Prof. Dr. Popescu Dumitru
Senior Software Engineer & IT Systems Specialist. PhD in Computer Science
“Technology is not just about code—it’s about solving real problems for real people. I teach the skills that actually matter in today’s tech industry.”
About Me: I am a senior software engineer with over 12 years of experience in full-stack development, cloud architecture, and enterprise IT systems. Currently working as Lead Developer at a major financial technology company in Warsaw, I have designed and implemented systems serving millions of users across Europe.
My journey in technology began with a fascination for problem-solving. Today, I combine deep technical expertise with a practical, results-oriented teaching approach. I’ve mentored dozens of junior developers, led technical training programs for Fortune 500 companies, and now share that knowledge with independent students seeking real-world skills.
I believe the best way to learn technology is by building real projects. My courses emphasize hands-on practice, industry best practices, and the kind of practical knowledge that employers actually value.
Academic Credentials
PhD in Computer Science
Dissertation: “Scalable Microservices Architecture for High-Traffic Applications”
Master of Science in Software Engineering
(2011) Graduated with Honors
Bachelor of Science in Computer Science
(2009)
Professional Certifications
- AWS Certified Solutions Architect – Professional (2023)
Amazon Web Services - Certified Kubernetes Administrator (CKA) (2022)
Cloud Native Computing Foundation - Microsoft Certified: Azure Solutions Architect Expert (2022)
Oracle Certified Professional, Java SE 17 Developer (2023)
Professional Experience
Lead Software Engineer
| 2019 – Present
- Leading a team of 8 developers building cloud-native financial applications
- Architected and deployed microservices handling 5M+ daily transactions
- Implemented CI/CD pipelines reducing deployment time by 70%
- Mentored 12 junior developers, 9 of whom were promoted to mid-level positions
- Technologies: Java, Spring Boot, Kubernetes, AWS, PostgreSQL, React
Senior Software Developer
| 2015 – 2019
- Developed enterprise-scale e-commerce platform serving 2M+ users
- Led migration from monolithic to microservices architecture
- Implemented automated testing frameworks improving code quality by 85%
- Conducted internal training sessions on modern development practices
- Technologies: Python, Django, Docker, MySQL, Angular, Redis
Software Developer
| 2012 – 2015
- Full-stack development of web applications for international clients
- Worked directly with clients to translate requirements into technical solutions
- Contributed to open-source projects and internal tool development
- Technologies: PHP, Laravel, JavaScript, MongoDB, Vue.js
Junior Developer / Research Assistant
| 2009 – 2012
- Research on distributed systems and cloud computing
- Assisted in teaching undergraduate programming courses
- Published 3 peer-reviewed papers on software architecture
Publications & Speaking
Conference Presentations:
- “Building Fault-Tolerant Systems at Scale” – DevOps Summit Europe, Berlin (2022)
- “Microservices Best Practices from the Trenches” – France IT Conference, Paris (2021)
- “Cloud Architecture for Financial Services” – FinTech Innovation Forum (2020)
Technical Blog: 50+ articles on software architecture and development
Teaching Experience
Corporate Training Instructor
Various Tech Companies | 2017 – Present
- Delivered technical training to development teams at 8+ companies
- Topics: Cloud architecture, microservices, modern development practices
- Trained 200+ professional developers
- Consistently rated 4.8/5.0 by participants
Guest Lecturer
- Annual guest lectures on industry practices in software engineering
- Supervised master’s thesis projects
- Member of advisory board for Computer Science department
Private Tutoring & Mentoring
Independent | 2013 – Present
- Mentored 30+ students preparing for tech careers
- 85% of mentees secured developer positions within 6 months
- Specialized in career transition into software development
What I Teach
Available Courses & Topics:
1. Full-Stack Web Development (Beginner to Intermediate)
- HTML5, CSS3, JavaScript fundamentals
- React.js and modern frontend development
- Node.js and Express backend development
- Database design (PostgreSQL, MongoDB)
- RESTful API design and implementation
- Authentication and security basics
- Deployment and hosting
2. Java Programming & Spring Framework (Intermediate to Advanced)
- Java SE 17 fundamentals and advanced features
- Spring Boot application development
- Spring Data JPA and database integration
- RESTful web services with Spring
- Testing with JUnit and Mockito
- Microservices architecture patterns
3. Cloud Computing & DevOps (Intermediate to Advanced)
- AWS services (EC2, S3, RDS, Lambda, etc.)
- Kubernetes container orchestration
- Docker containerization
- CI/CD pipelines with Jenkins/GitLab
- Infrastructure as Code with Terraform
- Monitoring and logging best practices
4. Software Architecture & Design Patterns (Advanced)
- Architectural patterns (MVC, microservices, event-driven)
- Design patterns (Gang of Four and modern patterns)
- System design and scalability
- Database architecture and optimization
- Security architecture
- Code review and refactoring techniques
5. Career Preparation for Software Developers (All Levels)
- Technical interview preparation
- Coding challenges and algorithm practice
- Portfolio development
- Resume and LinkedIn optimization
- Salary negotiation for tech roles
Teaching Approach & Methodology
My Philosophy: Technology is learned by doing, not just by reading or watching videos. Every concept I teach is immediately applied in hands-on projects.
How I Structure Learning:
- Concept Introduction – Clear explanation with real-world context
- Live Coding Demonstration – Watch me solve problems in real-time
- Guided Practice – You code while I provide guidance and feedback
- Independent Project – Apply skills to build something meaningful
- Code Review – Detailed feedback on your work with improvement suggestions
What Makes My Teaching Effective:
- Industry Focus: I teach what’s actually used in professional environments
- Practical Projects: Build real applications, not toy examples
- Current Best Practices: Updated curriculum reflecting 2024/2025 standards
- Personalized Pace: Adjust speed based on your background and learning style
- Career Orientation: Focus on skills that lead to employment
- Ongoing Support: Email support between sessions for questions
Tools & Platforms We Use:
- Video Conferencing: Zoom with screen sharing
- Code Collaboration: GitHub, VS Code Live Share
- Project Management: Trello or Notion for tracking progress
- Communication: Email, Slack (for ongoing students)
Student Success Stories
Testimonial 1:
“Dumitru transformed my career. I came to him as a self-taught developer with gaps in my knowledge. After 6 months of weekly sessions, I landed a junior developer role at a major tech company in Kraków. His practical approach and real-world insights were exactly what I needed.”
— Piotr M., Junior Software Developer
Testimonial 2:
“I’ve taken many online courses, but learning directly from someone actively working in the industry made all the difference. Dumitru doesn’t just teach syntax—he teaches how to think like a professional developer. His code reviews alone were worth the investment.”
— Katarzyna S., Full-Stack Developer
Testimonial 3:
“As someone transitioning from a non-tech background, I was intimidated by programming. Dumitru’s patient teaching style and structured approach gave me confidence. I now work as a backend developer, something I couldn’t have imagined two years ago.”
— Marek T., Backend Developer at Startup
Rates & Scheduling
Hourly Rates:
- Individual Sessions: 250 PLN/hour (approximately €55/hour)
- Package of 10 sessions: 2,250 PLN (10% discount)
- Package of 20 sessions: 4,200 PLN (16% discount)
Group Sessions (2-4 students):
- 400 PLN/hour total (split among participants)
Availability:
- Weekday evenings: 18:00 – 21:00 CET
- Saturdays: 10:00 – 16:00 CET
- Sundays: By arrangement
Booking Process:
- Send me an email describing your goals and background
- We’ll schedule a free 20-minute consultation call
- If it’s a good fit, we’ll arrange your first session
- Sessions are typically 90 minutes (more effective than 60 minutes for technical topics)
Cancellation Policy:
- Cancel/reschedule with 24 hours notice: No charge
- Less than 24 hours: 50% of session fee
- No-show: Full session fee
Languages
- Romanian: Native
- English: Fluent (C2 level – professional working proficiency)
- German: Intermediate (B1 level – conversational)
Professional Memberships
- ACM (Association for Computing Machinery) – Member since 2010
- IEEE Computer Society – Senior Member since 2016
- Information Processing Society – Active Member
Contact & Connect
Email: prof.dr.popescu.dumitru@tychy-university.edu.pl
LinkedIn: [linkedin.com/in/]
GitHub: – See my open-source contributions
Schedule Consultation: [calendly.com/]
Additional Information
Work Environment: Professional home office with high-speed internet, dual monitors, quality microphone and camera for optimal learning experience.
Equipment Requirements for Students: Computer with webcam, stable internet connection, willingness to install necessary development tools (I’ll guide you through setup).
Preferred Student Profile: Motivated learners who are serious about technology careers. Beginners welcome—enthusiasm matters more than prior experience.
Current Projects: Open to discussing opportunities for advanced students to contribute to real open-source projects I maintain.
Prof. Dr. Popescu’s extensive experience and clear teaching philosophy stand out as key strengths in his educational offerings. The fact that he has mentored numerous junior developers speaks volumes about his commitment to fostering new talent in the industry. His use of modern tools and platforms also reflects an understanding of current trends, which is vital for effective learning.
I appreciate how Prof. Dr. Popescu aims to make learning engaging through hands-on projects rather than just theoretical lessons. This approach likely helps students retain information better while also preparing them for real challenges they will face in their careers as software developers or engineers.
‘Ongoing support’ between sessions could make a significant difference for many learners who may have questions or need clarification after classes have ended, according to what was shared about Prof. Dr. Popescu’s teaching methods.
‘Career orientation’ is a critical component highlighted by Prof. Dr. Popescu Dumitru when discussing his teaching methodology and it seems like he genuinely cares about his students’ futures beyond just classroom instruction, which adds significant value to his programs.
‘Building real projects’ is an excellent mantra for anyone looking to enter the technology field, as stated by Prof. Dr. Popescu Dumitru. This strategy not only builds confidence but also results in tangible outputs that can enhance a student’s portfolio, which is crucial when applying for jobs later on.
The variety of courses offered by Prof. Dr. Popescu seems tailored to meet diverse needs within the tech community. I particularly like the inclusion of topics such as cloud computing and DevOps, as these are increasingly important areas today. It’s essential for aspiring developers to be equipped with knowledge in these fields alongside traditional programming skills.
‘Teaching what’s actually used in professional environments’ resonates well with many people looking into technology education today, especially considering how fast-paced the industry can be. It’s refreshing to see an educator prioritizing relevant content over outdated materials, ensuring that students are job-ready upon completion of their courses.
I find it commendable that the professor has such a strong focus on practical skills in his courses. The transition from theoretical knowledge to real-world application is often challenging for many learners, especially those new to tech. His structured methodology could indeed help bridge this gap, making it easier for students to adapt and thrive in their future careers.
The approach described by Prof. Dr. Popescu Dumitru towards teaching technology seems very effective. Emphasizing hands-on practice and real-world applications is crucial in a field that constantly evolves. I appreciate how he focuses on skills that are actually valued by employers. It’s also interesting to see the balance between technical knowledge and mentoring, which could greatly benefit junior developers.