Senior Mobile Developer

Endure Capital

. Design, build and ship features in the Numan app, owning them from technical scoping through release and post-launch monitoring .

Posted 10/28/2026full-timeRemote • LithuaniaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in native mobile app development using Swift and SwiftUI or Kotlin and Jetpack Compose, with a strong focus on app architecture, quality assurance, and compliance with UK GDPR and healthcare standards. Proven ability to mentor engineers, improve team practices, and deliver accessible patient-focused solutions.

Highest-signal resume keywords

Native Mobile DevelopmentSwift and SwiftUIKotlin and Jetpack ComposeMobile CI/CDUK GDPR Compliance

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Mobile ArchitectureMVVMUnit TestingUI TestingSnapshot TestingREST APIsGraphQL APIsModularisationDependency InjectionFeature Flagging

Soft Skills

Clear CommunicationMentoringCollaboration

Tools & Technologies

FastlaneBitriseGitHub ActionsXcode CloudApp Store ManagementGoogle Play Management

Industry Keywords

Patient Data PrivacyAccessibilityHealthcare RequirementsAgile MethodologySprints

Tech Stack

Tools & technologies

AndroidCloudGraphQLiOSKotlinSwift

About the role

Key responsibilities & impact

Design, build and ship features in the Numan app, owning them from technical scoping through release and post-launch monitoring
Write production-quality native code in Swift and SwiftUI or Kotlin and Jetpack Compose, with strong test coverage
Shape and evolve app architecture, including modularisation, state management, networking, offline behaviour and shared cross-platform patterns
Work with product and design to turn patient problems into simple, accessible experiences
Partner with backend engineers on efficient and secure API design
Own app quality, including crash rates, performance, startup time and WCAG accessibility
Use monitoring and analytics to identify and resolve issues
Improve mobile delivery pipelines, including CI/CD, automated testing, feature flags, phased rollouts and App Store/Google Play release management
Protect patient data through secure storage, authentication and privacy practices aligned with UK GDPR and healthcare requirements
Conduct constructive code reviews and write documentation, RFCs and PR descriptions
Mentor engineers, share knowledge and establish mobile team standards and practices
Interview candidates and help grow the team
Use AI coding assistants thoughtfully while maintaining quality

Requirements

What you’ll need

5+ years building mobile apps professionally, with at least one consumer app helped shipped and scaled on the App Store or Google Play
Deep expertise in native development on at least one platform: Swift and SwiftUI (iOS) or Kotlin and Jetpack Compose (Android)
Working knowledge of the other mobile platform is a plus
Strong grasp of mobile architecture, including MVVM, unidirectional data flow, dependency injection and modularisation
Experience with unit, UI and snapshot testing and building testable code
Experience with mobile CI/CD, such as Fastlane, Bitrise, GitHub Actions or Xcode Cloud, and managing releases end to end
Experience integrating REST or GraphQL APIs, including authentication, caching and error handling
Track record of owning large features or product areas and improving team engineering practices
Experience mentoring engineers and conducting useful code reviews
Clear communication with engineers and non-engineers and comfort working with product and design
Care for patients and understanding of privacy and accessibility in health products
Experience working in an agile team, delivering in sprints with product and design
Ability to work with special category health data in line with UK GDPR and healthcare requirements

Benefits

Comp & perks

Share options
25 days holiday, plus bank holidays, increasing to 30 the longer you stay with Numan
Health insurance with Vitality
Electric car salary sacrifice scheme with Octopus
Enhanced maternity and parental leave
A day off on your Birthday
Nursery benefit provided by YellowNest
Employee assistance programme, including access to therapy, financial planning and discounts
Generous pension, including employee and employer contributions
Flexible working options
Dog-friendly office in Farringdon
Personal training and development budget via Learnerbly
Wellhub membership, giving access to over 2,000 locations in the UK
Cycle to work scheme
Season ticket loan
Discount on Numan products for friends and family
Paid volunteering days
Additional 2 weeks off once you reach your 5th anniversary with Numan