Develop and enhance a memory curation platform with a focus on creating user-friendly iOS applications using Swift and related technologies. Collaborate on features like photo selection and payment processing.
Right now is one of the most exciting moments to join Popsa. Deloitte named us one of the UK’s fastest-growing technology companies, and the Financial Times recognised Popsa among the Top 5 fastest-growing software companies in Europe.
We’re backed by world-class investors, and the world is noticing. Our iOS and Android apps are available in 12 languages, trusted by more than 12 million people who have created over 5 million photobooks shipped to 50+ countries. With more than 350,000 five-star reviews, we’re one of the highest-rated consumer apps anywhere.
But the real story isn’t the numbers, it’s the memories behind them.
We’re living in a time where we capture more photos than ever before. Billions of moments sitting unseen in camera rolls and clouds, mixed with screenshots, receipts, or where we parked the car. We are great at documenting life… but not so great at preserving the meaning in it.
Popsa is changing that.
Since launching in 2016, we’ve built an award-winning platform that removes every barrier to transforming your favourite memories into something beautifully tangible. No design skills. No time-sink. Just the joy of holding real stories in your hands. A celebration of the people and moments that make life worth living.
This is only the beginning.
👉 Learn more about what it’s like to work at Popsa
👉 Read about the technology we're building
👉 Take a look inside our Soho HQ
About the Role
You'll be building and improving a sophisticated memory curation platform that helps users discover their best moments, and create beautiful, personalised products automatically. The app intelligently curates photos from users' libraries, uses on-device ML for face recognition and photo analysis, and renders high-fidelity 3D previews of physical products. You'll work across features spanning photo selection, AI-assisted layout generation, payment processing, and immersive product visualisation.
Expertise
- We’re primarily looking for recent experience developing high-quality, consumer-facing iOS apps where finesse, performance, and delight are priorities.
- Strong experience developing production apps with Swift
- Deep understanding of UIKit architecture, with growing proficiency in SwiftUI for building modern UI components in a hybrid codebase
- Familiarity with the Coordinator pattern for managing complex navigation flows
- Experience with MVVM and protocol-oriented design
- Understanding of the iOS app lifecycle, including background tasks, widgets, and app extensions
- Proficiency handling resources, permissions, and responsive UI across device sizes
Mindset
- A problem-solving, curious, and inquisitive attitude
- Clear communicator with a keenness to work collaboratively
- Constructive approach to code reviews and architectural discussions
Nice to Have
- Experience with custom drawing, Core Graphics, or advanced UI animations
- Performance optimisation and profiling with Instruments
- Accessibility best practices and VoiceOver support
- Experience integrating on-device ML models (CoreML, Vision)
- Background in 3D graphics or AR experiences
- Familiarity with localisation workflows for international apps
Tech Stack
- Architecture & data
- Swift Package Manager for modular dependency management
- Protocol Buffers for efficient data serialisation with our backend
- Core Data for on-device persistence
- Repository pattern for clean data access abstractions
- Concurrency & reactive programming
- Swift Structured Concurrency (async/await, actors)
- Combine for reactive data flows and UI bindingsGraphics & visualisation
- SceneKit and ARKit for immersive 3D product previews
- Custom Metal shaders for advanced rendering effects
- Vision and CoreML for on-device photo analysis and face recognition
- Photo library integration
- Deep PhotoKit integration for accessing and analysing user photo libraries
- On-device ML models for face embeddings and photo quality scoring
- Smart album generation and photo metadata synchronisation
- Third-party integrations
- Firebase (Analytics, Remote Config)
- Sentry for crash reporting and performance monitoring
- Stripe and Braintree for payment processing
- GrowthBook for feature flags and experimentation
- Nuke for high-performance image loading and caching
- CI/CD & quality
- GitHub Actions for automated linting, testing, and snapshot testing
- Xcode Cloud for continuous integration
- Fastlane for release automation
- SwiftLint for code style consistency
- Snapshot testing for UI regression prevention
To learn more about this role or the company, contact us through https://popsa.com/careers.
If you’re the sort of person who cares about the detail, and stays kind under pressure, you’ll fit in.
Top Skills
Arkit
Braintree
Core Data
Coreml
Fastlane
Firebase
Git
Github Actions
iOS
Metal
Nuke
Protocol Buffers
Scenekit
Sentry
Stripe
Swift
Swift Package Manager
Swiftlint
Swiftui
Uikit
Vision
Xcode Cloud
Popsa London, England Office
Kingly Street, London, United Kingdom, W1B 5PH
Similar Jobs
Fintech • Mobile • Payments • Software • Financial Services
As a Senior iOS Engineer, you will lead the development of high-volume features for Wise's mobile app, ensuring seamless user experiences and collaborating closely with product teams.
Top Skills:
Ci/CdGithub ActionsRest ApiSwiftSwiftui
Fintech • Mobile • Payments • Software • Financial Services
Own and build the iOS experience for account details, deliver scalable/testable features from ideation to production, partner on product roadmap, and collaborate with mobile engineers to improve UX and code quality globally.
Top Skills:
MvvmRest ApiStructured ConcurrencySwiftSwiftuiTcaViper
Energy
The Senior iOS Engineer will develop next-gen products for energy flexibility, working with Kotlin and Swift in a dynamic team focused on renewable energy solutions.
Top Skills:
Github ActionsJetpack ComposeKotlinSwiftSwiftui
What you need to know about the London Tech Scene
London isn't just a hub for established businesses; it's also a nursery for innovation. Boasting one of the most recognized fintech ecosystems in Europe, attracting billions in investments each year, London's success has made it a go-to destination for startups looking to make their mark. Top U.K. companies like Hoptin, Moneybox and Marshmallow have already made the city their base — yet fintech is just the beginning. From healthtech to renewable energy to cybersecurity and beyond, the city's startups are breaking new ground across a range of industries.
