Senior iOS Developer

Billennium; Polska; On-site; PLN 150,000 - 210,000; Full time

Benefits offered by this job

Udemy for Business

Private medical care

Multisport card

Language lessons

Shopping vouchers

Welcome pack

Job summary

Billennium is seeking a skilled mobile developer to join our team working on two healthcare-focused mobile applications. You will develop, maintain, and enhance apps across native iOS and Android and multi-technology stack including Ionic, Capacitor, and Angular, collaborating with QA and cross-functional teammates to deliver reliable releases.

You''ll participate in architecture decisions, optimize performance, and support knowledge transfer while thriving in an international, fast-paced

Qualifications

• Strong experience in native iOS development.
• Hands-on experience building, publishing, and maintaining iOS applications.
• Good knowledge of native Android development.
• Practical experience with Ionic framework.
• Good knowledge of Angular.
• Experience working with Capacitor.
• Proven experience maintaining, troubleshooting, and enhancing existing mobile applications.
• Strong technical independence in a multi-technology environment.

Responsibilities

• Develop, maintain, and enhance two existing mobile applications.
• Analyze current technical solutions and identify opportunities for improvement.
• Support the stabilization and further development of mobile applications.
• Collaborate with QA and cross-functional teammates to ensure high-quality deliverables.
• Participate in technical and architectural decision-making processes.
• Contribute to improving application quality, reliability, and maintainability.
• Support knowledge transfer activities and help build understanding of existing solutions.
• Work within a multi-technology mobile ecosystem including native and hybrid approaches.

Skills

iOS development

Android development

Ionic framework

Angular

Capacitor

Release management

Team collaboration

Education

Bachelor's degree in Computer Science

Tools

Xcode

Swift

Android Studio

Capacitor

Ionic

Job description

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

Our client is a global leader in the healthcare and life sciences sector, delivering innovative solutions in diagnostics, patient care, and digital health. The organization develops technologies that support the diagnosis, treatment, and long-term monitoring of patients across international markets.

What You Will Do

• Develop, maintain, and enhance two existing mobile applications used in a healthcare-focused environment.
• Analyze current technical solutions and identify opportunities for improvement.
• Support the stabilization and further development of mobile applications
• Collaborate closely with QA engineer and cross-functional team members to ensure high-quality deliverables.
• Participate in technical and architectural decision-making processes.
• Contribute to improving application quality, reliability, and maintainability.
• Support knowledge transfer activities and help build understanding of existing solutions.
• Work within a multi-technology mobile ecosystem involving native and hybrid development approaches.

Requirements

• Strong expertise in native iOS development.
• Hands‑on experience building, publishing, and maintaining iOS applications.
• Very good understanding of iOS architecture, release management processes, and the Apple ecosystem.
• Good knowledge of native Android development.
• Practical experience with Ionic framework.
• Good knowledge of Angular.
• Experience working with Capacitor.
• Proven experience maintaining, troubleshooting, and enhancing existing mobile applications.
• Strong technical independence and ability to work effectively in a multi‑technology environment.

Nice-to-have:

• Experience in technology migrations and application modernization initiatives.
• Previous experience in the healthcare industry.
• Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
• Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
• Global collaboration - work with a diverse, international team. Innovative environment - be part of a forward-thinking and growth-oriented workplace.
• Engaging community Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
• Team-building events including our company tradition (annual company event in Mazury).
• A pleasant surprise to start your journey with us in the form of a welcome pack.