ljrr3045dev

Senior Full Stack Engineer | Ai & Web3 Product Developer | React, Node.Js, Solidity | Cursor & Claude Code Expert

Full Stack Software Engineer specializing in Web3 protocols and AI product development. Over 5 years of experience building applications from 0 to 8K+ active users and optimizing platforms to drive over $6M in funding.

🚀 MEASURED IMPACT:
- Web3 Growth Engine: Engineered an ICO dApp utilizing Solidity, Ethers.js, and Wagmi; optimized frontend performance (reducing LCP and INP), boosting conversion rate from 40% to 90%, contributing directly to a $6M capital raise.
- Product Scale: Spearheaded the full-stack architecture of a scalable B2B/B2C application from scratch, scaling it seamlessly to over 8K+ active users on AWS and Serverless infrastructure.
- Team Leadership: Guided Agile/Scrum teams of 5-6 developers, driving clean code standards, microservices migration, and robust automated testing (Jest, Cypress) to reduce production bugs.

💻 TECHNICAL STACK:
- Frontend: React, Next.js, TypeScript, React Native, Expo, Redux, Responsive UX design.
- Backend & DB: Node.js, Nest.js, Serverless, PostgreSQL, MongoDB, RESTful API design.
- Web3: Solidity, Smart Contracts, Hardhat, Ethers.js, Wagmi, dApp Development.
- AI Systems: Retrieval-Augmented Generation (RAG), LLM integration, Prompt Engineering.

🤖 AI-AUGMENTED SOFTWARE ENGINEERING:
I build software at the speed of thought. By orchestrating advanced agentic coding workflows, I utilize Cursor, Claude Code, and OpenCode in tandem with custom Model Context Protocol (MCP) servers. I write and maintain Git-versioned agent instructions (CLAUDE.md,.cursorrules) and custom agent skills (.ai/skills) to compress traditional software delivery lifecycles by 3x. I don't just generate code; I leverage AI agents under strict architectural boundaries, verifying every change through structured CI/CD pipelines.

📈 TARGET ROLES:
Looking for Senior Frontend, Full Stack, or AI/Web3 Software Engineer roles in fast-paced startups where I can scale products and implement next-generation AI workflows.


Experience: 5 years

Yearly salary: $60,000

Hourly rate: $30

Nationality: 🇻🇪 Venezuela

Residency: 🇻🇪 Venezuela


Experience

Senior Frontend Developer
Rather Labs
2025 - 2025
Leading frontend development at a premier blockchain technology consultancy specializing in enterprise Web3 and DeFi solutions for global clients. • Architected and deployed production-ready React.js and Next.js applications for decentralized finance (DeFi) protocols, managing state synchronization and Web3 provider integrations for platforms handling 7-figure daily volumes. • Engineered an enterprise-grade UI/UX component library, implementing responsive design standards that accelerated client-side feature delivery by 35% across multiple engineering teams. • Optimized Web3 frontend performance by streamlining heavy dependency bundles and improving Core Web Vitals (including Largest Contentful Paint and Interaction to Next Paint), achieving a 40% reduction in initial dApp loading latency. • Enforced frontend development best practices and testing pipelines using Jest and Cypress, establishing robust CI/CD code quality gates and reducing production bugs by 20%. • Collaborated cross-functionally with smart contract and backend developers to design seamless API endpoints and secure on-chain event listeners.
Senior Full Stack Developer
Archivista
2025 - 2026
Building next-generation digital legacy infrastructure to preserve and protect valuable digital assets through certified, tamper-proof on-chain records. • Designed and built high-performance backend microservices using NestJS and TypeScript, implementing reliable database schemas, RESTful APIs, and transaction-indexing services to guarantee high API availability. • Led technical planning and system design for core digital ledger features, collaborating with the product team to turn high-level business goals into scalable software architecture. • Orchestrated automated CI/CD release pipelines and environment infrastructure within Azure DevOps, accelerating delivery predictability and reducing deployment friction. • Refactored and optimized Next.js frontend interfaces, incorporating custom state management to display complex blockchain-based assets with minimal layout shift and rendering delay. • Leveraged agentic software engineering workflows using Cursor and Claude Code with Model Context Protocol (MCP) servers, writing custom `.ai/skills` and `Git-versioned` rules (`CLAUDE.md`, `.cursorrules`) to automate boilerplate generation and speed up feature implementation by 2.5x.
Senior Full Stack Developer
Brillion
2024 - 2025
Developed enterprise-grade Web3 Wallet-as-a-Service (WaaS) infrastructure powering B2B/B2C solutions for Web3 companies and international financial institutions. • Collaborated directly with the executive leadership team to define high-availability software architectures based on strategic product roadmap requirements. • Built secure, low-latency serverless backend infrastructures on AWS, utilizing AWS Lambda, API Gateway, and DynamoDB to handle unpredictable transaction loads with automatic scaling. • Created reusable SDKs and frontend component libraries to power client integrations, directly enhancing developer experience (DX) and decreasing third-party onboarding times by 30%. • Enforced strict software quality standards, maintaining a 95%+ testing coverage rate across critical services using automated integration tests and comprehensive mocking frameworks.
Technical Lead
Brillion
2023 - 2024
Led technical engineering for the Brillion Smart Wallet v1 application, managing cross-functional development teams and driving successful product launches. • Successfully launched the Brillion Smart Wallet v1 application, scaling the platform from initial MVP stages to serving over 8,000+ active monthly users. • Managed and mentored a cross-functional team of 5-6 software engineers (frontend, backend, and QA) using Agile/Scrum methodologies, improving overall sprint velocity by 25%. • Architected a highly secure dApp connection layer, designing the wallet's system topology to comply with fintech security audits and smart contract interaction constraints. • Supervised the high-risk infrastructure migration of the NexeraID Wallet into Brillion, resolving critical performance bottlenecks and enhancing overall wallet responsiveness by 40%. • Established engineering standards across the organization, including standardized code review checklists and Git branching policies.
Full Stack Developer
ComPilot (ex NexeraID)
2022 - 2023
Developed the NexeraID Smart Wallet application, implementing cutting-edge decentralized identity and smart account standards. • Implemented the EIP-2771 meta-transaction standard for gasless transactions, designing robust relayer integrations that successfully reduced dApp user onboarding friction by 80%. • Built and optimized a flexible Web3 authentication module, supporting over 5 major wallet providers (including MetaMask, WalletConnect, and Coinbase Wallet) using Wagmi and Ethers.js. • Assumed temporary team lead responsibilities during critical launch preparation sprints, keeping development timelines on track and aligning cross-functional teams.
Full Stack Developer
Little Phil
2022 - 2022
Developed a micro-philanthropy Shopify application enabling seamless charitable donation flows for global e-commerce merchants. • Designed and implemented the full-stack system architecture for both client layers and payment processing services. • Built and deployed a production-ready Shopify App using the Shopify App CLI, complying with strict App Store verification and performance standards. • Collaborated directly with the CTO to deliver the first functional MVP of the Shopify integration on schedule and with 0 critical launch bugs.
Blockchain Developer
Freelance
2021 - 2022
Provided specialized smart contract architecture, protocol auditing, and Web3 consulting services for early-stage startups and decentralized applications. • Audited and deployed 15+ custom smart contracts on Ethereum and Polygon mainnets, executing manual code analysis and static analysis tools to identify and fix critical security gaps. • Designed and customized token architectures complying with ERC-20, ERC-721 (NFTs), and ERC-1155 standards, utilizing OpenZeppelin libraries and testing frameworks like Hardhat. • Provided high-level technical consulting for DeFi protocols and tokenomics structures, optimizing gas consumption to lower on-chain execution fees by 25%.

Skills

ai
blockchain
blockchain-engineer
css
ethereum
front-end
full-stack
hardhat
javascript
jira
nestjs
nextjs
node
react
serverless
solidity
tailwind
typescript
english
spanish