Senior Android Developer

Job Description

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.

 
Are you a curious and skilled Android developer who enjoys building clean, reliable, and meaningful mobile experiences? We're looking for a Senior Android Developer to join our FSSDK team — the team that builds and maintains the security SDKs behind leading cybersecurity apps used by major global partners. These SDKs power key features that protect millions of users from scams, malware, and other digital threats.

You'll be joining the team at an interesting architectural moment: we're mid-way through a full SDK modularization effort, moving from a legacy monolith toward a clean, bounded module structure. At the same time, the team owns and actively develops a broad range of security and privacy features — Safe WiFi, Identity Monitoring, Antivirus, and Secure DNS among them — so there's no shortage of depth to explore across both architecture and product domains.

This role goes beyond writing Android code. You'll actively collaborate with iOS, backend, quality, and product teams, participate in architectural reviews, and help align SDK development across platforms and partners. Communication and cross-team guidance are as essential here as technical skills.

We work in a hybrid model based in our newly opened Helsinki HQ — designed for modern collaboration and teamworking, complete with a rooftop sauna and a fully equipped gym.

Our estimated salary range for this role is €5,500 to €6,500 per month, based on your experience and skills.

Key responsibilities:

• Design, develop, and maintain native Android components of the FSSDK using Kotlin and Java, contributing to architectural decisions that simplify legacy flows toward a cleaner, more sustainable SDK structure
• Collaborate daily with iOS and backend developers to ensure technical consistency and integration quality across platforms, taking an active role in code reviews, cross-team discussions, and architectural evaluations
• Champion best practices across teams — providing guidance, feedback, and mentoring that influences work beyond your own squad
• Write unit and integration tests to support high-quality continuous delivery, and investigate and fix bugs across a wide range of device types and partner implementations
• Support the team in maintaining service-level excellence for Tier 1 partners, sharing learnings on Android development, quality, and architectural approaches
• Optionally contribute to iOS development depending on your curiosity and growth goals

What are we looking for?

• Strong experience in native Android development using Kotlin and Java, with a solid understanding of design patterns and modern Android architectures
• Hands-on experience with unit testing and continuous integration, and a passion for writing clean, testable, and maintainable code
• Ability to influence, review, and guide work across team boundaries — strong communication skills and a natural inclination to mentor and collaborate
• Experience working in agile development teams and a global environment
• Full professional proficiency in English

You get bonus points for:

• Experience with cloud environments (AWS, Azure), Python, or mobile SDK development
• Interest in growing into a team leadership role

Our hiring process:

Our hiring process will consist of three interview rounds: introduction interview, team interview, and final interview. Our aim is to move quickly through the steps and inform each candidate in a timely manner whether they will proceed in the process.

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 transforms our work, positioning you at the forefront of the industry.
• Flexible work that works for you: hybrid and remote options with team-agreed ways of working.
• Inclusive environment with flat, approachable leadership in our diverse global community. Thrive in our Fellowship culture where we empower, trust, challenge, and support each other in doing our best work.
• Comprehensive global benefits including Employee Share Savings Plan (ESSP), Fellow Member of the Board opportunities, and Annual Protect & Educate paid volunteer day.
• Wellbeing support through personal coaching services and one hour per week for personal recharging.
• Continuous growth via F-Secure Academy, Leadership programs, AI training, mentoring, and dedicated Learning Week.

A security vetting will possibly be conducted for the selected candidate in accordance to our employment process.