Hi, I'm Mohamed Sassi
Full-Stack Developer based in Kingston, ON.
Building fast, scalable web applications for startups and high-growth companies.
I specialize in React, TypeScript, and modern frontend architecture, with experience building design systems, component libraries, and scalable SaaS platforms. I work across the full stack when needed, comfortable with Node.js, PostgreSQL, and backend APIs.
9+ years building for companies ranging from Intuit to early-stage startups. Currently leading EMR development at LockeBio and building my own SaaS platform (MSDC).
Skills
Backend & Database
Experience
- Expanding from frontend ownership into backend development with Nest.js, Prisma, and PostgreSQL, building RESTful APIs for core EMR features
- Leading development of a full-scale EMR system using React, TypeScript, and Chakra UI, setting up project scaffolding, theming, and form/state management with React Hook Form, Redux Toolkit, and Vite
- Building a shared component library within a pnpm-based monorepo (Nx for build orchestration), enabling standardized themes and faster product delivery
- Improving frontend performance by optimizing data flow and aligning architecture with the evolving product roadmap
- Building SaaS platform with modular architecture and automated billing using Stripe
- Architecting API orchestration with Hono.js and Drizzle ORM for scalable deployments
- Delivering production-ready design system enabling rapid client customization
- Refactored two enterprise React apps with Redux and MUI, reducing load times and improving interaction speed
- Implemented Storybook-driven component development supporting consistent theming and faster feature delivery
- Advocated modern build tooling (Vite, TypeScript strict mode) to strengthen developer experience
- Rebuilt public site using Nuxt 3 and Directus including page builder, blog system, and student portal
- Improved infrastructure performance with Railway and Cloudflare
- Supported client demos that helped secure new partnerships
Projects
LockeBio EMR
Full-scale electronic medical records system with React, TypeScript, and Chakra UI across multi-org portals and provider dashboards
2024 - PresentCandidateX
Company-wide design system and admin dashboard for hiring platform serving 10K+ users, built with Chakra UI and Nx monorepo
2022 - 2023Reitium Crowdfunding
Fintech platform enabling fractional real-estate investment with React, Redux Toolkit, and TailwindCSS
2021 - 2022Tractor at Home
E-commerce platform with inventory management, CMS integrations, and checkout optimization
2021 - 2022Open to Opportunities
Actively seeking full-stack roles at early-stage or high-growth startups. If you're building something interesting and need someone who can move fast across the stack, let's talk.
Kingston Ontario, local time: