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Senior Backend Developer – Java/.NET Cloud-Native Solutions
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Offer summary

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

The project focuses on building a portal for the financial sector with emphasis on high-performance backend services. Key technologies are Java or .NET with preference for Spring Boot / .NET Core, and container orchestration: Docker, Kubernetes, OpenShift. Responsibilities include developing and maintaining services and REST APIs, designing data models and integrating with relational or NoSQL databases, deploying and optimizing containerized applications, applying CI/CD and testing practices, and participating in on-call production support.

you can start ASAP

Senior Backend Developer – Java/.NET Cloud-Native Solutions

Company: ITDS Polska Sp. z o.o.

from: 2 October 2026
to: 1 November 2026
21 000 - 23 730 złnet (+ VAT)/ mth.B2B contract (full-time)
Offer parameters
level:senior
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

Java
.NET
Spring Boot
Docker
Kubernetes
OpenShift
SQL

Optional technologies

Kafka

Our requirements

  • 5+ years of experience in backend software development with strong expertise in Java or .NET (Spring Boot / .NET Core preferred).
  • Proven experience building and consuming REST APIs.
  • Hands-on experience with container technologies and orchestration tools—Docker, Kubernetes, or OpenShift.
  • Working knowledge of relational databases, data modeling, and query optimization.
  • Familiarity with CI/CD pipelines and automated testing practices.

Optional

  • Experience with messaging or event-driven architectures using Kafka, MQ, etc.
  • Domain experience in financial services, fund administration, or transfer agency.
  • Exposure to cloud-native development practices.

Your responsibilities

  • Develop and maintain backend services and RESTful APIs using Java or .NET to ensure reliable portal functionality.
  • Design data models and integrate with relational or NoSQL databases to support portal features.
  • Collaborate closely with front-end teams to define API contracts and ensure smooth integration.
  • Build, deploy, and optimize containerized applications within Docker/Kubernetes/OpenShift environments.
  • Implement secure coding practices, conduct unit/integration testing, and integrate with CI/CD pipelines.
  • Troubleshoot and resolve production issues, participating in on-call and support rotations.
  • Contribute to Agile ceremonies, sprint planning, and technical design discussions to foster continuous improvement.
  • Optimize system performance, scalability, and reliability to meet evolving user needs.

About the project

As a Senior Backend Developer, you will be working for our client, a leading technology-driven organization dedicated to delivering cutting-edge portal solutions. Join a team focused on designing and maintaining high-performance backend services that empower seamless user interactions and drive digital transformation in the financial sector. This is your chance to accelerate your career while shaping innovative solutions on a global scale.
Empower scalable innovation — build robust, cloud-native backend solutions that transform user experiences!
Warsaw-based opportunity with hybrid work model.

This is how we organize our work

This is how we work

in houseyou focus on product developmentagilescrum

Team members

backend developerfrontend developertechnical leaderdevOps

This is how we work on a project

  • code review
  • Continuous Deployment
  • Continuous Integration
  • DevOps
  • documentation
  • integration tests
  • test automation
  • unit tests

#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
Language required for the role:
Fluent English.
Eligibility for the role:
Only candidates with an existing legal right to work in the European Union will be considered.
#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data
Company

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.

working for our client, a leading technology-driven organization dedicated to delivering cutting-edge portal solutions.
team focused on designing and maintaining high-performance backend services that empower seamless user interactions and drive digital transformation in the financial sector.

This is how we work

Senior Backend Developer – Java/.NET Cloud-Native Solutions
21k–23.7k zł / mth. (B2B)
I apply to:
ITDS Polska Sp. z o.o.
Warszawa, Masovian
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