I am a Python developer with professional experience building data-intensive applications, REST APIs, and real-time processing systems. My background includes developing Python solutions in both the financial sector and environmental monitoring domain, working with technologies such as Python, PostgreSQL, MongoDB, JavaScript, Docker, and cloud-hosted applications. I enjoy solving complex technical problems, designing scalable systems, and taking ownership of projects from architecture through deployment. My experience combines strong software engineering fundamentals with the ability to quickly learn new technologies and deliver practical solutions.

Marian -Daniel Robu

I am a Python developer with professional experience building data-intensive applications, REST APIs, and real-time processing systems. My background includes developing Python solutions in both the financial sector and environmental monitoring domain, working with technologies such as Python, PostgreSQL, MongoDB, JavaScript, Docker, and cloud-hosted applications. I enjoy solving complex technical problems, designing scalable systems, and taking ownership of projects from architecture through deployment. My experience combines strong software engineering fundamentals with the ability to quickly learn new technologies and deliver practical solutions.

Available to hire

I am a Python developer with professional experience building data-intensive applications, REST APIs, and real-time processing systems. My background includes developing Python solutions in both the financial sector and environmental monitoring domain, working with technologies such as Python, PostgreSQL, MongoDB, JavaScript, Docker, and cloud-hosted applications. I enjoy solving complex technical problems, designing scalable systems, and taking ownership of projects from architecture through deployment. My experience combines strong software engineering fundamentals with the ability to quickly learn new technologies and deliver practical solutions.

See more

Experience Level

Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
See more

Language

Romanian, Moldavian, Moldovan
Fluent
English
Fluent

Work Experience

Python Developer at Worldline Technologies
March 1, 2026 - Present
Developed and maintained Python-based data processing migration scripts for large-scale banking datasets using Pandas and NumPy, focusing on accuracy and performance during data transformations. Worked with Oracle databases to validate, manipulate, and migrate structured financial data. Contributed to automation and optimization of internal migration workflows.
IoT Software Engineer - Python Developer at Pi Sound Logger II - Environmental Acoustic Monitoring System II (GitHub: RobuDan/pi-sound-logger)
September 1, 2023 - September 30, 2025
Delivered and deployed a real-time acoustic data pipeline using Python asyncio and NSRT-mk4 over a serial interface on Raspberry Pi. Architected a modular, event-driven system with automatic logging and cloud-compatible formatting. Integrated continuous data flow into MongoDB Atlas for long-term storage and visualization. Implemented 24/7 uptime with automated service recovery using Bash deployment scripts. Reduced hardware costs (~€20,000 to ~€500 per unit) by engineering a cost-effective pipeline around NSRT-mk4 sensors.
IoT Software Engineer – Python Developer at Pi
September 1, 2023 - September 1, 2025
Delivered and deployed a real-time data pipeline for acoustic parameter capture and audio recordings using Python asyncio and NSRT-mk4 via a serial interface. Architected a modular, event-driven data collection system with automatic logging and cloud-compatible formatting, and integrated continuous data flow into a central MongoDB Atlas instance for long-term storage, visualization, and reporting. Ensured 24/7 uptime with automated service recovery and health checks via Bash-based deployment scripts for unattended operation on Raspberry Pi. Reduced hardware costs from €20,000 to ~€500 per unit by designing a cost-effective NSRT-mk4 sensor pipeline.
IoT Software Engineer - Python Developer at Enviro Consult Bucharest, Romania
January 1, 2023 - December 31, 2023
Developed a sensor-to-cloud data pipeline for continuous audio, spectral, and acoustic data from a BK2255 Class 1 SLM via Open Interface API. Logged high-resolution data locally to MariaDB and migrated data to MongoDB for remote access and long-term retention. Automated deployment using Bash scripts and optimized historical dataset queries, reducing retrieval time by ~40%.
Full-Stack Python Developer at Platform for data visualization (envi.ro authorization/login)
January 1, 2023 - December 31, 2023
Built a full-stack web platform for real-time and historical acoustic data visualization supporting multiple sensor devices. Developed REST APIs using Quart with JWT authentication and role-based access control. Implemented dynamic frontend views with vanilla JavaScript, Chart.js for parameter plotting, and Leaflet.js for live map tracking from MongoDB Atlas. Fully deployed on a virtual private cloud server.
Full-Stack Python Developer at Enviro Consult Bucharest
January 1, 2023 - January 1, 2023
Built a full-stack platform for real-time and historical acoustic data visualization. Implemented RESTful APIs using Quart, secured via JWT authentication with granular role-based access control. Rendered dynamic frontend views using vanilla JavaScript, Chart.js, and Leaflet.js for live map tracking and dashboards. Fully deployed on a private cloud server.
IoT Software Engineer – Python Developer at Pi
January 1, 2023 - January 1, 2023
Developed a sensor-to-cloud data pipeline capturing continuous audio, spectral, and acoustic data from the BK2255 Class 1 SLM via Open Interface API. Logged high-resolution data locally to MariaDB with cloud data migration to MongoDB for remote access and long-term retention. Automated deployment using Bash scripts. Optimized queries for historical acoustic datasets, reducing retrieval time by ~40%.
Software Development Intern at Enviro Consult Bucharest, Romania
March 1, 2022 - May 31, 2022
Contributed to a real-time data acquisition project involving audio and video capture triggered by environmental input. Gained early experience with sensor-based automation, data stream control, and system integration, which later informed Python-based data logging and monitoring projects.
Software Development Intern at Enviro Consult Bucharest
March 1, 2022 - May 1, 2022
Contributed to a real-time data acquisition project involving audio and video capture triggered by environmental input. Gained experience with sensor-based automation, data stream control, and system integration, which later influenced Python-based data logging and monitoring projects.

Education

Master of Science at National University of Science and Technology Politehnica Bucharest
October 1, 2023 - June 1, 2025
European Project Semester at Instituto Superior de Engenharia do Porto
February 1, 2023 - June 1, 2023
Erasmus Exchange at Università degli Studi di Milano - Politecnico di Milano
September 1, 2022 - February 1, 2023
Bachelor of Engineering at National University of Science and Technology Politehnica Bucharest
September 1, 2019 - July 1, 2023
Master of Science (Business Engineering and Entrepreneurship) at National University of Science and Technology Politehnica Bucharest
October 1, 2023 - June 30, 2025
European Project Semester at Instituto Superior de Engenharia do Porto
February 1, 2024 - June 30, 2024
Bachelor of Engineering (Mechatronics and Robotics) at National University of Science and Technology Politehnica Bucharest
September 1, 2019 - July 31, 2023
Erasmus Exchange (Mechatronics and Robotics) at Politecnico di Milano
September 1, 2022 - February 28, 2023

Qualifications

CS50P Harvard University
January 11, 2030 - February 13, 2026
CS50P
January 1, 2024 - July 8, 2026
Oracle: Databases for Developers: Foundations
January 1, 2024 - July 8, 2026

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Manufacturing, Other, Education, Computers & Electronics, Financial Services, Energy & Utilities