Freelancers using React in CalgaryFreelancers using React in Calgary
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James Sheldon's avatar
James Sheldon
proCalgary, Canada
Full-Stack Engineer · Custom Apps & AI Automation
3x
Hired
5.0
Rating
8
Followers
Full-Stack Engineer · Custom Apps & AI Automation
Cover image for Meilisearch / React Instant Search Integration @ Contra
Meilisearch / React Instant Search Integration @ Contra
0
51
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Extended Biography
0
84
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Transaction Log @ Contra
0
68
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Riverside Spa Calgary
0
57
React(3)
Lee Mulvey's avatar
Lee Mulvey
proCalgary, Canada
Web development wizard 🔮
1x
Hired
4
Followers
Web development wizard 🔮
Cover image for Seamless DeFi Integrations for Core dApp
Seamless DeFi Integrations for Core dApp
0
4
Cover image for Overview I led development of Core's
Overview I led development of Core's DeFi integrations for core.app/deposit (https://core.app/deposit) and core.app/borrow (https://core.app/borrow), bringing Aave and Benqi market interactions directly into the Core dApp experience. The goal was to let users supply and borrow without having to leave Core, while preserving the same trust model users expect from onchain finance: direct wallet signatures, transparent contract calls, and predictable transaction outcomes. What We Built We shipped two production user flows: Deposit: supply supported assets into protocol markets and track updated positions. Borrow: open and manage borrow positions with real-time collateral and utilization context. Both flows were designed to feel native to the Core product while still exposing protocol-level information users need to make safe decisions. Technical Approach The integration stack centered around React, Typescript, and Wagmi for wallet + chain orchestration. Under the hood, we integrated directly with Aave and Benqi contracts rather than proxying protocol actions through an offchain layer. This gave us tighter control over call construction, clearer error surfaces, and stronger alignment with protocol behavior. Key implementation areas included: Contract write/read hooks for supply, withdraw, borrow, and repay lifecycle actions. Market and account state normalization across protocol-specific response shapes. Unit/decimal conversion utilities to avoid precision and display drift. Gas-aware UX states and transaction feedback for multi-step actions. Defensive handling around approvals, allowance edge cases, and chain-specific failures. UX and Product Considerations DeFi interactions can fail for many reasons, so we treated status and clarity as first-class features: Preflight checks before submission to reduce avoidable failures. Explicit loading/success/error transaction stages. Contextual copy around collateral health and borrowing implications. Predictable refresh behavior after confirmations so balances and positions settle cleanly. Impact This work enabled Core users to access lending and borrowing opportunities from a single interface, reducing friction between discovery and execution. From an engineering perspective, the project established reusable DeFi integration patterns in Core Web that can be applied to future protocol integrations with less implementation overhead. Stack React Typescript Wagmi EVM smart contract integrations Aave + Benqi protocols
0
38
Cover image for Short-circuit evaluation in React
Short-circuit evaluation in React
0
27
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Portfolios by Contra
0
147
React(6)
Dax Manning's avatar
Dax Manning
proCalgary, Canada
Senior Software Engineer | UI/UX Design | AI Automation
$1k+
Earned
1x
Hired
5.0
Rating
17
Followers
Senior Software Engineer | UI/UX Design | AI Automation
Cover image for I’ve been working on a
I’ve been working on a healthcare web app lately. Focused a lot on security, clean UI, and making it actually simple for real patients and doctors to use. It’s been challenging but honestly really rewarding to build something that can help people in real life.
1
213
Cover image for I worked on the Sadra
I worked on the Sadra platform, a product shopping application where I built core shopping features such as product listings, user flows, and checkout functionality, with a focus on performance and usability.
4
218
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I recently completed a product promotion website for xpromo.com.au (http://xpromo.com.au), focused on presenting the product clearly, improving user engagement, and supporting marketing and lead generation goals.
2
180
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I’m currently working on a healthcare application focused on improving patient data management and care workflows. I’ve been involved in designing, developing, and integrating core features while ensuring security, reliability, and compliance with healthcare standards.
1
165
React(5)
Shawn Grover's avatar
Shawn Grover
Calgary, Canada
Versatile Engineer: Web, Servers, Python Expert
Versatile Engineer: Web, Servers, Python Expert
Cover image for Municipal Census Tool
Municipal Census Tool
0
14
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Safety Inspections
0
10
Cover image for Radio Firmware
Radio Firmware
0
16
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Michelle Poon's avatar
Michelle Poon
Calgary, Canada
Rapid Web Development: Custom Sites in Days
Rapid Web Development: Custom Sites in Days
Cover image for Rapid Portfolio Development
Rapid Portfolio Development
0
9
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Multi-page website
0
6
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Custom E-commerce Solution
0
4
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React(3)
Umar Aftab's avatar
Umar Aftab
Calgary, Canada
SEO/Writing/Product Management/Flutter Development
SEO/Writing/Product Management/Flutter Development
Cover image for umar-aftab/MyReads-BooksAPI
umar-aftab/MyReads-BooksAPI
0
6
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Flutter App
0
9
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Python E-Book
0
4
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