Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

C++ developer with hands-on experience in embedded Linux systems, security hardening, and low-level tooling for production environments. Currently working on a custom Debian-based ARM platform in the railway domain, focusing on performance, reliability, and compliance-driven cybersecurity features. Strong background in systems programming (C/C++), Linux internals, and automation. Experienced in designing practical tools that simplify complex operational workflows and make secure systems usable by non-technical staff. Comfortable working across the full lifecycle: debugging, feature development, migration of legacy systems, and mentoring other developers. Regularly use Python for automation, internal tools, data processing, and rapid prototyping to support C++ and Linux development workflows. Previously worked as an Advanced Support Engineer at Oracle, supporting enterprise database environments with a focus on performance analysis, secure access, and Linux-based troubleshooting.…C++ developer with hands-on experience in embedded Linux systems, security hardening, and low-level tooling for production environments. Currently working on a custom Debian-based ARM platform in the railway domain, focusing on performance, reliability, and compliance-driven cybersecurity features. Strong background in systems programming (C/C++), Linux internals, and automation. Experienced in designing practical tools that simplify complex operational workflows and make secure systems usable by non-technical staff. Comfortable working across the full lifecycle: debugging, feature development, migration of legacy systems, and mentoring other developers. Regularly use Python for automation, internal tools, data processing, and rapid prototyping to support C++ and Linux development workflows. Previously worked as an Advanced Support Engineer at Oracle, supporting enterprise database environments with a focus on performance analysis, secure access, and Linux-based troubleshooting.

Claudiu Mocanu-Vasile





C++ developer with hands-on experience in embedded Linux systems, security hardening, and low-level tooling for production environments. Currently working on a custom Debian-based ARM platform in the railway domain, focusing on performance, reliability, and compliance-driven cybersecurity features. Strong background in systems programming (C/C++), Linux internals, and automation. Experienced in designing practical tools that simplify complex operational workflows and make secure systems usable by non-technical staff. Comfortable working across the full lifecycle: debugging, feature development, migration of legacy systems, and mentoring other developers. Regularly use Python for automation, internal tools, data processing, and rapid prototyping to support C++ and Linux development workflows. Previously worked as an Advanced Support Engineer at Oracle, supporting enterprise database environments with a focus on performance analysis, secure access, and Linux-based troubleshooting.…C++ developer with hands-on experience in embedded Linux systems, security hardening, and low-level tooling for production environments. Currently working on a custom Debian-based ARM platform in the railway domain, focusing on performance, reliability, and compliance-driven cybersecurity features. Strong background in systems programming (C/C++), Linux internals, and automation. Experienced in designing practical tools that simplify complex operational workflows and make secure systems usable by non-technical staff. Comfortable working across the full lifecycle: debugging, feature development, migration of legacy systems, and mentoring other developers. Regularly use Python for automation, internal tools, data processing, and rapid prototyping to support C++ and Linux development workflows. Previously worked as an Advanced Support Engineer at Oracle, supporting enterprise database environments with a focus on performance analysis, secure access, and Linux-based troubleshooting.

Available to hire

C++ developer with hands-on experience in embedded Linux systems, security hardening, and low-level tooling for production environments. Currently working on a custom Debian-based ARM platform in the railway domain, focusing on performance, reliability, and compliance-driven cybersecurity features.

Strong background in systems programming (C/C++), Linux internals, and automation. Experienced in designing practical tools that simplify complex operational workflows and make secure systems usable by non-technical staff. Comfortable working across the full lifecycle: debugging, feature development, migration of legacy systems, and mentoring other developers.

Regularly use Python for automation, internal tools, data processing, and rapid prototyping to support C++ and Linux development workflows.

Previously worked as an Advanced Support Engineer at Oracle, supporting enterprise database environments with a focus on performance analysis, secure access, and Linux-based troubleshooting.

Skills

Experience Level

Expert

Expert

Expert

Intermediate

Language

Romanian, Moldavian, Moldovan

Fluent

English

Advanced

Work Experience

C++ Developer at Hitachi Rail

July 1, 2023 - June 30, 2025

Worked on features and performance improvements for a custom Debian-based embedded Linux system (ARM 32-bit), while handling client defect reports and providing fixes when needed. Added cybersecurity-related functions to meet C3S requirements (access control, audit logging, firewall rules, integrity checks, external device control and identity verification). Built a small CLI tool with custom file formats to simplify client system setup, replacing serial connections and bash commands with a USB auto-mounting process with failsafes, enabling non-technical staff to perform the procedure. Modified and extended a general-purpose system hardening Ansible framework to allow dynamic task adjustments while maintaining compatibility with existing tasks. Assisted migration of the product from SysV init to a modern Debian variant to improve security and access newer packages for C3S. Mentored new developers on project structure and best practices, conducted code reviews, and provided hands-on lea

Advanced Support Engineer at Oracle

May 1, 2022 - June 30, 2023

Supported Oracle databases with a focus on performance and secure access in customer environments. Produced and delivered database performance reports, analyzed trends, and highlighted areas of concern based on client logs. Used SQL*Plus and Linux tools for basic debugging and virtual machine management in support tasks.