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zeeperfect8

Quan Dav

@zeeperfect8

Smart code, Scalable solutions

Nigeria
Anglais, Allemand, Espagnol, Chinois
Certaines informations sont présentées en anglais.
À propos de moi
FULL-STACK ENGINEERING | SAAS | AI SOLUTIONS I build scalable web applications & intelligent software solutions that solve real business problems. EXPERTISE: SaaS & Custom Web App Dev React, Next.js, TypeScript & Node.js Backend APIs & Third-Party Integrations PostgreSQL, MongoDB & Database Design AI Integration, LLMs & RAG Pipelines MY APPROACH Clean architecture. Maintainable code. Reliable integrations. Responsive user experiences. Whether you're launching new product, or integrating AI into your workflow, I focus on building practical, scalable solutions aligned with your goals.... Plus d’infos

Compétences

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zeeperfect8
Quan Dav
hors ligne • 

Voir mes services

Sites Web personnalisés
I will create premium web application saas web app custom web application, saas website
De80 $US / projetPlus de détails

Expérience professionnelle

CONTREBRASSENS

AI Systems Engineer

CONTREBRASSENS • Freelance

Sep 2025 - Present • 1 yr 1 mo

Developed AI-powered systems and integrated large language models (LLMs) into production web applications to support intelligent workflows and contextual information retrieval. Key responsibilities: • Designed retrieval-augmented generation (RAG) pipelines for knowledge-based AI applications. • Integrated LLM APIs into existing web applications. • Enhanced AI assistants to retrieve and use relevant contextual information. • Worked with PostgreSQL and pgvector for scalable vector search infrastructure. Focus: AI integration, RAG systems, knowledge retrieval, and production-ready application architecture.

BrainyZat

Senior Software Engineer

BrainyZat • Freelance

Feb 2024 - Nov 2025 • 1 yr 9 mos

Led the development of scalable web applications and backend services for SaaS and e-commerce clients, focusing on performance, maintainability, and reliable system architecture. Key responsibilities: • Built full-stack applications using React, Next.js, and TypeScript. • Developed scalable backend APIs with Node.js and Express. • Designed and optimised PostgreSQL database schemas and queries. • Implemented secure authentication using OAuth2 and JWT. • Built microservices-based architectures for modular applications. • Containerised services with Docker and supported CI/CD deployments. Focus: Full-stack engineering, backend architecture, database optimisation, application security, and scalable software delivery.

CoinGecko

Web3 Application Developer

CoinGecko • Freelance

Apr 2022 - Oct 2025 • 3 yrs 6 mos

Developed blockchain integrations and decentralised application features for Web3 platforms, focusing on smart contract functionality and seamless interaction between blockchain networks and web interfaces. Key responsibilities: • Developed and deployed Solidity smart contracts on the Ethereum blockchain. • Built Web3 frontend interfaces using React and Ethers.js. • Implemented smart contract interaction layers for token transactions and on-chain data retrieval. • Developed dashboards to monitor blockchain transactions and token metrics. Focus: Solidity, Ethereum, smart contract development, Web3 integration, and blockchain data visualisation.