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Senior Backend - Fullstack Developer
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Offer summary

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

The project targets Customer Data Management and involves designing and operating a platform tracking customer-vehicle relationships across the lifecycle. Core stack: Java, Spring, Kotlin, Apache Kafka, AWS with optional JavaScript, Angular. Responsibilities include developing scalable backend services, building APIs and CRM integrations, working extensively with Apache Kafka for event-driven communication, designing distributed solutions, deploying on AWS, applying IaC, monitoring, troubleshooting and production support in a you build it, you run it model. Required experience: Java/Kotlin, Spring, Kafka, system architecture and AWS; fluent English.

you can start ASAP

Senior Backend - Fullstack Developer

Company: WINGED IT SP Z O O

from: 22 September 2026
to: 22 October 2026
160 - 180 złnet (+ VAT)/ hr.B2B contract (full-time)
Salary details
basic salary
Offer parameters
level:senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

Java
Kotlin
Spring Framework
Kafka
AWS

Optional technologies

JavaScript
Angular
Salesforce

Our requirements

  • Several years of professional software development experience with Java and/or Kotlin.
  • Strong hands-on experience with Spring.
  • Strong practical experience with Apache Kafka in production environments.
  • Experience designing and implementing APIs and system integrations.
  • Solid experience with software architecture and system design.
  • Good understanding of event-driven architectures, asynchronous communication and distributed systems.
  • Practical experience with AWS and cloud-native application development.
  • Knowledge of cloud engineering best practices, including Infrastructure as Code and cloud security.
  • Strong DevOps mindset and experience taking responsibility for applications after deployment.
  • Experience working with CI/CD, monitoring, troubleshooting and production environments.
  • Strong ownership mentality and a hands-on approach to software engineering.
  • Very good English communication skills, as you will work in an international environment.

Optional

  • Experience with JavaScript and Angular.
  • Experience integrating with Salesforce APIs.

Your responsibilities

  • Design, develop and maintain scalable backend services using Java and/or Kotlin with Spring.
  • Build and maintain APIs and integrations between customer-facing applications, CRM platforms and other enterprise systems.
  • Work extensively with Apache Kafka to support event-driven communication and real-time data exchange.
  • Design and develop solutions based on distributed and event-driven architectures.
  • Contribute to software architecture, system design and technical decision-making.
  • Develop and operate cloud-native solutions running on AWS.
  • Apply cloud engineering best practices, including Infrastructure as Code, cloud security, automation and observability.
  • Take end-to-end ownership of developed services, including deployment, monitoring, troubleshooting and production support.
  • Work according to a DevOps-oriented “you build it, you run it” approach.
  • Collaborate closely with developers, architects, product teams and other technical stakeholders in an international environment.
  • Ensure solutions are scalable, maintainable, secure and reliable throughout their lifecycle.

About the project

We are looking for a Senior Backend / Fullstack Developer to join an international product team working within the Customer Data Management domain.
The team is responsible for designing, developing and operating scalable services that represent the relationship between customers and vehicles throughout the entire lifecycle. The platform integrates with multiple enterprise systems, including customer-facing applications, CRM platforms and other internal services.
A key element of the ecosystem is Apache Kafka, which is used as the central event-streaming platform to exchange large volumes of data in real time between different systems and applications. Therefore, strong hands-on experience with Kafka is essential for this role.
This is a hands-on engineering position combining backend development, cloud technologies, system integration and architecture. We are looking for someone who is comfortable taking end-to-end ownership of solutions in line with the “you build it, you run it” approach.
Employer: Leading Global Consulting Company
Location: Remotely from Poland with occasional business trips to Germany
Technology stack: Java, Spring, Kotlin, Apache Kafka, AWS, JavaScript, Angular

This is how we organize our work

This is how we work

agilescrum

This is how we work on a project

  • Continuous Deployment
  • Continuous Integration
Company

What we offer

  • Opportunity to work on a large-scale international technology project.
  • Fully remote cooperation.
  • Occasional business trips to Germany, typically once every few months.
  • Work with modern cloud, event-streaming and distributed system technologies.
  • Direct involvement in architecture and technical decision-making.
  • High level of ownership and responsibility for developed solutions.
  • Cooperation with experienced engineering and product teams in an international environment.
  • Long-term project perspective and opportunities for professional development.

Recruitment stages

  • 1.
    online interview
  • 2.
    online interview

WINGED IT SP Z O O

Winged IT is a Polish Tech Recruitment, Outstaffing, and Consulting Company with over 100 clients from 4 continents.
We deliver Tech Talents from Central and Eastern Europe, ready to work remotely from Poland or relocate to other countries.
We effectively support international companies in establishing their remote (in-house or oustaffed) engineering teams in Poland – to learn why to choose Poland, please visit our dedicated website https://doITinPoland.com/.

This is how we work

Senior Backend - Fullstack Developer
160–180 zł / hr. (B2B)
I apply to:
WINGED IT SP Z O O
Warszawa, Masovian
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