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Mid-Level .NET Developer – Financial Technology Sector
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Offer summary

(Summary generated by AI based on the full job description)

The project focuses on developing online banking systems within the financial sector. Technologies used include C#, .NET, .NET Core, MS SQL, PostgreSQL, Docker, Kubernetes. Key responsibilities involve implementing new features, supporting the core banking system, developing automated tests, and collaborating with analysts and business users. Maintaining system stability and performance as well as participating in testing and technical documentation are also required. Benefits include private medical care and access to Pluralsight.

you can start ASAP

Mid-Level .NET Developer – Financial Technology Sector

Company: ITDS Polska Sp. z o.o.

from: 27 May 2026
to: 26 June 2026
14 700 - 20 160 złnet (+ VAT)/ mth.B2B contract (full-time)
13 000 - 14 500 złgross/ mth.contract of employment
Salary details
basic salary
Offer parameters
level:mid
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

C#
.NET
.NET Core
Microsoft SQL Server
PostgreSQL
Docker
Kubernetes

Operating system

Windows

Our requirements

  • At least 3 years of experience in software development, preferably within the financial technology sector.
  • Good knowledge of C#, .NET, .NET Core.
  • Experience with MS SQL and PostgreSQL.
  • Understanding of object-oriented programming principles and design patterns.
  • Hands-on experience with Docker and Kubernetes.
  • Knowledge of automated testing techniques.
  • Ability to work effectively in a team environment.
  • Strong communication skills and attention to detail.
  • Good organizational skills and the ability to quickly learn new technologies.
  • Proficiency in working with technical documentation in English.
  • Familiarity with software development best practices (e.g., SOLID).

Optional

  • Knowledge of Agile methodologies.

Your responsibilities

  • Implement new functionalities and system improvements in applications developed in the .NET environment.
  • Participate in development work within projects related to the core banking system.
  • Develop and maintain automated tests to ensure high-quality solutions.
  • Collaborate with analysts and business users to support requirements analysis and clarification.
  • Participate in internal software testing and verification processes.
  • Create and update technical and functional documentation for developed solutions.
  • Support the development team in maintaining system stability and performance.

About the project

As a Mid-Level .NET Developer, you will be working for our client, a leading player in the online banking sector dedicated to developing and maintaining large-scale financial systems that support daily digital banking operations. Join a forward-thinking team building solutions that shape the future of financial services, offering exciting opportunities for growth and innovation.
Ignite the future of digital banking — develop innovative solutions that transform financial services!
Warszawa-based opportunity with hybrid work model (2 days in the office / 4 days remote per week).
Only candidates with an existing legal right to work in the European Union will be considered for this role.

This is how we organize our work

This is how we work

at the client's siteagilescrum

#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
Company

What we offer

  • Stable and long-term cooperation with very good conditions
  • Enhance your skills and develop your expertise in the financial industry
  • Work on the most strategic projects available in the market
  • Define your career roadmap and develop yourself in the best and fastest possible way by delivering strategic projects for different clients of ITDS over several years
  • Participate in Social Events, training, and work in an international environment
  • Access to attractive Medical Package
  • Access to Multisport Program
  • Access to Pluralsight
  • Flexible hours

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

Mid-Level .NET Developer – Financial Technology Sector
13k–14.5k zł / mth. (CoE), 14.7k–20.2k zł / mth. (B2B)
I apply to:
ITDS Polska Sp. z o.o.
Warszawa, Masovian
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