iOS Engineer
Confirmed on the employer's own hiring board on Oct 14, 2026. First seen by Alion on Oct 14, 2026.
About us
At Trainline, our purpose is to empower greener travel choices, connecting people and places. Trainline enables millions of travellers to find and book the best value tickets across carriers, fares, and journey options through our highly rated mobile app, website, and B2B partner channels.
Great journeys start with Trainline
We’re Europe’s leading independent rail platform, helping millions of travellers find and book the best-value rail and coach journeys across our app, website and partner channels.
Our job is to make the green travel choice the best choice. By building a better train travel experience, we help more people choose rail - creating a positive impact for customers, our business and the planet.
We’re a team of more than 1,000 Trainliners from over 50 nationalities, working across London, Paris, Barcelona, Milan, Edinburgh and Madrid. Now is a brilliant time to join us and help shape the future of travel.
Introducing the Trainline Mobile Team
Our Mobile Engineers build the travel companion in your pocket, the Trainline app. From the smart, seamless booking experience to the buy-flow that gets millions of people on their way, the team shapes how customers plan and take their journeys every day.
You'll be joining the Trainline Media, focused on building new experiences and unlocking revenue opportunities beyond rail ticket sales. The team helps connect customers with relevant media, advertising and partner offerings throughout their travel journey, creating value for both our customers and the business.
This is an exciting opportunity to help shape a growing area of Trainline, where engineering, product thinking and experimentation come together to deliver new experiences at scale and make a meaningful commercial impact.
Engineers work in cross-functional squads made up of iOS, Android, Web and Backend colleagues. Each squad is led by an Engineering Manager and partners closely with a Product Manager. We value open collaboration and a welcoming environment where everyone's ideas are heard.
In this role as the iOS Engineer, you will...
Build and deliver new features for the Trainline iOS app, with a focus on Trainline Media and helping grow revenue beyond traditional rail ticket sales.
Help shape how media, advertising and partner experiences are integrated into the app, ensuring they are seamless, relevant and valuable to customers.
Work closely with Product Managers, Designers and engineers to experiment with new ideas, measure their impact and continuously improve the experience.
Champion quality in everything you and your squad build, from thoughtful testing to constructive code reviews.
Continuously improve the codebase, leaving it simpler, healthier and easier for everyone to work in.
Keep customers at the heart of your decisions, balancing great user experiences with new commercial opportunities.
Spot and help remove obstacles, delays and wasted effort, so your squad can keep moving smoothly.
Contribute to technical decisions by sharing your perspective and helping shape the direction of a growing product area.
Support your teammates through coaching and mentoring, helping others to learn and grow.
Take ownership of the development lifecycle from code to production, including deployment and monitoring.
We'd love to hear from you if you have...
Hands-on experience building and shipping iOS apps with Swift, SwiftUI and UIKit, and ideally some exposure to Objective-C.
A genuine care for quality and for customers, with a track record of delivering reliable, well-tested features.
A strong product mindset, with an interest
More information:
Enjoy fantastic perks like private healthcare & dental insurance, a generous work from abroad policy, 2-for-1 share purchase plans, an EV Scheme to further reduce carbon emissions, extra festive time off, and excellent family-friendly benefits.
We prioritise career growth with clear career paths, transparent pay bands, personal learning budgets, and regular learning days. Jump on board and supercharge your career from day one!
We're operating a hybrid model and ask that Trainliners work from the office a minimum of 60% of their time over a 12-week period. We also have a 28-day Work from Abroad policy.
Our values represent the things that matter most to us and what we live and breathe everyday, in everything we do:
Think Big - We're building the future of rail
Own It - We focus on every customer, partner and journey
Travel Together - We're one team
Do Good - We make a positive impact
We know that having a diverse team makes us better and helps us succeed. And we mean all forms of diversity - gender, ethnicity, sexuality, disability, nationality and diversity of thought. That's why we're committed to creating inclusive places to work, where everyone belongs and differences are valued and celebrated.
Interested in finding out more about what it's like to work at Trainline? Why not check us out on LinkedIn, Instagram and Glassdoor!