(Senior) iOS Mobile Engineer

Our client is an early-stage fintech company building a new mobile-first investment platform for global markets . The company is developing a product that makes investing across international markets feel as simple as investing domestically - bringing together brokerage, FX, funding, portfolio management and market information into a single, intuitive experience. The business is backed by an experienced founding team and is now expanding its engineering team as the product moves from early development towards production. This is an opportunity to join at an unusually early stage and have a direct influence on the architecture, product and engineering standards of the mobile platform. What you will do: Take ownership of the native iOS application using Swift and SwiftUI Help define and evolve the application's architecture and technical direction Build and refine core investment, account, funding and portfolio experiences Design mobile experiences that clearly communicate transaction and account states to users Build secure authentication, session management and local data handling Work closely with backend engineers on APIs, data models and edge cases Ensure financial information is displayed accurately, including currencies, prices, percentages, timestamps and data freshness Handle real-world mobile considerations such as unreliable networks, background execution, push notifications and application lifecycle Take responsibility for application performance, stability and crash rates Manage App Store releases, including review requirements, privacy considerations, entitlements and release quality Identify and address mobile security risks and vulnerabilities Contribute to product decisions and technical trade-offs in a fast-moving startup environment What you will need: 6+ years of professional iOS development , or equivalent depth of experience Strong commercial experience building and maintaining native iOS applications Excellent knowledge of Swift Strong experience with SwiftUI , with a good understanding of when UIKit remains appropriate Solid understanding of iOS architecture, application lifecycle and platform capabilities Experience with areas such as secure storage, biometrics, authentication, push notifications, background execution, code signing and App Store distribution Experience working on applications where security, reliability and data accuracy are important Strong debugging and performance-profiling skills Experience taking ownership of an application rather than simply implementing individual features Comfortable working in an environment where requirements aren't always fully defined Good English communication skills and the ability to work directly with senior technical stakeholders Nice-to-haves: Experience in any of the following: Fintech, banking, brokerage, payments or investment applications Trading or order-management systems KYC / onboarding flows Portfolio or financial-account applications Financial data and market-data products Mobile application security High-volume consumer applications Push notifications, widgets, background processing or other deeper iOS integrations Experience working with international products or users across multiple market