Senior Native Mobile Developer

About the role

Reaktor is seeking an experienced Senior Native Mobile Developer to join its Gaming & Entertainment Business Unit in Helsinki. You will work on both iOS and Android native applications, collaborating with multidisciplinary teams and clients.

Key responsibilities

• Develop native mobile applications for iOS (Swift/Objective‑C) and Android (Kotlin/Java).
• Build polished UI experiences with high‑performance animations.
• Implement mobile SDKs, analytics, ads and attribution frameworks as required by client projects.
• Collaborate with clients and stakeholders to clarify requirements and drive initiatives.
• Contribute to architectural decisions and long‑term technical direction.
• Own testing, debugging, monitoring, troubleshooting and production quality.
• Occasionally support backend, API or cloud infrastructure work when beneficial.

Required profile

• Strong experience in native iOS development using Swift and/or Objective‑C.
• Strong experience in native Android development using Kotlin and/or Java.
• Testing ownership mindset and experience with production app monitoring.
• Ability to engage with multiple stakeholders and solve ambiguous problems.
• Fluent verbal and written English.

Required skills

• Swift, Objective‑C, Kotlin, Java
• SwiftUI, Jetpack Compose
• Reactive programming
• Flutter
• C++
• Backend APIs, databases, cloud infrastructure

What we offer

• Flexible approach to technologies and methodologies.
• Supportive community and experienced team.
• Work‑life balance initiatives (e.g., car share, sick‑child care, private event spaces).
• Internal training, community events and academy‑style studies.
• 300+ hobby clubs and inclusive DEI culture.