iOS Mobile Developer — Secure MFA & Passkeys

Rublon Access Gateway; Kraków; On-site; PLN 120,000 - 180,000; Full time

Job description

Join Rublon to work with a team of cybersecurity enthusiasts who are building the future of enterprise user authentication. Rublon MFA is a multi-factor authentication platform used by hundreds of customers across the globe to protect employee logins to networks, servers and applications.

We are looking for a long-term employee who will support us in the following area:

Development of Rublon Authenticator Mobile App

Rublon Authenticator is a mobile application that enables users to perform multi-factor authentication when accessing accounts protected by Rublon MFA, such as local Windows Logon or remote access via RDP and VPN. You will help us improve the app’s capabilities, including introducing passwordless authentication using Passkeys, while ensuring top-level security and usability for enterprise users.

How You’ll Work

• Self development: access to online training courses, sponsored certifications
• Benefits for employees: access to private medical care and MultiSport card

What You’ll Do

As an iOS Mobile Developer on the Rublon team you will:

• Design and develop new features for the Rublon Authenticator iOS app
• Implement secure authentication workflows, including Passkey-based passwordless login
• Improve app robustness, performance, and user experience
• Ensure the highest standards of secure mobile development practices
• Collaborate closely with a senior mobile developer and the broader engineering team
• Conduct and participate in code reviews
• Integrate mobile security best practices into the product development lifecycle
• Help test and validate compatibility across multiple iOS versions and devices

Skills You Have

• At least 3 years of commercial experience in developing iOS mobile apps
• Knowledge about building secure mobile apps
• Familiarity with TOTP authenticator apps
• Ability to come up with creative concepts using modern technologies together in unexpected ways
• Interest in information security and secure software design

Nice To Haves

• Knowledge about FIDO2/Passkey authentication
• Experience in Android development (Java, Kotlin)
• Understanding of core Identity & Access Management (IAM) concepts
• Knowledge of Active Directory and Entra ID
• Experience with CI/CD environments
• Ability to design user interfaces with great UX
• Formal education and advanced degree in Information Security, Cybersecurity, Computer Science or similar and/or commensurate demonstrated work experience in the same

Why Apply

• You want to work on a mobile app that plays a critical role in enterprise multi-factor authentication
• You enjoy developing secure, modern mobile applications that integrate with enterprise environments
• You thrive in a team that values creativity, quality, and secure coding practices
• You are eager to grow professionally in cybersecurity and mobile software development

Steps After You Apply

• You’ll be invited to an online meeting with our recruiter
• Afterwards, we’ll ask you to do a small assignment, which will then be discussed with one of our technical leads
• If everything goes well, we will make you an offer and invite you to a final interview