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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on developing next-generation digital financial products spanning mobile apps, shared business logic, and backend services. Key technologies include Kotlin Multiplatform (KMP), Java, Spring Boot, and aspects of microservices and cloud. Responsibilities cover building and improving mobile features, backend development, working with CI/CD, and production support. The salary is 6500–7500 Euro net. Benefits include private medical care and sports activity subsidies.
from: 10 September 2026
to: 10 October 2026
salary not specifiedB2B contract (full-time)
Salary details
B2B: 6500 - 7500 Euro/month - netto
Offer parameters
level:senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
Kotlin
Java
Spring Boot
Kotlin Multiplatform
Android
Optional technologies
Kafka
AWS
CI/CD
Kubernetes
Docker
Our requirements
- Strong experience in mobile application development.
- Deep understanding of iOS&Android Architecture Components.
- Strong Kotlin skills and good understanding of modern mobile architecture.
- Experience building production-grade apps with good quality, performance and maintainability.
- Backend development experience with Java and Spring Boot.
- Understanding of APIs, microservices and event-driven systems.
- Experience with CI/CD, automated testing and production systems.
- Ability to take ownership of a feature from design to production.
- Good communication skills and ability to work with multiple teams.
- Cross-platform experience: Our strategic direction is Kotlin Multiplatform, because it lets us reuse business logic while still keeping native-quality mobile experiences.
Optional
- Experience with Kafka or other message broker / queue management tools.
- Strong communication and teamwork skills
- Ability to thrive in a fast-paced, dynamic environment
- Proactive, “Can-Do” attitude
- Strong problem-solving and system-thinking abilities
Your responsibilities
- Build and improve mobile features used by real customers.
- Develop shared business logic for mobile platforms, mainly using Kotlin Multiplatform (KMP)
- Build backend services and APIs using Java/Kotlin and Spring Boot.
- Work with cloud services, CI/CD pipelines, monitoring and production support.
- Improve performance, reliability, security and user experience.
- Use AI coding tools to help with development, testing, documentation and troubleshooting.
- Work closely with product, design, architecture, security and platform teams.
- Help define good engineering practices and mentor other developers.
About the project
You will join a team building next-generation digital financial products used by customers at scale. You will work across the mobile app, shared mobile logic, backend services and production systems.
We are moving towards a new development model: smaller teams with stronger ownership, more code reuse between platforms, and practical use of AI development tools. You do not need to know everything on day one, but you should be curious, hands-on and able to learn quickly.
We are looking for a strong engineer, not just a person who knows one framework. KMP experience is a strong advantage, but it is not the only path into this role.
This is how we organize our work
This is how we work
you have influence on the technological solutions appliedyou develop the code "from scratch"you focus on product developmentagile
Team members
backend developermobile developertechnical leaderarchitectproduct owner
This is how we work on a project
- code review
- Continuous Integration
- DevOps
- test automation
- unit tests
Benefits
- sharing the costs of sports activities
- private medical care
- integration events
- no dress code
- christmas gifts
- employee referral program
Recruitment stages
- 1.Rozmowa telefoniczna – wstępna rozmowa z Rekruterem
- 2.Weryfikacja u klienta – ocena dopasowania do wymagań biz.
- 3.Rozmowa kwalifikacyjna – spotkanie z przedstawicielem firmy
Integral Solutions
Integral Solutions, Informatica Platinum Partner Enterprise, od ponad 20 lat dostarcza nowoczesne rozwiązania IT dla biznesu, oferując usługi m.in. w zakresie integracji danych, Data Engineering (Big Data) oraz Data Governance. Specjalizując się w rekrutacji pracowników z branży IT, nie tylko w obszarze danych, pomaga Klientom powiększać zespoły projektowe o profesjonalistów IT.
Fullstack Mobile Developer (Kotlin) (m/k)
I apply to:
Integral Solutions
Warszawa, Masovian
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Wyrażam zgodę na przetwarzanie danych osobowych zawartych w CV oraz w powyższym formularzu dla potrzeb obecnego procesu rekrutacyjnego, prowadzonego przez Integral Solutions sp. z o.o. z siedzibą w Warszawie, ul. Księdza Skorupki 5, zgodnie z postanowieniami Rozporządzenia Parlamentu Europejskiego i Rady (UE) 2016/679 z dnia 27 kwietnia 2016 r. w sprawie ochrony osób fizycznych w związku z przetwarzaniem danych osobowych i w sprawie swobodnego przepływu takich danych oraz uchylenia dyrektywy 95/46/WE (‘Rozporządzenie 2016/679’).
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