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Offer summary
(Summary generated by AI based on the full job description)
The project involves developing a modern, complex software platform. Core stack includes Kotlin, Java, microservices, Kubernetes, AWS and Apache Kafka. Responsibilities cover designing and building scalable backends, integrating with external systems, monitoring performance, participating in code reviews and supporting CI/CD and code quality improvements.
from: 30 October 2026
to: 29 November 2026
salary not specifiedB2B contract (full-time)
salary not specifiedcontract of employment
Offer parameters
level:senior
working mode:hybrid • full office
Poznań, Wilda
Requirements
Expected technologies
Kotlin
AWS
Apache Kafka
Kubernetes
Microservices
Optional technologies
React.js
TypeScript
Our requirements
- At least 3 years of professional experience in software development, particularly with Java and Kotlin
- Solid experience in designing and developing microservice-based applications
- Hands-on knowledge of Kubernetes and containerized application environments
- Practical experience working with AWS and Apache Kafka
- Good understanding of application performance, scalability, and reliability principles
- Ability to collaborate effectively with developers and other cross-functional team members
- Advanced English skills
Optional
- Experience with React.js and TypeScript
Your responsibilities
- Designing, developing, and enhancing scalable backend services using Kotlin
- Working closely with product, engineering, and other teams to deliver effective technical solutions
- Monitoring application performance and identifying opportunities to improve scalability, stability, and efficiency
- Contributing to code reviews and technical discussions to maintain high development standards
- Supporting continuous improvements in development practices and overall code quality
- Sharing technical knowledge and supporting other team members in their professional growth
About the project
We are looking for an experienced Senior Kotlin Developer to join a team working on a modern and complex software platform. You will focus on developing scalable backend solutions and microservices, implementing new functionalities, and integrating the platform with external systems. You will also have the opportunity to contribute to technical decisions and improve the performance, reliability, and overall quality of the solution.
What we offer
- Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
- Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
- We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
- Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
- Comfortable workplace – class A offices or remote work
- Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
- PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
- Investment in your growth – meetups, webinars, training platform and technology blog – you choose
- Fantastic atmosphere created by all Sii Power People
Recruitment stages
- 1.Send your CV
- 2.Talk to us about your expectations
- 3.Learn more about our projects and choose the best
- 4.Start your adventure with Sii!
Sii Sp. z o.o.
Sii is the leading technology consulting, digital transformation, engineering, and business services vendor in Poland. We already employ more than 7 300 professionals and implement projects in a variety of industries for clients from many countries around the world. The Great Place to Work title, won 10 times in a row, proves that at Sii, we create a friendly work environment.
Sii ensures that all employment-related decisions are made solely on the basis of qualifications and competencies. We are committed to equal treatment of all individuals, regardless of any protected characteristics, and promoting a diverse and inclusive work environment.
This is how we work
Senior Kotlin Developer (f/m/x)
I apply to:
Sii Sp. z o.o.
Poznań, Wilda
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