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David Cumps

PROFILE

David Cumps

Over six months, contributed to shapeshift/web and cake-tech/cake_wallet by delivering seven features and resolving three bugs focused on decentralized finance and cross-chain trading. Work included expanding Chainflip swapper support for assets like TRX, USDT, WBTC, and Arbitrum-based tokens, as well as integrating new API endpoints and automating swap workflows. Used TypeScript, Dart, and Flutter to implement backend integrations, UI updates, and localization improvements, ensuring consistent branding and enhanced user experience. Addressed reliability and security through configuration management and API key rotation, while refining error handling and retry logic to align frontend and backend behavior for seamless, resilient trading operations.

Overall Statistics

Feature vs Bugs

70%Features

Repository Contributions

10Total
Bugs
3
Commits
10
Features
7
Lines of code
3,491
Activity Months6

Your Network

51 people

Work History

June 2026

1 Commits • 1 Features

Jun 1, 2026

June 2026 monthly summary for shapeshift/web focusing on feature delivery and cross-chain expansion. Key work included delivering Tron TRX and USDT support within the Chainflip swapper, significantly broadening multi-chain trading capabilities and aligning with roadmap goals to reduce onboarding friction for Tron users. The work adhered to existing code patterns and strengthened transaction flow reliability for cross-chain assets.

March 2026

2 Commits • 1 Features

Mar 1, 2026

March 2026 — Cake Wallet (cake-tech/cake_wallet) delivered key trading enhancements and UI localization polish that boost business value and reliability. Features delivered: WBTC and USDT trading support on Chainflip, plus fixes for USDC and ETH on Arbitrum to improve cross-chain trading reliability. Bug fixes: Dutch localization corrections for clearer UI and consistency. Impact: Expanded asset support drives user engagement and potential trading volume; Arbitrum fixes reduce friction and error rate; localization improvements reduce support needs and improve onboarding for Dutch-speaking users. Technologies demonstrated: on-chain asset integrations, cross-chain troubleshooting, i18n/localization, clean commit hygiene and feature toggles. Commits: db0442003a3719e6654baa29b41373be49308102; 0c769bd04877bb386d8c3e90b43e22fe7f9e2f0a.

July 2025

1 Commits • 1 Features

Jul 1, 2025

July 2025 – Cake Wallet (cake-tech/cake_wallet): Implemented a major API integration update for the Chainflip exchange provider, upgrading to the new endpoints for quotes and swaps. The changes revise the swap quote path and incorporate new parameters (numberOfChunks, chunkIntervalBlocks) into swap requests, plus a refined selection algorithm to consistently use the highest quote. This work aligns the wallet with external API updates, improving pricing accuracy, swap reliability, and resilience to upstream changes, ultimately delivering faster, more competitive trades for users.

January 2025

1 Commits • 1 Features

Jan 1, 2025

Month: 2025-01 — Summary of work on shapeshift/web focusing on feature delivery, bug fixes, business value, and technical achievements. Key features delivered: - Chainflip Swap Retry Timing Alignment: Aligned retry behavior with the main Chainflip UI by increasing the default retryDurationInBlocks from 10 to 150 to ensure consistent swap retries across the app. This change reduces cross-component discrepancies and improves user experience during Chainflip swaps. Commit: bf7ed3f38ed0b46ecaf322cfa4f2bdf40c69b4fb (fix: bring retry duration in line with main chainflip UI (#8470)). Major bugs fixed: - Fixed misalignment of retry timing between shapeshift/web and the main Chainflip UI, addressing an inconsistency that could lead to unreliable retries. Overall impact and accomplishments: - Consistent swap retry behavior across frontend and backend, leading to more reliable Chainflip transactions and fewer user-facing failures. - Improved user trust and reduced support tickets related to swap retries. - Demonstrated end-to-end alignment work between UI and underlying retry logic, reducing fragmentation in swap flows. Technologies/skills demonstrated: - TypeScript/JavaScript engineering, Git versioning and commit discipline, cross-team collaboration for UI-logic alignment, and effective change management through a focused PR.

December 2024

2 Commits • 1 Features

Dec 1, 2024

Delivered two high-impact updates to shapeshift/web in December 2024, focusing on reliability, automation, and user visibility for Chainflip-based swaps. A clearer minimum-sell error reduces user confusion, while Chainflip DCA support enables scheduled automated swaps and real-time progress UI. The work includes a refactor of the swapper to support DCA and new status/quote models, paving the way for scalable automated trading and improved business outcomes.

November 2024

3 Commits • 2 Features

Nov 1, 2024

2024-11 Monthly Summary: Delivered branding-aligned UI update, stabilized pricing quotes, and reinforced security/access through API key rotation. This cycle improved branding consistency, pricing reliability, and operational resilience across the shapeshift/web repo. Key achievements: - Branding refresh: UI visual asset updated to Chainflip logo v3 in the multi-hop trade UI (commit abd0d4522807ef16334787a039964ba0b4ee289c). - Reliability improvements: Fixed quote timing and boost-fee calculation with more granular execution-time data (commit 53916c5eeb4fc64d9118535e35375f96aa415bab). - Security posture: API key rotated in the environment configuration to maintain uninterrupted service access (commit b8d37c625f686dc88040759d43bf26ec1e22abe2).

Activity

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Quality Metrics

Correctness91.0%
Maintainability88.0%
Architecture91.0%
Performance84.0%
AI Usage22.0%

Skills & Technologies

Programming Languages

DartJavaScriptTypeScriptenv

Technical Skills

API IntegrationAPI integrationBackend DevelopmentBackend IntegrationConfiguration ManagementCrypto SwappingDartDecentralized Finance (DeFi)FlutterFront End DevelopmentFrontend DevelopmentFull Stack DevelopmentReactState ManagementTypeScript

Repositories Contributed To

2 repos

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

shapeshift/web

Nov 2024 Jun 2026
4 Months active

Languages Used

TypeScriptenvJavaScript

Technical Skills

API IntegrationConfiguration ManagementFull Stack DevelopmentTypeScriptUI DevelopmentBackend Integration

cake-tech/cake_wallet

Jul 2025 Mar 2026
2 Months active

Languages Used

Dart

Technical Skills

API IntegrationBackend DevelopmentFlutterDartblockchain developmentlocalization