You will get a Secure, Optimized Web App with Clean Design (Spring | JS | Python)
Project details
I'm a full stack developer specializing in Java Spring Boot, JavaScript, and Python. What sets me apart is my focus on three things most freelancers treat as afterthoughts: performance, security, and clean design — built in from day one, not patched on later.
Whether you need a new web application built from scratch or an existing project optimized and secured, I write clean, maintainable code and communicate clearly at every step. You'll always know what's happening with your project, and you'll get source code, documentation, and support even after delivery.
I treat every project like it's my own product — reliable, well-tested, and built to scale.
Whether you need a new web application built from scratch or an existing project optimized and secured, I write clean, maintainable code and communicate clearly at every step. You'll always know what's happening with your project, and you'll get source code, documentation, and support even after delivery.
I treat every project like it's my own product — reliable, well-tested, and built to scale.
Programming Languages
JavaScript, Python, JavaCoding Expertise
Performance Optimization, Security, DesignWhat's included
| Service Tiers |
Starter
$50
|
Standard
$120
|
Advanced
$350
|
|---|---|---|---|
| Delivery Time | 3 days | 7 days | 15 days |
Number of Revisions | 1 | 2 | Unlimited |
Number of Pages | 3 | 7 | 8 |
Design Customization | - | ||
Content Upload | - | ||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$15 - $400
Deployement to cloud
(+ 2 Days)
+$50
1-on-1 code walkthrough call
(+ 1 Day)
+$20Frequently asked questions
About Younes
Spring Boot Backend Engineer | Secure APIs, OAuth2/Keycloak, Fintech
Casablanca, Morocco - 1:22 pm local time
Most Spring Boot APIs I'm called in to look at fail on the same handful of things: refresh-token rotation misconfigured in Keycloak, IDOR on resource endpoints because authorization is checked at the controller instead of the data layer, JWT validation that trusts the alg header, and multi-tenant queries missing a tenant filter. I find these for a living on both sides — I write the code and I break it.
What I do:
- Spring Boot 3 / Java 21 REST APIs — clean domain modelling, virtual threads where they earn it
- Spring Security: OAuth2, JWT, Keycloak realms, RBAC, multi-tenant isolation
- Security review of an existing Spring codebase — OWASP API Top 10, written report with reproduction steps and patches
- Angular / Next.js front ends when you need one hand on the whole stack
Background: Senior engineer in a bank's digital factory, working on payment and fraud-adjacent microservices. Independent security researcher. Java/Spring core with Docker, Kubernetes, and CI/CD.
Send me your repo or your problem and I'll tell you straight whether I'm the right fit before you spend a dirham.
Steps for completing your project
After purchasing the project, send requirements so Younes can start the project.
Delivery time starts when Younes receives requirements from you.
Younes works on your project following the steps below.
Revisions may occur after the delivery date.
Client purchases the project and sends requirements
I review requirements and confirm scope