EXCEEDS logo
Exceeds
Mat Schmid

PROFILE

Mat Schmid

Over 18 months, Mats engineered robust payment and onboarding flows in the stripe/stripe-ios and stripe/stripe-android repositories, delivering 63 features and resolving 29 bugs. He modernized core SDKs by adopting Swift Concurrency and Kotlin, refactored authentication and consent flows, and enhanced UI/UX for Link, CryptoOnramp, and Financial Connections. Mats implemented analytics instrumentation for A/B testing, improved test reliability through CI/CD and E2E automation, and strengthened security with attestation and authentication level systems. His work emphasized modular architecture, cross-platform consistency, and developer experience, resulting in scalable, observable codebases that improved reliability, compliance, and user experience across Stripe’s mobile ecosystem.

Overall Statistics

Feature vs Bugs

68%Features

Repository Contributions

203Total
Bugs
29
Commits
203
Features
63
Lines of code
34,776
Activity Months18

Work History

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026 monthly summary focusing on security enhancements and reliability improvements for Link user authentication in stripe-android. Delivered a new Authentication Level System to enforce a defined minimum authentication level for Link users and refined verification logic to improve security and integrity. Completed backend and test refinements to support the new flow, including removal of hasVerifiedSMSSession from AccountStatus and fixes for failing tests, yielding more robust authentication behavior and test stability.

January 2026

1 Commits • 1 Features

Jan 1, 2026

January 2026 – Stripe Android: Updated Crypto Onramp test credentials to a new account to ensure tests reflect current configurations and data. This aligns test data with latest account setup, improving test reliability and CI feedback for crypto onramp flows. The change is recorded under commit e150f451289f1ed762f84d711d90695a79f0db70 with message "Use new account for our crypto onramp tests (#12235)", enabling traceability and easier future credential refreshes.

December 2025

1 Commits

Dec 1, 2025

Month 2025-12 Monthly Summary for stripe/stripe-react-native: Delivered stability improvements to the Android initialization path of the Stripe React Native SDK and hardened error handling for uninitialized keys. This work reduces runtime failures in production, improves developer feedback loops, and supports a more reliable in-app payments experience.

November 2025

1 Commits

Nov 1, 2025

November 2025 (2025-11) summary for stripe/stripe-android: Focused on stabilization and reliability in the Android SDK, with a targeted bug fix to reduce CI noise and protect release velocity. No new user-facing features this month; effort was devoted to improving test stability and end-to-end reliability.

October 2025

1 Commits

Oct 1, 2025

Month: 2025-10. Focus on stability and user-facing clarity for Stripe React Native Android Connect integration. No new features released in stripe/stripe-react-native this month; major activity centered on diagnosing and communicating a bug in the Android Connect flow that affects US bank accounts when using the Mobile Payment Element. The team delivered a clear remediation path via release notes and a CHANGELOG warning, helping users upgrade to a patched version and reducing support churn.

September 2025

29 Commits • 6 Features

Sep 1, 2025

September 2025 monthly work summary for Stripe iOS ecosystem. Focused on delivering business-value features, stabilizing the CryptoOnramp flow, enhancing observability, and upgrading SDK dependencies to enable new capabilities. Key across-repo efforts included authentication resilience, UX improvements in Crypto Onramp, robust livemode testing support, and alignment of analytics naming conventions with product experiments.

August 2025

29 Commits • 10 Features

Aug 1, 2025

August 2025: Delivered cross-repo improvements across iOS and Android for onboarding, payments, and consent flows. Key features include iOS CryptoOnramp integration updates with new wallet address collection, Onramp workflow alignment and MoR key usage, and Onramp SDK modernization. UI/UX enhancements in Link, instrumented analytics for AB tests, stability fixes in KYC, and a release-ready build for 24.22.0 with Apple Pay entitlements. These changes improve conversion, compliance, and backend consistency, while delivering a more robust, observable, and scalable platform.

July 2025

23 Commits • 13 Features

Jul 1, 2025

July 2025 performance summary: Delivered a broad set of features and stability fixes across iOS, Android, and React Native SDKs with emphasis on merchant onboarding, Link/PayWithLink UX, and test reliability. Notable work includes migrating the FC Example app to sandbox environments, extensive LinkController and PayWithLink refactors, and merchant data enhancements, complemented by CI/CD improvements for FC E2E test reporting. These efforts reduce merchant friction, improve reliability of payment flows, and provide better visibility into failures for faster remediation.

June 2025

17 Commits • 4 Features

Jun 1, 2025

June 2025 monthly summary: Delivered notable iOS and Android features, fixed critical bugs, and advanced architecture for safer feature delivery. Key initiatives included UI/UX refinements in Payment Element and Link flows, FC Lite modularization with feature flag, and backend URL migration for Financial Connections with rollback. Impact: improved user onboarding and verification flows, fewer crashes, more reliable tests, and a scalable, modular codebase.

May 2025

14 Commits • 4 Features

May 1, 2025

May 2025 monthly summary for stripe-ios. This sprint delivered a cohesive set of Link and payments enhancements, coupled with analytics instrumentation and onboarding UX improvements that drive business value through smoother user flows and better data-driven decisions. Key accomplishments span UI/UX polish, accessibility considerations, and robust integration work across Link and Financial Connections. Key features delivered: - Link UI and Verification Enhancements: Modal presentation for the Link flow and accessibility tweaks on the Verification screen to improve usability and keyboard/navigation experience. - Payment Methods UI/UX and Bank/Account Integration: Improvements to the payment method picker and wallet UI, support for Financial Connections, bank accounts, defaulting behavior, and shipping address data; dark mode refinements (icon fixes) and header color states. - Link A/B Test Exposure Analytics: Added exposure logging integrated with the analytics framework to enable measurement of the new Link feature experiment when the feature is active. - Signup/Login UX Enhancement: Streamlined onboarding by disabling the login/signup button until an email is detected, reducing friction for both known and new users. Major bugs fixed: - Alignment issues in Link navigation bar and modal presentation in FlowController (#4867) and related commits. - Corrected color and UI states for Link payment method header (highlight color, dark mode icon fixes) (#4924, #4877). - Removed extra icons in add payment method row and ensured shipping address data is provided in PaymentOptionDisplayData (#4925, #4942). - Fixed default handling for bank accounts added in Link to prevent unintended defaults (#4948). - Enabled adding bank accounts in Link and improved support for existing consumers in Financial Connections (#4933, #4932). Overall impact and accomplishments: - Significantly smoother onboarding and payment experiences that reduce user friction and improve conversion. - Improved visibility into product experiments via AB test exposure analytics, enabling data-driven decisions. - Strengthened accessibility and UI consistency across Link and Financial Connections flows, with better dark-mode support. - Built a foundation for future experimentation and feature rollouts through robust instrumentation and configurable defaults. Technologies/skills demonstrated: - iOS UI/UX design and implementation, modal navigation, accessibility considerations, and dark-mode theming. - Integration with Financial Connections and bank account workflows. - Analytics instrumentation for AB tests and exposure tracking. - Feature flag awareness and iterative UI/UX refinement based on user feedback and data.

April 2025

17 Commits • 4 Features

Apr 1, 2025

April 2025 monthly summary focusing on delivering strategic user-facing features, improving reliability, and strengthening observability across Android and iOS. The work advanced cross-repo initiatives on payments, data access, and UI consistency, while tightening quality gates to reduce risk in production releases.

March 2025

16 Commits • 5 Features

Mar 1, 2025

March 2025 mobile SDK efforts delivered a robust asynchronous Financial Connections experience, expanded consent flow capabilities, and introduced FC Lite, while stabilizing CI. The React Native integration benefited from an SDK upgrade and theming enhancements, reinforcing cross-platform consistency and security.

February 2025

14 Commits • 3 Features

Feb 1, 2025

February 2025 monthly summary focusing on key accomplishments across stripe-ios. This month delivered major UI/UX enhancements for the Financial Connections flow, security hardening of sensitive data handling, and release stability improvements that collectively increase product value and reliability.

January 2025

16 Commits • 5 Features

Jan 1, 2025

January 2025 (2025-01) – Stripe iOS development monthly summary. Key features delivered: - MPE (Multiple Payment Experiences) integration in the Financial Connections app: end-to-end support for multiple payment experiences with StripePaymentSheet; startup issues on physical devices resolved. - Attestation and verified flows security enhancements: added app attestation, new mobile sign-up endpoints, attestation parameters on API requests, synchronization attestation, logging, and web-based error handling for attestation errors. - Testing enhancements for verified flows: introduced a verified test merchant and stabilized test cases to improve reliability of verified endpoints and testing coverage. - Swift Concurrency API client adoption: introduced a Swift Concurrency-based API client and enabled async API client by default for testing and migration practicality. - Dark mode support and styling improvements: refactored color management for dark mode and added UI styling options including a style picker and a dark mode configuration API in the FC Sheet playground/example apps. Major bugs fixed: - Resolved startup issues when using MPE integration on physical devices in the FC demo app. - Fixed linked libraries and dependency wiring for the FC Example app to ensure stable builds and runtime. - Ensured attestation parameters are always passed to /synchronize and improved error handling by surfacing web-based flows when attestation errors occur. - Improved testing reliability by adding a verified test merchant and stabilizing test cases (e.g., temporary changes to token-case tests). - Completed migration steps for Swift Concurrency API client, reducing integration friction for async calls. Overall impact and accomplishments: - Delivered end-to-end MPE capabilities, enabling multiple payment experiences within the Financial Connections flow, which expands product flexibility for customers. - Strengthened security posture for verified flows with app attestation and robust error handling, reducing risk in onboarding and sign-up scenarios. - Improved testing coverage and reliability for verified endpoints, leading to faster iteration and higher confidence in releases. - Accelerated modernization through Swift Concurrency migration, improving development velocity and testing consistency. - Enhanced user experience with dark mode support, creating a consistent look-and-feel across apps and improving accessibility. Technologies/skills demonstrated: - Swift, Swift Concurrency (async/await), and modern API client patterns - Stripe iOS SDK integration (StripePaymentSheet) and MPE workflows - App attestation, mobile sign-up and lookup endpoints, and secure API request patterns - Web-based error handling flows for attestation - UI theming, dark mode refactoring, and theming APIs - Testing strategies including verified merchants and test stabilization Top 3-5 achievements: - Implemented MPE integration and StripePaymentSheet wiring in the FC demo app; resolved startup issues on physical devices. (Commits: bca708519b75af6979b5d9a774b95d88b2b90c24; c584c2b6c60ecfc014f5eb654e601a48ec0772e7; a5eb63d32f514540f239b170286ef3d324fd5b85) - Hardened verified flows with app attestation, new mobile endpoints, and assured attestation parameters on API calls, with logging and web-flow fallbacks. (Commits: 8c97bb44b8d28a485e4410746d91b2b56dffab4d; 165dcf05c41f01090209bf7b334ff72b710409b8; 659309da5a1f254a40c4e34cd5cd4bb462ec3140; 310439cf173e1cd9c157ddb0439be998994f9c03; 158282563b78a17c6337fc57a445ca66ed95fdbc; 08f1e67f603d58cf5f7d59e4c768dec61558ebd9) - Expanded testing for verified flows with a dedicated test merchant and improved test stability. (Commits: c7c0cfa57411d39b8f26b205b35a0793e0998fe8; 2115b42f7b7ef80690193a7f1ac7370faa08e0e5) - Adopted Swift Concurrency API client and default async usage to simplify migration and testing. (Commits: 93ee7c7516463f9c37bfd0d10c5ac8fd946502f4; a8baad45cc2f2a296279f46c3f7a2b58ad93a5d2) - Introduced dark mode support and styling improvements including a style picker and dark-mode API in FC Sheet examples. (Commits: c2bccf21d73b01dd8a6137f22c25945086790842; 3506ee63458de4772a574f47e22ed38f05bf186d; 847b7cb8e025699addbb5a0e72910c4c43813aba)

December 2024

2 Commits • 1 Features

Dec 1, 2024

December 2024 — Stripe iOS SDK 24.1.1 release for stripe/stripe-ios delivering targeted bug fixes and stability improvements. Focus areas included animation reliability for PaymentSheet, fixes for Instant Bank Payments issues, and enhanced developer experience through improved console logging and explicit Link Card Brand mappings to aid integration debugging. The work strengthens merchant onboarding and reduces support overhead by improving observability and end-to-end reliability.

November 2024

13 Commits • 2 Features

Nov 1, 2024

November 2024 focused on delivering robust payment flows in stripe-ios, tightening incentive-related behavior, and boosting test reliability. Key work included enhancements to web authentication and payment sheet UX, enforcing single-account behavior, and stabilizing CI and UI tests. These changes reduce payment errors, improve conversion and cross-platform incentive consistency, and raise overall release quality.

October 2024

7 Commits • 3 Features

Oct 1, 2024

2024-10 monthly summary for stripe-ios: Delivered API and UX enhancements that improve data capture, authentication UX, and user messaging, while stabilizing edge cases to boost reliability and merchant confidence. Major work includes API-level BillingAddress integration across payment flows, prefill improvements for login/auth across Link Login and Financial Connections, updated microdeposits messaging to set user expectations, and a bug fix stabilizing email prefill and uppercase email handling in the payment details API.

September 2024

1 Commits • 1 Features

Sep 1, 2024

September 2024: Delivered Panther Instant Debits flow integration in stripe-ios by updating the Instant Debits flow to use the /share endpoint for Panther payments, enhancing the payment method response handling and overall checkout reliability. No major bugs fixed this month. Impact: smoother Panther payments, reduced failure modes, and a clearer response structure for downstream analytics. Technologies: Swift, REST API integration, and endpoint-driven flow changes. Commit trace: BANKCON-14531 implemented in stripe-ios (PR #4063), commit c5f41e2d89232560ce1d03f9c659e74597693886.

Activity

Loading activity data...

Quality Metrics

Correctness96.2%
Maintainability89.4%
Architecture91.0%
Performance89.0%
AI Usage73.2%

Skills & Technologies

Programming Languages

KotlinMarkdownObjective-CRubySVGShellSwiftTypeScriptXMLYAML

Technical Skills

A/B TestingAPI DevelopmentAPI IntegrationAnalyticsAnalytics IntegrationAndroid DevelopmentAndroid developmentApple PayAsynchronous ProgrammingAuto LayoutBackend CommunicationBackend IntegrationBitriseCI/CDCocoaPods

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

stripe/stripe-ios

Sep 2024 Sep 2025
13 Months active

Languages Used

SwiftYAMLRubySVGXML

Technical Skills

API IntegrationSwiftiOS DevelopmentAPI DevelopmentBackend IntegrationPayment Processing

CocoaPods/Specs

Sep 2025 Sep 2025
1 Month active

Languages Used

Ruby

Technical Skills

CocoaPodsDependency ManagementMobile DevelopmentPackage Management

stripe/stripe-android

Apr 2025 Feb 2026
7 Months active

Languages Used

RubyKotlinMarkdown

Technical Skills

Rubyscriptingversion controlAndroid DevelopmentBackend IntegrationKotlin

stripe/stripe-react-native

Mar 2025 Dec 2025
4 Months active

Languages Used

MarkdownObjective-CRubySwiftTypeScriptShellYAMLKotlin

Technical Skills

API IntegrationDependency ManagementMobile DevelopmentReact Native DevelopmentUI/UX CustomizationiOS Development