Senior Backend & Blockchain Developer — 5+ years building scalable backend services and Web3 solutions. I specialize in Node.js (NestJS/Express), distributed systems, and blockchain integrations across EVM and Solana. I design resilient APIs, event‑driven architectures, and high‑throughput services, and I lead teams to deliver secure, production‑grade platforms.
I'm a Senior Backend & Blockchain Developer focused on designing, building, and scaling backend platforms and Web3 products. I currently lead backend initiatives at Swop Technologies, where I architect services, mentor engineers, and ship features that power real‑time apps and crypto products.
What I bring:
- Backend: Node.js, TypeScript, NestJS/Express, REST/GraphQL, WebSockets, gRPC
- Blockchain: EVM (Ethereum, Polygon), Solana, smart contracts, wallet & token flows, Ethers.js, Web3.js, Anchor
- Data & Infra: PostgreSQL, MySQL, MongoDB, Redis, message queues, caching, rate‑limiting
- DevOps: Docker, NGINX, CI/CD (Jenkins/GitHub Actions), observability, Cloudflare Workers/D1
- Architecture: Domain‑driven design, event‑driven systems, microservices/monoliths, security best practices
Recent highlights:
- Led development of a decentralized wallet initiative, integrating EVM and Solana flows with secure key management and transaction pipelines.
- Delivered real‑time chat and backend services for product suites, improving reliability, throughput, and developer velocity.
- Drove API hardening, performance tuning, and CI/CD automation to reduce regressions and speed up releases.
I'm currently focused on backend services, blockchain solutions, and leading technical projects end‑to‑end. I enjoy collaborating on pragmatic architectures and contributing to high‑impact, production systems.
Skills and Expertise:
Languages:
- JavaScript (ES6+), TypeScript, Solidity, Python, Bash/Shell
Backend:
- Node.js (Express, NestJS), REST & GraphQL APIs, WebSockets, gRPC, event-driven architecture, microservices (NX), scaling and DevOps
Blockchain:
- Ethereum (EVM), Polygon, Solana, ERC-20/721/1155/4337, smart contracts, Ethers.js, Web3.js, Anchor, WalletConnect
Frontend:
- React.js, Next.js, Tailwind CSS
Databases:
- PostgreSQL, MySQL, MongoDB, Redis (Upstash/self-hosted)
Infrastructure / DevOps:
- Docker, Kubernetes, DigitalOcean, Vercel, NGINX, GitHub Actions, CI/CD, Cloudflare Workers & D1, observability & monitoring
Tools & Ecosystem:
- Git/GitHub, Postman, Stripe/Payments APIs, Alchemy, Firebase Admin, Redis (Upstash & self-hosted), Jira, Notion- 🏢 Currently working at Swop Technologies, leading backend initiatives.
- 🚀 Leading the development of a Web3 decentralized wallet across EVM and Solana.
- 🌐 Experienced in building serverless and edge applications using Cloudflare Workers and D1 database.
- 🎓 B.Sc. in Computer Science and Engineering from University of Asia Pacific.
- 🌱 Always learning and improving in distributed systems and blockchain.
Feel free to reach out to me at [email protected] or +8801686121793. You can also visit my portfolio at therakibul.me.