Abdullah Khalid
Full-Stack TypeScript Engineer
Summary
Engineer with 6+ years of experience delivering production web systems and complex product workflows for remote teams and clients. Strong across TypeScript, React, Next.js, Node.js, Bun, relational data, real-time systems, cloud delivery, and domain-heavy HealthTech, FinTech, SaaS, and ecommerce applications.
Technical Skills
Experience
Interspeed
Jun 2023 — PresentFull-Stack TypeScript Developer · Remote
- Owned approximately 85% of an enterprise Laboratory Information Management System over 2.5 years, translating clinical and anatomical laboratory workflows into Next.js interfaces, Fastify APIs, MariaDB models, dynamic forms, reporting, and role-based access control.
- Built TypeScript crypto market infrastructure with Bun, Elysia.js, Redis, and WebSockets across centralized exchanges and Solana liquidity venues.
- Developed market monitoring, opportunity detection, fee-aware profitability checks, trade lifecycle persistence, and asynchronous execution workflows.
- Contributed targeted frontend and REST API modernization to an OpenEMR fork while preserving workflows in a mature PHP and MySQL codebase.
- Built and maintained production infrastructure with AWS, Docker, Linux, CI/CD, Grafana, and cloud-hosted databases.
Freelance / Contract
2020 — Feb 2023Web Designer & Web Developer · Remote
- Delivered 100+ website designs as part of a remote web-design team after an initial Fiverr engagement became longer-term direct work.
- Worked with several Fiverr and direct clients; both clients who left public reviews gave 5-star ratings.
- Built responsive business websites and interfaces, then progressed into frontend and full-stack work with JavaScript, React, Next.js, and Node.js.
- Completed contract ecommerce work spanning storefronts, products, orders, dashboards, integrations, revisions, deployment, and maintenance.
Selected Projects
Laboratory Information Management System (LIMS)
Private enterprise HealthTech platform for hospitals and diagnostic laboratories.
- Owned and delivered approximately 85% of the system over 2.5 years using Next.js, Fastify, TypeScript, and MariaDB.
- Implemented patient and sample workflows, clinical and anatomical laboratory processes, role-based access, dynamic forms, reporting, and operational automation.
Algorithmic Crypto Trading Platform
R&D platform for real-time market intelligence, arbitrage research, strategy validation, and automated execution architecture.
- Built real-time market-data ingestion and Redis-backed processing across centralized exchanges and Solana liquidity venues.
- Implemented cross-exchange opportunity detection, fee-aware profitability calculations, slippage and liquidity checks, simulation workflows, and trade lifecycle tracking.
Multi-Exchange Solana Trading Platform
Automated trading system coordinating centralized and decentralized exchange integrations.
- Built Bun, Elysia.js, Next.js, PostgreSQL, Prisma, Redis, and WebSocket workflows for market monitoring, balances, automated execution, and operational dashboards.
- Integrated Binance, KuCoin, Coinbase, dYdX, and Jupiter/Solana workflows with configurable thresholds and persistent trade state.
Education
Diploma in Computer Science & Engineering
Tangail Polytechnic Institute
Languages
English: Professional Working Proficiency · Bangla: Native