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Offer summary
(Summary generated by AI based on the full job description)
Project focuses on a cloud product for enterprise customers. Main stack comprises Kotlin, Java and related tools such as Kubernetes, Kafka, Cassandra. Responsibilities include developing and maintaining backend services, writing unit tests and participating in integration and performance testing, conducting code reviews and designing/supporting scalable APIs and distributed systems. Required minimum 4 years of backend experience, strong CS fundamentals, concurrency knowledge and Upper Intermediate English. Benefits include private medical care, training and language class subsidies, sports subsidies, life insurance, remote work and flexible hours.
Senior Software Developer with Kotlin
Company: DataArt Poland sp. z o.o.
from: 29 October 2026
to: 28 November 2026
20 000 - 24 500 złnet (+ VAT)/ mth.B2B contract (full-time)
15 000 - 20 000 złgross/ mth.contract of employment
Offer parameters
level:senior
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
Kotlin
Java
Kubernetes
Kafka
Cassandra
SQL
Optional technologies
AWS
Kubernetes
Vite
webpack
Operating system
Linux
Our requirements
- 4+ years of experience in backend development of commercial web applications using Java and or Kotlin
- Recent experience with Kotlin
- Strong understanding of core computer science concepts including data structures, algorithms, and complexity
- Experience designing and working with APIs
- Experience building or supporting distributed and scalable systems
- Hands on experience with Kubernetes, Kafka, Cassandra, or similar tools
- Good understanding of concurrency and multithreading in Java
- Upper Intermediate English or higher
- Ability to work independently in a distributed team
- Ability to communicate effectively in a multicultural environment
Optional
- Experience with performance optimization
- Experience contributing to technical design and specifications
Your responsibilities
- Develop and maintain backend services using Kotlin, Java, and related technologies
- Write clean, maintainable, and testable code
- Create unit tests and participate in integration testing when needed
- Participate in performance testing when needed
- Take part in code reviews
- Contribute to solving complex technical problems with attention to performance, security, and user experience
- Collaborate with cross functional teams to design, implement, and support product features
About the project
Cloud Product is a large scale cloud based product designed for enterprise customers.
You will work on backend capabilities and product improvements in close collaboration with cross functional stakeholders.
This is how we organize our work
This is how we work
you focus on a single project at a timeyou focus on product developmentagile
Team members
1-10 people:backend developerfrontend developerautomated test programmermanual testerproduct ownerproject managergraphic designerUX designer
This is how we work on a project
- code review
- integration tests
- performance tests
- unit tests
What we offer
- Work on backend capabilities and product improvements in close collaboration with cross functional stakeholders
- Work in a cross functional product team that includes product managers, designers, developers, QA engineers, and other stakeholders
- Work in a distributed and multicultural environment
Development opportunities we offer
- substantive support from technological leaders
- technical knowledge exchange within the company
- time for development of your ideas
Benefits
- sharing the costs of sports activities
- private medical care
- sharing the costs of foreign language classes
- sharing the costs of professional training & courses
- life insurance
- remote work opportunities
- flexible working time
- corporate products and services at discounted prices
- integration events
- employee referral program
- extra leave
DataArt Poland sp. z o.o.
The client is a SaaS company that provides project and portfolio management solutions, primarily for teams using Atlassian tools like Jira.
Its platform helps organizations plan, track, and optimize work through capabilities such as time tracking, resource management, roadmapping, and strategic portfolio planning.
Trusted by tens of thousands of companies globally, the client focuses on improving team productivity, alignment, and delivery performance through integrated, data-driven workflows.
Senior Software Developer with Kotlin
15k–20k zł / mth. (CoE), 20k–24.5k zł / mth. (B2B)
I apply to:
DataArt Poland sp. z o.o.
Warszawa, Masovian
Need more information?
- Make sure the body of the offer doesn’t already include what you’re looking for.
- Ask a question if you need more information you’re interested in.
- We’ll forward your question to the employer and aim to provide a response within 3 business days.