Youssef HAJJI
Engineering robust, mission-critical architectures with Java (8-21) and Cloud-Native strategies. Specialized in modernizing financial flow systems for global banking leaders
Freelance remote | Available immediately
00. STRATEGIC PARTNERSHIP
I am a Senior Full Stack Consultant with a decade-long track record of architecting resilience for global financial leaders. My expertise lies at the intersection of cutting-edge Java ecosystems and mission-critical banking flows.
I don't just ship features; I build scalable, observable, and maintainable systems. By bridging the gap between complex business requirements and high-performance technical execution, I help organizations eliminate technical debt and accelerate their journey to the Cloud.
// My goal: To ensure that every line of code serves a clear business objective and survives the test of production-scale traffic.
Risk Mitigation
Applying DDD and Hexagonal Architecture to prevent legacy rot from day one.
Cloud Maturity
AWS Certified expertise to optimize infrastructure costs and serverless scaling.
Leadership
PMP & PSM II certified delivery, aligning technical teams with business milestones.
01. CORE EXPERTISE
Full Stack Dev
Java 21, Spring Boot, React, Angular, Material UI
Architecture
Hexagonal, DDD, Microservices, SOLID, Clean Code
Cloud & DevOps
AWS (Lambda, S3, DynamoDB), Docker, CI/CD, Terraform
Quality First
TDD, BDD (Cucumber), Gatling Performance, SonarQube
02. PROFESSIONAL JOURNEY
National Bank of Canada
2024 — 2025Senior Full Stack Developer (Java 21 / React / AWS)
- Migration of legacy payment flows to AWS Serverless (Lambda, EventBridge).
- Design of high-concurrency microservices with Spring Boot & Kafka.
- Full CI/CD integration using GitHub Actions & OpenShift.
Banque Desjardins
2021 — 2024Senior Full Stack Developer (Java / Angular / Azure)
- Strategic modernization of retail banking platforms.
- Enhanced system resilience through TDD and Clean Architecture.
- Optimized SQL performance for millions of daily transactions.
HPS (Casablanca)
2016 — 2020Senior Software Engineer (Java / Angular / PLSQL)
International deployment of PowerCard fintech solutions. Led the migration from legacy UI to a modern Angular stack for major financial institutions.
Harman International
2015 — 2016Software Engineer (C / C++). Development of CROSSWAY hospital management systems.
Software Engineering: Development and optimization of C/C++ modules for resource-constrained systems.
Interoperability: Development of communication components between lower layers and user interfaces.
M2M Group
2013 — 2015Software Engineer (JAVA/ ANGULAR/PLSQL)
Backend Development: Design of robust Java/JEE services for processing secure payment flows.
Web Migration: Active participation in the migration of the legacy solution to a modern web interface (PrimeFaces/JSF/React).
SQL Optimization: Writing and optimizing complex Oracle queries to ensure fast transaction response times.
Certifications
Education
State Engineer in Development
ENSA, Morocco | 2013
Software Engineering & Information Systems
DUT in Computer Science
EST, Morocco | 2010
Applied Computing & Systems