Mobile Developers (Junior/Mid/Senior/Lead), Total & FSSDK

For over 35 years, F-Secure has led the cybersecurity industry with our 200+ service provider partners. As the home of scam protection, we're reimagining how we protect people from modern threats through cutting-edge scam detection and solutions that are setting the industry standard. We bring together the sharpest minds of cyber security with a shared purpose: to protect people from modern threats. Here, you’ll have a real impact, making every digital moment more secure for everyone. You’ll thrive and grow in our Fellowship culture, where we dream big, trust, and challenge each other to deliver results and move with speed. You’ll be welcomed into a diverse, global team with an informal and collaborative culture where your voice truly matters.

Join us in securing the digital world together – where your work will make a lasting impact.

We're looking for Mobile Developers at junior, senior & lead levels to join our product teams in Helsinki. Whether you specialize in Android, iOS, or have experience across both platforms, we want to hear from you. Our mobile applications protect millions of users worldwide from scams, malware, and digital threats – and we're looking for developers who want to make that impact even greater.

You'll have the opportunity to join either our FSSDK team, which builds and maintains security SDKs used by major global partners, or our TOTAL team, developing our flagship consumer security product that includes endpoint protection, VPN, scam protection, and identity theft solutions.

This role is based in Helsinki, Finland, and we work in a hybrid setting with flexibility to work from home while coming together for collaboration at our modern HQ.

We're Looking For

Android Developers at various levels – from a Team Lead who can guide technical direction and mentor others, to mid/senior developers ready to tackle complex challenges, to trainees eager to grow their skills in a supportive environment.

iOS Developers ranging from senior specialists who can drive architectural decisions to junior-level developers contributing to feature development. We're also interested in developers with solid iOS backgrounds who are curious about expanding into macOS development.

Key responsibilities in this role:

• Building and enhancing mobile security applications that protect tens of millions of users across 50+ countries
• Based on your interests and skills, you will be either developing our headless SDKs that integrate seamlessly with partner applications; or building consumer apps where thoughtful design meets security
• Implementing features around threat detection, safe browsing, VPN functionality, and identity protection
• Collaborating with security researchers, designers, and product managers to bring ideas from concept to delivery
• Contributing to code quality through design reviews, code reviews, and testing practices

What are we looking for?

• Experience in mobile development with Jetpack Compose with Kotlin/Java for Android or SwiftUI with Swift/Objective-C for iOS/Mac
• Understanding of mobile architecture patterns and design principles
• Passion for writing clean, maintainable, and testable code
• Curiosity about cybersecurity and protecting users from digital threats
• Full professional proficiency in English for collaboration in our international environment

You'll stand out if you have:

• Experience building security-focused applications or SDKs
• Passion for building scalable, responsive and modular world-grade consumer UX
• Background in networking, VPN technologies, or mobile security
• Experience with modern CI/CD and build systems
• Experience with cross-platform UX technologies is a bonus
• Experience shipping products with high cadence while maintaining quality
• Track record of mentoring others (for senior/lead positions)

• Our Hiring Process

Our hiring process typically consists of three rounds: an introduction interview, a technical team interview, and a final interview. We aim to move quickly and keep you informed throughout.

What you will get from us?

• Welcome to the good side – the home of scam protection! Work with industry-leading experts defining the future of cybersecurity and scam protection
• Be an AI pioneer, not a follower. Access industry-leading tools like Claude and Claude Code, with full support to integrate AI into your daily work while others are still figuring out policies. We're not asking "if" but "how" AI transf