Saif Eddine Marsit
SAIF MARSIT
ZenithTech
Leasigo
Tunisia Caccia
Trusted by +20 clients

I Build DigitalExperiences.

Senior Full-Stack Engineer. I architect and ship production-grade web platforms for businesses across Europe, the Middle East, and beyond.

Available for freelance work
Saif Eddine Marsit
0+
Years in Production
0+
Projects Shipped
0+
Clients Worldwide
REACT.JSNEXT.JSNODE.JSTYPESCRIPTNESTJSDOCKERAWSTHREE.JSANGULARFIGMA
REACT.JSNEXT.JSNODE.JSTYPESCRIPTNESTJSDOCKERAWSTHREE.JSANGULARFIGMA
100% Free, No Strings Attached

I’ll audit your site for free before you invest a cent.

Most agencies pitch first and deliver later. I do it the other way around. Drop your URL and I’ll send you a detailed audit report on performance, SEO, UX, and conversion gaps, with concrete fixes you can act on immediately.

Performance Benchmarks
Your load times benchmarked against competitors, and what the gap is costing you in conversions.
SEO Opportunities
3 to 5 specific technical and content fixes that can move your ranking within 30 days.
Conversion Blockers
The specific UX and trust signals causing drop-offs before visitors take action.
Prioritized Roadmap
What to fix first, what to defer, and why. Ordered by business impact, not technical complexity.

“His technical expertise, attention to detail, and ability to troubleshoot challenges on the fly were impressive.”
- Hamza B., CEO @ZenithTech

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30 seconds to fill out. Your report lands in your inbox within 48 hours.

No spam. No sales pitch. Just a genuine audit of your site.

Saif Eddine Marsit
ABOUT ME

I don’t just write code. I solve business problems with software.

I’ve been building things with computers since I was sixteen, starting with graphic design and video editing before writing my first lines of code at eighteen. My first real project was a book-selling platform I built for a school professor. I never stopped after that.

Through university I freelanced constantly, led a tech team delivering real client projects, and mentored students along the way. I took a part-time backend role at a startup while still studying, then moved into enterprise environments. Every role was remote, every delivery was production-grade.

Today I’m a Frontend Engineer at a French company and run an independent practice serving clients across Tunisia, France, and Dubai. 5+ years in, 20+ satisfied clients, and every single one came back or referred someone. This isn’t a career I chose. It’s just what I’ve always done.

What gets me out of bed: projects that need to scale. Distributed systems, high-traffic architectures, complex business logic that most developers avoid. The harder the problem, the more interesting the work.

LanguagesEnglish, French, Arabic
LocationTunisia (Remote Worldwide)
SpecializationFull-Stack Web Development
WHAT I DO

Engineering that ships.

01

Platform Engineering

Architecture-first thinking, end-to-end ownership. I design and build complete web platforms from database to deployment. One engineer, zero handoff gaps.

  • React / Next.js
  • Node.js / NestJS
  • TypeScript
  • PostgreSQL / MongoDB
02

Performance Engineering

Bundle optimization, load testing, and infrastructure tuning. I’ve cut storage costs by 7x and shaved seconds off load times. Speed is a feature, not an afterthought.

  • Core Web Vitals
  • Bundle Analysis
  • Load Testing
  • Caching Strategies
03

Data & Backend Systems

Multi-cloud architectures, and real-time systems. I build the backend layer that makes your product actually scale.

  • Real-Time Systems
  • Multi-Cloud
04

Interactive 3D & Web Experiences

WebGL-powered brand experiences that stop the scroll. I build production-grade 3D interfaces with Three.js and React Three Fiber, not just demos.

  • Three.js
  • React Three Fiber
  • GSAP
  • WebGL
05

DevOps & Cloud Infrastructure

Containerized deployments, automated pipelines, and cloud infrastructure on AWS and Azure. Your app stays up, scales on demand, and deploys in minutes.

  • Docker
  • AWS / Azure
  • Jenkins
  • CI/CD
06

Security & Hardening

Infrastructure hardening, and secure-by-default across every layer. I don’t bolt security on at the end. It’s built into the architecture from day one.

  • SSL / TLS
  • Fail2ban
  • Secure Architecture
STACK

Technologies I ship with daily.

Frontend

React.jsNext.jsAngularTypeScriptThree.jsReact Three FiberGSAPTailwind CSS

Backend

Node.jsNestJSExpressREST APIsGraphQL

Database & Cloud

PostgreSQLMongoDBSupabaseAWSAzureDockerJenkinsCI/CD

AI-Powered Workflow

ClaudeCursor IDEAI-Assisted Development

Other

FigmaGitScrum / AgileJestReact Query
CLIENT WORDS

Don’t take my word for it.

Saif did an incredible job developing our new website. He took our complex requirements and turned them into a seamless, high-performing platform. His technical expertise, attention to detail, and ability to troubleshoot challenges on the fly were impressive. I highly recommend Saif for any web development project.
H
Hamza Bchiri

CEO & Founder @ZenithTech

February 2026
I had the pleasure of working with Saif on our website, tunisiacaccia.com, over the past months, and it’s been a great experience. He is incredibly responsive and has a real talent for understanding exactly what the client wants, which is the best part. He was extremely helpful throughout the process, and his expertise truly shows, the booking system works flawlessly, and the website functions smoothly. On top of that, he’s a fun and approachable person to work with, which makes the collaboration even more enjoyable. If you’re looking for someone who knows what they’re doing, is easy to work with, and delivers results, I highly recommend Saif.
R
Rawand Ferjani

CEO @Tunisia Caccia Travel

September 2025
THREE WAYS TO WORK TOGETHER

Let’s talk about your project.

1
Free Website Audit
Understand what’s holding your site back before committing
Get your free audit
2
Strategy Call (30 min)
You have a clear need. Let’s scope it together
3
Full Project Engagement
Budget approved, timeline set. Let’s execute

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Tell me where you are and what you need. I respond within hours.

Average response time: under 4 hours