Senior iOS Engineer
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Job Location:
Monthly Salary:
Posted on:
15 hours ago
Vacancies:
1 Vacancy
Job Summary
About Popsa
Joining Popsa right now is pretty exciting. Were a London-based Certified B Corp building a memory curation platform that uses on-device intelligence and generative AI to help people find organise and relive the moments that matter turning noisy photo libraries into curated stories with minimal effort and high confidence.
Were also a proven international growth business. Popsa was recognised in Deloittes UK Technology Fast 50 (2022) making it our third year running on the list and was also ranked the 19th fastest-growing software company that year. The Financial Times ranked Popsa as the 5th fastest-growing technology company in Europe and highly ranked in 2022 and in 2023 we retained our place in the FT 1000 for a second year with an absolute growth rate of 1000% over the measured period.
Our apps and service operate at global scale localised across 12 languages shipping to 50 countries with most orders placed from outside the UK. More than 13 million people across 50 countries have used Popsa to turn their photos into something they can actually be proud to share.
People have never taken more photos than they do today but most of those memories end up buried in clutter. Popsa brings calm to that chaos automatically surfacing meaningful moments suggesting structure and themes generating captions and laying out designs so anyone can create something beautiful without design skills. From there we make it easy to bring curated memories into the real world with premium photo products including photo books calendars prints and photo boxes delivered internationally.
Private by design. Were deliberate about what is processed on-device what is uploaded and how customer content is protected so people can trust us with their most personal memories.
Scope
Youll 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. Youll work across features spanning photo selection AI-assisted layout generation payment processing and immersive product visualisation.
What you bring to the team
Were primarily looking for recent experience developing high-quality consumer-facing iOS apps where finesse performance and delight are priorities.
Core iOS expertise
- 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
Our 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
- Swift Structured Concurrency (async/await actors)
- Combine for reactive data flows and UI bindings
- 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
- 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
- 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
- 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
- Git proficiency with trunk-based development
- Pull request workflows with thorough code reviews
- 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
Concurrency & reactive programming
Graphics & visualisation
Photo library integration
Third-party integrations
CI/CD & quality
Version control & collaboration
Nice to have
We may use artificial intelligence (AI) tools to support parts of the hiring process such as reviewing applications analyzing resumes or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed please contact us.
Required Experience:
Senior IC
Key Skills
- APIs
- REST
- Design Patterns
- Objective C
- iOS Development
- Swift
- Application Development
- SDKs
- SQLITE
- IOS
- JSON
- Mobile Applications
About Company
Discover the fastest, easiest way to make a photo book, straight from your phone or tablet. Just pick your photos – our clever app creates the perfect layout instantly.
