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Senior .NET Developer – Banking and Financial Solutions
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Offer summary

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

The project focuses on innovative online banking solutions emphasizing security and scalability. Technologies include .NET 8, PostgreSQL, MS SQL, Docker, Kubernetes. Responsibilities involve designing and developing new features, optimizing data access, maintaining containerized applications, and implementing secure payment solutions. Work takes place in an Agile environment with a focus on code quality and team mentoring.

you can start ASAP

Senior .NET Developer – Banking and Financial Solutions

Company: ITDS Polska Sp. z o.o.

from: 26 August 2026
to: 25 September 2026
16 800 - 23 100 złnet (+ VAT)/ mth.B2B contract (full-time)
14 500 - 16 500 złgross/ mth.contract of employment
Offer parameters
level:senior
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

.NET
.NET Core
PostgreSQL
Microsoft SQL Server
Docker
Kubernetes

Optional technologies

Elixir
Sorbnet

Our requirements

  • At least 5 years of experience in developing complex IT systems.
  • Strong hands-on expertise with .NET framework and .NET Core.
  • Solid knowledge of PostgreSQL and MS SQL databases.
  • Passion for software architecture, design patterns, and architectural principles.
  • Experience with Docker and Kubernetes containerization.
  • Practical understanding of Agile software development methodologies.
  • Excellent communication skills and ability to collaborate in distributed teams.
  • Ability to work independently, manage your time effectively, and prioritize tasks.
  • Experience in developing new features while maintaining existing systems.
  • A genuine passion for continuous learning and professional growth.

Optional

  • Knowledge of banking domain, especially payments and transactions (e.g., Elixir, Sorbnet).

Your responsibilities

  • Design and develop new features in .NET 8 to enhance banking services.
  • Implement and optimize SQL-based data access for robust data management.
  • Build and maintain containerized applications using Docker and Kubernetes.
  • Collaborate with distributed teams in an Agile environment to ensure seamless project delivery.
  • Participate in developing secure payment solutions to safeguard financial transactions.
  • Share knowledge and mentor less experienced team members to foster continuous growth.
  • Ensure code quality through rigorous reviews and testing.
  • Maintain existing functionalities and troubleshoot production issues effectively.

About the project

As a Senior .NET Developer, you will be working for our client, a leading innovator in online banking, supporting the development and maintenance of cutting-edge financial solutions. You’ll contribute to building reliable, scalable banking functionalities in a dynamic, Agile environment, helping shape the future of digital finance and delivering impactful solutions for users worldwide.
Ignite innovation in online banking — craft secure, high-performance financial solutions that redefine digital finance!
Warsaw-based opportunity with hybrid work model.
Only candidates with an existing legal right to work in the European Union will be considered.

This is how we organize our work

This is how we work

at the client's site

#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
  • remote work opportunities
  • 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 .NET Developer – Banking and Financial Solutions
14.5k–16.5k zł / mth. (CoE), 16.8k–23.1k zł / mth. (B2B)
I apply to:
ITDS Polska Sp. z o.o.
Warszawa, Masovian
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