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Nabil Lejri

@nabillejri

Mechatronics engineer at Fraunhofer HHI who optimized optoelectronic soldering processes and achieved a 30x MEMS tuning-ratio improvement.

Germany
Message

At Fraunhofer Heinrich Hertz Institute, I design and fabricate CAD-based prototypes for optical components using additive manufacturing. I also optimize soldering processes for optoelectronic assemblies and prepare surfaces for optical characterization and integration.

For my master’s thesis with Fraunhofer IPMS and BHT Berlin, I developed COMSOL Multiphysics FEM models of electrostatically actuated MEMS varactors. I optimized the device geometry and achieved a 30x improvement in tuning ratio, validating the simulations against analytical models.

I also designed and developed a laser-based SLA 3D printer, integrating its mechanical design, electronics, and STM32-based control. At Formnext Frankfurt 2025, I presented and demonstrated the Nexus AI Agent for mechanical engineering and analyzed customer workflows for AI-based optimization and automation opportunities.

Experience

Work history, roles, and key accomplishments

Fraunhofer Heinrich Hertz Institute logoFI
Current

Research Assistant

Fraunhofer Heinrich Hertz Institute

Jan 2021 - Present (5 years 10 months)

Designed and fabricated CAD-based prototypes for optical components using additive manufacturing. Optimized soldering processes for optoelectronic assemblies and performed precision surface processing for optical characterization and integration.

CO

Technical Sales Support Engineer

CosmonAI

Presented and technically demonstrated the Nexus AI Agent for mechanical engineering applications to industrial and R&D customers. Analyzed engineering workflows and customer requirements to identify AI-based optimization and automation opportunities.

Education

Degrees, certifications, and relevant coursework

BB

BHT Berlin

Master of Engineering, Mechatronics

2021 - 2025

Master of Engineering in Mechatronics with focus on mechatronic system design, CAE/CAD, automation and control, embedded systems, and additive manufacturing.

HB

HTW Berlin

Bachelor of Engineering, Microsystems Technology

2017 - 2020

Bachelor of Engineering in Microsystems Technology covering semiconductor technologies, CAE/CAD, electronics, measurement technology, and embedded systems.

Tech stack

Software and tools used professionally

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