Mid-Level .NET Developer (AI-Assisted) – Digital Banking Modernization
Offer summary

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

The project involves BPM platform modernization in the financial industry using .NET, C# and MS SQL. Responsibilities include rebuilding legacy .NET Framework applications to modern .NET architecture and developing automated tests. AI-powered tools like LLM Claude and Codex and Kubernetes are employed. Required skills include automated testing, Git, JIRA, TeamCity. The project follows an Agile methodology.

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Mid-Level .NET Developer (AI-Assisted) – Digital Banking Modernization

Company: ITDS Polska Sp. z o.o.

from: 24 July 2026
to: 23 August 2026
16 800 - 20 160net (+ VAT)/ mth.B2B contract (full-time)
13 000 - 14 000gross/ mth.contract of employment
Offer parameters
level:mid
working mode:hybrid
location:Łódź, Łódź
Łódź, Łódź

Requirements

Expected technologies

.NET
C#
Claude
Git
Jira

Optional technologies

Docker
Kubernetes

Our requirements

  • At least 3 years of experience in software development using C# and .NET
  • Experience with .NET Framework and modernizing legacy code
  • Practical experience working with LLM tools such as Claude and Codex
  • Strong experience with automated testing
  • Experience designing and implementing enterprise applications
  • Strong knowledge of MS SQL
  • Experience using Git, JIRA, and TeamCity
  • Ability to work independently while collaborating effectively within a team
  • English skills sufficient to write and understand technical documentation

Optional

  • Knowledge of Docker and Kubernetes

Your responsibilities

  • Develop and maintain backend services using .NET and C#
  • Rebuild legacy applications from .NET Framework to modern .NET architecture
  • Create and maintain automated tests
  • Collaborate with business stakeholders to analyze and refine requirements
  • Design scalable and maintainable software solutions
  • Integrate applications with databases and external services
  • Utilize LLM-based tools such as Claude and Codex to support software development activities
  • Participate in code reviews and ensure adherence to development standards
  • Deploy and support applications running in Kubernetes environments
  • Work closely with cross-functional teams in an Agile delivery model

About the project

Łódź-based opportunity with hybrid work model (2 days in the office/month).
As a .NET Developer you will be working for our client, a leading financial institution focused on delivering innovative digital banking solutions. You will join a strategic modernization initiative involving the redevelopment of a BPM platform. The project focuses on rebuilding legacy applications from .NET Framework to modern .NET technologies. You will collaborate closely with AI-powered development tools and help deliver scalable, secure, and maintainable solutions in a complex enterprise environment.

This is how we organize our work

This is how we work

at the client's siteagilescrum

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 (AI-Assisted) – Digital Banking Modernization
13k–14k zł / mth. (CoE), 16.8k–20.2k zł / mth. (B2B)
I apply to:
ITDS Polska Sp. z o.o.
Łódź, Łódź
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