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Data Recovery Help & File Format Reverse Engineering

From 66 Fr /h

You found an old file—something important, maybe even sentimental—but your computer just won’t open it. Or maybe you’re dealing with a custom software system that uses a weird, proprietary format. What now?

I specialize in rescuing, translating, and reverse-engineering data formats that most people don’t even recognize. Whether it’s a corrupted calendar file from a PDA or a bizarre export from a dead program, I approach it like a digital archaeologist.

It’s not magic—it’s patience, logic, and deep technical skill. If something should work but doesn’t, let me figure out why.

Location

Online from Netherlands

About Me

Having two little sisters provided me plentiful opportunities to experience first-hand what it's like to teach youngsters. With my guidance they became fluent in English as well as the language of music and theory. I never forced them to do as I say, nor did I penalize them for failing to prepare - just showing up is always sufficient. There is nothing in the world more fulfilling and meaningful than to see week by week the little steps a student takes on the path of learning. To see the milestones, the techniques they weren't able to perform just a few days prior, to see a delightful gleaming smile of success, the fact that they believed in themselves. This is what motivates me more than anything else in my piano and programming teaching voyage.

Studying and practicing can be stressful sometimes. It can be quite difficult in the early phases to train those rebellious fingers actively trying to sabotage a seemingly easy piece of music or program. It takes endurance to sit down on the same every day to practice, often without much improvement. But over time, it always becomes crystal clear, that every single second of practice counts, that practice itself improves self-control, not only within the confines of music and computers but also in everyday life.

He who never fails never tried to succeed either. The prerequisite of mastery is being a beginner.

Education

Free University Amsterdam, The Netherlands
- Artificial Intelligence Bsc class 2024
Solti György Zeneeskola, Budapest, Hungary
- Solti György Középfokú Zeneismereti Diploma
Eötvös József Gimnázium, Budapest, Hungary
- played in the band "Peaches In The Sky":

Experience / Qualifications

Python applications, Machine Learning, openCV, sklearn, numpy, pandas, tensorflow, and many many more libraries that I use in my personal projects

Age

Children (7-12 years old)

Teenagers (13-17 years old)

Adults (18-64 years old)

Seniors (65+ years old)

Student level

Beginner

Intermediate

Advanced

Duration

60 minutes

The class is taught in

English

Hungarian

Dutch

German

Skills

Information systems

Computer engineering

Computer programming

Reviews

Availability of a typical week

(GMT -04:00)

New York

Online via webcam

Mon

Tue

Wed

Thu

Fri

Sat

Sun

00-04

04-08

08-12

12-16

16-20

20-24

AI & Machine Learning Mentor / Developer for Students & Professionals

39 Fr /h

“AI is the future.” You’ve heard it before, but what does it actually mean? Facial recognition, recommendation systems, self-driving cars—it all starts with data, algorithms, and code. The best part? You can learn it too.

Whether you're a curious beginner or someone already dabbling with machine learning, I offer hands-on guidance through the AI jungle. Using libraries like Pandas, Scikit-learn, TensorFlow, and OpenCV, I’ve built projects ranging from eye-tracking systems to classification models. I know how to explain complex concepts in simple terms—and help you build real, working prototypes.

From your first regression model to deploying your neural network, I’ll be your guide. Whether you want to understand the math behind it or just want results, we’ll move at your pace. available remotely across Europe.

Tech Support for Legacy Systems and Troubleshooting Experts

44 Fr /h

Is your printer refusing to work with your computer again? Are you stuck with a weird error that no one on the forums seems to understand? Or maybe you have an ancient device that stores priceless data, but no modern system will talk to it? That’s where I come in - call me your digital detective.

I specialize in solving the kinds of tech problems most people walk away from—legacy hardware, software compatibility issues, obscure drivers, and cryptic error messages. Whether it’s a memory leak in a 20-year-old Palm PDA or making two completely unrelated systems communicate, I’ve been there and I've fixed that.

If your setup is unique, outdated, or just plain broken, I’ll treat it like a puzzle worth solving. Tech archeology meets modern ingenuity. I’m also happy to travel and work on-site if needed—sometimes the only way to truly understand a system is to sit down with it in person.
“Legacy systems fear him. Devs envy him. Managers don’t understand him.” - one of my clients, probably.

Casper

5.0

(1)

Answer to the many questions related to information technology.
Want to know how something works, or how you can prevent something.
You have come to the right place, I can teach you in all areas of information technology.
Below you see several questions to which I can give you a clear and straightforward answer. I can explain this to you at any level and we can go deep where you want it. Is your question not listed? Let me know. There are simply too many questions to write here.

How does the internet work?
How does a computer network work?
What is a DHCP server and how does DNS work?

How do I keep my identity hidden online?
What are cookies?
What does my computer store?
How does the Wehkamp site know that I like those pants?

How does Excel work? and Word? and Powerpoint?
What is a router?
How does WiFi work and can my neighbor on my network?
Do I have a strong password?
What is hacking?
How does a computer virus and ransomware work?
How does a firewall work?
What is blockchain?

I teach at different levels, if you are interested you can always send an email without obligation with your question. We can then make a personal study plan.
My specialization is internet security, but I got there by gaining knowledge within all facets of information technology. From system administration, network management and explaining the various functions in Windows or IOS to repairing the hardware of a PC.
I studied business informatics at the Hogeschool van Amsterdam. Nowadays I live on Curacao, but I can give great lessons via webcam. And through the possible use of team viewer or G + I can show on your computer how to configure a router, for example. Nothing is impossible ;-)

5.0

(1)

The digital landscape is evolving at an unprecedented rate, and cyber threats lurk around every corner. Cybersecurity resilience in the modern world cannot be just an add-on - it's a necessity. Offensive security professionals like ethical hackers and penetration testers can help proactively discover unknown threats and address them before the cybercriminals do.

This Cisco Certified Ethical Hacker course is designed to equip you with an Ethical Hacker skillset and provide a solid understanding of offensive security. You will become proficient in the art of scoping, executing, and reporting on vulnerability assessments, while recommending mitigation strategies. Follow an engaging gamified narrative throughout the course and get lots of practice with hands-on labs inspired by real-world scenarios.

After completing this course, continue your cybersecurity career in offensive security as an ethical hacker or penetration tester. Or use this course to strengthen your defensive security knowledge. By understanding the mindset of threat actors, you will be able to more effectively implement security controls and monitor, analyse, and respond to current security threats.

**** Module Covered ****
+ Module 1: Introduction to Ethical Hacking and Penetration Testing
+ Module 2: Planning and Scoping a Penetration Testing Assessment
+ Module 3: Information Gathering and Vulnerability Scanning
+ Module 4: Social Engineering Attacks
+ Module 5: Exploiting Wired and Wireless Networks
+ Module 6: Exploiting Application-Based Vulnerabilities
+ Module 7: Cloud, Mobile, and IoT Security
+ Module 8: Performing Post-Exploitation Techniques
+ Module 9: Reporting and Communication
+ Module 10: Tools and Code Analysis
+ Final Capstone Activity

** Module Exams: 10 Module Exams
** Final Course Exam: 01 Final Course Exam
** Approximately 70 hours of training.

Hafizou

5.0

(1)

The main goal of this training is to prepare you in the best possible conditions to successfully pass the CISA certification.
It will give you the skills to lead and control corporate IT and perform an effective security audit on any organization. You gain expertise in the acquisition, development, testing and implementation of information systems and you will learn the guidelines, standards and best practices to protect them.

Anas

5.0

(1)

Accounting on SAP:
- General accounting (G/L accounting)
- Supplier Accounting (Accounts Payable)
- Customer accounting (Accounts Receivable)
- Automatic Payment Program
- Bank accounting (Banking)
- Cost center accounting

Dr.

5.0

(1)

Explain the lessons of finite and infinite calculus with applications on calculus
Explanation of Diff & Integral.
Applications on calculus.
Are and volume calculations for solids boundaries by curves
In an easy and simplified way, with the solution of the examples mentioned in the previous exams and Assignments & Quizzes

David

5.0

(1)

Using a computer and these applications can be complicated for some and I therefore offer training to those who need it.

This training includes basic and advanced use of Windows computers and/or Mac OS (Apple) multiple applications such as the MS-Office suite (Word, Powerpoint, Excel etc.), Teams, Outlook etc...

Being a graduate with more than 20 years of experience at different levels in the field, it is possible to approach different levels of complexity from beginner to expert in Microsoft/Windows and/or Apple/MacOS/IOS environments.

Do not hesitate to contact me and I will be happy to answer your questions.

David

Thierry

5.0

(1)

Hello,
The cost package includes theoretical aspects (Enterprise IS, Connectivity, datacenter, AI, Green IT), project management methodology, market monitoring and career opportunities.
Please contact me privately for details.
Thank you for your interest.

Dr.Ibrahim

5.0

(1)

This course provides a foundational understanding of Information Technology, data centers, covering architecture, power & cooling, networking, storage, virtualization, security and lots more. Learn best practices for efficiency, scalability, and reliability while exploring emerging data center solutions. Ideal for IT professionals, engineers, and facility managers involved in data center deployment or management.

This course offers a comprehensive exploration of Information Technology, data center infrastructure, guiding students through the entire lifecycle—from initial design and planning to day-to-day operations and long-term performance optimization. Students will learn the critical components of data center design, including site selection, power and cooling systems, space planning, networking, and physical security. The course also covers operational best practices, monitoring tools, energy efficiency strategies, disaster recovery planning, and emerging trends. By integrating technical, environmental, and management perspectives, students will gain the knowledge and skills required to build and maintain high-performance, cost-effective, and sustainable data center environments.

Dr.Ibrahim

5.0

(1)

This course introduces students to the fundamentals of Information and Communication Technology (ICT) and its role in modern society. Topics include computer hardware and software, digital communication tools, internet technologies, data management, cybersecurity, and emerging trends. Students will gain practical skills in using productivity software, conducting online research, and understanding the ethical and responsible use of digital resources. The course emphasizes both technical proficiency and digital literacy, preparing learners to confidently navigate and contribute to a technology-driven world.

Sami

5.0

(1)

A computer science engineer with a Master's degree (Bac+5), specializing in programming and algorithms, I have been a private tutor since 2023. I support middle school, high school, and post-secondary students with a clear, supportive, and structured teaching approach. My goal is to strengthen logic, methodology, and confidence so that each student can make lasting progress and achieve their academic goals.

Passionate about teaching and sharing computer science knowledge, I also volunteer to help young people develop their logic, autonomy and digital skills in a caring and motivating environment.

I support high school and post-baccalaureate students according to their field of study:

- NSI (general high school): Python, algorithms, web basics (HTML, CSS, JavaScript) and databases (SQL)

- STI2D – SIN option: Python, PHP, C (Arduino), technical projects and embedded systems

- Vocational Baccalaureate (Digital Systems): networks, systems and applied programming

- BTS in Computer Science: structured and object-oriented programming, professional projects and tools

My approach is based on listening, patience, and teaching methods adapted to each individual's profile, in order to foster success, motivation, and a desire to learn.

Ali

5.0

(1)

Learn Arduino, robotics and electronics one to one with a qualified electronics engineer who teaches this at university level. Complete beginners through to degree students, online worldwide or in person in Birmingham, with a free 30 minute introduction before you book anything.

I'm Ghous. I hold an MSc in Electronics and Electrical Engineering with Distinction from the University of Chester, where I teach as a Visiting Lecturer on a Master's module, and I work as a freelance engineer designing circuit boards and writing embedded firmware for clients. I have taken a four layer ESP32 board from schematic to manufactured hardware, built the electrical power system for a CubeSat, and published two international conference papers on running neural networks on microcontrollers. When you ask why your sensor reads nothing or how to justify a design choice in a report, the answer comes from doing this work rather than from a tutorial.

Adults and hobbyists

If you own an Arduino kit and have stalled, or you can copy a project but cannot change it, this is the gap I close. We build what you actually want, home automation, data logging sensors, motorised builds, a device that talks to your phone, and underneath it you pick up the real skills: reading a datasheet, using a multimeter, wiring safely and debugging when nothing happens. No technical background required.

University and college students

Embedded systems, microcontrollers, robotics, control systems, circuit analysis and digital electronics. Arduino, ESP32, nRF52, PIC with MPLAB and STM32, plus Proteus, Multisim, Webots and PCB design in KiCAD. I also supervise final year and Master's projects from scoping through to the write up. I mark Level 7 work myself, so I know where reports lose marks. I teach students on UK, IB and continental European programmes and have worked with engineering students in Germany, so an unfamiliar syllabus is not a problem. Send me your course material and I will work from it.

School students, ages 9 to 18

Beginners who want to build something real, and students with coursework in Design and Technology, Computer Science or Engineering, whether on GCSE, A Level, IB or a national curriculum. Typical builds are a line following robot, an obstacle avoiding car, a live weather station or a motion triggered alarm. For lessons in Birmingham I bring all the equipment. Parents are welcome to sit in on the first session (UK DBS checked).

How lessons run

Tell me your level and what you want to build, or send your assignment brief, and I plan the session around it before we meet. I demonstrate first, then you take over while I guide, because nobody learns electronics by watching. Online students share a screen and I debug code and wiring photos live. Every session ends with something working and a clear next step, and you can message me between lessons.

Lessons run over Google Meet or Zoom, 60 or 90 minutes. I teach across GMT and Central European time with evening and weekend slots. Online students can start with any board they already own, or I will point you at one starter kit under 30 euros that covers the first several months.

Message me with your level and what you are trying to build and we will arrange the free 30 minutes.

Leila

5.0

(1)

I offer personalized online Physics lessons designed to help students understand concepts clearly, improve their problem-solving skills, and gain confidence in Physics.

As an engineer and PhD student, I provide structured and engaging lessons adapted to each student’s level and learning needs. We can work on theory, exercises, homework, exam preparation, and challenging topics step by step.

My goal is not only to help you find the right answer, but to make sure you truly understand the reasoning behind it.

Whether you need help catching up, preparing for an exam, or simply improving your Physics skills, I would be happy to support you on your learning journey.

Javier

5.0

(1)

Hello,

After a 34-year career in systems engineering (including roles as AVP System Engineer & Product Owner at Moody's), I've learned one essential truth: technology is useless if it remains overly complex.

There is NO set curriculum or pre-defined syllabus: every session is 100% tailor-made. I adapt entirely to your request, your skill level, and your current objectives—whether that means gently discovering a new tool or solving a specific technical challenge.

My approach is built on clear, accessible guidance: no unnecessary jargon, no dull theory, and no prerequisites required. My goal is to make technology accessible, seamless, and immediately useful (if my experience helps you avoid a few costly surprises, then I’ve done my job).

Examples of what we can cover together:

Discover and Master AI (ChatGPT, Copilot, Claude, Gemini, Veo, etc.)

Learn how to write clear prompts to get accurate results (prompt engineering).

Use AI to draft content, summarize documents, analyze data, or organize your daily work.

Understand best practices to use these tools securely.

Simplify and Automate Your Daily Tasks

Connect your collaborative tools (emails, files, calendars, M365 services) to eliminate repetitive actions.

Migrate to new M365 services smoothly.

Set up simple virtual assistants to save you time.

Optimize Your Digital Tools & Cloud Environment

Take control of your IT workspace, organize collaborative environments, and secure your access.

How?
We start with YOUR topics: a practical problem to solve, a project to bring to life, or a tool you want to master. Everything is explained clearly and patiently so that you leave every session with practical, actionable solutions.

Whatever your starting point or project, the course adapts to you—never the other way around.

Achref

5.0

(1)

Ingénieur systèmes et réseaux, je propose des cours de Linux adaptés aux débutants, étudiants et personnes souhaitant développer des compétences professionnelles en administration système.

Vous apprendrez progressivement à utiliser et administrer un système Linux : ligne de commande, navigation dans le système, fichiers et répertoires, utilisateurs et groupes, permissions, processus, services, installation de logiciels, stockage, réseau, SSH, logs et dépannage.

Pour les niveaux intermédiaire et avancé, nous pouvons approfondir l’administration de serveurs Linux, systemd, LVM, configuration réseau, DNS, sécurité, automatisation avec Ansible, virtualisation et conteneurs avec Podman/Docker.

Les cours sont principalement pratiques, avec des commandes, exercices et situations réelles de dépannage. Le programme est personnalisé selon votre niveau et votre objectif : découverte de Linux, études, préparation professionnelle ou perfectionnement en administration système.

Laith

5.0

(1)

What if you could think like a hacker, so you can stop one? Let's learn cybersecurity the real way.

I'm a cybersecurity engineer with 3 years of experience and 150+ penetration tests and vulnerability assessments for government, financial, and telecom organizations. I hold CRTP, eWPT, and eJPT certifications, and I'll teach you what actually works in the field. No boring theory dumps, just live, hands-on learning.

You'll learn:

How attackers think: the hacking process from recon to exploitation
Common web attacks like SQL injection and XSS, and how to stop them
Passwords, phishing, and social engineering: why people are the weakest link
Vulnerability scanning and ethical hacking basics with Nmap, Burp Suite, and Nessus
How defenders work: firewalls, SIEM, EDR, and incident response
How to protect yourself, your team, and your business

Perfect for: beginners, career changers, students, developers, IT staff, and anyone curious about ethical hacking or preparing for Security+, CEH, or eJPT.

You'll walk away with a clear understanding of real threats, the skills to spot and fix common vulnerabilities, and a solid foundation for a cybersecurity career.

No experience needed, just curiosity and a computer. Book your first session and let's dive in!