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Offer summary
(Summary generated by AI based on the full job description)
The project involves maintenance and incremental development of native mobile apps for iOS (Swift, UIKit) and Android (Kotlin, Jetpack Compose) along with a Spring Boot backend. Responsibilities include app maintenance, feature enhancements, managing releases on App Store and Google Play, production support, and incident analysis. Required knowledge covers mobile security and CI/CD pipelines. Benefits include Medicover healthcare and sports cost sharing, with 50% remote work.
Senior Mobile Full Stack Developer (iOS, Android, Spring Boot) - 0,5 FTE
Company: SQUARE ONE RESOURCES sp. z o.o.
from: 6 August 2026
to: 5 September 2026
130 - 150 złnet (+ VAT)/ hr.B2B contract (additional / temporary, part time)
Offer parameters
level:mid • senior
working mode:remote
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
Swift
UIKit
Kotlin
Jetpack Compose
Spring Boot
PostgreSQL
Spring Security
iOS
Android
Java 17
Optional technologies
AWS
Our requirements
- 3+ years of commercial iOS development using Swift and UIKit.
- 3+ years of commercial Android development using Kotlin and Jetpack Compose.
- Experience managing mobile application releases end-to-end.
- Experience working with existing Spring Boot applications.
- Knowledge of mobile security concepts and secure authentication.
- Experience building or maintaining CI/CD pipelines.
- Experience working in production support environments.
Optional
- Working knowledge of AWS services such as EC2, RDS, S3, CloudWatch, WAF.
Your responsibilities
- Maintain and enhance native mobile applications for iOS and Android.
- Investigate, troubleshoot, and resolve production issues.
- Implement minor feature enhancements and improvements.
- Ensure compatibility with new mobile operating system releases.
- Manage App Store and Google Play release processes.
- Support and maintain the Spring Boot backend.
- Participate in incident analysis, root cause investigations, and resolution activities.
- Collaborate with cross-functional engineering and delivery teams in an Enhance & Operate model.
About the project
Developer will be responsible for the maintenance and incremental development of a production mobile solution consisting of native iOS and Android applications, as well as Spring Boot backend services and mobile application release management.
Project details:
- Start: ASAP
- Workload: 50% FTE
- Equipment: provided by the client
- Working hours: business hours only (08:00–18:00 GMT/BST)
- On-call: no out-of-hours support required
- Recruitment process: 2 technical interviews
This is how we organize our work
This is how we work
at the client's site
This is how we work on a project
- Continuous Deployment
- Continuous Integration
What we offer
- Medicover
- Medicover Sport
- 100% remote
- Workload: 50% FTE
- Equipment: provided by the client
- Start ASAP
Benefits
- sharing the costs of sports activities
- private medical care
Recruitment stages
- 1.Initial recruiter screening
- 2.First interview
- 3.Second technical interview with the client
SQUARE ONE RESOURCES sp. z o.o.
At Square One Poland we link IT experts with the business. With over 25 years of experience, we specialize in recruitment processes on a global scale. Despite years of experience, we still have a startup DNA and this is our advantage. Our offices are located in London and Warsaw, however, we can reach clients from all over the world, from start-ups to big worldwide corporations.
This is how we work
Senior Mobile Full Stack Developer (iOS, Android, Spring Boot) - 0,5 FTE
130–150 zł / hr. (B2B)
I apply to:
SQUARE ONE RESOURCES 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.