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Nasreddine Hanafi

@nasreddinehanafi

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Software engineer at Oracle building Java payment services and GPU-accelerated vector search.

Morocco

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At Oracle, I develop Java microservices and PL/SQL for high-availability enterprise payment systems. I also manage database changes with Liquibase and support production services.

As a Research Assistant on Oracle’s PGX Team, I implemented GPU-based HNSW graph construction in C and C++ with NVIDIA CAGRA. It achieved roughly 8–9× faster index construction than the 8-thread parallel CPU baseline, with equivalent search time and recall.

I built reproducible Python benchmarking tools to measure latency, recall, and scalability, and presented results that informed the team’s indexing roadmap. I also designed a hybrid approach with GPU graph construction and CPU approximate nearest-neighbour search.

My personal projects include an HTTP/1.1 server, a Unix shell, a virtual machine, and a ray tracer, built from scratch in C and C++. My background in mechatronics and industrial automation also includes PLCs, microcontrollers, and electronics.

Experience

Work history, roles, and key accomplishments

Current

Fullstack Developer

Current

Oracle

Aug 2024 - Present (2 years 2 months)

Develop and maintain Java microservices with Helidon for high-availability enterprise payment systems, exposing REST APIs consumed by multiple internal teams. Write and maintain Oracle PL/SQL stored procedures and queries carrying core business logic and data access for payment workflows.

Java Helidon Oracle Database Pl SQL REST APIs Liquibase Docker Maven Git CI CD

Research Assistant, Vector Database

Oracle

Feb 2024 - Aug 2024 (6 months)

Implemented HNSW graph construction on GPU in C/C++ using NVIDIA CAGRA, reaching roughly 8–9× faster index construction than an 8-thread parallel CPU HNSW baseline. Designed a hybrid GPU/CPU architecture and built reproducible benchmarking tooling in Python.

C C++CUDA NVIDIA CAGRA HNSW Python Linux GDB

Education

Degrees, certifications, and relevant coursework

1337 School

Software Engineering Track, Software Engineering

2021 - 2024

Peer-to-peer, project-based curriculum in systems programming, OS internals, networking, computer graphics, algorithms, and software architecture, with core projects built from scratch in C and C++ on Linux.

Faculté des Sciences Dhar El Mahraz

Licence Professionnelle (Bachelor's degree), Mechatronic & Embedded Systems

2020 - 2021

Licence Professionnelle in Mechatronic & Embedded Systems, covering analog and digital electronics, control of mechatronic systems, industrial instrumentation, automation, embedded systems, and professional placement.

IFMIA Kénitra

Technicien Spécialisé, Automated Systems

2018 - 2020

Two-year technical diploma in industrial automation, covering C programming, PLCs, microcontrollers, electrotechnics, instrumentation, control engineering, pneumatics, and hydraulics, with 640 hours of industrial placement per year.