CandidateX
2022 - 2023Hiring platform with 10K+ users needed consistent UI and faster feature delivery
Problem solved
Design system that unified product experience
Business result
50% faster delivery
Mohamed Sassi
I help product teams clean up frontend debt and ship faster.
Senior frontend developer for products where the UI is slow to change, inconsistent, or hard for the team to trust.
I turn messy frontend systems into maintainable foundations: cleaner architecture, reusable UI, and smoother delivery.
Based in Canada
Available for contract work, senior frontend roles, and teams that need technical ownership without a rewrite.
Clean up frontend debtShip fasterBuild design systemsImprove product UI
Selected clients
IntuitTurboTax
LockeBioHealthcare EMR
St. Michael's HospitalHealthcare
CandidateXHR Tech
ReitiumFintech
City of RichmondGovernment
Problems I solve
Fix the system
- Frontend debt
- Architecture
- State flow
- Performance
Make UI reusable
- Design systems
- Shared components
- Accessibility
- UI consistency
Ship product work
- Dashboards
- Admin tools
- Portals
- Billing flows
- Auth
Support the backend
- APIs
- PostgreSQL
- Prisma
- Stripe
- CI/CD
Proof in shipped work
Reitium Crowdfunding
2021 - 2022Fintech platform that lets people invest in real estate without being accredited investors
Problem solved
Idea to production in record time
Business result
3 months to launch
Tractor at Home
2021 - 2022E-commerce site was losing customers at checkout because the flow was confusing
Problem solved
Complete checkout redesign
Business result
+15% conversions
Where I’ve done it
Sept 2024 – Present
Senior Frontend Developer (Full-Stack Scope)
LockeBio
- Led frontend architecture for a regulated healthcare EMR platform using React and TypeScript, including application structure, theming, and state management
- Built and maintained a shared component library to ensure consistent UI patterns and accelerate feature delivery
June 2020 – Sept 2024
Senior Front-End Developer (Contract)
MSDC LTD.
- Delivered frontend-led SaaS products, public-sector platforms, and internal tooling for startups and enterprise teams
MSDC Internal
Implemented end-to-end authentication including SSO and OAuth, supporting multiple client configurations
MyRichmond (Radical I/O Technology)
Delivered a city-wide citizen portal aggregating taxes, utilities, licensing, and waste services
Jul 2019 – Jul 2020
Senior Web Developer
St. Michael's Hospital
- Maintained and enhanced WordPress and Yii2 websites while ensuring HIPAA compliance
If frontend debt is slowing the team down, I can help clean it up without turning it into a rewrite.
Bring me in when features take too long, UI patterns keep drifting, or the team needs stronger frontend ownership.
Based in Canada
Usually replies within one business day.