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Jobayer Hossain
@jobayer977
Senior Full Stack Engineer React NestJS SvelteKit Web3 AI
Bangladesh
English, Bengali
About me
Senior Full Stack JS Engineer with 6+ years building AI, Web3, and SaaS.
Services
- AI integrations (OpenAI, Claude)
- Web3 and blockchain systems
- Real-time (Socket.io, WebRTC, LiveKit)
- Full-stack (React, SvelteKit, NestJS, PostgreSQL)
- React Native mobile apps
- DevOps (Docker, CI/CD, AWS)
Projects
- aoebet.com: Web3 esports betting
- nuhello.com: AI voice platform, 20+ repos
- dentai.app: Healthcare SaaS, 3 portals
- blockfuze.com: Crypto custodial API
Why Me
- 6+ years, 7000+ GitHub contributions
- Full ownership, on-time delivery
Message me.
Skills
Jobayer Hossain
Offline •
See my services
Full Stack Web Applications
I will build your sveltekit web app or convert your site to svelte
Cross-Platform Development
I will build your react native mobile app for ios and android
Portfolio
Work experience
Freelancing Career
Part-time • 3 yrs 7 mos
Contract Full Stack Architect & DevOps Engineer - nuhello.com
Jan 2024 - Feb 2026 • 2 yrs 1 mo
Architected full platform across 20+ repositories. Built backend services with payment integration, authentication, and real-time communication via LiveKit. Integrated TTS/STT pipelines for AI-powered voice features. Owned CI/CD pipelines and cloud infrastructure.
Contract Full Stack Engineer - Blockfuze.Com
Nov 2025 - Feb 2026 • 3 mos
Built landing page and developer documentation site for an enterprise custodial crypto API platform using Next.js and TypeScript. Implemented real-time balance updates via SignalR, interactive API explorer with live request/response previews, and AML/KYC compliance showcases covering 30+ ERC-20 tokens including USDT, USDC, and DAI.
Contract Frontend Web3 Developer - aoebet.com
Aug 2024 - Nov 2025 • 1 yr 3 mos
Built landing page and developer documentation site for an enterprise custodial crypto API platform. Implemented real-time balance updates via SignalR, interactive API explorer, and AML/KYC compliance showcases covering 30+ ERC-20 tokens.
36 Reviews
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Rating Breakdown
- Seller communication level
- Quality of delivery
- Value of delivery
1-5 out of 36 Reviews
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yolanmaldonado
Repeat Client
France
this guy is THE GOAT better than any AI, quality first !! very hard working very reliable
Helpful?
mikefromseattle
Repeat Client
United States
Jobayer is very professional and smart. His English is very good, too. He understands projects and doesn't mind making corrections when necessary. I highly recommend him. He has no problem with Svelte, React, Github, CSS or HTML and is very responsive.
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mikefromseattle
Repeat Client
United States
Jobayer was very easy to work with and he understood my complex needs. I would definitely work with him again. He discussed with me the pros and cons of Svelte and React and helped me implement a real fix to my project.
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pa435546
Repeat Client
Palestinian Territories
Seller's Response
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rskriver
Denmark
Extremely quick. Perfect result and understood every part of technical request. Amazing service!
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