"We need a senior engineer who actually owns the backend."
I take full ownership — architecture, code, deployment, and production. Your team ships. I make sure the backend holds.
Open to new projects · Remote, UK / Europe / US
Fix your SaaS bottlenecks.
Scale your backend.
Ship faster.
I help SaaS teams build backend systems that scale — and take full ownership so your team can ship fast without tech debt.
23s → 2s
Client payment API
3M+
Monthly users · Platform I built
Trusted by
NexityOrange CyberdefenseConecsWizaplaceNessma TV
01 Sound familiar?
The problems I was built for
"Our backend is slowing down our product — and every release gets harder."
I remove the bottlenecks, clean up the architecture, and make the system easy to evolve again.
"Our APIs are a mess and we're afraid to touch them."
I redesign APIs to be clean, structured, and ready to scale with your business.
"We're doing too much manually and it's killing our velocity."
I automate the workflows draining your team's time and creating operational risk.
"We want AI features but don't know where to start."
I find where AI genuinely improves your product and build it properly — not a proof of concept.
Sound like your situation? Let's talk →
02 Services
What I help you achieve
01
Scalable backend systems that don't break under growth
Architecture, reliability, and clean code — built to last beyond the first release
02
APIs your team can actually build on
Clean, structured API design — reliable today, built to scale as your product grows
03
Less manual work, more product velocity
Automate the operational overhead that slows your team down every sprint
04
Real AI features, not just experiments
Identify where AI creates actual value in your product and ship it as a real feature — not a demo
03 Proven results
Projects I've delivered
Long-term engagements across regulated industries, high-traffic platforms, and SaaS products. Detailed case studies available on request.
Nexity · France's #1 real estate group · 4 years
Backend & API Modernisation
Technical referent for backend architecture decisions in a multi-team enterprise environment. Led the full production migration from Vue 2 / Nuxt 2 to Vue 3 / Nuxt 3. Conducted code reviews and provided architectural guidance across teams.
LaravelVue.jsNuxtREST APIsCI/CD
→ Tech lead on production migration · Zero downtime · France's #1 real estate platform
Conecs · Regulated payment platform · France
API Performance & Secure Backend
Redesigned and optimised critical APIs for a regulated payment platform handling sensitive financial data. Structured complex business domains using DDD and hexagonal architecture with full auditability.
PHPDDDHexagonal ArchitectureREST APIs
→ API response time reduced from 23s to 2s · Audit-ready in a regulated environment
Orange Cyberdefense · Ongoing
Backend Engineering
Feature development on projects with strong performance and scalability constraints. Involved in architecture decisions, code quality improvements, and collaboration with product, UX and DevOps teams.
PHPLaravelVue.js
→ Production features delivered on enterprise cybersecurity software · Active engagement
Nessma TV · International media network
High-Traffic Web Platform
Built and maintained web applications and REST APIs for a media platform with a large regional and international audience. Focused on performance, caching, and SEO for content-heavy systems.
PHPREST APIsMySQLRedis
→ 3M+ unique monthly users · High-availability production systems
Wizaplace · Multi-tenant SaaS marketplace
SaaS Platform Engineering
Built and extended a large Symfony-based multi-tenant marketplace platform. Designed REST APIs and a PHP SDK to enable third-party integrations for external clients and partners.
PHPSymfonyREST APIsSDK
→ Core PHP SDK used by every Wizaplace client — the backbone of all marketplace deployments
Need results like these? Book a 30-min call →
Side projects & open source
MakeResume
LiveSaaS resume builder designed and built end-to-end. Full ownership from architecture to production — auth, payments, document generation, AWS infrastructure, and monitoring.
- Subscription-based model
- PDF document generation
- 8 languages
- AWS · CloudFormation (IaC)
- Monitoring & alerting system
LaravelVue.jsTypeScriptStripeAWSCloudFormation
makeresume.io → Cryptobox
Open sourceZero-dependency encryption library for JavaScript and TypeScript, built exclusively on the Web Crypto API. Designed for developers who need modern cryptographic primitives without external dependencies.
- AES-256-GCM encryption
- PBKDF2 key derivation
- Timing attack protection
- Zero dependencies
TypeScriptWeb Crypto API
GitHub → laravel-membership
Open sourceLaravel package for polymorphic SaaS memberships — manages who belongs to what and with which role across any Eloquent model. Designed for multi-tenant SaaS apps, teams, and workspaces.
- Polymorphic across any Eloquent model
- Enum-based roles with hierarchy
- Guard protections (last owner, self-demotion)
- Event dispatching + query scopes
- PHP 8.3+ · Laravel 11/12/13
PHPLaravelEloquentComposer
GitHub → laravel-secure-fields
Open sourceLaravel package for field-level encryption on Eloquent models — AES-256-GCM encryption with a natural developer experience. Built for GDPR and HIPAA compliance contexts.
- AES-256-GCM encryption with random IV per value
- Searchable encrypted fields via blind indexes (HMAC-SHA256)
- Key rotation without downtime
- Field masking & serialization protection
- Audit logging for access trails (GDPR/HIPAA)
- PHP 8.3+ · Laravel 11/12/13
PHPLaravelAES-256-GCMOpenSSLComposer
GitHub → 04 Why me
Why work with me
I take responsibility for your backend — not just the code
Architecture decisions, code quality, production reliability — I own it end to end, not just the ticket assigned to me.
I optimise for your outcomes, not engineering vanity
The goal is a system that serves your business. I cut complexity that doesn't earn its place.
3M+ users. Regulated platforms. Zero tolerance for downtime.
I've built and maintained systems where failure is not an option — and delivered under the pressure and constraints that matter.
I can lead, not just execute
Code reviews, architecture guidance, cross-team alignment — done at enterprise scale, across multi-team environments.
05 Testimonials
What clients say
“A developer I trust completely. He gets up to speed fast and delivers quality work. He works equally well independently with a PO or within a larger development team. I highly recommend him.”
Adrien P.
Engineering Manager · Nexity
Le Hibou
December 2024
“I worked with Adel for 3 years at Nexity. A serious and reliable developer, always focused on code quality and project delivery. He integrates quickly into a team, takes initiative, and delivers on time. I recommend him for backend/fullstack missions in demanding environments.”
Mokhtar O.
Full Stack Engineer · Nexity
May 2026
06 Discovery call
What we'll do in a discovery call
In 30 minutes, here's what you'll walk away with:
- Review your current product and architecture
- Identify key technical or product challenges
- Outline a clear path forward
This is not a general chat — this call is focused on your project and next steps.
07 Engagements
How we can work together
Backend ownership
Main3–4 days/week · 3–6 months minimum
→ For teams who need a dedicated backend owner
From £700/day · $950/day · €800/day
Targeted intervention
Fixed scope · 2–4 weeks
→ For critical backend problems with a clear objective
Fixed-price · scope on request
Book a discovery call
Focused 30-min call to review your backend challenges and identify next steps
Contracts in GBP · USD · EUR
About
Built for high-traffic platforms and regulated environments.
SaaS companies hit a wall when their backend can't keep up — slow APIs, fragile architecture, and tech debt that blocks every new release.
I'm Adel Zemzemi, a backend engineer based in Paris. I've built and scaled production systems for high-traffic platforms — from a TV network serving 3M+ monthly users to France's #1 real estate group.
I work with SaaS founders and CTOs who need full technical ownership: architecture decisions, API design, code quality, and production operations — not just ticket execution. Available for clients across the UK, US, and Europe.