Tom Angistalis

Senior iOS Developer • London, England, UK

• • Built fully native, high-performance trading features with ultra-low-latency data pipelines and real-time price updates achieving ~5-7ms render times
• • Co-architected a custom SwiftUI components DSL that composes trading screens directly from backend Order Ticket models (rules, layouts, validation)
• • Worked on a server-driven UI system supporting live streaming price updates, backend-driven layouts and instant dynamic configuration
• • Optimised the WebSocket streaming stack to handle thousands of updates per second
• • Shipped production features using SwiftUI (since v1), Combine, Swift Concurrency (async/await)
• • Refactored critical parts of the app like positions, orders, order ticket
• • Owned mobile DevOps across CFD and Invest apps. Led large-scale architecture modernisation: Swift Packages, modular refactoring, removal of legacy UIKit code, Xcode Previews and build performance improvements
• • Owned CI/CD: GitHub Actions migration, automated unit/UI/snapshot testing, memory-leak detection, device-farm test suites
• • Partnered closely with design, backend and product teams to deliver high-quality trading features across multiple asset classes
• • Mentored developers, led code reviews, wrote extensive documentation and guides, authored ADRs and internal engineering standards

Indie iOS Developer • London, England, UK

• • A full-stack film/TV tracking platform spanning iOS, web, backend and edge-compute services. Shipping fast and supporting major Apple platforms (iPhone, iPad, Mac and Vision Pro)
• • Integrated RevenueCat since 2020, including subscriptions, entitlements and product configuration
• • Initially developed a custom declarative UIKit framework (inspired by Airbnb Epoxy & Spotify Hub Framework) for API-driven screen composition
• • Built the entire product end to end: SwiftUI iOS app, SvelteKit web app, and Cloudflare Workers + Vapor backend API
• • Deployed backend services using Docker and DigitalOcean, plus Cloudflare Workers for caching, routing, security and load balancing
• • Designed and operated a scalable data layer using MongoDB and Firebase services
• • Used AI tools daily (Cursor, Copilot, Claude Code) to accelerate prototyping and architectural iteration

Indie iOS Developer • London, England, UK

• • A private project focused on real-time AI video journaling
• • Created a polished SwiftUI iOS app using The Composable Architecture (TCA) and supporting background uploads, offline mode and real-time AI feedback
• • Integrated OpenAI Realtime API for instant user feedback, speech-to-text, translations, summaries and personalised AI suggestions
• • Built a globally distributed backend using Cloudflare Workers for serverless APIs, scheduled tasks and async job processing
• • Implemented a scalable video pipeline using Cloudflare R2 for storage and Cloudflare Stream for adaptive playback
• • Used Supabase for database, authentication, row-level security and metadata storage

Senior iOS Developer • San Francisco, CA, USA (Remote from Thessaloniki, Greece)

• • Lead developer of iOS projects in multiple client projects
• • Working remotely with teams based in Bangalore and San Francisco
• • Collaborating closely with UX/UI Designers and providing input during all the design phases
• • Composing architectural design documents and diagrams
• • Everyday practice of scrum based agile development methods
• • Used TestFlight for deployment, usage tracking, crash reporting and remote logging
• • Managing App Store Connect accounts and submitting apps to the App Store
• • Ran technical interviews for engineering applicants
• • Pre-sales support with estimates and participation in sales pitches

iOS Developer • San Francisco, CA, USA

• • Responsible for the product applications
• • Re-wrote from scratch Night Stand HD v2 for iPhone and iPad. "The alarm clock app Apple forgot": 3.5 million users, #1 Top Paid app in App Store for a year and Top 10 in Utilities for 3 years
• • Lead iOS Developer on Twine, a disruptive dating app for iPhone. Reached 200,000 users and was featured in TechCrunch, Mashable, Glamour, Time and Business Insider
• • Worked for 3 months at San Francisco developing Twine app and collaborated closely with designers and backend developers for rapid prototyping and iteration

Senior iOS Developer • Hamburg, Germany (Remote)

• • Helped with initial kick off to convert an Invision prototype about restaurant reservations to a fully native Swift iOS application
• • Collaborated with designers on rapid prototyping
• • Fully customised UI design
• • Travelled multiple periods to work on company's offices and test and deploy the app on a real production environment (Cruise ship)

Co-founder - iOS Developer • Krinida, Amphipolis, Greece

• • Lead Developer and Co-founder of the company along with four other founding members
• • Coordinated the business end of the company by preparing project proposals and closing contracts with prospective clients

Twine and Twine Canvas

• • Fully customised UI
• • Real time chat with push notifications, tracking delivery and read receipts based on XMPP messaging service
• • Twine uses a patented technology to analyse profile interests and generate real-language conversation starters
• • Worked extensively on tests and optimisations for speed and fidelity to enhance the user experience
• • Implemented analytic services for detailed product analysis

Night Stand HD 2

• • Developed v2.0 from scratch for iPhones and iPads
• • "The alarm clock app Apple forgot": 3.5 million users
• • #1 Top Paid app in App Store for a year
• • Top 10 in Utilities for 3 years