Senior iOS Engineer - User Authentication

About Bolt

Bolt is shaping a future where cities are built for people, not cars. What started as an ambitious project of a 19-year-old in 2013 has grown into a global mobility platform used by more than 200 million customers and 4.5 million driver and courier partners across 50 countries.

From ride-hailing and food delivery to scooters, e-bikes, and car-sharing, Bolt helps people move through cities every day. Small, autonomous teams drive this work, combining the speed and ownership of a startup with the scale of a global technology company backed by more than €1bn in funding.

And we're just getting started.

Why join Bolt?

• Build the future of mobility and help transform how people live and move in cities.

• Tackle challenges at scale that span technology, operations, regulation, and growth.

• Take real ownership early. Small, lean teams mean your decisions matter from day one, and you'll learn fast alongside some of the best people in the industry.

• Join one of Europe's leading technology companies, backed by world-class investors including Sequoia.

About the role

As a Senior iOS Engineer, you will design, develop, and deploy mobile solutions that improve Bolt’s user authentication platform and make sign-in experiences seamless and secure for millions of customers. You’ll work primarily with Swift and iOS technologies, building and evolving authentication experiences and SDK integrations across Bolt apps.

You’ll collaborate closely with engineers, Product Managers, and other internal stakeholders to shape scalable mobile solutions that meet real user and business needs. Bolt engineers have a strong product mindset, so you’ll have the opportunity to drive impactful product initiatives from idea through to measurable results.

Main tasks and responsibilities

• Design, develop, A/B test, and deploy iOS solutions that improve Bolt’s user authentication flows.

• Build a deep understanding of our products, end users, and the business metrics they influence, contributing ideas and constructive feedback to the product roadmap.

• Collaborate with backend, mobile, and product teams to design reliable integrations between iOS applications, APIs, and authentication services.

• Lead features and initiatives from early discovery through to launch, ensuring they create a positive and validated impact for end users.

• Work closely with Product to break down scope and deliver meaningful improvements incrementally.

• Share your knowledge through code reviews, tech talks, and by promoting strong mobile engineering practices within and beyond the team.

About you

• You have experience building and maintaining high-quality iOS applications, with strong knowledge of Swift and modern iOS development practices. Experience with Kotlin Multiplatform (KMP) would be a plus.

• You thrive in environments with fast customer-feedback cycles and bring empathy for the end user to your technical decisions.

• You use data to guide decisions and are comfortable testing product hypotheses to understand their impact.

• You take ownership of initiatives from start to finish, including monitoring their success after release.

• You are experienced in designing maintainable mobile architectures and integrating applications with APIs and backend services.

• You have strong principles around writing clean, simple, secure, and maintainable code, along with a solid understanding of algorithms and data structures.

Why you’ll love it here

• Accelerate your professional growth with unique career opportunities.

• Enjoy a rewarding salary and stock options, knowing that as Bolt succeeds, so do you.

• Take care of your physical and mental health with our wellness perks.

• Celebrate 5 years at Bolt with a 1-month paid sabbatical to recharge.

• Connect with colleagues at annual company events and smaller team gatherings.

• Balance flexibility and in-person collaboration with our hybrid model, including at least 12 monthly in-office days.

Some perks may differ depending on your location and role.

At Bolt, using AI daily is a baseline expectation for everyone. If there’s a faster, smarter way to do your work, we expect you to find it. You’re still responsible for the output, so the standard stays high when using AI tools.

Experience is great, but what we really look for is drive, intelligence, and integrity. So even if you don’t tick every box, please consider applying!

Everyone is welcome

Bolt is an equal opportunity employer. We are committed to building a diverse and inclusive workplace where all qualified applicants are considered for employment without regard to race, colour, nationality, religion, gender or gender identity, sexual orientation, age, or disability.

We welcome applications from all backgrounds and are happy to make reasonable accommodations throughout our hiring process. If you require any adjustments, please let us know.