Joel Ekpenyong
Verified Expert in Engineering
Front-end Engineer and Developer
Abuja (F.c.t.), Federal Capital Territory, Nigeria
Toptal member since July 15, 2026
Joel is a senior front-end engineer with over five years of experience building high-performance web applications and Web3 dApps. His expertise spans TypeScript, Next.js, React Native, and zero-knowledge cryptography, with notable work at Keyring Network and CampaignCTRL. Joel led the front-end architecture for an institutional blockchain compliance platform and pioneered TLSNotary integration for React Native.
Portfolio
Experience
- React - 5 years
- Next.js - 5 years
- TypeScript - 5 years
- ÐApp - 4 years
- Sentry - 3 years
- React Native - 2 years
- Python - 1 year
- Rust - 1 year
Preferred Environment
Node.js, TypeScript, Rust, Next.js, React, React Native, Django, Python, PostgreSQL
The most amazing...
...platform I've built is a cross-platform blockchain compliance app with industry-first TLSNotary integration.
Work Experience
Senior Front-end Engineer
Keyring Network
- Spearheaded front-end architecture for institutional blockchain compliance platform, owning all codebases and establishing engineering standards across the organization.
- Pioneered industry-first TLSNotary integration for React Native, surpassing all competitors' webview approaches while architecting a production-ready cross-platform mobile application.
- Built production-grade browser extensions integrating smart contracts, wallet connectivity, zero-knowledge circuits, and zk-TLS proving.
- Implemented comprehensive monitoring using Sentry and CloudWatch for rapid incident response, improving observability and significantly reducing mean time to resolution.
- Contributed as a core R&D team member advancing zero-knowledge protocols and TLSNotary methodologies, requiring rapid upskilling into Rust for contributions to cryptographic component integrations.
- Engineered front-end zk-SNARKs integration enabling private transaction verification while maintaining regulatory compliance standards.
- Acquired proficiency in Solidity and Circom for smart contract interaction and zero-knowledge circuit development.
Front-end Developer
CampaignCTRL
- Played a key role in developing custom web solutions aimed at facilitating the political movements of CampaignCTRL's clients, including designing and implementing feature-rich, user-friendly web applications to support campaign efforts.
- Built a map view that visualizes data for different districts in the United States. This feature used technologies such as Node.js and Next.js, enabling the dynamic representation of key campaign data.
- Gained experience in using a diverse technology stack, including WordPress, Shopify, and React Native. This experience broadened my skill set and enhanced my adaptability to different technologies and platforms.
Front-end Developer
Signal Play Safe
- Drove the development of the admin dashboard that enabled efficient management and tracking of customer orders. It involved creating user-friendly interfaces, data visualization, and real-time updates for order tracking.
- Recognized the need for optimization and led the successful migration of the customer app from GraphQL to a RESTful API architecture, improving data retrieval efficiency, reducing latency, and enhancing overall system performance.
- Reviewed the work completed by other members of the team and provided detailed feedback and recommendations to elevate code quality, enhance maintainability, and align with best practices.
Front-end Engineer
MYAARI
- Improved and managed the front-end web interface, focusing on optimizing the user experience, enhancing visual appeal, and ensuring seamless navigation for visitors.
- Built a robust bulk messaging system using Node.js and the WhatsApp API via Twilio, facilitating efficient communication with customers and streamlining outreach efforts.
- Built a Node.js pipeline, which imported images from Google Spreadsheets, removed underlying backgrounds, and uploaded edited images to Google Drive, significantly improving image management and reducing manual workload.
- Developed and deployed several web bots using Landbot.io to enhance sales and communication processes. These bots provided valuable support in engaging customers and driving sales.
Experience
GarageHub Web Platform
https://garagehub.africa/Skills
Libraries/APIs
React, Playwright, React Hook Form, React Testing Library, REST APIs, Node.js, Wagmi
Tools
Sentry, Claude, GitHub, NPM, Vitest, Shadcn, Shadcn UI, Google Sheets
Languages
TypeScript, JavaScript, GraphQL, SAML, CSS, Rust, Python, Circom
Frameworks
Next.js, Tailwind CSS, Material UI, Jest, React Native, NestJS, Redux, Ant Design, Django
Platforms
Vercel, Amazon Web Services (AWS), Docker, Ethereum, Sitecore Experience Manager Cloud (XM Cloud)
Industry Expertise
Healthcare
Paradigms
Microservices
Storage
PostgreSQL
Other
ÐApp, APIs, Front-end Development, User Experience (UX), User Interface (UI), Dashboards, Multi-tenant Architecture, Server-side Rendering (SSR), Monorepos, Turborepo, OAuth, OpenID Connect (OIDC), Startups, Compliance, Front-end, Front-end Architecture, Accessibility, Design Systems, Web Content Accessibility Guidelines (WCAG), CI/CD Pipelines, CMS, WCAG 2, Figma to React, Single Sign-on (SSO), Component Libraries, SAML-auth, SAML 2.0, Software Design, Software Architecture, Application State Management, Responsive UI, Zustand, API Integration, Chrome Extensions, Full-stack Development, Supabase, Resend, Mobile App Development, Mobile Apps, Internalization, i18n, Storybook, Architecture, Google Drive, Web3, Smart Contracts
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