego i przez okres możliwości dochodzenia ewentualnych roszczeń, a w przypadku wyrażenia zgody na udział w przyszłych postępowaniach rekrutacyjnych - do czasu wycofania tej zgody. Zgoda na przetwarzanie danych osobowych może zostać wycofana w dowolnym momencie. Odbiorcą danych jest serwis Hello HR oraz inne podmioty, którym powierzyliśmy przetwarzanie danych w związku z rekrutacją.
Naruszenia można zgłaszać zgodnie z Procedurą zgłaszania nieprawidłowości ITDS dostępną tutaj:
https://itds.pl/wp-content/uploads/2025/03/INFORMATION-ON-PROCEDURE-FOR-REPORTING-BREACHES-AND-PROTECTION-OF-WHISTLEBLOWERS-AT-ITDS-POLSKA.pdf
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